A multi-channel parallel threading drill pipe for measurement while drilling
A measurement-while-drilling and multi-channel technology, which is applied in the fields of coal mine, geology and petroleum exploration, can solve the problems of large space occupation, small flow area of the central through hole, and many cable parts, so as to achieve convenient maintenance, reduce wear and tear, The effect of increasing the flow area
Active Publication Date: 2021-02-26
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology
[0006] In view of the above problems, the present invention provides a multi-channel parallel threaded drill pipe for measurement while drilling, which solves the problems of the existing measurement while drilling drill pipe with many cable components, large space occupation, and small flow area of the central through hole.
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[0040] Such as figure 1 As shown, the present invention discloses a multi-channel parallel threading drill pipe for measurement while drilling, which includes a pipe body 1, male joints 2 and female joints 3 respectively arranged at both ends of the pipe body 1, and threading pipes for placing cables 8. The tube 4 , the first contact piece 5 and the second contact piece 6 for connecting the cable 8 , the first contact piece 5 is arranged on the end surface of the male joint 2 , and the second contact piece 6 is arranged on the end surface of the female joint 3 .
[0041] Specifically, in a specific embodiment of the present invention, the pipe body 1 is a high-strength and high-toughness steel pipe, and the male joint 2 and the female joint 3 are respectively butted on the pipe walls at both ends of the pipe body by friction welding.
[0042] Such as figure 2 As shown, the end surface of the male joint 2 is provided with a first through hole 202 passing through the male join...
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The invention discloses a multi-channel parallel threading drill pipe for measurement while drilling, which comprises a pipe body, male joints and female joints respectively arranged at both ends of the pipe body, a threading pipe for placing cables, and a pipe for connecting cables. The first contact piece and the second contact piece; the two ends of the threading pipe are respectively inserted into the first through hole of the male joint and the second through hole of the female joint, and the middle section is tangent to the inner wall of the pipe, fixed and fixed by a flexible filling layer Sealing; the first contact piece and the second contact piece are respectively arranged on the end surfaces of the male joint and the female joint, and after the adjacent drill pipes are connected, the two contact to realize the conduction of the cable. The invention realizes the separation of power supply and signal transmission at the bottom of the hole through multiple parallel cable channels, and improves the reliability and stability of signal transmission. The overall structure is simple, the parts are few, the manufacturing cost is low, and the maintenance is convenient. As a special case, when only a single signal is transmitted, the backup channel in the drill pipe can not affect the signal transmission effect under the condition that one of the wires fails.
Description
technical field [0001] The invention belongs to the technical fields of coal mines, geology and petroleum exploration, and in particular relates to a multi-channel parallel threading drill pipe for measurement while drilling. Background technique [0002] In recent years, the application range of directional drilling technology in coal mines has become more and more extensive, and it is developing rapidly in the direction of automation and intelligence. During the directional drilling process, the wired measurement-while-drilling drill pipe is formed by laying or burying communication wires in the conventional drill pipe. Compared with the wireless measurement-while-drilling drill pipe such as mud pulse and electromagnetic wave, it has a high data transmission rate and is less affected by formation interference. And other advantages, it can realize the power supply of the port while transmitting the signal. [0003] For example, the invention patent CN 100593625 C discloses...
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IPC IPC(8): E21B17/02E21B47/12
CPCE21B17/023E21B47/12
Inventor 王传留马少明田东庄李晴兰菲牟培英杨虎伟李浩儒王亚波邵国杰
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP