A Dipole Antenna Subsection of an Electromagnetic Measurement While Drilling System
A dipole antenna and measurement-while-drilling technology, which is applied in mines, coalbed methane, and oil and gas fields, can solve the problems of easy peeling off of insulating coating, high brittleness of insulating coating, and insulation failure, so as to reduce processing difficulty and ensure mechanical structure strength , The effect of improving the yield
Active Publication Date: 2016-01-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
This method has very high requirements on the metal joint processing technology and the insulating coating manufacturing process, the product success rate is low, and the cost is high, and because the insulating coating is brittle, if it is bumped during installation and disassembly, the insulating coating is easy to fall off , will cause insulation failure
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[0034] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0035] Such as figure 1 As shown, a dipole antenna sub-section of the electromagnetic measurement-while-drilling system is used in the electromagnetic telemetry measurement-while-drilling system (EM-MWD).
[0036] The dipole antenna short section includes an upper joint 1, an insulating joint and a lower joint 6;
[0037] One end of the upper joint 1 is connected to the upper drill string, the other end is connected to one end of the insulating joint, the other end of the insulating joint is connected to one end of the lower joint 6, and the other end of the lower joint 6 is connected to the lower drill string;
[0038]The insulating joint includes an insulating joint body 4 and an inner insulating tube 5;
[0039] The insulating joint body 4 is a double male joint, which includes a cylindrical section, and a conical section is respectively connected to both ends of...
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The invention provides a dipole antenna short section of an electromagnetic measurement while drilling system and belongs to the fields of oil and gas field, coal bed gas and mine. The dipole antenna short section comprises an upper joint (1), an insulated joint and a lower joint (6), wherein one end of the upper joint (1) is connected with an upper drill stem; the other end of the upper joint (1) is connected with one end of the insulated joint; the other end of the insulated joint is connected with one end of the lower joint (6); the other end of the lower joint (6) is connected with a lower drill stem; the insulated joint comprises an insulated joint body (4) and an internal insulation pipe (5); the upper joint (1), the insulated joint body (4) and the lower joint (6) are all made of metal materials. The underground electromagnetic signal transmission of the electromagnetic measurement while drilling system is realized by the dipole antenna short section, the mechanical structural intensity of the dipole antenna short section is ensured, the processing difficulty is reduced, and the yield is improved.
Description
technical field [0001] The invention belongs to the fields of oil and gas fields, coal bed methane and mines, and in particular relates to a dipole antenna nipple of an electromagnetic measurement-while-drilling system. Background technique [0002] In modern drilling technology, more and more sensors are installed in the downhole drill string to measure the borehole environment and parameters while drilling, such as the measurement of pressure, space attitude, temperature, gamma, etc. Data from the sensors is sent to a measurement-while-drilling device, from which it is transmitted to the surface. With the depletion of global oil and gas resources and the increasing demand for energy from social development, the development of low-pressure oil and gas reservoirs and coalbed methane has received more and more attention. At the same time, in order to better develop such resources, more and more special drilling techniques are used. , such as directional wells, horizontal wel...
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IPC IPC(8): E21B47/13
Inventor 杨春国高炳堂宋朝晖刘修善王立双刘科满
Owner CHINA PETROLEUM & CHEM CORP