Suction valve with opening mechanism

Abstract

FIELD: oil production.SUBSTANCE: invention relates to oil production in borehole pumping units and is intended to organize the injection of an agent in one direction, and during the production of heated highly viscous oil in the opposite direction. A suction valve with an opening mechanism for pumping a working agent through a borehole pump with subsequent extraction of a highly viscous oil-comprising liquid comprises a body 2 with an internal through-hole axial opening, a seat 3 and a ball 7 adapted for closing the through-hole section of the seat 3 in the production mode and forcibly opening the through-hole section of the seat 3 in the injection mode. The housing 2 comprises windows 5, which provide for pumping the agent into the formation in one direction and extracting the liquid in the opposite direction, and a spring-loaded switch 6 located in the axial opening, comprising a mode lock 8, a rotator 9 and a cage with a spring-loaded ball 7. A stop 10 is installed on the upper part of the body 2. The body 2 with the stop 10 and the lock 8 with the rotator 9 installed on the switch 6 are made oriented synchronized and can switch the suction valve with the opening mechanism to the pumping mode due to the interaction of the stop 10 and the rotator 9 with the opening key 14 of the suction valve and to the extraction mode due to the interaction of the rotator 9 with the activation key 15 of the suction valve, located on the plunger of the pump.EFFECT: cyclically changing the operating mode of the valve, pumping the agent through the pump after removing the plunger by switching to the injection mode, significantly increasing the number of CSS-production cycles, where STP is steam cyclic processing.1 cl, 2 dwg

Description

[0001] The invention is used in the oil production industry in borehole pumping units and is intended to organize the injection of a working agent in one direction, and when producing heated, high-viscosity oil - in the opposite direction; it is used in vertical, directional and horizontal oil wells.

[0002] A differential sucker-rod pump is known (see patent RU 95368 U1, F04B 47 / 00, 2006.01), which contains a cylinder connected to a column of pump pipes, in which plungers connected to the column of pump rods are installed, wherein the upper plunger of a larger diameter has a through channel and is provided with a discharge valve, and the lower plunger is made in the form of a monolithic rod, wherein the annular space enclosed between the walls of the cylinder and the surface of the rod forms the working chamber of the pump with a suction valve made in the form of a plate coaxial with the cylinder with an opening through which a monolithic rod is hermetically passed, characterized in that the discharge valve is made in the form of a rod-valve with a pusher interacting with a plunger, connected at the top to the column of rods, and at the bottom - to the monolithic rod, wherein the valve is made in the form coaxial with the plunger of the plate and located below the plunger, and the pusher is located above the plunger,wherein the distance between the valve and the pusher is selected in such a way that the flow section between the end of the plunger and the valve is not less than the flow section between the rod and the inner surface of the plunger.

[0003] The disadvantage of this invention is the loss of tightness of the unit consisting of the plunger 9 and the plate suction valve 10 as a result of wear of the plunger 9, made in the form of a monolithic rod (significant length 3...5 m and small diameter 28...32 mm) and the hole in the plate suction valve 10 along which the plunger 9 moves.

[0004] A differential sucker-rod pump is known (see patent RU 39366 U1, F04B 47 / 00, 2000.01), which contains a housing connected to a column of pump pipes, in which a differential plunger is installed connected to the column of pump rods, wherein the upper stage of the plunger of a larger diameter has a through channel and is equipped with a discharge valve, and the lower stage of the plunger of a smaller diameter is made in the form of a monolithic rod, wherein the annular space enclosed between the walls of the cylinder of the housing and the surface of the lower stage of the plunger forms a working chamber of the pump with a suction valve, characterized in that the suction valve is made coaxially with the cylinder in the form of a plate with an opening through which the monolithic rod passes hermetically.

[0005] The disadvantage of this invention is the loss of tightness of the unit consisting of the monolithic rod 9 and the suction valve 12 as a result of wear of the monolithic rod 9 (significant length 3...5 m and small diameter 28...32 mm) and the seal of the suction valve 12 in which the monolithic rod 9 moves.

[0006] A sucker rod pump for producing high-viscosity oil is known (see patent RU 55892 U1, F04B 47 / 00, 2006.01), which contains a cylinder, a suction valve with a seat, a plunger, a discharge valve stem with a pusher interacting with the plunger, characterized in that the suction valve is made normally closed and pressed against the seat, and the valve stem is rigidly connected to a column of rods through a pusher, which is installed in the plunger with the possibility of limited axial movement.

[0007] The disadvantage of this invention is the impossibility of pumping the working agent through the pump after removing the plunger 5, since the suction valve 2 is closed in this direction.

[0008] The analysis of technical solutions has shown that a valve device for borehole sucker rod pumps is known, which is the closest technical solution. A valve device for borehole sucker rod pumps, comprising a cylindrical body with an axial opening, in which a suction and a discharge valve are installed, each of which has a seat and a ball, a stem located under the discharge valve and rigidly connected to a cup spring-loaded upwards relative to the body, a pusher and a wedge installed with the possibility of interacting with the ball of the suction valve, characterized in that a longitudinal channel with a side opening at the bottom for the wedge is made in the body above the seat of the suction valve, and the pusher is made in the form of a rod, which is rigidly connected from above to the cup and inserted into the channel with the possibility of limited longitudinal movement, wherein the wedge is made with the possibility of interacting with the upper edge of the side opening when the pusher moves upward (see.patent RU 2366832 C1, F04B47 / 00, 09 / 10 / 2009).

[0009] The disadvantage of this invention is the impossibility of opening the full flow section under the ball, the lack of the possibility of washing the spring and the high probability of it jamming when turning during operation of the wedge pos. 20.

[0010] The technical result that can be obtained by implementing the proposed invention is as follows:

[0011] - the ability to cyclically change the valve operating mode;

[0012] - the ability to pump the working agent through the pump after removing the plunger by switching to the “Pumping” mode;

[0013] - the ability to significantly increase the number of “STP-mining” cycles, where STP is steam cyclic processing.

[0014] The technical essence, design and operating principle of the suction valve with opening mechanism are explained in the following drawings:

[0015] Fig. 1 - Suction valve with opening mechanism in the "Production" mode.

[0016] Fig. 2 - Suction valve with opening mechanism in the "Inflation" mode.

[0017] The suction valve with opening mechanism consists of a housing 1 with an internal axial bore, the upper portion of which has a connecting thread for connection to the pump cylinder via an extension. The lower portion of housing 1 contains a thread into which the housing of suction valve 2 is screwed. The lower portion of the housing of suction valve 2 contains a thread with a cylindrical bore and a stop, where seat 3 is installed, pressed by locking device 4. The housing of suction valve 2 contains windows 5 through which the working fluid is pumped into the formation in one direction, while fluid is extracted in the opposite direction. In the upper part of the body of the suction valve 2 there is an axial hole in which a switch 6, spring-loaded by a spring 12, is located, in the lower part of which there is a cage with a ball 7, spring-loaded by a spring 11, and the ball 7 in the “Extraction” mode (Fig. 1) closes on the seat 3, and in the “Injection” mode (Fig. 2) it is forcibly opened.Switch 6 contains mode lock 8. Above mode lock 8 on switch 6, rotator 9 is located, and on the upper part of the housing of suction valve 2, stop 10 is installed, wherein the housing of suction valve 2 with stop 10 and mode lock 8 with rotator 9 installed on switch 6 have oriented synchronization.

[0018] The suction valve with opening mechanism works as follows.

[0019] - after lowering and installing the assembly consisting of a packer and a borehole sucker rod pump (the suction valve with an opening mechanism in the "production" mode (Fig. 1), the channel 16 for passing the flow into the well is closed, the ball 7 contacts the seat 3), the opening key of the suction valve 14 is lowered, which, interacting with the stop 10 and the rotator 9, switches with fixation the suction valve with the opening mechanism into the "pumping" mode (Fig. 2), i.e. the flow channel 17 opens for pumping the working agent into the well (the ball 7 does not contact the seat 3);

[0020] - the suction valve opening key 14 is removed;

[0021] - after the completion of the pumping of the coolant into the well, the plunger with the activation key of the suction valve 15 is lowered, which, due to rotation and interaction with the rotator 9, switches the suction valve with the opening mechanism from the “pumping” mode (Fig. 2) to the “production” mode (Fig. 1), i.e. the flow channel 17 for pumping the working agent into the well is closed (the ball 7 contacts the seat 3 and works as a suction valve), after which it is possible to extract liquid through the channel 16.

Claims

A suction valve with an opening mechanism for pumping a working agent through a borehole pump with subsequent extraction of a high-viscosity oil-containing liquid, comprising a housing with an internal axial through-hole, a seat and a ball installed with the possibility of closing the through-hole section of the seat in the "production" mode and forcibly opening the through-hole section of the seat in the "injection" mode, characterized in that the housing of the suction valve contains windows that provide the possibility of pumping the working agent into the formation in one direction and extracting the liquid in the opposite direction, and a spring-loaded switch located in the axial hole, containing a mode lock, a rotator and a cage with a spring-loaded ball, wherein a stop is installed on the upper part of the housing of the suction valve,wherein the body of the suction valve with the stop and the mode lock with the rotator installed on the switch are made oriented synchronized and have the ability to switch the suction valve with the opening mechanism to the "pumping" mode due to the interaction of the stop and the rotator with the opening key of the suction valve and to the "extraction" mode due to the interaction of the rotator with the activation key of the suction valve, located on the plunger of the pump.

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