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Bidirectional electric eccentric device

An eccentric, electric technology, used in surveying, wellbore/well components, earth-moving drilling, etc., can solve problems such as difficulty in passing, jamming, and inability to test, and reduce the risk of jamming.

Pending Publication Date: 2018-09-14
BEIJING JIEWEISITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing eccentric has the following limitations: First, the spring plate of the spring plate eccentric cannot be retracted, and it is difficult to pass through when the wellbore is small or the well condition is not good, and there is a risk of jamming
Second, ordinary electric eccentrics can only be measured upwards, not downwards
Third, the pushing force of ordinary eccentrics cannot be adjusted, so it has poor adaptability in well holes of different sizes

Method used

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  • Bidirectional electric eccentric device
  • Bidirectional electric eccentric device
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Examples

Experimental program
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Effect test

Embodiment Construction

[0018] Such as figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 The opening and closing legs of the instrument shown are driven by the motor (12) through the lead screw (25) and the lead screw nut (30) to drive the transmission rod (34) and the linkage rod (46) to perform linear reciprocating motion, and through the hinge (47) to drive the push rod. Arm (52) and (76) open and close leg.

[0019] The detection unit of the pushing force fixes the pull rod of the sensor (78) and the transmission rod (34) together through the connection block (82). The motor (12) drives the transmission rod (34) to move, and drives the pull bar of the sensor (78), the connecting arm fixed block (43) is fixed, and the transmission rod (34) compresses the spring (42) when moving. The travel range is limited by a limit switch (31). When the transmission rod (34) moves, the compression amount of the spring (42) will change accordingly, and the pushing force will change accordingly. The...

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Abstract

The invention relates to a bidirectional electric eccentric device. The bidirectional electric eccentric device is mainly composed of a circuit control unit, a push force detecting unit, a push unit and a bottom direction adjusting unit. The bidirectional electric eccentric device, with a maximum diameter of 3.625 inches (92 mm) and a length of 3.3 meters, is used for helping loggers which are needed to be eccentrically attached to well walls to conduct logging, such as a compensating neutron logging instrument and a lithology density logging instrument. The bidirectional electric eccentric device has the characteristics of achieving the upper measurement and lower measurement of the instrument under the eccentric condition.

Description

technical field [0001] The invention relates to a two-way electric eccentric device, which belongs to the field of petroleum exploration and development, and is used for compensating neutron logging tools, lithology density logging tools and other instruments that need eccentricity close to the well wall logging. In the case of eccentricity, the instrument measures up and down. Background technique [0002] The existing eccentric has the following limitations: first, the spring plate of the spring plate eccentric cannot be retracted, and it is difficult to pass through when the borehole is small or the well condition is not good, and there is a risk of jamming. Second, ordinary electric eccentrics can only be measured upwards, not downwards. Thirdly, the pushing force of the common eccentric is not adjustable, so it has poor adaptability in different sizes of boreholes. Contents of the invention [0003] The purpose of the present invention is to provide a two-way electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12E21B49/00
CPCE21B47/12E21B49/00
Inventor 吴东
Owner BEIJING JIEWEISITE TECH CO LTD
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