OIL COUNTRYTUBULAR GOODS

x 5.21 R3 GRADE PS80 73 x 5.51 R2 114.3 NUE OIL COUNTRYTUBULAR GOODS PRUDENTIAL STEEL

E PS80 098 08908076 3.12 3513813 567 EUE 60.3 x 4.83 R2 GRADE H40 73 x 5.51 R2 ST + C NUE 73.0 x 5.5 R2 HFIW RELIABLEPRODUCT

3488439843 1525435 5164131 13841 84368748*5 368. 3893 3793793793 7979 0890 APIRPSCI GRAD 3387553 8999779 98900600 98080 Prudential Steel Ltd. is committed to providing quality products and services which consistently meet or exceed our customers needs and expectations. We pledge to provide this through employee involvement and close relationships with our customers, and share our successes with our employees and associates. Together, we can make it happen. CONSISTENT & RELIABLE PRUDENTIAL STEEL Prudential Steel Ltd. uses high-frequency induction welding (HFIW) to ensure a weld seam of the highest integrity. Hydrostatic and non-destructive testing further assures the integrity of the weld. Prudential has its own non-destructive testing department (NDT), supervised by an American Society of Nondestructive Testing (ASNT) Level 3 Technician. State-of-the-art ultrasonic testing of the weld and electromagnetic inspection of the body ensures all products meet or exceed specifications. Through highly efficient operations, Prudential Steel Ltd. features a flexible manufacturing ability to shift production runs from various sizes, shapes and quantities quickly and cost effectively. If existing inventory for your product needs is not available, we pride ourselves in our ability to respond to customer demand. Prudential Steel Ltd. s commitment to all aspects of Total Quality Management and Continuous Improvement is evident through our Partners in Quality program. This quality program results in a product you can trust from a manufacturer you can rely on.

NUE ST + C GRADE H40 ADDEDVALUE 114.3 x 5.21 R3 73 x 5.51 R2

GRADE PS80 EXPANDED PRODUCT LINE Over the years, Prudential has adapted to the changing needs of its customers by expanding its product line and offering new products to the marketplace. One of Prudential s latest developments is PS80 grade casing. PS80 is an as rolled proprietary casing specification with a minimum yield strength of 80,000 PSI. External stress tests have indicated a lower level of strength loss than usually experienced with L80 seamless product. To complement PS80 we have a working relationship with Hunting Interlock of Houston,Texas, to supply the BOSS connection on thermal applications. PREMIUM PIPE THREADING FACILITY Prudential added a premium pipe threading facility to apply premium threads not only to our HFIW Tubular Products, but also to other pipe products that hold higher values than HFIW. In keeping with our commitment to provide our customers with products that will meet their demanding and ever-changing needs as well as focusing on convenience and service, Prudential is associated with Hydril and Hunting Interlock.We offer customers the following Premium Connections, making Prudential a one-stop-shop for those who require such threads. PRUDENTIAL STEEL Hydril Series 500 Wedge Thread Hydril 563 Thermal Connection Hunting Interlock Boss, SLHT Hunting 40-40 Tubing & Casing Connections Prudential has worked hard to add value to its products for its customers and to provide excellent service to the superior products we sell. Size Range Casing Tubing Metric (mm) Imperial (in.) Metric (mm) Imperial (in.) Outside Diameter 114.3 to 298.4 4 1 /2 to 11 3 /4 60.3 to 114.3 2 3 /8 to 4 1 /2 Wall Thickness 5.21 to 12.70 0.205 to 0.500 4.83 to 6.88 0.190 to 0.271 Grades Casing Tubing H40 (API) X X J55 (API) X X J55 Modified X X PS80 X

73 x 5.51 R2 114.3 x 5.21 R3 GRADE JSS TUBULAR GOODS PRODUCT AVAILABILITY CASING SIZES Nominal size Nominal weight Wall thickness Material End Finish API Proprietary mm in. kg/m lb./ft. mm in. H40 J55 J55 Modified PS80 STC LTC 114.3 4 1/2 14.14 9.50 5.21 0.205 X X X 15.63 10.50 5.69 0.224 X X X 17.26 11.60 6.35 0.250 X X X X 139.7 5 1/2 20.83 14.00 6.20 0.224 X X X 23.07 15.50 6.99 0.275 X X X X X 25.30 17.00 7.72 0.304 X X X X 177.8 7 25.30 17.00 5.87 0.231 X X 29.76 20.00 6.91 0.272 X X X 34.23 23.00 8.05 0.317 X X X X 38.69 26.00 9.19 0.362 X X X X 219.1 8 5/8 35.72 24.00 6.71 0.264 X X X 41.67 28.00 7.72 0.304 X X X X 47.62 32.00 8.94 0.352 X X X X 244.5 9 5/8 48.07 32.30 7.92 0.312 X X 53.57 36.00 8.94 0.352 X X X X 59.53 40.00 10.03 0.395 X X X 273.1 10 3/4 48.74 32.75 7.09 0.279 X X 60.27 40.50 8.89 0.350 X X X X 298.4 11 3/4 62.50 42.00 8.46 0.333 X X 69.94 47.00 9.53 0.375 X X NOTES H40 and J55 are API grades. J55 Modified has proven hardness values below Rockwell C22. It is suitable for applications in less severe sour service. PS80 is a Prudential Steel proprietary grade intended to provide performance equivalent to API N80. PS80 is suitable for use in applications requiring higher joint strengths and collapse or burst ratings where API J/K55 is not adequate. PS80 uses API L80 couplings. PS80 is used for both sweet and sour applications. PS80 Sour can be used for applications up to 15% H2S. Specialty end finish connection products are available on special order. Please inquire. Casing is provided in Range 3 lengths unless specially ordered otherwise. TUBING SIZES Nominal size Nominal weight Wall thickness Material End Finish mm in. kg/m lb./ft. mm in. J55 J55 Modified NUE EUE PRE 60.3 2 3/8 6.85 4.60 4.83 0.190 X X X X 6.99 4.70 4.83 0.190 X X X 73 2 7/8 9.52 6.40 5.51 0.217 X X X X 9.67 6.50 5.51 0.217 X X X 88.9 3 1/2 13.69 9.20 6.45 0.254 X X X X 13.85 9.30 6.45 0.254 X X X 114.3 4 1/2 18.76 12.60 6.88 0.271 X X X X 18.98 12.75 6.88 0.271 X X X NOTES J55 is API grade. J55 Modified has proven hardness values below Rockwell C22. It is suitable for applications in less severe sour service. Specialty ( PRE ) end finish connection products are available on special order. Please inquire. Tubing is provided in Range 2 lengths unless specially ordered otherwise.

60.3 x 4.83 R2 GRADE AND TOLERANCE SPECIFICATIONS GRADE TENSILE REQUIREMENTS H40 J55 J55 Modified PS80 Casing Tubing & Casing Tubing & Casing Casing Grade MPa psi MPa psi MPa psi MPa psi Minimum Yield Strength 276 40,000 380 55,000 380 55,000 552 80,000 Maximum Yield Strength 552 80,000 552 80,000 552 80,000 759 110,000 Minimum Ultimate Tensile Strength 414 60,000 518 75,000 518 75,000 655 95,000 Colour Band ID 1 Black 1 Green I Green 1 Red Hardness Control Yes No Yes Yes Governing Standard API API Prudential Steel Ltd. Prudential Steel Ltd. Above data for API H40 and J55 taken from API SCT, Specification for Tubing and Casing, ed. April 1, 1995. J55 Modified has proven hardness values below Rockwell C22. It is suitable for applications in less severe sour service. PS80 is a Prudential Steel proprietary grade intended to provide performance equivalent to API 80 grade materials. PS80 is suitable for use in applications requiring higher burst, tensile and collapse ratings than can be obtained with API J/K55. PS80 uses API L80 couplings. PS80 is used for both sweet and sour applications. PS80 Sour can be used for applications up to 15% H2S. PS80 is available only on limited casing sizes. Please call for availability. TOLERANCES ON DIMENSIONS 1. OUTSIDE DIAMETER (Nominal size, D) The tolerance on outside diameter of tubing and casing is based on the nominal size of the tube: Outside Diameter, D mm in. Tolerance on Diameter mm in. 101.6 and less 4 and less +/- 0.79 +/- 0.030 114.3 and larger 4.5 and larger + 1 per cent- 0.5 per cent 2.WALL THICKNESS (Nominal wall, t) The tolerance on wall thickness is +/-12.5% of the nominal wall for all sizes and weights, both tubing and casing. 3. DRIFT TEST (Drift diameter) Each length of tubing and casing must allow passage of a cylindrical drift mandrel, without undue restriction or applied force.the drift mandrel is to be cylindrical in shape not bone shaped. In order to properly drift pipe, the inside surfaces of the joint must be free of all foreign matter and the pipe adequately supported so as to prevent sagging under its own weight.the diameter of the drift mandrel is based on the inside diameter, d, of the pipe. Dimensions of the drift mandrel are as below: Product & Size mm in. Drift Mandrel Length mm in. Drift Mandrel Diameter mm in. Casing 219.0 and less 8-5/8 and less 152.4 6.00 d 3.18 d 0.125 244.5 to 339.7 incl. 9-5/8 to 13-3/8 incl. 304.8 12.00 d 3.97 d 0.156 406.4 and greater 16 and greater 304.8 12.00 d 4.76 d 0.188 Tubing 73.0 and less 2-7/8 and less 1066.8 42.00 d 2.38 d 0.094 88.9 and greater 3-1/2 and greater 1066.8 42.00 d 3.18 d 0.125 4. RANGE LENGTHS All tubing and casing is provided in Range Lengths, with tubing commonly provided in Range 2, and casing in Range 3. By special order, tubing and casing may be provided in other range lengths. Product Range 1 m ft. Range 2 m ft. Range 3 m ft. Casing 4.88 7.62 16 25 7.62 10.36 25 34 13.55 44.6 Tubing 6.10 7.32 20 24 8.53 9.75 28 32 Non standard 5. PUP JOINTS Prudential also provides API tubing pup joints, in J55 grade, in standard API lengths of 0.61m (2ft), 1.22m (4ft), 1.83m (6ft), 2.44m (8ft), 3.05m (10ft), and 3.66m (12ft). All pup joint lengths are +/-76mm (3.0in). Pup joints are available as EUE, NUE, and with Specialty end finish connections.

84368748*5 368. 3893 3793793793 7979 0890567 3387553 8999779 98900600 98080098 5464846466 548334343 3543548 118631383 3488439843 1525435 5164131 138413.12 DIMENSIONAL & MINIMUM PERFORMANCE DATA S.I. CASING Metric Weight Pipe Body Data ST&C Connection LT&C Connection OD PE T&C Wall ID Drift Conn Grade Burst Collapse PE M/U Int. Joint Set M/U Int. Joint Set t OD Tens loss yield strength depth loss yield strength depth mm kg/m kg/m mm mm mm mm kpa kpa dan mm kpa dan m mm kpa dan m 114.3 13.99 14.14 5.21 103.9 100.7 127.0 J55 30,220 22,800 67,488 50.8 30,220 44,840 2,014 15.22 15.63 5.69 102.9 99.7 127.0 J55 33,050 27,600 73,260 66.7 33,050 58,608 2,389 16.86 17.26 6.35 101.6 98.4 127.0 J55 36,910 34,200 81,696 66.7 36,920 68,376 2,530 76.2 36,915 71,928 2,660 16.86 17.26 6.35 101.6 98.4 127.0 PS80 53,674 43,878 118,548 76.2 5,3674 116,772 3,877 139.7 20.39 20.83 6.20 127.3 124.1 153.7 J55 29,460 21,500 98,568 73.0 18,770 76,368 1,902 22.84 23.07 6.99 125.7 122.6 153.7 J55 33,190 27,850 110,112 73.0 33,190 89,688 2,460 88.9 33,189 96,348 2,459 22.84 23.07 6.99 125.7 122.6 153.7 PS80 48,300 34,430 160,728 88.9 48,300 135,860 3,043 25.11 25.30 7.72 124.3 121.1 153.7 J55 36,710 33,850 121,212 73.0 36,708 101,676 2,563 88.9 36,710 109,668 2,768 25.11 25.30 7.72 124.3 121.1 153.7 PS80 53,400 43,370 176,268 88.9 53,400 154,956 3,829 177.8 24.85 25.30 5.87 166.1 162.9 194.5 H40 15,940 9,780 87,020 60.3 15,939 54,168 862 29.08 29.76 6.91 164.4 160.8 194.5 J55 25,810 15,640 140,300 79.4 25,806 103,896 1,384 33.68 34.23 8.05 161.7 158.8 194.5 J55 30,080 22,540 162,500 79.4 30,084 126,096 1,990 101.6 30,080 138,972 1,994 33.68 34.23 8.05 161.7 158.8 194.5 PS80 43,750 26,480 236,210 101.6 43,740 196,248 2,335 38.19 38.69 9.19 159.4 156.2 194.5 J55 32,360 29,780 184,260 79.4 34,362 148,296 2,448 101.6 34,630 162,948 2,664 38.19 38.69 9.19 159.4 156.2 194.5 PS80 49,949 37,393 268,176 101.6 49,949 230,436 3,304 219.1 35.08 35.72 6.71 205.7 202.5 244.5 J55 20,360 9,440 169,160 76.2 20,355 108,336 832 40.21 41.67 7.72 203.6 200.5 244.5 J55 23,460 12,970 194,030 114.3 23,460 154,510 1,146 40.21 41.67 7.72 203.6 200.5 244.5 PS80 34,160 14,890 282,380 114.3 34,160 219,780 1,316 46.28 47.62 8.94 201.2 198.0 244.5 J55 27,113 17,454 223,332 85.7 27,113 165,168 1,542 114.3 27,113 185,148 1,542 244.5 46.18 48.07 7.92 228.6 224.7 269.8 H40 15,660 9,440 162,060 85.7 15,663 112,776 832 51.88 53.57 8.94 226.6 222.6 269.8 J55 24,290 13,920 250,410 85.7 24,290 174,936 1,232 120.7 24,290 201,132 1,231 51.88 53.57 8.94 226.6 222.6 269.8 PS80 35,230 16,350 364,080 120.7 35,230 286,380 1,445 57.95 59.53 10.03 224.4 220.4 269.8 J55 27,260 17,710 279,720 85.7 27,255 200,688 1,567 120.7 27,260 230,880 1,567 273.1 46.43 48.74 7.09 258.8 254.9 298.5 H40 12,560 5,790 162,948 69.9 12,558 91,020 536 57.86 60.27 8.89 255.3 251.3 298.5 J55 21,600 10,890 186,480 88.9 21,600 186,480 963 298.4 60.59 62.50 8.46 281.5 277.6 323.8 H40 13,660 7,380 212,232 88.9 13,660 136,308 652 67.81 69.94 9.53 279.4 275.4 323.9 PS80 30,839 11,245 475,968 88.9 30,839 297,480 994 Imperial Weight Pipe Body Data ST&C Connection LT&C Connection OD PE T&C Wall ID Drift Conn Grade Burst Collapse PE M/U Int. Joint Set M/U Int. Joint Set t OD Tens loss yield strength depth loss yield strength depth in. lb./ft. lb./ft. in. in. in. in. psi psi lbx1,000 in. psi lbx1,000 ft. in. psi lbx1,000 ft. 4 1/2 9.40 9.5 0.205 4.090 3.965 5.000 J55 4,380 3,310 152 2.000 4,380 101 6,620 10.23 10.5 0.224 4.052 3.927 5.000 J55 4,790 4,010 165 2.625 4,790 132 7,860 11.35 11.6 0.250 4.000 3.875 5.000 J55 5,350 4,960 184 2.625 5,350 154 8,300 3.000 5,350 162 8,730 11.35 11.6 0.250 4.000 3.875 5.000 PS80 7,780 6,360 267 3.000 7,780 263 12,720 5 1/2 13.70 14.0 0.244 5.012 4.887 6.050 J55 4,270 3,120 222 2.875 4,270 172 6,230 15.35 15.5 0.275 4.950 4.825 6.050 J55 4,810 4,040 248 2.875 4,810 202 8,070 3.500 4,810 217 8,070 15.35 15.5 0.275 4.950 4.825 6.050 PS80 7,000 4,990 362 3.500 7,000 306 9,980 16.87 17.0 0.304 4.892 4.767 6.050 J55 5,320 4,910 273 2.875 5,320 229 8,410 3.500 5,320 247 9,080 16.87 17.0 0.304 4.892 4.767 6.050 PS80 7,740 6,290 397 3.500 7,740 349 12,560 7 16.70 17.0 0.231 6.538 6.413 7.656 H40 2,310 1,450 196 2.375 2,310 122 2,830 19.54 20.0 0.272 6.456 6.331 7.656 J55 3,740 2,270 316 3.125 3,740 234 4,530 22.63 23.0 0.317 6.366 6.241 7.656 J55 4,360 3,270 366 3.125 4,360 284 6,530 4.000 4,360 313 4,320 22.63 23.0 0.317 6.366 6.241 7.656 PS80 6,340 3,840 532 4.000 6,340 442 7,660 25.66 26.0 0.362 6.276 6.151 7.656 J55 4,980 4,320 415 3.125 4,980 334 8,030 4.000 4,980 367 8,640 25.66 26.0 0.362 6.276 6.151 7.656 PS80 7,240 5,420 604 4.000 7,240 519 10,840 8 5/8 23.57 24.0 0.264 8.097 7.972 9.625 J55 2,950 1,370 381 3.000 2,950 244 2,800 27.02 28.0 0.304 8.017 7.892 9.625 J55 3,400 1,880 437 4.500 3,400 348 3,760 27.02 28.0 0.304 8.017 7.892 9.625 PS80 4,950 2,160 636 4.500 4,950 495 6,540 31.10 32.0 0.352 7.921 7.796 9.625 J55 3,930 2,530 503 3.375 3,930 372 5,060 4.500 3,930 417 5,060 9 5/8 31.03 32.3 0.312 9.001 8.845 10.625 H40 2,270 1,400 365 3.375 2,270 254 2,730 34.86 36.0 0.352 8.921 8.765 10.625 J55 3,520 2,020 564 3.375 3,520 394 4,030 4.750 3,520 453 4,040 34.86 36.0 0.352 8.921 8.765 10.625 PS80 5,120 2,370 820 4.750 5,120 645 4,740 38.94 40.0 0.395 8.835 8.679 10.625 J55 3,950 2,570 630 3.375 3,950 452 5,140 4.750 3,950 520 5,140 10 3/4 31.20 32.75 0.279 10.192 10.036 11.750 H40 1,820 880 367 2.750 1,820 205 1,760 38.88 40.5 0.350 10.050 9.894 11.750 J55 3,130 1,580 629 3.500 3,130 420 3,160 11 3/4 40.64 42.0 0.333 11.084 10.928 12.750 H40 1,980 1,070 478 3.500 1,980 307 2,140 45.57 47.0 0.375 11.000 10.844 12.750 PS80 4,470 1,630 1,072 3.500 4,470 670 3,260

EUE 73.0 x 5.5 R2 HFIW NOTES Joint strength is lesser of either the connection fracture or pull-out strengths, as determined by calculations per API Bulletin 5C3. All tensile, burst, and collapse ratings are based on minimum performance properties and do not include any safety factors. Safety factors should be included when determining working pressures and permissible tensile loads. The setting depth calculated is based on the minimum value determined by the collapse, burst, or joint strength limitations of the particular combination of size/weight/grade/connection. A collapse and burst gradient of 11.3kPa/m (0.50psi/ft.), or an equivalent mud weight of 1,000kg/m3 (9.625ppg) fresh water is assumed. In these calculations, a Safety Factor of 1.0 is used for burst and collapse, and a Safety Factor of 1.6 is used based on joint strength. If heavier mud weights or higher pressures are anticipated, the setting depth must be recalculated based on the expected loads. Bending loads from deviated wellbores and thermal stresses will affect both pipe body and connection ratings. In certain cases, the effects from bending or thermal effects can be substantial. Please contact Prudential Steel for specific case information. The use of Special Clearance connections can result in connection performance being downgraded. Please contact Prudential Steel for specific case information. The use of any casing grade in a sour environment may require the application of additional safety factors. Casing wear from subsequent drilling operations may require the application of additional safety factors. CASING STRING DESIGN A string of casing for a particular application is designed around the expected operating conditions.the operating conditions (internal and external pressure, tension) generate loads on the casing, and the casing string must be able to withstand these loads without failure.to perform a casing string design, the operational loads are compared to the minimum performance properties, and the parameters of the casing selected such that the minimum performance properties are greater than the expected loads. The designer must consider: the internal operating pressure against the casing s burst rating or the connection leak resistance; the external operating pressure against the casing s collapse resistance; and, the tensile loads, usually from the casing s own weight, against the joint strength.as pressures are commonly described as radients (kpa/m or psi/ft.) and the weight of the casing string is described as some mass per unit length (kg/m or lb./ft.), the operational loads at a given depth can be readily determined.alternately, actual values of the expected loads may be known and compared against the the tabulated minimum performance properties. The operational limits of the casing will be governed by one of the following: Joint strength either fracture or pull-out Collapse resistance Burst resistance or connection leak resistance Consequently, once the limiting operational condition is determined, the maximum operating depth of the casing string can be calculated based on that condition. The Setting Depths in the Casing Dimensional and Minimum Performance Data are calculated in this manner. In some instances, the operational limit of a specific size/weight/grade and connection combination is the collapse resistance, in others the burst, and in yet others, the joint strength.a depth corresponds to this limit, and that value is the Setting Depth. In all Setting Depth calculations for casing, a Safety Factor is accounted for in the tabulated values.the Safety Factors used are those commonly accepted by the Energy and Utilities Board in Alberta: 1.0 for Burst and Collapse; and, 1.6 for Tension.These Safety Factors provide for somewhat conservative Setting Depth values, since the calculations are based on the minimum not nominal performance properties of the casing. However, in certain situations, the designer may elect to use Safety Factors greater than those above. If there is a risk of casing wear for example, the designer may choose one weight heavier pipe to allow for the wear with no loss in burst or collapse, but the extra weight must be dealt with in the tensile calculations with the possible risk of the preferred weight/grade/connection combination being unsuitable. Further, in situations where high pressure stimulation treatments are expected, greater burst capability may be desired, and a higher grade or heavier weight of casing selected for the bottom section of the hole.additionally, if the risk of encountering H2S is great, the design may be modified so as to reduce the stress levels in the casing string by selecting higher grades or heavier weights. Finally, if the casing is to be run in a deviated wellbore or subjected to thermal recovery, the design must accommodate the loading extremes anticipated, and the Safety Factors adjusted accordingly. PRUDENTIAL STEEL CAN PROVIDE CASING STRING DESIGN ASSISTANCE IF NECESSARY,AND SUGGEST A STRING DESIGN WHICH WILL PROVIDE THE REQUIRED PERFORMANCE AND BEST ECONOMIC VALUE.

DIMENSIONAL & MINIMUM PERFORMANCE DATA S.I. TUBING x 5.21 R3 GRADE JSS 73 x 5.51 R2 114.3 Metric Weight Pipe Body Data NUE Connection EUE Connection OD PE NUE EUE Wall ID DriftGrade BurstCollapse PE Box M/U Int. Joint Set Box S/C M/U Int. Joint Set t Tens OD loss yield strength depth OD OD loss yield strength depth mm kg/m kg/m mm mm mm mm kpa kpa dan mm mm kpa dan m mm mm mm kpa dan m 60.3 6.60 6.85 6.99 4.83 50.7 48.3 J55* 53,084 55,800 31,850 73.0 41.3 53,430 21,960 3,277 77.8 73.9 49.2 53,430 31,850 4,651 73.0 9.17 9.52 9.67 5.51 62.0 59.6 J55 50,500 52,940 44,249 88.9 52.4 50,090 32,230 3,456 93.2 87.9 54.0 50,090 44,249 4,673 88.9 13.12 13.69 13.85 6.45 76.0 72.8 J55 48,200 51,000 63,252 108.0 58.8 48,230 48,560 3,624 114.3 106.2 60.3 48,230 63,252 4,670 114.3 18.25 18.79 19.01 6.88 100.5 97.3 J55 40,020 39,470 87,130 132.1 65.8 40,020 63,140 3,488 141.3 67.7 40,020 87,130 4,734 Imperial Weight Pipe Body Data NUE Connection EUE Connection OD PE NUE EUE Wall ID DriftGrade BurstCollapse PE Box M/U Int. Joint Set Box S/C M/U Int. Joint Set t Tens OD loss yield strength depth OD OD loss yield strength depth mm kg/m kg/m mm mm mm mm kpa kpa dan mm mm kpa dan m mm mm mm kpa dan m 2 3/8 4.43 4.6 4.7 0.190 1.995 1.901 J55 7,700 8,100 71,730 2.875 1.625 7,700 49,450 10,750 3.063 2.910 1.938 7,700 71,730 15,260 2 7/8 6.16 6.4 6.5 0.217 2.441 2.347 J55 7,260 7,680 99,660 3.500 2.063 7,260 72,580 11,340 3.668 3.460 2.125 7,260 99,660 15,330 3 1/2 8.81 9.2 9.3 0.254 2.992 2.867 J55 6,980 7,400 142,460 4.250 2.313 6,880 109,370 11,890 4.500 4.180 2.375 6,980 142,460 15,320 4 1/2 12.24 12.60 12.75 0.271 3.958 3.833 J55 5,800 5,720 198,030 5.200 2.592 5,800 143,500 11,440 5.563 2.664 5,800 198,030 15,530 * J55 grade refers to J55 API and J55 Modified. NOTES Setting depth calculations are based on minimum value determined by the collapse, burst, or joint strength limitations of a particular combination of size/weight/grade/connection, using minimum performance properties. A collapse and burst gradient of 11.3 kpa/m (0.50 psi/ft.), or an equivalent mud weight of 1,000 kg/m3 (9.925 ppg) fresh water is assumed. Setting depths, tensile ratings, burst ratings, and collapse ratings for tubing sizes do not include any safety factors. Safety factors should be included when determining working pressures and actual setting depth values. Joint strength and setting depth for Special Clearance coupling EUE connections is the same as for Standard OD coupling EUE connections. All tabulated values are minimum performance properties. Please contact Prudential Steel for information on Specialty connection products. ASSEMBLY TORQUE RECOMMENDATIONS API ST&C CASING RECOMMENDED ASSEMBLY TORQUE Nominal OD mm in. Weight kg/m lb./ft. Grade Minimum Nm ft. lb. Optimum Nm ft. lb. Maximum Nm ft. lb. 114.3 4 1/2 14.14 9.50 J55* 1,035 760 1,380 1,010 1,725 1,260 15.63 10.50 J55 1,340 990 1,790 1,320 2,240 1,650 139.7 5 1/2 20.83 14.00 J55 1,750 1,290 23,330 1,720 2,910 2,150 23.07 15.50 J55 2,050 1,520 2,730 2,020 3,410 2,530 177.8 7 25.30 17.00 H40 1,240 920 1,650 1,220 2,060 1,530 29.76 20.00 J55 2,380 1,760 3,170 2,340 3,960 2,930 219.1 8 5/8 35.72 24.00 J55 2,480 1,830 3,310 2,440 4,140 3,050 47.62 32.00 J55 3,780 2,790 5,040 3,720 6,300 4,650 244.5 9 5/8 48.07 32.30 H40 2,580 1,910 3,440 2,540 4,300 3,108 273.1 10 3/4 48.74 32.75 H40 2,090 1,540 2,790 2,050 3,490 2,560 60.27 40.50 J55 4,280 3,150 5,700 4,200 7,130 5,250 298.4 11 3/4 62.50 42.00 H40 3,130 2,300 4,170 3,070 5,210 3,850 * J55 grade refers to J55 API and J55 Modified.

GRADE PS80 60.3 x 4.83 R2 GRADE H40 API LT&C CASING RECOMMENDED ASSEMBLY TORQUE Nominal OD mm in. Weight kg/m lb./ft. Grade Minimum Nm ft. lb. Optimum Nm ft. lb. Maximum Nm ft. lb. 114.3 4 1/2 17.26 11.60 J55* 1,650 1,220 2,200 1,620 2,750 2,030 PS80 2,260 1,670 3,020 2,230 3,780 2,790 139.7 5 1/2 23.07 15.50 J55 2,210 1,630 2,940 2,170 3,680 2,710 PS80 3,050 2,250 4,070 3,000 5,080 3,750 25.03 17.00 J55 2,510 1,850 3,340 2,470 4,180 3,090 PS80 3,530 2,610 4,710 3,480 5,890 4,350 177.8 7 34.23 23.00 J55 3,180 2,350 4,240 3,130 5,300 3,910 PS80 4,490 3,320 5,990 4,420 7,490 5,530 38.69 26.00 J55 3,740 2,750 4,980 3,670 6,230 4,590 PS80 5,190 3,830 6,930 5,110 8,660 6,390 219.1 8 5/8 41.67 28.00 J55 3,540 2,610 4,720 3,480 5,900 4,350 PS80 4,940 3,640 6,590 4,860 8,230 6,070 47.62 32.00 J55 4,240 3,130 5,650 4,170 7,050 5,210 244.5 9 5/8 53.57 36.00 J55 4,600 3,400 6,140 4,530 7,680 5,660 PS80 6,440 4,750 8,600 6,340 10,740 7,920 59.53 40.00 J55 5,290 3,900 7,050 5,200 8,810 6,500 298.4 11 3/4 69.94 47.00 PS80 6,822 5,027 9,096 6,703 11,370 8,379 * J55 grade refers to J55 API and J55 Modified. NOTES Round thread connections are assembled to position the above values are representative of the assembly torques required under nominal conditions. Minimum torque is Optimum less 25%, and Maximum torque is Optimum plus 25%. Special Clearance connections will require lower assembly torque values. Please call Prudential for specific case information. These torque values are based on the use of a thread compound meeting the performance objectives of API 5A2.The use of alternate compounds may require adjusted values. Please call Prudential for specific case information. Above data taken from API Bulletin RP5C1, Recommended Practice for Care and Use of Casing and Tubing, Seventeenth Edition, November, 1994. For couplings equipped with PTFE seal rings, use 70% of the above values for assembly. If couplings are tin plated, use 80% of the above values for assembly. API NUE TUBING RECOMMENDED ASSEMBLY TORQUE Nominal OD mm in. Weight kg/m lb./ft. Grade Minimum Nm ft. lb. Optimum Nm ft. lb. Maximum Nm ft. lb. API EUE TUBING 60.3 2 3/8 6.85 4.60 J55* 750 550 990 730 1,230 910 73.0 2 7/8 9.52 6.40 J55 1,070 790 1,420 1,050 1,780 1,310 88.9 3 1/2 13.69 9.20 J55 1,490 1,100 2,010 1,480 2,510 1,850 114.3 4 1/2 18.79 12.60 J55 1,775 1,310 2,340 1,740 2,950 2,180 RECOMMENDED ASSEMBLY TORQUE Nominal OD mm in. Weight kg/m lb./ft. Grade Minimum Nm ft. lb. Optimum Nm ft. lb. Maximum Nm ft. lb. 60.3 2 3/8 6.99 4.70 J55 1,320 970 1,750 1,290 2,180 1,610 73.0 2 7/8 9.67 6.50 J55 1,680 1,240 2,230 1,650 2,800 2,060 88.9 3 1/2 13.85 9.30 J55 2,320 1,710 3,090 2,280 3,870 2,850 114.3 4 1/2 19.01 12.75 J55 2,910 2,150 3,880 2,860 4,850 3,575 * J55 grade refers to J55 API and J55 Modified. NOTES Data taken from API RP5C1, Recommended Practice for Care and Use of Casing and Tubing, Seventeenth Ed., November, 1994. Assembly for API connections is based preferably on position.the above torques are representative of the values expected to assemble connections under normal conditions. Minimum torque is Optimum less 25%, and Maximum torque is Optimum plus 25%. Prudential Steel also provides tubing with Specialty end finish connections. Please contact Prudential for information concerning recommended assembly torques for these products. For couplings equipped with PTFE seal rings, use 70% of the above values for assembly. For couplings that are tin plated, use 80% of the above values for assembly.

73 x 5.51 R2 ST + C NUE 114.3 x 5.21 R3 RUNNINGGUIDELINES

APIRPSCI GRADE PS80 EUE 60.3 x 4.83 R2 GRADE H40 SUMMARY PRUDENTIAL STEEL Check for appropriate accessories and sufficient pipe on location: Casing float equipment, crossovers, thread compound, centralizers, etc. Tubing packer, tubing hanger, flow control equipment, crossovers, etc. Check all related equipment for condition and correct sizing: slips, elevators, tongs, etc. Position pipe on racks to permit visual inspection Position accessories to permit visual inspection Remove pin and box protectors from pipe Drift pipe from box to pin end Clean and dry connections on pipe and accessories Visually inspect connections and pipe body where possible Tally pipe on racks and establish running order Apply running or storage compound as necessary Re-install thread protectors on all connections Move pipe to catwalk in preparation for picking up to rig floor Check power tong rig-up for alignment, calibration, etc. Check blocks/elevators for alignment over rotary Prepare thread compound on rig floor Establish make-up torques for all connections Repeat cleaning, inspection, and tallying operations as pipe is exposed on racks

GRADE H40 GRADE PS80 HANDLING AND RUNNING GUIDELINES CASING 60.3 x 4.83 R2 NOTE: The information in this section is taken from API RP 5C1, Recommended Practice for Care and Use of Casing and Tubing, Seventeenth Edition, November, 1994. It is intended to provide an overview of the field handling and assembly of casing products. Other information may be required, and the user is advised to obtain and review a copy of RP 5C1. This information is directed primarily at API connections, though some is applicable to Specialty connection products. In any event, if the casing is equipped with Specialty connections, refer to the manufacturer's Recommended Practice for handling and running. I UNLOADING Ensure that pipe racks are level and properly positioned to allow transfer of casing from the rack to the catwalk. Ensure that thread protectors are in place on all connections before unloading casing. Avoid rough handling of casing which might dent or damage in any fashion the pipe body or connections. Dents in the casing body can reduce collapse ratings and lead to failure in service. Do not unload casing by dropping joints onto the racks. Maintain control of the casing at all times by handling a small number of joints. Do not place hooks in the ends of casing. Joints should be slung from spreaders, evenly spaced along the joint. When rolling casing on the racks, do not allow joints to strike each other. Always leave thread protectors in place when the casing is being moved. Casing should be placed on level tumble racks or clean metal or wooden surfaces, free of any debris. II PREPARATION AND INSPECTION All casing and accessory equipment should be visually inspected before it is run in the hole.where possible, the function of accessory pieces should be confirmed before assembly. Any joints with obvious pipe body or connection damage should be laid aside and not run. Further, any accessory pieces which are questionable should not be used. The basic running order of the casing and accessories should be determined early, and the make/model/type of accessories verified. The size and condition of all related handling equipment should be checked thoroughly particularly, slips, elevators, back-up tongs, and power tongs. III RIG FLOOR EQUIPMENT The use of slip-type elevators for any length of casing string is strongly advised and the condition of the dies and the setting plate should be checked. Extra-long slips should be used for heavy casing strings or for critical service casing. Again, the dies must be clean and sharp, and all of the same size. Do not mix old or resharpened dies with new dies in either the slips or the elevators. The condition of the slip bushing must also be checked to ensure that the slips will fit properly and engage the casing evenly. NOTE: Slip and tong marks or gouges are injurious, and can result in failure of the casing in service. Properly fitting and well maintained equipment can greatly reduce the chance of damaging the casing. Check that the blocks are centered over the rotary table. If not, make the crew aware that the misalignment can result in difficulty when stabbing and spinning up connections. Check the rig-in of the power tongs, making sure that the tong back-up line is at right angles to the tongs, the tongs are level, are free to move and are at the correct height above the floor. Check the size and rating of the power tongs.the nominal size of the tongs should not be more than one size larger than the pipe being run (i.e. do not use 13-3/8" tongs to run 7" casing) and the tongs must be able to readily attain the maximum expected torque. Ensure that the power tongs are equipped with an accurate and reliable torque gauge either electronic or hydraulic, possibly equipped with a pressure activated dump valve. Check that the back-up tongs are level and do not interfere with the suspension or operation of the power tongs. IV RUNNING PREPARATION Remove pin and box protectors from casing and accessory pieces, and thoroughly clean the connections, removing all previously applied thread or storage compound. Inspect all connections, particularly noting any mechanical damage to the threads.while minor corrosion damage is of little concern, mechanical damage of the threads can lead to failures in service. If a connection is damaged or questionable, it should be laid aside. When inspecting the box connections, check to see that the couplings are made-up power tight. On round thread connections there should be no pin threads extending beyond the coupling face, and on Buttress connections, the coupling face should be even with the base of the triangle stamped on the pin member. All casing joints and accessory pieces should be drifted full-length with a standard API drift mandrel, from the box end to the pin end. Depending on circumstances, while it is preferable to drift casing on the racks, a rabbit may be used instead as the casing is pulled up through the V-door. With the thread protectors removed and the connections cleaned, tally the casing and accessory pieces by measuring the length from the face of the coupling to the point on the pin connection where the coupling stops when the connection is assembled power tight.the distance from the end of the pin nose to this point is referred to as the make-up loss.alternately, the total length of the joint can be measured, and the make-up loss subtracted from the overall length.tallies should be made to the nearest 0.01m. The cleaning, inspection, and tallying operations are repeated as each tier of casing is uncovered. Before the casing is moved to the catwalk, clean thread compound should be applied, and thread protectors must be replaced. Unless specified otherwise,api 5A2 type thread compounds should be used. Fresh compound should be used, the applicator brush must be clean and free of any debris, compound must be mixed well, and never thinned. Note that certain service applications (heavy oil thermal or extremely high pressure) may require use of a different compound. In no event are rotary shoulder (drill pipe or collar) compounds to be used.

x 5.21 R3 GRADE PS80 73 x 5.51 R2 114.3 When moving pipe from the racks to the catwalk, ensure that joints are not dropped or allowed to hit against other casing or rig equipment. Casing should be pulled up to the V-door with a choker, and then single joint elevators used to pull the casing joint into the derrick.thread protectors must be in place on both pin and box connections any time the pipe or accessories are moved. If it is impractical to replace all thread protectors, several can be cleaned and used repeatedly, being installed on the pipe rack and removed from the casing when hung in the derrick. If a mixed string is to be run (more than one grade and/or weight), ensure that sufficient pipe of the required type is available, and that it is laid out on the racks so that it will be accessible when called for in the program. V RUNNING CASING Once the casing has been pulled into the derrick, the pin end thread protector can be removed, thread compound applied (if required) and the joint stabbed. In stabbing the joint, lower the casing slowly to avoid connection damage, and ensure that the connection is aligned before starting rotation. For large casing, and if there is any misalignment of the blocks over the rotary, a man on the stabbing board can be of great assistance. If the casing does not stab correctly or jams, the pin should be picked up from the box, both connections cleaned, inspected, and repaired (remove any filings or wickers), thread compound re-applied, and the connection restabbed. Once the joint is stabbed, make-up can proceed, with the connection being spun up slowly initially, ensuring that the connection is not cross-threaded or jammed. API Round and Buttress connections are assembled to position; the assembly torque values provided are representative of the torque range required to attain the power-tight position based on nominal conditions, and must be used only as a guide.torque must relate to the make-up position, and as a result, the torques used in the field for a given connection can vary from those listed. A suggested procedure for casing make-up is as follows: 1. Assemble a number of connections (at least ten) from each particular manufacturer or mill lot on location to establish the torque required to attain the power tight position.the torque required to attain this position may or may not be Optimum as listed in API RP5C1, and the torque must be within the Minimum/Maximum range. For all weights and grades, the power tight position, in turns past hand tight, is: 4-1/2" to 7" (114.3 to 177.8mm) three turns; 7-5/8" (193.7mm) and larger three and one half turns, except 9-5/8" (244.5mm) and 10-3/4" (273.1mm) in grade P110, and 20" (508mm) in grade J and K55, which are four turns. 2. During the initial spin up of the connections, watch for any irregularities in the assembly (torque spikes, heat, etc.) as these may indicate dirty connections, damaged threads, cross threading, etc., which can compromise the connection's integrity. If the initial spin up is erratic, the assembly should be stopped, and the connection broken out, cleaned, and inspected. If no damage is obvious, the assembly can be repeated, but if the initial spin up is again erratic, the connection is suspect an should not be run.to reduce the risk of galling assembly speeds should be kept below 25 RPM. 3. As the assembly progresses, watch the position of the pin member last scratch relative to the coupling face, and monitor the torque. 4. The Optimum torque value suggested should provide for a complete make-up under nominal conditions, with the pin thread last scratch flush with the coupling face (the power tight position), plus or minus two turns. 5. If the pin thread last scratch is buried beyond the coupling face and Minimum torque has not been attained, the connection is suspect and should not be run. Conversely, if at Maximum torque the pin thread last scratch is not within three turns of the coupling face, the connection is suspect and should not be run. 6. If at Optimum torque several threads are still showing, the torque should be increased, up to Maximum, to see if the power tight position can be attained. 7. Once the ten or more connections are thus assembled a representative Optimum torque for that particular lot can be determined, and the balance of the connections run using this Optimum value. 8. Suspect connections should be broken out and laid down, and not rerun unless inspected and repaired.the mating box connection should be cleaned and inspected for damage after break-out. Note that when assembling the field connection, it is possible that the mill end of the connection will make up slightly.this does not suggest that the mill end is too loose, but rather that the field end torque applied is more than was used to assemble the mill end. Casing must be lowered carefully, first to avoid shock loads to the casing string, but also to prevent pressure surges which may damage downhole formations.the slips must not be set until all downward motion of the casing string has stopped. Great care should be exercised to ensure that the string does not spud the bottom of the hole the compressive loads can cause the string to buckle and/or connections to loosen with the subsequent risk of failure in service. Note that often there is a predetermined running order for casing and related accessories due to design criteria or downhole conditions. It is vital that this order be followed, and in the event that a specific joint of casing cannot be identified with respect to its weight or grade, the joint should not be run. VI POSSIBLE RUNNING PROBLEMS Some of the more common causes of problems encountered when running casing are: 1. Inadequate inspection of casing or connections prior to running. 2. Improper transportation, storage, and handling practices. 3. Ignorance of Recommended Practices for handling and running of casing. 4. Improper manufacture of accessory or repair facility produced connections. 5. Use of improperly manufactured couplings for replacement parts or additions. 6. Excessive spin up speeds for initial assembly. 7. Excessive or inadequate assembly torques applied. 8. Use of improper thread compound. 9. Use of poorly maintained equipment (slips, elevators, power tongs, etc.).

73 x 5.51 R2 114.3 x 5.21 R3 GRADE J HANDLING AND RUNNING GUIDELINES TUBING NOTE: The information in this section is taken from API RP 5C1, Recommended Practice for Care and Use of Casing and Tubing, Seventeenth Edition, November, 1994. It is intended to provide an overview of the field handling and assembly of tubing products. Other information may be required, and the user is advised to obtain and review a copy of RP 5C1. The information is directed primarily at API connections, though some is applicable to Specialty connection products. In any event, if the tubing is equipped with Specialty connections, refer to the manufacturer's Recommended Practice for handling and running. I UNLOADING Ensure that the pipe racks are level and properly positioned to allow transfer of tubing from the rack to the catwalk. Ensure that thread protectors are in place on all connections before unloading tubing. Avoid rough handling of tubing which might dent, bend, or damage in any fashion the pipe body or connections. Mechanical damage of the pipe is injurious, and can result in failure of the tubing in service. Particular care must be taken when handling tubing with an internal plastic coating. Do not unload tubing by dropping joints onto the racks or by allowing pipe to tumble from the transport. Maintain control of the tubing at all times by handling a small number of joints. Do not place hooks in the ends of the tubing. Joints should be slung from spreaders, evenly spaced along the joint. When rolling tubing on the racks, do not allow joints to strike each other. Always leave thread protectors in place when the tubing is being moved. Tubing should be placed on level tumble racks or clean metal or wooden surfaces, free of any debris. II PREPARATION AND INSPECTION All tubing and accessory equipment should be visually inspected before it is run in the hole.where possible, the function of accessory pieces should be confirmed before assembly. Any joints or accessories with obvious body or connection damage should be laid aside and not run. Any accessories which are questionable should not be used. The basic running order of the tubing and accessories should be determined early, and the make/model/type of accessories verified. The size and condition of all related handling equipment should be checked thoroughly. Particularly, slips or tubing spiders, back-up tongs, elevators, and power tongs. III RIG FLOOR EQUIPMENT While the use of slip-type elevators is preferred for any length of tubing string, their use is strongly recommended for long or heavy strings, and for Special Clearance and Specialty Connection equipped tubing. Check the elevator body, latch mechanism, links, and dies and setting plate if slip-type elevators are used.the elevators must close completely, and the latch engage properly for safety. If slips are used, ensure the dies are clean and sharp, and all of the same size. Do not mix old or resharpened dies with new dies in either the slips of the elevators. If a tubing spider is used, ensure it does not crimp the tubing when closed, and also that it releases completely to avoid gouging the tubing when lowering. Slips and elevators should be cleaned frequently during use to reduce the risk of slippage, and to ensure their correct function. The condition of the slip bushing must also be checked to ensure that the slips will fit properly and engage the tubing evenly. NOTE: Slip and tong marks are injurious, and can result in failure of the tubing in service. Properly fitting and well maintained equipment can greatly reduce the risk of damaging the tubing. Check that the blocks are centered over the rotary table. If not, make the crew aware that the misalignment can result in difficulty when stabbing and spinning up connections. Check the rig-in of the power tongs, making sure that the tong back-up line is at right angles to the tongs, the tongs are level, are free to move and are at the correct height above the floor. Check the size and rating of the power tongs.the nominal size of the tongs should not be more than one size larger than the tubing being run (i.e. do not use 7" tongs to run 3-1/2" tubing) and the tongs must be able to readily attain the expected maximum torque. Ensure that the power tongs are equipped with an accurate and reliable torque gauge either electronic or hydraulic, possibly equipped with a pressure activated dump valve. Check the size and condition of the back-up tongs.they must be sized properly, have clean and sharp die segments, and be in good repair to avoid damaging the tubing.the use of pipe wrenches as back-ups is not permissible under any circumstance. Check that the back-up tongs are level and do not interfere with the suspension or operation of the power tongs. IV TUBING PREPARATION Remove pin and box protectors from tubing and accessory pieces, and thoroughly clean the connections, removing all previously applied thread or storage compound. Inspect all connections, particularly noting any mechanical damage to the threads.while minor corrosion damage is of little concern, mechanical damage of the threads can lead to failures in service. If a connection is damaged or questionable, it should be laid aside. When inspecting box connections, check to see that the couplings are made up power tight. On pup joints and accessories, the couplings may be only spun on by hand, and may not have thread compound applied to the connection surfaces. On round thread connections, there should be no pin threads extending beyond the coupling face. All tubing joints and accessory pieces should be drifted full-length with a standard API drift mandrel, from the box end to the pin end.while it is preferable to drift the tubing on the racks, a rabbit may be used instead as the tubing is pulled up through the V-door. With the thread protectors removed and the connections cleaned, tally the tubing by measuring from the face of the coupling to the point on the pin connection where the coupling stops when the connection is assembled power tight.the distance from the pin nose to this point is referred to as the make-up loss. Alternately, the total length of the joint can be measured, and the make-up loss subtracted from the overall length.tallies should be made to the nearest 0.01m. The cleaning, inspection and tallying operations are repeated as each tier of tubing is uncovered.

GRADE PS80 60.3 x 4.83 R2 GRADE H40 Before the tubing is moved to the catwalk, clean thread compound should be applied, and thread protectors must be replaced. Unless specified otherwise, API 5A2 type thread compounds should be used. Fresh compound should be used, the applicator brush must be clean and free of any debris, compound must be mixed well and never thinned. Note that certain service applications (heavy oil thermal or extremely high pressure) may require use of a different compound. In no event are rotary shoulder (drill pipe or drill collar) compounds to be used. When moving pipe from the racks to the catwalk, ensure that joints are not dropped or allowed to hit against other tubing or rig equipment.tubing should be pulled up to the V-door with a choker, and then elevators used to pull the tubing joint into the derrick.thread protectors must be in place on both pin and box connections any time the pipe or accessories are moved. If it is impractical to replace all thread protectors, several can be cleaned and used repeatedly, being installed on the pipe rack and removed from the tubing when hung in the derrick. If a mixed string is to be run (more than one grade and/or weight), ensure that sufficient pipe of the required type is available, and that it is laid out on the racks so that it will be accessible when called for in the program. V RUNNING TUBING Once the tubing has been pulled into the derrick, the pin end thread protector can be removed, thread compound applied (if required) and the joint stabbed. In stabbing the joint, lower the tubing slowly to avoid connection damage, and ensure that the connection is aligned before starting rotation. A man on the stabbing board can be of great assistance, particularly if any misalignment of the blocks over the rotary exists. Care should be taken when running tubing in stands of doubles or triples as the pipe may bow when the connections are stabbed, resulting in misalignment. If the tubing does not stab correctly or jams, the pin should be picked up from the box, both connections cleaned, inspected, and repaired (remove any filings or wickers), thread compound re-applied, and the connection re-stabbed. Once the joint is stabbed, make-up can proceed, with the connection being spun up slowly initially, ensuring that the connection is not cross-threaded or jammed. API Round thread connections are assembled to position; the assembly torque values provided are representative of the torque range required to attain the power-tight position based on nominal conditions, and must be used only as a guide.torque must relate to the make-up position, and as a result, the torques used in the field for a given connection can vary from those listed. A suggested procedure for tubing make-up is as follows: 1. As the nominal power tight position for Round thread tubing connections is two turns past the hand tight position, it is advisable to assemble a number of connections (at least ten) from each particular manufacturer or mill lot on location to establish the torque required to attain this position.the torque required to attain this position may or may not be Optimum as listed in API RP5C1, and the torque must be within the Minimum/Maximum range. 2. During the initial spin up of the connections, watch for any irregularities in the assembly (torque spikes, heat, etc.) as these may indicate dirty connections, damaged threads, cross threading, etc., which can compromise the connection's integrity. If the initial spin up is erratic, the assembly should be stopped, and the connection broken out, cleaned, and inspected. If no damage is obvious, the assembly can be repeated, but if the initial spin up is again erratic, the connection is suspect and should not be run.to reduce the risk of galling assembly speeds should be kept below 25 RPM. 3. As the assembly progresses, watch the position of the pin member last scratch relative to the coupling face, and monitor the torque. 4. The Optimum torque value suggested should provide for a complete make-up to the power tight position under nominal conditions. 5. If the pin thread last scratch is buried beyond the coupling face and Minimum torque has not been attained, the connection is suspect and should not be run. Conversely, if at Maximum torque the pin thread last scratch is not within two turns of the coupling face, the connection is suspect and should not be run. 6. If at Optimum torque several threads are still showing, the torque should be increased, up to Maximum, to see if the power tight position can be attained. 7. Once the ten or more connections are thus assembled a representative Optimum torque for that particular lot can be determined, and the balance of the connections run using this Optimum value. 8. Suspect connections should be broken out and laid down, and not rerun unless inspected and repaired.the mating box connection should be cleaned and inspected for damage after break-out. Note that when assembling the field connection, it is possible that the mill end of the connection will make up slightly. This does not suggest that the mill end is too loose, but rather that the field end torque applied is more than was used to assemble the mill end. Tubing must be lowered carefully, first to avoid shock loads to the tubing string, but also to prevent pressure surges which may damage downhole formations.the slips must not be set until all downward motion of the tubing string has stopped. Great care should be exercised to ensure that the string does not spud the bottom of the hole or any downhole equipment the compressive loads can cause the string to buckle and/or connections to loosen with the subsequent risk of failure in service. Note that often there is a predetermined running order for tubing and related accessories due to design criteria or downhole conditions. It is vital that this order be followed, and in the event that a specific joint of tubing cannot be identified with respect to its weight or grade, the joint should not be run. VI POSSIBLE RUNNING PROBLEMS Some of the more common causes of problems encountered when running tubing are: 1. Inadequate inspection of tubing or connections prior to running. 2. Improper transportation, storage, and handling practices. 3. Ignorance of Recommended Practices for handling and running of tubing. 4. Improper manufacture of accessory or repair facility produced connections. 5. Use of improperly manufactured couplings for replacement parts or additions. 6. Excessive spin up speeds for initial assembly. 7. Excessive or inadequate assembly torques applied. 8. Use of improper thread compound. 9. Use of poorly maintained equipment (slips, elevators, power tongs, etc.).