Tubing plugging method

A plugging method and oil pipe technology, which are used in earth-moving drilling, wellbore/well components, sealing/packing, etc., can solve the problems of high cost, high risk of well control and equipment operation, and achieve low cost and improved operation. Efficiency and simple operation

Active Publication Date: 2022-07-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing methods for dealing with leaks in tubing require investment in large-scale equipment such as workover rigs and a lot of manpower and material resources. The construction time takes several months, the cost is high, and the risk of well control and equipment operation is high.

Method used

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Embodiment Construction

[0036] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] In order to facilitate understanding of the embodiments of the present invention, the following first combines figure 1 The application scenarios of the embodiments of the present invention are briefly described. figure 1 It is a schematic structural diagram of the gas well before the leak point is plugged according to the embodiment of the present invention. Combine below figure 1 It shows that there is a leak point in the tubing, and the structure of the gas well before the leak point is blocked. like figure 1 As shown, there is a leak point 21 in the tubing 2 after completion of the well, the tubing 2 is filled with natural gas, and the space between the tubing 2 and the innermost casing 1 of the wellbore is also filled with natu...

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Abstract

The invention discloses a leakage plugging method for an oil pipe, which belongs to the safety field of oil and gas wells. The method includes: determining the position of the leak point on the oil pipe; setting the oil pipe with a plug, the plug being located below the leak point in the length direction of the oil pipe; squeezing a plugging agent from the oil pipe into the leak point, and make the plugging agent solidify in the leak point during the extrusion process; take out the plug. In the invention, the oil pipe is first set with a plug, and the leakage plugging agent is squeezed into the leakage point channel from the oil pipe to block the leakage point. The whole process does not need to take out the oil pipe and does not change the structure of the pipe string. The entire plugging construction operation is simple, and the construction time is only It takes a few days, the cost is low, and the risk is low.

Description

technical field [0001] The invention relates to the safety field of oil and gas water wells, in particular to a method for plugging leakage of oil pipes. Background technique [0002] The leakage point of the oil pipe will cause the corrosive fluid or high-pressure fluid in the oil pipe to enter the closed annulus formed by the oil pipe and the innermost casing, corroding or destroying the innermost casing and the wellhead device, so the leakage point of the oil pipe should be blocked. . The failure of the oil pipe connection thread seal or the damaged position of the oil pipe body is called the leakage point of the oil pipe. [0003] The existing method for dealing with the leakage point of the oil pipe is mainly to replace the oil pipe after taking out the pipe string of the leakage point part through the workover operation. Existing methods for dealing with leakage points of oil pipes need to invest large equipment such as workover rigs and more manpower and material re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 舒刚李玉飞何轶果张林阳星冯兆阳汪传磊朱达江周浪冉立王晓娇王斌李晓蔓王珏皓陈浩
Owner PETROCHINA CO LTD
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