Core pushing control valve
A technology of control valve and valve seat, applied in the direction of control valve, valve details, valve device, etc., can solve the problem of not meeting the needs of the reverse deduction card, and achieve the effect of improving safety
Active Publication Date: 2014-01-08
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the deficiency that the current automatic pushing of the core after receiving the position cannot meet the needs of reverse pushing and releasing the card in an emergency
Method used
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[0016] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0017] Such as figure 1 with figure 2 As shown, the second end of the spool 1 is connected to the first end of the control valve stem 2 through threads. Wherein the end surface of the first end of the control valve rod 2 is provided with a blind hole, and the outer surface of the second end of the valve core 1 and the inner surface of the blind hole on the first end of the control valve rod 2 are respectively provided with threads. The control valve stem 2 is set inside the adjustment joint 3, wherein the outer surface of the control valve stem 2 is provided with a sealing...
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The invention discloses a core pushing control valve and overcomes the shortcoming that sticking cannot be removed by a thrust reverser in an emergency because a core is automatically pushed after the conventional backup arm is withdrawn in place. According to the core pushing control valve, a second end of a valve core is connected with a first end of a control valve rod; the control valve rod is sleeved in an adjusting joint in a sealing mode; the valve core and the adjusting joint are positioned in a control valve seat; a second end of the control valve rod is positioned outside the adjusting joint and extends out of a second end of the control valve seat; a check ring is sleeved outside the valve core; the adjusting joint is pressed against the check ring; a spring is sleeved on the outer surface of the valve core and positioned between the first end of the valve core and the check ring; the inner surface of the control valve seat, which is positioned between the check ring and the first end of the valve core, is provided with a slope shrinking towards the center; the first end of the control valve seat is provided with a transverse hole; and a radial side wall hole is formed on the side wall between the inner bottom of the control valve and the slope. By the core pushing control valve, effects that the backup arm can be withdrawn, and the core cannot be pushed when accidents such as sticking occur in the process of drilling the core are achieved, so that conditions are provided for removing sticking by using the thrust reverser.
Description
technical field [0001] The invention relates to stratum exploration well logging equipment, in particular to a push core control valve. Background technique [0002] The working process of the existing core pushing cylinder is to automatically push the core into the core storage barrel when the core is drilled from the stratum and pushed back into place. However, when accidents such as drill sticking occur during the coring process, it is necessary to withdraw the push arm to release the jamming of the reverse push instrument. At this time, there cannot be a core push action. [0003] But at present, regardless of whether the motor drills back in place, as long as the pusher is in place, it will automatically push the core, which cannot meet the needs of reverse pushing and releasing the card in an emergency. Contents of the invention [0004] The technical problem to be solved by the present invention is to overcome the deficiency that the current pusher automatically pu...
Claims
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IPC IPC(8): F16K15/18F16K31/12E21B49/00
Inventor 唐玉宏班志强刘力平赵江波张登鸣
Owner CHINA NAT OFFSHORE OIL CORP