Hydraulic support devices for cased wells
A hydraulic support and cased well technology, applied in wellbore/well parts, earthwork drilling and production, etc., can solve the problems of small support force and difficulty in meeting requirements, and achieve the effects of high safety, improved anchoring force, and easy promotion
Active Publication Date: 2021-10-26
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0002] In the process of oil and gas exploration and development, cables are often used to lower instruments into wells for drilling, sampling and other operations. Before construction, the instruments are first fixed to the casing in the well. At present, downhole instruments generally use hydraulic support arms to realize this function. , the hydraulic support arm is affected by its structural characteristics, and the support force formed by the well wall is relatively small, which can meet the needs of conventional operations, but it is difficult to meet the requirements when faced with special working conditions such as drilling and unblocking
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[0029] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.
[0030] Such as Figure 1-7 As shown, the hydraulic support device for cased wells of the present invention is characterized in that it includes a ground control system 17, a cable 18 connected to the ground control system 17, a hydraulic control unit 19 connected to the cable 18, and a The support unit 20 connected to the hydraulic control unit 19,
[0031] The hydraulic control unit 19 includes a balance outer cylinder 3, a balance piston 2 arranged inside the balance outer cylinder 3 and slidingly connected to the inner wall of the balance outer cylinder 3, a lead tube 1 arranged in the balance outer cylinder 3, and a The wires in the lead pipe 1 are arranged on the support frame 7 inside the balance outer cylinder 3, and the pressure plate 12 fixedly connected to the bottom of the support frame 7 is fixed on the support frame 7...
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The invention belongs to the technical field of oil and gas industry logging and drilling and completion, and in particular relates to a hydraulic support device for a cased well, which is characterized in that it includes a ground control system, a cable, a hydraulic control unit, a support unit, and the hydraulic control unit includes Balance outer cylinder, balance piston, lead pipe, pressure plate, motor, hydraulic pump, electromagnetic reversing valve I and electromagnetic reversing valve II, electromagnetic reversing valve I is connected to the supporting unit, and electromagnetic reversing valve II is connected to the supporting unit , the support unit includes a main body, several stepped holes arranged on the main body, pistons, slips, springs, and pressure caps respectively arranged in each stepped hole, and a flow channel respectively connected to several stepped holes. Channel II and several channels I. The invention uses hydraulic pressure as the power to push the slips out, and the slips engage with the casing wall of the wellbore to form a locking force to fix the instrument for the next construction operation. After the construction is completed, switch the hydraulic inlet and outlet, and push the slips to shrink. Back, unanchored.
Description
technical field [0001] The invention belongs to the technical field of well logging and drilling and completion in the petroleum and natural gas industry, and in particular relates to a hydraulic support device for a cased well. Background technique [0002] In the process of oil and gas exploration and development, cables are often used to lower instruments into wells for drilling, sampling and other operations. Before construction, the instruments are first fixed to the casing in the well. At present, downhole instruments generally use hydraulic support arms to realize this function. , the hydraulic support arm is affected by its structural characteristics, and the support force formed by the well wall is relatively small, which can meet the needs of conventional operations, but it is difficult to meet the requirements when faced with special working conditions such as drilling and unblocking. Contents of the invention [0003] The purpose of the present invention is to ...
Claims
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IPC IPC(8): E21B23/08E21B23/01
CPCE21B23/01E21B23/08
Inventor 刘平全施连海白冬青李磊兵张秋阳徐涛韩龙钟富林杨帆霍新张帆翟晓雨
Owner BC P INC CHINA NAT PETROLEUM CORP