Cable testing instrument falling prevention device in oil-gas well
A technology for cable testing and testing instruments, applied in wellbore/well components, earth-moving drilling, construction, etc., can solve the problems of broken and scrapped instruments, cables under force and cables being broken, data cannot be recorded, etc., to prevent breakage Scrap effect
Active Publication Date: 2018-06-12
PETROCHINA CO LTD
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Problems solved by technology
Pulling the cable hard will increase the force on the cable so much that the cable will be broken, which will cause the instrument to fall to the bottom of the well, not only the detection data cannot be recorded, but also affect the normal oil and gas production and the instrument will fall to the bottom of the well and be damaged and scrapped. cause serious economic losses
Method used
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[0029] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0030] figure 1 It is a schematic structural diagram of an instrument drop prevention device for cable testing in oil and gas wells shown in an exemplary embodiment of the present invention. see figure 1 , the present invention provides a kind of anti-instrument drop device for cable testing in oil and gas wells, comprising at least:
[0031] The upper connector 3 for connecting with the cable connector;
[0032] The claw support sleeve 4 located under the upper joint 3;
[0033] The spring 5 arranged in the claw support 4 and abutting against the inner upper surface 401 of the claw support 4;
[0034] A tension adjustment head 6 abutted against the lower end of the spring 5 and connected to the upper joint 3; and
[0035] A steady frame 10 connec...
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The invention discloses a cable testing instrument falling prevention device in an oil-gas well. The cable testing instrument falling prevention device comprises an upper joint used for being connected with a cable joint, a clamping jaw supporting sleeve located on the lower portion of the upper joint, a spring abutting against the upper surface inside the clamping jaw supporting sleeve, a tensileforce adjusting head abutting against the lower end of the spring and connected with the upper joint, and a central frame connected with the lower end of the clamping jaw supporting sleeve and used for being connected with a downhole testing instrument. The central frame comprises a central frame first part located inside the clamping jaw supporting sleeve and a central frame second part locatedoutside the clamping jaw supporting sleeve; the clamping jaw supporting sleeve is provided with an axial open groove, and at least one clamping jaw capable of rotating relative to the clamping jaw supporting sleeve is arranged in the open groove; an elastic part used for unfolding the lower ends of the clamping jaws is arranged between the central frame first part and the clamping jaws; and the upper ends of the clamping jaws are clamped between the tensile force adjusting head and the clamping claw supporting sleeve. The cable testing instrument falling prevention device can be clamped on a tubing coupling, and the situation that an instrument connected with the cable testing instrument falling prevention device falls in a downhole, accordingly breaks down and is scrapped is prevented effectively.
Description
technical field [0001] The invention relates to the technical field of instrument testing in oil and gas wells, in particular to an instrument drop prevention device for cable testing in oil and gas wells. Background technique [0002] In the process of oil and gas production, it is often necessary to lower various testing instruments into oil and gas wells for testing. Occasionally, during testing, the downhole tool became stuck in the wellbore casing. Pulling the cable hard will increase the force on the cable so much that the cable will be broken, which will cause the instrument to fall to the bottom of the well, not only the detection data cannot be recorded, but also affect the normal oil and gas production and the instrument will fall to the bottom of the well and be damaged and scrapped. cause serious economic losses. Contents of the invention [0003] The invention provides a cable testing instrument drop prevention device in an oil and gas well, which is used to...
Claims
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Login to View More IPC IPC(8): E21B47/017E21B41/00
CPCE21B41/0021E21B47/017
Inventor 张智峰史国宏马鸿礼杨国军宋彦海杨喜彦吴胜利冯胜利
Owner PETROCHINA CO LTD