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Single driving double drawing four arms well diameter, microsphere and microelectrode pushing apparatus

A pushing device and micro-electrode technology, which is applied in wellbore/well components, measurement, earthwork drilling and production, etc., can solve the problems of increased instrument cost, long length, and shortened plate life, so as to achieve shortened instrument length and improved use Longevity, the effect of reducing the cost of caliper measurement

Inactive Publication Date: 2010-02-17
THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the logging process, when measuring the borehole diameter, even if the microelectrode is not measured, the microelectrode pad is always in the open state. Since the borehole diameter measurement section is much larger than the microelectrode measurement section, the microelectrode pad is in contact with the well logging process. Unnecessary wear occurs between well walls, which greatly shortens the life of the plate
[0004] ②Well diameter pushing mechanism + microsphere and microelectrode pushing mechanism: the well diameter pushing mechanism and the microsphere and microelectrode pushing mechanism are two completely independent pushing mechanisms, which are respectively driven by their own motors. The borehole arm, microspheres, and microelectrode plates are opened and closed separately, but the length of the instrument combination is longer. For downhole instruments, the shorter the length, the better; at the same time, due to the addition of a set of motor drive mechanisms, the cost of the instrument is reduced. Increase

Method used

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  • Single driving double drawing four arms well diameter, microsphere and microelectrode pushing apparatus
  • Single driving double drawing four arms well diameter, microsphere and microelectrode pushing apparatus
  • Single driving double drawing four arms well diameter, microsphere and microelectrode pushing apparatus

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Experimental program
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Embodiment 1

[0034] Embodiment 1: The present invention is described further in conjunction with accompanying drawing:

[0035] basic composition

[0036] The basic composition is as Figure 1-Figure 3 As shown in the figure, the support tube 1 is the basic support of the entire pushing device, and the center tube 2 is driven by a motor through a ball screw to reciprocate along the axial direction of the supporting tube 1 to provide pushing power for the entire pushing device; Cover 3, driving sleeve 26 are axially fixedly connected with center pipe 2; borehole sliding disc 9, borehole support disc 14, pole plate closing sleeve 15, pole plate closing plate 19, pole plate closing spring 16, and driven plate 24 can be moved along The support pipe 1 and the central pipe 2 slide axially; the borehole support plate 14 and the pole plate support plate 20 are fixedly connected with the support pipe 1 .

[0037] Borehole push mechanism: borehole push mechanism consists of borehole casing 3, bore...

Embodiment 2

[0051] Embodiment two: see Figure 5-Figure 10 , this embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that: under the condition that the borehole spring 12 ensures the required elastic force, the fixed connection between the borehole support plate 14 and the support pipe 1 is changed to For the borehole diameter support plate 14 can slide in the support pipe 1 with the opening and closing of the borehole diameter measuring arm 6, when the borehole diameter measuring arm 6 is fully retracted, the borehole spring 12 is in a pre-tightened state, which can improve the borehole spring 12. service life.

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Abstract

The invention discloses a single-drive double-recovery four-wall push device for a well diameter, a micro-ball and a micro-electrode; the inner edges of the recovery sleeve and the drive sleeve of thepush device are all coaxially connected with a central pipe; the outer edges thereof are respectively connected with a well diameter connection board and an electrode plate connection board; both thewell diameter connection board and the electrode plate connection board can move along a long-strip hole arranged on the wall of a supporting pipe; a well diameter supporting disc and an electrode plate supporting disc are connected with the supporting pipe; a well diameter sliding disc, an electrode plate recovery sleeve, an electrode plate recovery disc and a driven disc are respectively provided with a locating pin; the locating pins can move in the long-strip holes respectively arranged on the well diameter connection board and the electrode plate connection board; four shrieking-openingwell diameter measuring walls are arranged between the well diameter recovery sleeve and the well diameter sliding disc; two shrieking-opening electrode plates are arranged between the supporting tubeand the electrode plate supporting disc. A single motor is adopted by the invention for driving; the well diameter measuring walls, the micro-ball and the electrode plate of the micro-electrode respectively furl according to demands, thus reducing abrasion, shortening the length of an apparatus and reducing the cost; besides, the social and economic benefits are excellent.

Description

1. Technical field: [0001] The invention relates to a pushing mechanism of a borehole, a microsphere, and a microelectrode used in well logging, in particular to a pushing device for a borehole, a microsphere, and a microelectrode with a single drive, double retraction, and four arms. 2. Background technology: [0002] At present, there are mainly two types of pushing mechanisms for boreholes, microspheres and microelectrodes used in combined logging: [0003] ① Borehole diameter + microelectrode pushing mechanism: The borehole diameter measurement arm and the microelectrode plate are driven by a motor to open and close at the same time. During the logging process, when measuring the borehole diameter, even if the microelectrode is not measured, the microelectrode pad is always in the open state. Since the borehole diameter measurement section is much larger than the microelectrode measurement section, the microelectrode pad is in contact with the well logging process. Unne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B47/08E21B49/00
Inventor 郭良杰魏凯曹巍贲放夏升旺刘鹤龄贾明龙
Owner THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP