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Dual-caliper microelectrode sidewall contact device

A technology of micro-electrode and pusher, which is applied in wellbore/well components, measurement, earthwork drilling and production, etc. It can solve the problem that the pusher arm of the pusher is opened or retracted at the same time, and the microelectrode plate cannot be continuously attached to the well wall Measurement and other issues, to achieve accurate and efficient measurement values

Active Publication Date: 2015-11-25
沈阳新锦精密仪器仪表研究所
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a micro-electrode pusher with double well diameters, which fundamentally solves the problems that the pusher arms of the existing pusher must be opened or folded at the same time, and the micro-electrode plate cannot be continuously attached to the well wall for measurement. It has the advantages of simple structure and high measurement efficiency

Method used

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  • Dual-caliper microelectrode sidewall contact device
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  • Dual-caliper microelectrode sidewall contact device

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Embodiment Construction

[0033] The following combination Figure 1~18 , the content of the present invention will be described in detail through specific embodiments. The double-bore microelectrode pusher includes a drive assembly, a bore arm assembly, a spring rod assembly and a measuring arm assembly assembled in sequence. The drive assembly is provided with a switch assembly, and the spring rod assembly is provided with a pole plate assembly. Wherein, the drive assembly includes a motor housing 1, a number of struts 14 limited in the motor housing 1, a motor 3 limited between the struts 14, a lead screw 34 installed at the output end of the motor 3, and a lead screw 34 limited in place. The screw nut I41 on the top, the switch assembly limited on the lead screw 34, the joint 37 sleeved on the outside of the lead screw 34, one end of the joint 37 is equipped with a number of pins 6 with wires at the ends, and the pins 6 are distributed circumferentially. On the outside of the lead screw 34, a need...

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Abstract

A dual-caliper microelectrode sidewall contact device comprises a driving assembly, a caliper arm assembly, a spring rod assembly and a measuring arm assembly which are assembled sequentially. A switch assembly is arranged in the driving assembly. An electrode plate assembly is arranged on the spring rod assembly. The dual-caliper microelectrode sidewall contact device is technically characterized in that the driving assembly comprises a motor shell, a motor limited in the motor shell, a lead screw arranged at the output end of the motor, a nut I limited on the lead screw, a switch assembly limited on the lead screw and a connector arranged outside the lead screw in a sleeving mode, a needle bearing and a thrust bearing are limited between the lead screw and the connector, a plurality of seal rings are arranged between the lead screw and the connector, a plurality of insertion pins are axially arranged at the end, close to the caliper arm assembly, of the connector with the lead screw as the center, an oil inlet is formed in one side of the connector, an oil way communicated with the oil inlet is arranged in the connector, a jackscrew is arranged at the outlet of the oil way, a spring II is limited in the jackscrew, and a steel ball is limited between the spring and the oil way. The dual-caliper microelectrode sidewall contact device has the advantages of being simple in structure, high in measurement efficiency and the like.

Description

technical field [0001] The invention belongs to petroleum wellhead equipment, in particular to a pushing mechanism for measuring diameter or borehole-related dimensions, in particular to a double-diameter microelectrode pushing device. Background technique [0002] In recent years, the number of high-inclination directional wells and horizontal wells has been increasing. The microsphere focusing logging tool is a micro-resistivity instrument, which is used to measure the resistivity of the formation near the well wall, that is, the flushing zone. The probe (plate) and the well Whether the wall contact is good or not is the key to ensure the logging quality. The instrument usually consists of three parts: electronic instrument, transmission system and pusher. The pusher can be divided into hydraulic pusher and mechanical pusher according to the different power sources. When logging, use a pusher to stick the instrument probe, that is, the polar plate, to the well wall to ens...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B47/08E21B49/00
Inventor 赵曦李刚王绍山丁文强
Owner 沈阳新锦精密仪器仪表研究所
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