Test joint

Abstract

The invention relates to a test joint which comprises an upper joint, a lower joint and a testing instrument pipe string, wherein an upper wire protection cover is arranged outside the upper end of the upper joint in a sleeving manner, and the lower end of the upper joint is connected with the lower joint; the upper end of the lower joint is hermitically connected outside the lower end of the upper joint in a sleeving manner; a lower wire protection cover is hermitically arranged outside the lower end of the lower joint in a sleeving manner; a screwed plug is mounted and arranged on one side of the upper end of the lower joint; a detection hole is obliquely formed in the outer wall of one side of the upper end of the lower joint; union covers are arranged on the outer side of a connection part of the upper joint and the lower joint and the outer side of a connection part of the lower joint and the lower wire protection cover in a sleeving manner; clamping tiles are mounted between the union covers and the upper and lower joints; the radial directions and the axial directions of the clamping tiles and the lower union covers are fixed by fasteners; the testing instrument pipe string comprises a quick joint, a needle valve, a tee joint and a pressure gauge which are connected with one another. The test joint is convenient to mount and detach and is convenient to operate and use; after the test joint is reassembled, the sealing property can be quickly tested; the on-site tool string running time is saved; the potential safety hazard is reduced; the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of ground equipment for steel wire and cable operations, in particular to a test joint that is convenient and quick to disassemble and can quickly test the sealing performance after reassembly. Background technique [0002] The characteristic of steel wire and cable operation is that it is operated under pressure. Whether the seal is intact is very important. Often during the operation, it is necessary to disassemble the wellhead control equipment close to the ground and lower it into the steel wire and cable tool. Nozzle and blowout preventer connection), frequent disassembly will damage the rubber seal, because other wellhead control equipment (blowout preventer or blowout preventer) cannot realize the function of self-testing sealing performance after disassembly and assembly, tools After being lowered and reassembled, the sealing performance cannot be guaranteed to be intact, so there is a potential safe...

AI Technical Summary

Problems solved by technology

Common steel wires and cables do not have test joints before on-site operation. When it is necessary to run the steel wire and cable tool string, you can only disassemble the connection between the blowout preventer and the blowout preventer. After the device is reconnected, it starts to work. It is possible that the sealing ring of the disassembly part is damaged during the disassembly process, but the operator cannot detect it. This requires a lot of manpower and material resources, and it also wastes time to check which part is leaking. The test joint is to save a lot of money. Inspection and test time for pressure test, if there is no test joint, it will not be possible to accurately and quickly check which link has leakage. If the problematic sealing rubber parts cannot be replaced in time, and the operation is performed directly without testing, pressure leakage may occur , unable to carry out normal operations, and may even cause safety accidents

[0003] like Figure 4-5 As shown, there is no test joint. When the steel wire and cable tool string needs to be lowered in the wellhead wireline operation / cable operation, it is necessary to frequently disassemble the wellhead control equipment (usually at the junction A of the blowout preventer 1 and the blowout preventer 2). , Frequent disassembly will damage the rubber seal. After the tool is lowered, A will be reassembled. Frequent disassembly will make it impossible to correctly judge whether the sealing performance of A is intact. None of them can realize the function of self-testing the sealing performance after disassembly and assembly. After the tool is put in and reassembled, the sealing performance cannot be guaranteed to be still intact, so there are potential safety hazards

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