Multipurpose Well Sealer
A sealing device, multi-purpose technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problems of manpower occupation, equipment time, and long cycle, so as to shorten the operation cycle and improve utilization Efficiency, reliable sealing effect
Inactive Publication Date: 2015-09-16
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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- Abstract
- Description
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- Application Information
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Problems solved by technology
In the past, spraying was required after fracturing, and the construction of the next process could not be continued until the pressure reached the construction requirements. However, the cycle of spraying and pressure relief was generally relatively long, which took up a lot of personnel, equipment, and time
Method used
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Embodiment Construction
[0011] Such as figure 1 As shown, the foundation of the multi-purpose sealer is a sealer body 10 with a cylindrical cavity in the middle. There are steps inside the cavity. There is a bushing 6, the upper end of the bushing 6 is located on the secondary sealing rubber core 1, the bottom sealing rubber core 2, the bushing 6 and the secondary sealing rubber core 1 are compressed by the rubber core pressing plate 7, and they are fastened by threads . The rubber core pressing plate 7 is fixedly connected with the sealer body 10 through threads.
[0012] In this way, the bottom sealing rubber core 2 is located in the lower rubber sleeve cavity, the secondary sealing rubber core 1 is located in the upper rubber sleeve cavity, the upper and lower rubber sleeve cavities are connected through the diversion channel, and the bushing 6 connects the two rubber sleeve cavities separated.
[0013] The bushing 6 is provided with a second annular groove 5 , which is a groove surrounding th...
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The invention discloses a multipurpose well shutting machine, which is characterized in that a cylindrical cavity is formed inside a well shutting device body, and is provided with a step; a bottom layer sealing rubber core is directly seated on the cavity step inside the well shutting device; a lining is seated on the upper end face of the bottom layer sealing rubber core; secondary sealing rubber cores are seated on the upper end face of the lining; rubber core pressure plates are used for fixedly connecting the bottom layer sealing rubber core, the lining and the secondary sealing rubber cores through screw threads so that the bottom layer sealing rubber core, the lining and the secondary sealing rubber cores are mutually compressed up and down; the rubber core pressure plates are also fixedly connected with the well shutting device body through screw threads; the bottom layer sealing rubber core is positioned on a lower layer rubber sleeve cavity; the secondary sealing rubber cores are positioned on upper layer rubber sleeve cavities; and the bottom layer sealing rubber core is communicated with the secondary sealing rubber cores through a diversion channel; a balance valve is fixed together with the well shutting device body through screw threads, and is communicated with the diversion channel; an overflow valve is connected with the well shutting device body through screw threads, and is communicated with the upper layer rubber sleeve cavities; and a check valve is fixed inside the lining through screw threads. Due to the adoption of the multipurpose well shutting machine, pipe column detaching construction can be performed when a shaft is under a certain pressure, and a secondary protection sealing rubber sleeve is arranged.
Description
technical field [0001] The invention relates to the technical field of oil and gas drilling and production, and is one of the wellhead tools in oil and gas field reservoir reconstruction operations, in particular a multipurpose well sealing device. Background technique [0002] The well sealing device is an essential downhole tool in oil and gas drilling and development. In order to improve the construction efficiency and shorten the operation period, the research on the construction operation under pressure has been carried out. In the past, spraying was required after fracturing, and the construction of the next process could not be continued until the pressure reached the construction requirements. However, the cycle of spraying and pressure relief was generally relatively long, which took up a lot of personnel, equipment, and time. Therefore, we need to design a well sealing device that can withstand high pressure, so that it can realize the construction operation under ...
Claims
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IPC IPC(8): E21B33/03
Inventor 杜加玉苏敏文王文武张波张海涛左挺李还向胡期旭侯俊耀刘钊
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO