Metal-to-metal sealing tieback connector
A metal seal and metal seal ring technology, applied in the field of offshore oil and gas drilling, can solve the problems of high operating costs and increased development costs of oil and gas wells, and achieve the effects of saving development costs, compact connection structure, and simplifying the opening process
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[0022] Example 1: Take a 339mm (13 3 / 8 ") is an example of a metal-to-metal sealing connection tool, and the present invention will be further described in detail.
[0023] Refer to figure 1 . The metal-to-metal sealing return connector of the present invention includes a return connector body 1, a gravity lock ring 3, a rubber sealing ring 6, an upper metal sealing ring 7, a lower metal sealing ring 8, a shear nail 10 and a sealing ring base 11 .
[0024] The return connector body 1 is cylindrical, and the upper end of the return connector body 1 is provided with an internal thread, which can be connected with the external thread at the lower end of the return pipe string. The uppermost end of the return connector body 1 has 339mm (13 3 / 8 ″) Casing taper thread, can be matched with 339mm(13 3 / 8 ") Connect the lower end of the tie-back tubing string. The metal-to-metal sealed tie-back connector is run through the tie-back tubing string to the casing hanger in the subsea well...
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