COSCO WELLHEAD CONNECTOR SYSTEMS For Electrical Submersible Pumping Systems

Transcription

1 COSCO WELLHEAD SYSTEMS For Electrical Submersible Pumping Systems CANADIAN OILWELL SYSTEMS COMPANY LTD.

2 INTRODUCTION COSCO offers a complete line of rugged Electric Feed-through Systems for wellheads used in Electrical Submersible Pump Applications. COSCO connector systems represent the utmost in reliability, simplicity, versatility, and convenience. They are adaptable to any application, onshore or offshore under any condition. RELIABILITY The lower connector is the key to the reliability of COSCO Connector Systems. Its unique design eliminates the need for a connection in the annulus, thereby eliminating a weak spot. Corrosion resistant stainless steel is used for the housing and flange of the connector, while the compound used to insulate the electric conductors and provide the pressure seal inside the body of the connector is not susceptible to swelling or breakdown caused by wellbore fluids. The unique construction of the connector includes a Torlon face block to protect against pressure damage. EASE OF INSTALLATION The lower connector bolts to the bottom of the tubing hanger by means of a flange. The upper connector bolts to the top of the tubing hanger and the connection between the upper and lower connectors is made within the electrical connection port of the tubing hanger. The lower connector pigtail is spliced to the down hole power cable. No special tools are required for installation. VERSATILITY Several different configurations are available to meet any need: Two-piece 90-degree top entry Three-piece 90-degree top entry Side entry systems Fail safe systems A variety of pigtail cable types and sizes are available to meet any application or service. LOW PROFILE DESIGN All COSCO connector systems allow a lower profile tree assembly. The side entry system is specifically designed for applications where low tree profiles are critical, such as offshore applications. EXISTING WELLHEADS COSCO connectors can be installed in most existing wellhead equipment to convert for use with submersible pumps or to replace other types of electric feed-through systems.

3 TOP ENTRY SYSTEMS Top entry connector systems are used to convert existing wellheads for use with electrical submersible pumps or to replace existing electric feed-through systems. COSCO Universal tubing head adapters also use the top entry system. HANGER TWO PIECE 90-DEGREE TOP ENTRY ELECTRICAL SYSTEM The two piece, top entry system is used where a tubing adapter (bonnet) is not required. It consists of: 1. A 90-degree upper connector, and 2. A lower connector The lower connector bolts to the bottom of the tubing hanger and the upper connector bolts to the top of the tubing hanger. The connection between the two connectors is made within the electrical connection port of the tubing hanger. In this configuration, the tubing hanger remains exposed in the top of the tubing head spool. To convert existing wellheads to the two piece, top entry system, it is required to change out the tubing hanger. O-RING GUIDE LOWER

4 THREE PIECE 90-DEGREE TOP ENTRY ELECTRICAL SYSTEM The three piece, top entry system is used where a tubing adapter (bonnet) is required. In addition to the upper and lower connectors, a transmission element is used to provide the required extra length to extend through the bonnet. OPTIONAL FLANGED OUTLET To convert existing wellheads to the three piece, top entry system, it is required to change out the tubing hanger and bonnet. TORLON FACE BLOCK PROVIDES RIDGID CONNECTION AND PROTECTS AGAINST PRESSURE DAMAGE SOLID COPPER CONTACT PINS TRANSITION SLEEVE HEAD ADAPTOR FLANGE: 1. ROTATING FLANGE 2. BONNET HANGER RING GASKET LOCK-DOWN SCREWS SPOOL FACE SEAL O-RING PROVIDES MAIN PRESSURE SEAL TWO STATIC O-RINGS PROVIDE BACKUP PRESSURE SEAL TRANSMISSION ELEMENT LOWER

5 DEFORMABLE FILLER MATERIAL 318 L STAINLESS STEEL HOUSING AND JACKET PROVIDES CORROSION RESISTANCE ROUND CABLE PIGTAIL 25 FT. STANDARD LENGTH STAINLESS STEEL BOLTS TO TOP OF HANGER (FOUR) O-RINGS PROVIDE MOISTURE PROTECTION SOLID COPPER PINS WITH MULTILAM INSERTS, ENHANCE CONNECTIONS SOLID COPPER CONTACT PINS TORLON FACE BLOCK PROVIDES DURABLE NOSING UPPER SEAL RETAINING PLATE TORLON FACE BLOCK PROVIDES RIDGID CONNECTION AND PROTECTS AGAINST PRESSURE DAMAGE TWO STATIC O-RINGS PROVIDE BACKUP PRESSURE SEAL FACE SEAL O-RING PROVIDES MAIN PRESSURE SEAL LOWER 318 L STAINLESS STEEL HOUSING AND JACKET PROVIDES CORROSION RESISTANCE STAINLESS STEEL BOLTS TO BOTTOM OF HANGER (FOUR) LOOSE FLANGE (RETAINED BY SNAP- RING) ALLOWS ORIENTATION OF BEFORE HOOKUP DEFORMABLE FILLER MATERIAL ORIENTATION MARKER PIGTAIL: CABLE TYPE AND SIZE DETERMINED BY WELLBORE ENVIRONMENT AND BOTTOMHOLE EQUIPMENT, 15 FT. STANDARD LENGTH, ROUND OR FLAT CABLE

6 COSCO UNIVERSAL HEAD ADAPTERS The COSCO Universal tubing head adapters are designed to install on top of existing wellhead equipment to convert for use with submersible pumps. Four types of adapters are available in a variety of sizes. All are configured for a top entry electrical system. Type SA Universal Adapter Type FA Flanged Universal Adapter Spools Type A Flanged Universal Adapter Spools COSCO SAPA Packoff Tubing Head Adapter TYPE SA UNIVERSAL ADAPTERS OPTIONAL FLANGED OUTLET UPPER CAP HANGER LOWER NOTES: 1. Specify flat or round lower pigtail cable. 2. The upper cap is 8-5/8 RD thread suitable for a BOP adapter. 3. Standard cable conductor size #4 AWG. Other sizes available on request. TYPE SA HEAD ADAPTER WITH 2 PIECE 90-DEGREE TOP ENTRY ELECTRICAL SYSTEM

7 TYPE FA FLANGED UNIVERSAL ADAPTER SPOOLS FA adapters are designed for ease of BOP installation. HANGER LOCK-DOWN SCREWS SPOOL LOWER NOTES: 1. Allow use of 3-1/2 tubing. 2. Upper flange complete with 4 lockscrews. 3. Standard adapters do not have side outlets. Side outlets are available in threaded or studded configuration. Specify size and type of side outlets, when ordering. 4. Specify round or flat lower pigtail cable. 5. Standard cable conductor size #4 AWG. Other sizes available on request. TYPE FA HEAD ADAPTER SPOOL WITH 2 PIECE 90-DEGREE TOP ENTRY ELECTRICAL SYSTEM

8 TYPE A FLANGED UNIVERSAL ADAPTER SPOOLS Type A adapter spools are used in conjunction with 3-piece electrical systems when a tubing adapter (bonnet) is required. When ordering, specify: 1. Adapter spools part number or size. 2. Tubing adapter (bonnet) style. (threaded or flanged upper tubing connection) OPTIONAL FLANGED OUTLET LOCK-DOWN SCREWS HEAD ADAPTOR FLANGE: 1. ROTATING FLANGE 2. BONNET HANGER RING GASKET SPOOL NOTES: 1. Allow use of 3-1/2 tubing. 2. Upper flange complete with 4 lockscrews. 3. Standard adapters do not have side outlets. Side outlets are available in threaded or studded configuration. Specify size and type of side outlets, when ordering. 4. Specify round or flat lower pigtail cable. 5. Standard cable conductor size #4 AWG. Other sizes available on request. 6. Unique bonnet configuration does not require alignment slot for tubing hanger. 7. SPECIFY FLANGED OR THREADED UPPER CONNECTION ON BONNET. TYPE A HEAD ADAPTER SPOOL WITH 3 PIECE 90-DEGREE TOP ENTRY ELECTRICAL SYSTEM

9 COSCO SAPA PACKOFF HEAD ADAPTER HAMMER NUT CLAMPING BOLTS UPPER CLAMPING PLATE UPPER SEAL RETAINING PLATE ESP ROUND CABLE RUBBER SEAL ELEMENTS LOWER SEAL RETAINING PLATE 2-3/8 OR 2-7/8 MANDRIL HANGER LOWER SUPPORT PLATE 7-1/ /3000# UNIVERSAL SPOOL