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Hydraulic motor and its anti-blocking device

A hydraulic motor and anti-blocking technology, applied in wellbore/well components, earth-moving drilling, flushing wellbore, etc., can solve the problem of easy blockage of the hydraulic drive mechanism, and achieve the effect of solving easy blockage

Active Publication Date: 2020-12-04
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-blocking device to solve the problem of easy blockage in the prior art after the hydraulic drive mechanism stops working. In addition, the purpose of the present invention is to provide a hydraulic motor using the anti-blocking device

Method used

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  • Hydraulic motor and its anti-blocking device
  • Hydraulic motor and its anti-blocking device

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Experimental program
Comparison scheme
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specific Embodiment 2

[0044] Specific embodiment 2 of the hydraulic motor of the present invention, the structure of the hydraulic motor is simplified in this embodiment, the hydraulic motor includes a rotor and an anti-blocking device arranged at the liquid inlet of the rotor, and the anti-blocking device includes a sand-proof The sand control cylinder and the central pipe connected to the liquid inlet of the hydraulic drive mechanism are arranged in the sand control cylinder. The annular space between the central pipe and the sand control cylinder constitutes a grit chamber. The sand control one-way valve structure connects the center pipe and the sand control chamber when the supply of driving power medium is stopped and closes the center pipe and the sand control chamber. By setting the sand control one-way valve structure, when the hydraulic motor stops running, the central pipe and the grit chamber are closed, preventing impurities in the grit chamber from entering the central pipe and then in...

specific Embodiment 3

[0045] Specific embodiment 3, as a further optimization of specific embodiment 2, the sand control one-way valve structure includes a sand control piece that is slidably matched with the center pipe for being driven by the pressure of the driving power medium when the driving power medium is supplied, and the sand control piece and the center pipe The sliding mating surface of the sliding fit is provided with a sand control hole, and the sliding mating surface of the central pipe and the sand control member is provided with a central pipe hole for communicating with the sand control hole so that the central pipe and the sand control cavity are connected. When the driving power medium is supplied, the pressure of the driven power medium slides relative to the center pipe so that the center pipe hole communicates with the sand control hole. Elastic piece closed with sand control hole. Certainly, in other embodiments, the one-way valve structure may also be a one-way valve or a p...

specific Embodiment 4

[0046] Specific embodiment 4, as a further optimization of specific embodiment 3, the sand control element is sleeved on the central pipe. Of course, in other embodiments, the sand control element can also be installed in the center pipe, and the sand control element is slidingly fitted with the inner pipe wall of the center pipe.

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Abstract

The invention provides a hydraulic motor and an anti-blocking device thereof, and belongs to the technical field of downhole hydraulic equipment. The anti-blocking device comprises a sand prevention cylinder and a central pipe arranged in the sand prevention cylinder and communicating with a liquid inlet of a hydraulic driving mechanism; an annulus between the central pipe and the sand preventioncylinder constitutes a sand sinking cavity; and the central pipe is provided with a sand prevention one-way valve structure which enables the central pipe and the sand prevention cavity to communicatewhen a driving power medium is supplied and enables the central pipe and the sand prevention cavity to be closed when the driving power medium is stopped to be supplied. By arranging the sand prevention one-way valve structure, when the hydraulic motor stops operating, the central pipe and the sand sinking cavity are closed, thus the situation that impurities in the sand sinking cavity enter thecentral pipe to damage and block the hydraulic driving mechanism is avoided, and the problem that in the prior art, a hydraulic driving mechanism is prone to being blocked after stopping working is solved.

Description

technical field [0001] The invention relates to a hydraulic motor and an anti-blocking device thereof. Background technique [0002] The screw motor is a kind of power drilling tool often used in oilfield downhole construction. It depends on the ground pump to work in the well and also enters the screw motor. A certain pressure difference is formed at the inlet and outlet of the motor to drive the motor rotor to rotate, and the torque and speed are passed through the universal The shaft and transmission shaft are transmitted to the drill bit for drilling, milling and milling operations in the well to achieve the purpose of completing the construction. In the process of using the screw motor, although various preventive measures have been taken, such as ground filtration, downhole filtration and sedimentation filtration, etc., due to the unclean working fluid used or too much debris in the wellbore, the screw motor often occurs during construction. Inability to work or the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B21/00
CPCE21B21/00
Inventor 蒋新立贾光亮郑道明马成云李晔旻左睿温伟
Owner 中石化石油工程技术服务有限公司