Oil pipe exhaust
A technology of exhaust device and oil pipe, which is applied in the direction of wellbore/well valve device, wellbore/well parts, earthwork drilling and production, etc. It can solve the problems of tedious grouting operation, time-consuming and labor-intensive grouting, and grouting dissatisfaction.
Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0002] In the field of oil and water well workover, due to the requirements of some special processes, the liquids inside and outside the tubing have different densities. Therefore, the traditional automatic grouting device cannot meet the process requirements. It can only run down the empty pipe string, and wait for the tool to be lowered in place. The oil pipe is filled with liquid through ground grouting. At this time, due to the small inner diameter of the pipe string and the long pipe string, it is difficult to discharge the air smoothly, so it is very easy to cause dissatisfaction of grouting or spraying.
The grouting operation is not only cumbersome, time-consuming and labor-intensive, but also easily pollutes the environment. In extreme cases, it may lead to failure of downhole workover tools
Method used
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[0016] see figure 1 Structural diagram of oil pipe exhaust device. Oil pipe exhaust device, the side wall of the casing 112 is provided with an exhaust hole 111, the diameter of the exhaust hole 111 is large on the outside and small on the inside, a ball 109 is arranged in the exhaust hole 111, and a stop pin 107 is arranged at the outlet of the exhaust hole 111; The inner hole of the housing 112 is provided with a positioning step 113, the positioning step 113 is located below the exhaust hole 111, the sliding sleeve 105 is installed in the housing 112, and the sliding sleeve 105 is fixed through the side wall of the housing 112 with the scissors 106, so that the lower end of the sliding sleeve 105 It is located above the exhaust hole 111; the outer wall of the sliding sleeve 105 is stepped cylindrical, and its diameter is small at the top and large at the bottom, and a radial guide hole 103 is set at the small diameter; the upper end of the shell 112 is provided with an uppe...
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The invention provides an oil pipe exhaust device used for carrying out casing damage well repairing in oil fields. An exhaust hole is formed in the side wall of an outer shell, a ball is arranged in the exhaust hole, and a stop pin is arranged at an outlet of the exhaust hole. A locating step is arranged in the outer shell and located below the exhaust hole, a sliding sleeve is arranged in the outer shell and is fixed through a shear pin, the outer wall of the sliding sleeve is in a stepped cylindrical shape, and a flow guiding hole is formed in the small diameter position of the sliding sleeve. An upper connector is arranged at the upper end of the outer shell, an inner hole of the upper connector and an inner hole of the outer shell are matched with the stepped cylindrical outer surface of the sliding sleeve, and three sealing rings are arranged at the matching positions and are located at the upper end, the middle portion and the lower end of the periphery of the sliding sleeve. A flow guiding sleeve is mounted at the lower end of the outer shell, and a shear pin is arranged at the upper end of the flow guiding sleeve to fix a blind plug in the flow guiding sleeve. Through the exhaust hole, the sliding sleeve and the flow guiding hole, the oil pipe exhaust device has the functions of placing an empty tubular column, exhausting and pressure guiding.
Description
technical field [0001] The invention relates to a matching downhole tool of a workover tool used in oilfield development, in particular to an oil pipe exhaust device, which is used for repairing an oil-water well with casing damage. Background technique [0002] In the field of oil and water well workover, due to the requirements of some special processes, the liquids inside and outside the tubing have different densities. Therefore, the traditional automatic grouting device cannot meet the process requirements. It can only run down the empty pipe string, and wait for the tool to be lowered in place. The oil pipe is filled with liquid through ground grouting. At this time, due to the small inner diameter of the pipe string and the long pipe string, it is difficult for the air to be discharged smoothly, so it is very easy to cause dissatisfaction with grouting or spraying. The grouting operation is not only cumbersome, time-consuming and labor-intensive, but also easily pollu...
Claims
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IPC IPC(8): E21B34/06
Inventor 朱瑛辉张全胜叶金胜杨琴琴田玉刚伊伟锴温盛魁杨慧张化强岳广韬曹雪梅
Owner CHINA PETROLEUM & CHEM CORP