Single-driving and double-receiving four-arm well diameter, microsphere, microelectrode eccentering device

A pushing device and micro-electrode technology, which is applied in the direction of borehole/well components, measurement, earthwork drilling and production, etc., can solve the problems of long length, shortened plate life, and increased instrument cost, so as to improve the service life and reduce the cost of the well Cost of diameter measurement, effect of instrument length shortening

Inactive Publication Date: 2009-02-04
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 and double-receiving four-arm well diameter, microsphere, microelectrode eccentering device
  • Single-driving and double-receiving four-arm well diameter, microsphere, microelectrode eccentering device
  • Single-driving and double-receiving four-arm well diameter, microsphere, microelectrode eccentering device

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Experimental program
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Embodiment 1

[0033] Embodiment 1: The present invention is described further in conjunction with accompanying drawing:

[0034] basic composition

[0035] The basic structure is shown in Figure 1-Figure 3. In the figure, the support tube 1 is the basic support of the entire pushing device, and the central tube 2 is driven by a motor through a ball screw to reciprocate along the axial direction of the supporting tube 1, which is the entire pushing device. Provide pushing power; well diameter sleeve 3, active sleeve 26 are axially fixedly connected with center pipe 2; well diameter sliding plate 9, well diameter support plate 14, pole plate retracting sleeve 15, pole plate closing plate 19, pole plate retracting spring 16. The driven disk 24 can slide axially along the support pipe 1 and the center pipe 2;

[0036] Borehole push mechanism: borehole push mechanism consists of borehole casing 3, borehole measuring arm 6, borehole connecting rod 5, borehole push rod 7, borehole sliding plate 9...

Embodiment 2

[0050] Embodiment 2: Referring to Fig. 5-Fig. 10, this embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference lies in: under the condition that the borehole spring 12 guarantees the required elastic force, the borehole diameter is supported The fixed connection between the sleeve 14 and the support pipe 1 is changed to that the borehole support sleeve 14 can slide in the support pipe 1 with the opening and closing of the borehole diameter measuring arm 6. Tight state, can improve the service life of diameter spring 12.

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PUM

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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 the push 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 the well 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-opening well 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 tube and 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 Applications(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
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