Double-feedback fluid-control one-way throttle velocity modulation composite valve

A liquid-controlled one-way, throttling and speed-regulating technology, which is applied in the direction of wellbore/well valve devices, undisturbed core extraction devices, wellbore/well components, etc. Large and other problems, to achieve the effect of protecting the motor and preventing lateral deviation

Active Publication Date: 2009-01-21
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the borehole coring operation, ordinary throttle valves can only use manual adjustment of the throttle port to control the flow rate. Once the throttle port is set, the throttle port cannot change with changes in external resistance and movement speed. Therefore, dynamic control cannot be performed, and the volume is relatively large

Method used

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  • Double-feedback fluid-control one-way throttle velocity modulation composite valve
  • Double-feedback fluid-control one-way throttle velocity modulation composite valve
  • Double-feedback fluid-control one-way throttle velocity modulation composite valve

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Embodiment Construction

[0015] As shown in Figure 1, the present invention includes: a valve body 1, on which a first oil passage 4, a throttle port 11, and a second oil passage 5 for high-pressure oil inlet and outlet are sequentially arranged in series on the valve body 1, and There is a throttle valve 2 that controls the conduction or disconnection of the first oil passage 4 and the second oil passage 5 . A check valve 3 is further arranged in parallel between the first oil passage 4 and the second oil passage 5 .

[0016] As shown in Figures 1, 2 and 3, the throttle valve 2 includes a throttle valve core 14 and a throttle valve spring 13, one end of the throttle valve core 14 is inserted into the throttle port 11, and the throttle valve spring 13 is set On the throttle valve spool 14 , an elastic force away from the throttle port 11 is exerted on the throttle valve spool 14 , that is, the force in direction A in the figure.

[0017] The conduction or disconnection of the first oil circuit 4 and ...

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Abstract

The invention discloses a double feedback hydraulic control one-way throttle governing combination valve which comprises a valve body. A first oil channel and a second oil channel for passing high-pressure oil are connected in series on the valve body. The valve body is also provided with a throttle valve for switching on or off the first oil channel and the second oil channel, a one-way valve is arranged in parallel between the first oil channel and the second oil channel, and the valve body is also provided with two feedback oil ports for controlling the opening status of the throttle valve. The combination valve adopts two hydraulic pressure signals to control the size of a throttle orifice; the one-way valve and the throttle valve are integrated into a whole; the throttle valve works while doing the forward movement, and the one-way valve works while doing the backward movement; and the two pressure signals have no impact on the one-way valve. Thus, the throttle orifice works and the drilling rate is slower when a core is drilled during the coring process; and the one-valve works to realize rapid drilling and retreating when the rapid drilling and retreating is required.

Description

technical field [0001] The invention relates to a throttling and speed-regulating compound valve used in the operation process of well wall coring, in particular to a double-feedback liquid-controlled one-way throttling and speed-regulating compound valve. Background technique [0002] During the borehole coring operation, ordinary throttle valves can only use manual adjustment of the throttle port to control the flow rate. Once the throttle port is set, the throttle port cannot change with changes in external resistance and movement speed. Therefore, dynamic control cannot be performed, and the volume is relatively large. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a dual-feedback liquid-controlled one-way throttling and speed-regulating composite valve capable of dynamic control. [0004] In order to solve the above problems, the present invention provides a dual-feedback hydraulic control one-way throttli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/08E21B25/00
Inventor 田志宾欧阳剑代蕊
Owner CHINA NAT OFFSHORE OIL CORP
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