DDD(AA) Center Latch Tubing Elevator
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1.Description
⑴DD(AA) Collar type Center Latch Tubing Elevators are convention square center latch elevators to handle pipes in oil and gas drilling operation.
⑵DD(AA) Collar type Center Latch Tubing Elevators are made from high quality alloy steel with both advanced technology and heat treatment. The elevators are verified by strength test and NDT referred to ANSI/ASTM A487. The elevators can handle taper shoulder tubing from 1.9in to 4 1/2EU O.D. at the temperature minus 20℃. The rating loads are as follows: 65t(585kN),100t(900kN), 125t(1125kN),150t(1350kN) and etc.
⑶The sizes of contact surface between elevator and elevator link or between elevator and pipes conform to the specifications of Principal Contact Surface Size for Hoisting Equipment in SY/T 5288 and API Spec 8C.
⑷Center Latch Tubing Elevators have been strictly Volumetric Radiographic Tested and Surface NDE and Verification tested and Ex-work tested, every technical parameters and properties of the equipment offered to customers are in accordance with the specifications of API Spec 8C and SY/T 5035 Elevator link, Elevator and Manual Tong.
2.Structuarl Principle
DD(AA) Collar type Center Latch Tubing Elevators Series are constructed in two halves of bodies, latch,, latch pin, hinge pin, and other spare parts. The two bodies are hinged by hinge pin; the latch is jointed to one body by latch pin and can be rotated around it. The wrench spring is fixed to the latch and can be functioned as restoring. Latch pin and hinge pin are retained by snap spring, which is easy for assemble for disassemble. Shield and wrench spring of type 1 elevator are stationed on latch by shield pin, and the shield can be used to close or open elevator with the force of wrench spring. Latch lock and wrench spring elevator are stationed on the latch by bolt. With the force of wrench spring, the latch lock can hook the lock pin of to close the elevator safely. Every elevator has been equipped with two link blocks at both end, such can prevent the elevator fall off from elevator link in lifting operation.
3.Specifications for DD(AA) Collar type Center Latch Tubing Elevators
Chart for specifications of DD(AA) Collar type Center Latch Tubing Elevator:
| Specification | Bore Dia(mm) | Tubing O.D. | Rating
load ton（kN） |
|||
|
upper bore |
lower bore | Spec(in) | Size(mm) | Botteneck O.D.(mm) | ||
| DD1.9(63*69) | 50.39 | 50.39 | 1.9 | 48.26 | - |
100t(900kN) 150t(1350kN) 250t(2250kN) 350t(3150kN) 500t(4500kN) |
| DD1.9EU(63*69) | 55.96 | 50.39 | 1.9EU | 50.39 | ||
| DD2 3/8(63) | 62.31 | 62.31 | 2 3/8 | 60.33 | - | |
| DD2 3/8EU(63*69) | 68.66 | 62.31 | 2 3/8EU | 62.31 | 65.89 | |
| DD2 7/8(75) | 75.01 | 75.01 | 2 7/8 | 73.03 | - | |
| DD2 7/8EU(75*82) | 81.36 | 75.01 | 2 7/8EU | 73.03 | 78.59 | |
| DD3 1/2(91) | 90.88 | 90.88 | 3 1/2 | 60.33 | - | |
| DD3 1/2EU(91*98) | 98.02 | 90.88 | 3 1/2EU | 88.90 | 95.25 | |
| DD4(104) | 103.58 | 103.58 | 4 | 101.60 | - | |
| DD4EU(104*111) | 110.72 | 103.58 | 4EU | 101.60 | 107.95 | |
| DD4 1/2(117) | 116.66 | 116.66 | 4 1/2 | 114.30 | - | |
| DD4 1/2EU(117*123) | 123.42 | 116.66 | 4 1/2EU | 114.30 | 120.65 | |
| Note:IU means internal upset tubing. | ||||||