Supply of Tubing Head Assembly
Reference: SSG0635P16/05 3/18/2016, Location: Asia
Category: Gate Valves
Scope of Work
The company invites bids for the supply of spool, 179.4 mm (7.1/16") x 704 kg./sq.cm (10,000 psi) top flange, 279 mm (11") x 704 kg./sq.cm.(10,000 psi) bottom flange Tubing Head Assembly, 704 Kg/Sq.cm (10000 psi) Working pressure, with 179.4 mm (7.1/16") x 704 Kg/Sq.cm (10000 psi) WP top flange, and 279.4 mm (11") x 704 Kg/Sq.cm (10000 psi) WP bottom flange, as per API specification 6A, latest edition, comprising of the following items:
* 1(a) Tubing Head Spool: (Qty. 1 no. per set) Tubing Head Spool shall be Straight Bore Bowl design with a landing shoulder to accept mandrel type tubing hanger. The tubing head spool shall be designed conforming to API Std. 6A latest edition, with the following minimum requirements & provisions.
- Material: Minimum 60 K API forged steel
- Product specification level: PSL 3
- Material Class: AA
- Temperature Rating: U
- Working pressure: 704 Kg/Sq.cm (10,000 psi)
- Test Pressure: 1056 Kg/Sq.cm (15,000 psi)
- Minimum ID of the spool: 17.30 cm (6 13/16")
- Casing Size: Both 5 ½" & 7" Casing, by changing removable type bit pilot & secondary seal assembly.
The tubing head spool shall be furnished with the followings:-
- 1(a)(i) Top Connection of tubing head spool:
Flanged, 179.4 mm (7.1/16"), BX-156 ring grooved, 704 Kg/Sq.cm (10,000 psi) Working Pressure. Suitable to accommodate the tubing hanger [item 1(d)] and complete with Tie-down Screws to hold the tubing hanger in place.
- 1(a)(ii) Side Connection of tubing head spool:
Studded, 52.4 mm (2.1/16"); BX-152 ring grooved, 704 Kg/Sq.cm (10,000 psi) Working Pressure, two numbers on diametrically opposite side (180 Degree apart). Both side outlets shall be internally threaded with 38.1 mm (1.1/2") LP threads for installing valve removal plug.
- 1(a)(iii) Bottom Connection of tubing head spool:
Flanged, 279.4 mm (11"); BX-158 ring grooved, 704 Kg/Sq.cm (10,000 psi), Working Pressure. Suitable to accommodate removable type Bit Pilot / Bit Guide [item 1(b)] and Secondary Seal Assembly [item 1(c)]. Preparation shall be such that the Bit Pilot / Bit Guide is held in place by snap/retainer rings, and Secondary Seal Assembly sits in the counter bore properly. Preparation shall have testing port facilities of 12.7 mm (1/2") NPT thread profile, and requisite internal check valve, inner plug & outer plugs installed.
* 1(b) Bit Pilot/Guide (for 5 ½" OD casing):
(Qty. 1 no. per set) Removable type bit pilot to be used in conjunction with secondary seal assembly [item 1(c)] for installation in tubing head spool [item 1(a)] and held in place by snap/retainer ring. The bit pilot shall be such that it prevents casing & secondary seal assembly from getting damaged during running-in of any down hole tools.
* 1(c) Secondary Seal Assembly (for 5 ½" OD casing):
(Qty. 1 no. per set) Removable, self energised (pressure actuated) type, secondary seal assembly, 704 Kg/Sq.cm (10,000 psi) W.P to suit bottom preparation of tubing head spool [item 1(a)] and to seal off 139.7 mm (5.1/2") OD casing.
* 1(d) Tubing Hanger:
(Qty. 1 no. per set) Tubing hanger, single completion suspended mandrel type, with extended seal necks complete with additional upper seal ring to be energised by pack off adapter flange [item no 1(e)], and complete with lower seal ring to be energised by the tubing weight. Tubing hanger shall be made of forged alloy steel (Minimum 60 K API material), with bottom threads to hang 73.03 mm (2.7/8") OD VAM TOP tubing, and top thread 73.03 mm (2.7/8") OD VAM TOP thread for lifting, and suitable for above tubing head spool [item 1(a)]. The tubing hanger shall also be provided with 2.1/2" Nom. thread for installing back pressure valve. The minimum ID of the tubing hanger shall be equal to or more than the tubing ID i.e. 2.441".
* 1(e) Pack off Adapter Flange (for 10M XMT):
(Qty. 1 no. per set) Pack off Adapter Flange, suitable for mounting on above tubing head spool [item 1(a)] & fit over extended neck tubing hanger [item 1(d)]. The pack off adapter flange shall be designed as below-
- 1(e)(i) Top Connection of Pack off Adapter Flange: Studded, 65.09 mm (2.9/16"), BX-153 ring grooved, 704 Kg/Sq.cm (10,000 psi), Working Pressure. The top of the vertical bore shall be suitably chamfered to guide wire line tool.
- 1(e)(ii) Bottom Connection of Pack off Adapter Flange: Flanged, 179.4 mm (7.1/16"), BX-156 ring grooved, 704 Kg/Sq.cm (10,000 psi) Working Pressure. Bottom flange shall be provided with test port facility with internal check valve & plug.
* 1(f) Casing Valves:
(Qty 02 nos. per set) Gate Valves, forged Steel, 52.39 mm (2.1/16"), 704 Kg./Cm. Sq. (10000 psi) working pressure, flanged end, BX 152 ring grooved, full bore through conduit, complete with hand wheel, and one no. installed in each side outlet of tubing head spool [item 1(a)]. The Gate Valve shall have replaceable gate and seat assembly, parallel solid slab gate construction with floating seat, back seat arrangement on the stem, non-rising stem supported on two thrust bearings, with plastic packing and grease injection ports.
* 1(g) Studs & Nuts:
- 1(g)(i) Stud 1.1/2" dia. x 13.3/4" long, with 2 hexagonal nuts each.: (Qty. 16 nos per set)
- 1(g)(ii) Stud 1.3/4" dia. x 15.3/8" long, with 2 hexagonal nuts each.: (Qty. 16 nos per set)
* 1(h) Ring Joint Gaskets:
- 1(h)(i) Ring joint Gasket, Size BX 152 : (Qty. 02 nos per set) (In installed condition with casing valves)
- 1(h)(ii) Ring joint Gasket, Size BX 153 : (Qty. 01 no per set)
- 1(h)(iii) Ring joint Gasket, Size BX 156 : (Qty. 01 no per set)
- 1(h)(iv) Ring joint Gasket, Size BX 158 : (Qty. 01 no per set)
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