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An anti-jamming device for downhole probes

A technology of hydraulic probes and protection devices, applied in construction and other directions, can solve problems such as instrument looseness, and achieve the effect of preventing backflow and overflow

Active Publication Date: 2017-06-30
武汉海阔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide an anti-jamming device for downhole probes. The pin activates the anti-jamming device, so that the pressure in the system drops, and the pusher is retracted, thereby further loosening the instrument and lifting it to the ground, effectively avoiding losses caused by well jamming during the logging process

Method used

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Embodiment Construction

[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0018] The embodiment of the present invention provides an anti-jamming device for downhole probes. The entire device is cylindrical in shape and includes: an upper housing 1 for connecting with the upper end of the hydraulic probe, a lower housing 5 for connecting with the lower end of the hydraulic probe, The fixed block 2, the one-way valve protection device, the upper casing 1, the lower casing 5, and the fixed block 2 are socketed together, the fixed block 2 and the upper casing 1 are fastened by screws 9, and the upper casing The body 1 and the lower case 5 are fixed by the safety pin 3, the lower end of the upper case 1 is provided with a fixed pin 4, and the lower case 5 corresponding to the fixed pin 4 is provided with a stop for limiting th...

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Abstract

The invention relates to the field of well logging technology, and provides an anti-jamming device for downhole probes, which relies on a pressure relief device in the middle of the high-pressure oil circuit, and cuts off the safety pin when the axial force of the hydraulic probe reaches a certain value. The one-way valve, when the oil circuit is in a connected state during normal operation, does not affect the normal flow of liquid. In case of emergency, it can cut off the internal oil circuit of the probe in time, effectively avoiding a large amount of hydraulic oil inside the hydraulic probe from overflowing, and effectively preventing the backflow of downhole well fluid.

Description

technical field [0001] The invention relates to the technical field of well logging, in particular to an anti-jamming device for downhole probes. Background technique [0002] At present, the pusher is used in more and more logging instruments. The control methods of the common logging instrument pusher can be divided into two types, one is mechanical push, the other is hydraulic push; The pusher mostly uses the motor to drive the screw to drive the connecting rod mechanism to realize the opening and closing of the pusher, and the hydraulic pusher mostly uses the free movement of the piston driven by the pressure oil in the hydraulic oil circuit to realize the opening and closing of the pusher; the hydraulic pusher The hydraulic pump, hydraulic valve and other key components are involved in the device. Compared with the screw rod, these components have insufficient reliability and stability. However, in terms of the pushing force of the pusher, the pushing force of the hydra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/017
Inventor 覃军杨芬李金亮
Owner 武汉海阔科技有限公司