An insulating sub for logging
A technology for insulating pup joints and well logging, which is applied in the directions of measurement, drilling equipment, boreholes/well components, etc. It can solve the problems of unstable insulation performance, complex structure, inconvenient disassembly and assembly, etc., so as to improve insulation reliability and increase internal Insulation performance, simple and fast repair and maintenance
Active Publication Date: 2021-01-29
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0004] At present, the insulating pup joints in the existing logging instruments are usually made by bonding, winding or gluing, which have the problems of complex structure, inconvenient disassembly and assembly, and unstable insulation performance
Method used
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[0031] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0032] The insulating pup joint of the present invention is a general structure that can be widely applied to well logging instruments, and can also be applied to large-diameter well logging instruments. By optimizing and improving the structure and corresponding materials of the existing insulating pup joints, Designed the insulating pup joint of the present invention, such as figure 1 As shown, the insulating pup joint of the present invention consists of an upper joint 1, a lower joint 12, a pressure-resistant and insulating pressure-bearing insulator 4, an insulating shell 3 for isolation and insulation, an insulating ring 7, and an insulating sleeve 8, which bear tensile force and are The first nut 9 in the shape of a tension ring, the first nut 9 can bear the pulling force exerted by th...
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The invention relates to an insulating sub for logging, comprising an upper joint, a lower joint, an insulating shell, a pressure-bearing insulating member, an insulating sleeve and a first nut; the upper joint and the lower joint are both in the shape of a hollow stepped shaft, and the upper joint The lower joint is axially arranged, the stepped sections of the upper joint and the lower joint are arranged opposite to each other, and the stepped sections of the upper joint and the lower joint are axially sleeved with mutually insulating pressure-bearing insulating parts and insulating sleeves, and the mutually insulating bearing The pressure insulating part and the insulating sleeve are used to insulate the upper joint and the lower joint. The first nut is axially installed at the end of the upper joint, and the first nut is arranged between the insulating sleeve and the upper joint along the circumferential direction; the insulating shell is sleeved on the upper joint. and the outer side of the lower joint are used to insulate the insulation short section from the outside; the insulation reliability is greatly improved, which makes the installation and disassembly of the overall structure and parts, and the later repair and maintenance very simple and fast. Used on most logging tools.
Description
technical field [0001] The invention belongs to the technical field of oil well logging instruments, in particular to an insulating short joint for well logging. Background technique [0002] Insulating sub is one of the necessary supporting equipment for many logging tools in the logging process, and it is necessary for many special logging tools such as dual laterologging tools, micro-resistivity logging tools, and formation dip logging tools. , A comprehensive test platform with integrated performance such as string testing is also an indispensable supporting equipment. The role of the insulating pup is to connect directly to the upper part of the logging tool through its upper joint or to the lower part of the logging tool through its lower joint during logging, so that the casing of the logging tool is connected to the upper or lower part of other instrument casings The insulation is good and meets the test requirements to ensure the smooth completion of the logging pr...
Claims
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IPC IPC(8): E21B17/042E21B47/00
CPCE21B17/042E21B47/00
Inventor 孙七零王炜王晓冬郭英才王正吴金云杨海
Owner BC P INC CHINA NAT PETROLEUM CORP