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Button electrode structure for resistivity imaging logging-while-drilling instrument

A technology of resistivity imaging and well logging equipment, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc., and can solve problems such as long wiring length, measurement signal interference, and complicated electrode disassembly process

Pending Publication Date: 2020-10-23
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing button electrodes are installed inside the sleeve centralizer with three-wing wear-resistant belts. The sleeve centralizer needs to be disassembled first to complete the electrode disassembly. The electrode disassembly process is complicated; at the same time, the electrodes are connected to the circuit system through wires. The length of the trace is long, which is easy to cause interference to the measurement signal

Method used

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  • Button electrode structure for resistivity imaging logging-while-drilling instrument
  • Button electrode structure for resistivity imaging logging-while-drilling instrument
  • Button electrode structure for resistivity imaging logging-while-drilling instrument

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing accompanying drawing, the present invention is further described:

[0025] see Figure 1 to Figure 5 , a button electrode structure used in drilling resistivity imaging logging tools, including measuring electrodes, insulating layers, electrode holders, sealing parts and electrical pins; the upper surface of the electrode holder is provided with an insulating layer, on the insulating layer Set the measuring electrode; the lower surface of the electrode holder cover is provided with a sealing part, and an electrical pin is arranged on the sealing part, the measuring electrode is connected to the electrical pin, and the electrode is directly connected to the circuit system through the electrical pin; the electrode holder cover is provided with a bolt hole.

[0026] The sealing part is a columnar structure, and a ring of sealing grooves is arranged on the columnar structure.

[0027] The electrode holder cover is a rectangul...

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Abstract

A button electrode structure for a resistivity imaging logging-while-drilling instrument comprises a measuring electrode, an insulating layer, an electrode supporting cover, a sealing part and an electrical contact pin; the insulating layer is arranged on the upper surface of the electrode supporting cover; the measuring electrode is arranged on the insulating layer; the sealing part is arranged on the lower surface of the electrode supporting cover, the electrical contact pin is arranged on the sealing part, the measuring electrode is connected with the electrical contact pin, and the electrode is directly connected into a circuit system in an electrical contact pin mode; and a bolt hole is formed in the electrode supporting cover. The button electrode structure is greatly simplified, thedismounting and mounting difficulty is reduced, meanwhile, the wiring length between the electrode and the circuit system is shortened, the interference of wiring resistance on a measurement signal is reduced, and the signal-to-noise ratio of the measurement signal is improved.

Description

technical field [0001] The invention belongs to the technical field of button electrodes, and in particular relates to a button electrode structure used for a resistivity imaging logging tool while drilling. Background technique [0002] In the process of petroleum exploration and development, formation resistivity is a very important formation parameter. Compared with wireline logging technology, LWD technology has the advantages of reducing the logging construction process, reducing the cost of exploration and development, and increasing the speed of exploration and development, so it is more and more widely used. [0003] The logging-while-drilling technology can not only provide drilling engineering parameters to effectively enter the reservoir, but also obtain formation information such as lithology, saturation, porosity, etc., realize geosteering and formation evaluation, and solve drilling and logging construction under harsh borehole conditions It is widely used in ...

Claims

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Application Information

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IPC IPC(8): E21B47/002E21B47/12E21B47/13
CPCE21B47/12
Inventor 陈思嘉陈刚阳质量闫麦奎陈亮孙衍郭怡潇尤嘉祺耿尊博马丽祝环芬杨国华
Owner BC P INC CHINA NAT PETROLEUM CORP
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