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Hydrostatic pressure testing device for underwater wellhead

A test device and technology of underwater wellhead, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problems such as the hydrostatic pressure test device of the wellhead body that has not yet been seen, and achieves simple and reliable structure and reduces unit costs. To the total force area, the effect of long service life

Active Publication Date: 2013-11-27
KINGDREAM PLC CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no report on the hydrostatic pressure test device of the well head body

Method used

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  • Hydrostatic pressure testing device for underwater wellhead
  • Hydrostatic pressure testing device for underwater wellhead
  • Hydrostatic pressure testing device for underwater wellhead

Examples

Experimental program
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Embodiment Construction

[0021] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] The first example is figure 1 , 3 , 4, including a sealing end cover 1 and a sealing mandrel 2, the sealing end cover is provided with a stepped through hole, the upper end of the stepped through hole is provided with a screw hole configured with the mandrel, and the upper end of the screw hole is provided with an upper hole shoulder Open a sealing groove on the upper end surface of the sealing mandrel to set the sealing ring 8 and the end face sealing configuration of the shoulder on the sealing end cover, open a sealing groove under the thread on the upper end of the sealing mandrel to install the sealing ring 9 and under the screw hole of the sealing end cover The sealing configuration of the sealing hole constitutes the upper sealing structure. The annular cavity between the above two sealing rings communicates with the sea...

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Abstract

The invention relates to a hydrostatic pressure testing device for a body of an underwater wellhead for marine oil and gas production. The hydrostatic pressure testing device comprises a sealing end cap and a sealing mandrel, a step through hole is arranged on the sealing end cap, a screw hole matching with the mandrel is arranged at the upper end of the step through hole, an upper hole shoulder is arranged at the upper end of the screw hole, a locking hole matching with the periphery of the wellhead is arranged at the lower end of the step through hole, a ring slot is arranged in the locking hole, movable lock blocks are mounted in the ring slot, a lower hole shoulder is disposed at the upper end of the locking hole, the upper end of the sealing mandrel is provided with threads and is hermetically connected with the screw hole at the upper end of the sealing end cap, the periphery of the sealing mandrel matches with an inner hole of the wellhead, the periphery of the lower end of the sealing mandrel hermetically matches with the lower side of the inner hole of the wellhead, and an injection hole which is communicated with a cavity in the middle of the step through hole is arranged on the sealing end cap or the sealing mandrel. The hydrostatic pressure testing device is simple in structure, reasonable in arrangement, convenient in use and installation, high in safety and reliability and long in service life, and can be reused.

Description

technical field [0001] The invention relates to a body hydrostatic pressure test device of an underwater wellhead head used for offshore oil and gas exploitation, which is used for the factory test of the hydrostatic pressure of the high-pressure wellhead head body. Background technique [0002] In offshore oil and gas production, the wellhead is the key pressure-bearing component in the underwater wellhead system, which sits in the conduit head and is the foundation of the underwater oil well. The surface casing, casing string and tubing hanger are suspended from the wellhead head, and bear external loads. Its pressure bearing performance directly determines the pressure integrity of the oil well. During drilling, the wellhead is connected to the blowout preventer to withstand the liquid column pressure in the riser, especially to withstand the pressure test load of the blowout preventer during the pressure test of the blowout preventer; during oil and gas production, the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12
Inventor 谷玉洪田红平叶道辉苏强佘运玖
Owner KINGDREAM PLC CO
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