D DD(TA) Center Latch Tubing Elevator
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1.Description:
⑴DD(TA) Center Latch Tubing Elevators are convention square center latch elevators to handle pipes in oil and gas drilling operation.
⑵DD(TA) 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 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
To use DD(TA) Center Latch Tubing Elevators, pull outward the shield, the upper slope of 45º separate from the body it attached, and pull outward on, the latch can separate from the latch cam of the other body, and then the elevator is opened for operation. To use the type 2 elevator, pull outward the handle of the latch lock, the hook separate from the lock pin with the force of small wrench spring, and pull outward on, the latch can separate from the latch cam of the body, and then the elevator is opened for operation. When close the elevator, grasp the two handle of the two halves body and pull them together, the latch will automatically hook the latch cam, or the shield will press latch or latch lock will hook the hook pin, the elevator will be closed and locked tightly. Then the operation of ascending or descending can be carried out.
3.Specifications for DD(TA) Center Latch Tubing Elevators
Chart for specifications of DD(TA) 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 | ||
| DD2⅜(63) | 62.31 | 62.31 | 2⅜ | 60.33 | - | |
| DD2⅜EU(63*69) | 68.66 | 62.31 | 2⅜EU | 62.31 | 65.89 | |
| DD2⅞(75) | 75.01 | 75.01 | 2⅞ | 73.03 | - | |
| DD2⅞EU(75*82) | 81.36 | 75.01 | 2⅞EU | 73.03 | 78.59 | |
| DD3½(91) | 90.88 | 90.88 | 3½ | 60.33 | - | |
| DD3½EU(91*98) | 98.02 | 90.88 | 3½EU | 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 | |
| DD4½(117) | 116.66 | 116.66 | 4½ | 114.30 | - | |
| DD4½EU(117*123) | 123.42 | 116.66 | 4½EU | 114.30 | 120.65 | |
| Note:1. IU means internal upset tubing. | ||||||