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Push-pull type multi-arm righting hole diameter micrologging instrument

A micro-electrode and logging tool technology, applied in the field of logging tools, can solve problems such as easy to swing, unable to be centered, and unable to meet the needs of measuring deviated wells

Active Publication Date: 2008-02-27
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

The above-mentioned borehole microelectrode combination logging tool cannot be centered in a deviated well, because there is only one point of contact with the borehole wall in the axial direction, and it is prone to swing
Therefore, it can no longer meet the needs of measuring deviated wells

Method used

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  • Push-pull type multi-arm righting hole diameter micrologging instrument
  • Push-pull type multi-arm righting hole diameter micrologging instrument
  • Push-pull type multi-arm righting hole diameter micrologging instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] What is shown in Fig. 1 is the driving part, the driving motor (2) and the transmission shaft (3) are connected and fixed in the pressure-bearing sealing cylinder (1), and the transmission shaft (3) is formed by multi-section connection, which is convenient for installation. The connected drive motor (2) and transmission shaft (3) are supported and placed in the support housing (5) through a pressure-bearing sealing support plug (4). The supporting shell (5) is also formed by connecting several parts, which is convenient for installation.

[0011] Shown in FIG. 2 is the microelectrode section. The microelectrode plate (15) is fixed on the supporting shell (5) by the rotating shaft (8) through the microelectrode auxiliary support arm (11). The lower part of the microelectrode plate (15) is supported by the microelectrode main support arm (12). The other end of the microelectrode main support arm (12) is fixed on the support case (5) by a rotating shaft (8). The microe...

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PUM

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Abstract

The push type multiple arm microelectrode well logger includes one link rod, one righting support arm, one microelectrode plate, one piston spring, caliper logging arms, one supporting arm and other parts. The microelectrode plate has the lower part supported with one main supporting arm fixed through one rotating shaft on the support casing and installed through one link rod on the driving shaft together with the microelectrode sliding spring box; the righting support arm is connected through one other link rod to the sliding block; one built-in spring mounted on the driving shaft is contacted with the caliper logging arms during the shift of the driving shaft; and all the caliper logging arms are controlled with the driving shaft for synchronous stretching out and collecting. Each of the caliper logging arms can operate alone.

Description

technical field [0001] The invention relates to a well logging instrument for open-hole wells, in particular to a push-and-rest type multi-arm centralizing borehole diameter microelectrode well logging instrument. Background technique [0002] Most of the existing caliper and microelectrode combination logging tools are composed of two measuring arms or four measuring arms. equiangular distribution. A microelectrode is attached to one of the measuring arms. The caliper microelectrode logging tool with two or four measuring arms is driven by the driving device to spread the measuring arms to stick to the well arms. The tool has only one point of contact with the borehole wall in the axial direction. [0003] With the development of oilfield exploration and development, more and more deviated wells are being drilled, and the well conditions are becoming more complex. The requirements for geological parameters are also getting higher and higher. It is necessary to describe t...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/08
Inventor 李文东刘建成贾向东苏藏娟刘宝进刘国权董斌程辉范林张鸿杰徐涛赵阳田丽萍吴玲
Owner BC P INC CHINA NAT PETROLEUM CORP
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