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Lifting pressurized well-repairing technology in closed oil pipe

A technology for tubing and well workover, applied in the direction of drilling pipe, casing, drilling equipment, etc.

Inactive Publication Date: 2012-07-11
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a good solution to the safe tripping operation of unblocked pipe strings in wells with pressure operation in oil and gas wells

Method used

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  • Lifting pressurized well-repairing technology in closed oil pipe
  • Lifting pressurized well-repairing technology in closed oil pipe
  • Lifting pressurized well-repairing technology in closed oil pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0024] The craftsmanship of the inner lift belt of the tangent oil pipe is characterized by at least the following steps:

[0025] Step 1. Equipment installation, that is, the installation of the well -lift band of the well -lift band repair of the well;

[0026] Step 2, coexisting the oil pipe suspension;

[0027] Step 3, band pressure raising inner tube strings;

[0028] Step 4, ribbon with pressure to remove the buckle;

[0029] Step 5, take a small distance to support the upper mention;

[0030] Step 6, segmentation of high pressure -low pressure cavity;

[0031] Step 7. Press the oil pipe often.

Embodiment ２

[0033] Such as figure 1 Show, when performing oil and gas well band pressure operations, by adopting this process, the unobstructed oil pipe in the oil and gas well can actively lift and lower the pressure in the high pressure cavity of the device. According to the operation needsAnd the internal tools are correct and unload operations to realize the height and low voltage separation of the device cavity, so that the well operates to implement the drilling operation often.

[0034] The detailed steps are as follows:

[0035] Step 1. Equipment installation, that is, the installation of the well -lift band of the well -lift band repair of the well;

[0036] 1) Check and test and press the installation of the well -closed oil pipe lifting band pressure repair.

[0037] 2) Temporarily blocking tools in the oil pipe in the well mouth to temporarily block the well in the well in the well, so that the oil pipe is kept in a temporary blocked state in a short period of time.

[0038] 3) Es...

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Abstract

The invention relates to a lifting pressurized well-repairing technology in a closed oil pipe. The technology at least comprises the following steps: 1) mounting equipment, namely, mounting a lifting pressurized well-repairing device in the closed oil pipe; 2) fishing an oil pipe hanger under pressure; 3) lifting a pipe strand in the well under pressure; 4) holding a detaching buckle under pressure; 5) holding and lifting for a small distance under pressure; 6) dividing high-pressure and low-pressure chambers; and 7) lifting the oil pipe under normal pressure. According to the technology, a pressurized unplugged oil pipe in an oil-gas well is actively lifted up and pressed down in the high-pressure chamber of the device; the operations of holding the oil pipe in the high-pressure chamber and tools in the well and assembling and disassembling the buckle are performed according to an operation requirement; the separation of the high pressure and low pressure in the chamber is realized; the normal-pressure lifting / drilling operation can be completed by an operator at the well head; and the problem of safety lifting / drilling operation for the unplugged pipe strand in pressurized operation in the oil-gas well is efficiently solved.

Description

Technical field [0001] The present invention involves oil and gas well bands for repairing the well, especially in a closed oil pipe lifting band to repair the well.It belongs to the field of oil and gas field mining machinery technology. Background technique [0002] In recent years, with the increase in the development of oil and gas fields, the proportion of workloads of oil and gas wells with pressure operations have become increasingly large, and the corresponding development of the corresponding pressure operation equipment tools are lagging behind.The internal tube strings are under closed bands, and there is a greater risk of the operation process, and the essential safety of the operation of the operation cannot be truly achieved. [0003] At present, the band -operating equipment used in the oil and gas fields must block the oil pipes in the well. This is the first step in the operation of pressure operations. After years of fluid corrosion in the well, severe scaling, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03E21B19/00
Inventor 徐迎新孙虎周丰刘国良张冕韩文哲牛俊峰邓继学魏建荣
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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