Full-airtight high pressure valve leakage treatment device and method

A high-pressure valve, fully enclosed technology, used in wellbore/well valve device, earthwork drilling, sealing/packing, etc., can solve problems such as valve leakage, valve seat damage, etc., to ensure safety and accurate relative position , to ensure the effect of safety

Active Publication Date: 2017-02-01
XIAN DONGXIN GASOLINEEUM EQUIP PLANT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic routine for the main control valve with failure is to replace the valve with a new one during the well killing operation or with a new valve under pressure. Dismantling a large number of faulty valves found that the main cause of valve leakage is the combination seal, valve ...

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  • Full-airtight high pressure valve leakage treatment device and method

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0037] Such as figure 1 As shown, the fully enclosed high-pressure valve leakage control device of the present invention is composed of a hydraulic pressure plugging device and a valve pressure maintenance sealing device,

[0038] The hydraulic pressure plugging device includes a plugging rod, two uprights 5 and a sealing flange 9. The sealing flange 9 is connected to the upper end of the control valve 31. The plugging rod passes through the valve plates of the control valve 31 and the valve 7 and then blocks the In the oil pipe or casing passage of the gas / oil wellhead, the top of the plugging rod is provided with a first hydraulic cylinder 17 for pre-tightening the plugging rod, the center of the plugging rod, the first piston rod 16 of the first hydraulic cylinder 17 and the sealing flange 9 Located on the same center line, the first vent valve 8 and the first...

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Abstract

The invention belongs to the technical field of gas/oil production and the oil exploitation industry, and relates to a full-airtight high pressure valve leakage treatment device and method. The device comprises a hydraulic under-pressure plugging unit and a valve under-pressure maintenance sealing unit. The hydraulic under-pressure plugging unit is arranged at a valve and used for plugging a channel of an oil pipe or a sleeve at a gas/oil production wellhead; the valve under-pressure maintenance sealing unit is connected with the valve and comprises a conversion nipple; a second vent valve is arranged on the conversion nipple; the left end of the conversion nipple is connected with a right port of a valve body in a sealed mode; the right end of the conversion nipple is connected with a second hydraulic cylinder in a sealed mode; and the free end of a second piston rod of the second hydraulic cylinder is arranged toward the conversion nipple and connected with the screw thread end of a lead screw of the valve. Under the condition that the gas/oil production wellhead is under pressure, firstly the channel of the oil pipe or the sleeve at the gas/oil production wellhead can be plugged through the device to form a non-pressure environment, then valve parts are disassembled, a damaged valve plate of the valve is replaced, and the valve is recovered after replacement.

Description

[0001] 【Technical Field】 [0002] The invention belongs to the technical field of gas / oil and petroleum extraction industries, and relates to a fully enclosed high-pressure valve leakage control device and method. [0003] 【Background technique】 [0004] The main components of the gas / oil wellhead device, the valve is constantly under the huge pressure of the substratum gas (oil) during long-term use, and is also corroded and washed by hydrogen sulfide gas, so the valve damage is the gas / oil wellhead device common error. At present, the conventional domestic practice for the failed main control valve is to replace a new valve or replace a new valve under pressure. A large number of failed valves were dismantled and found that the main reason for valve leakage was damage to the combined seal, valve plate, and valve seat. Yes, damage to the combined seal and valve plate is more common. After the valve plate is damaged, the damaged valve plate cannot be replaced directly due to the cur...

Claims

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Application Information

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IPC IPC(8): E21B34/02E21B33/03E21B23/00
CPCE21B23/00E21B33/03E21B34/02
Inventor 白登平
Owner XIAN DONGXIN GASOLINEEUM EQUIP PLANT
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