CN110080732B - Mechanical control water distributor - Google Patents

Abstract

The invention belongs to the field of oil field downhole tools, and in particular relates to a mechanically controlled water distributor, which includes a water distributor shell and a valve core installed in the water distributor shell, a valve stem, a spring and a guide sleeve are packaged in the installation body through a pressure cap, and the pressure cap Connected to the installation body by thread, the valve head is kept away from the movement trend of the guide sleeve under the action of the spring, the inner wall of the guide sleeve is provided with a guide slideway A, and the valve stem is fixedly arranged with the The guide pin corresponding to the guide slideway A, the upper end of the valve stem is fixed with a bent part, and the bent part protrudes from the inner wall of the upper liner after passing through the strip hole on the side of the upper liner. The invention adopts the driving form of the spool based on the guide slideway of special structure, and the spool is switched between the two states of switching by repeatedly lifting the driver of the spool. The operation process is simple, the reliability is high, the failure rate is low, and it is easy to implement.

Description

A mechanically controlled water distributor

technical field

The invention belongs to the field of oil field downhole tools, in particular to a mechanically controlled water distributor.

Background technique

The water distributor is a downhole tool that must be used in the implementation of the oilfield water injection process. The water distributor is provided with a plug, and the plug is provided with a valve structure. The traditional mechanical plug needs to take out the plug in the water distributor through the fisher to realize the switch of the valve structure. However, the structure of the water distributor based on the plug structure is complicated during the fishing process, and frequent faults occur during operation. Serious Affect the operating efficiency, so it is necessary to design a new type of water distributor.

Contents of the invention

The present invention provides a mechanically controlled water distributor to solve the problems raised in the background art above.

The technical problem solved by the present invention adopts following technical scheme to realize:

The invention includes a water distributor shell and a valve core installed in the water distributor shell. The structure of the water distributor shell includes an upper joint, an upper cylinder, an installation main body, a lower cylinder and a lower joint connected by threads from top to bottom. The valve core is installed in an axial hole on the installation main body, and the side of the installation main body is provided with a liquid passage hole corresponding to the valve core, and also includes a valve core driver;

An upper liner is provided between the upper joint and the installation body, and the upper and lower ends of the upper liner are respectively inserted into the seams inside the upper joint and the installation body. The structure of the valve core includes a valve head and a valve stem. The valve head and the valve stem are integrated structure, the valve stem is covered with a pressure cap, spring and guide sleeve, the valve stem, spring and guide sleeve are packaged in the installation body through the pressure cap, and the pressure cap is connected to the installation body through threads. The valve head is kept away from the movement trend of the guide sleeve under the action of the spring, the inner wall of the guide sleeve is provided with a guide slideway A, and the valve stem is fixedly provided with a guide pin corresponding to the guide slideway A, The upper end of the valve stem is fixed with a bent part, and the bent part protrudes from the inner wall of the upper liner after passing through the strip hole on the side of the upper liner;

After the spool reciprocates in the axial direction, the spool can be switched between the valve opening state and the valve closing state under the cooperation of the guide slideway A and the guide pin;

The spool driver has a cylindrical structure as a whole, and a guide slideway B is provided on the cylindrical surface, and the end of the bending part is inserted into the guide slideway B and slides along the guideway B.

The structure of the guide slideway A includes a dead point A, a dead point B, a dead point C and a dead point D. When the guide pin is located at the dead point A, the spool is at the valve closing position, and the spool is lifted up at this time. The guide pin reaches the dead point B under the guidance of the guide slideway A. At this time, the valve core is released, and the valve core reaches the dead point C under the elastic force of the spring, so that the valve core is switched to the valve opening position, and at this time, it goes up again. Lifting the spool, the guide pin reaches the dead point D under the guidance of the guide slide A, at this time the spool is released, and the spool returns to the dead point A under the elastic force of the spring, thereby switching the spool to the closed position. valve position.

The structure of the guide slideway B includes an upper inlet, a lower inlet, a dead point E and a dead point F. When the valve core driver moves from the upper side to the bending part, the end of the bending part enters the guide slideway from the lower inlet. B, then reach the dead point E under the guidance of the guide slideway B, at this time lift the valve core switch, the end of the bending part reaches the dead point F under the guidance of the guide slideway B, then lower the valve core switch, the end of the bending part is guided by the guide slide B and slides out from the upper inlet, so that the whole valve core switch can go over the bending part in the downward direction and reach below the bending part. Lift the spool switch again, and when passing the end of the bending part, the end of the bending part enters the guide slideway B from the upper entrance, and directly from the lower entrance under the guidance of the guide slideway B. The inlet is slid out so that the whole of the spool switch can go over the bent portion in an upward direction and reach above the bent portion.

The guide sleeve is divided into two parts along the axial direction, and a guide slideway A is arranged on the inner side of each part.

The beneficial effects of the present invention are as follows: the present invention adopts the drive form of the valve core based on the special structure guide slideway, and the valve core is switched between the two states of switching by repeatedly lifting the valve core driver, the operation process is simple, and the reliability is high. Low failure rate and easy implementation.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the plane unfolded structure of the guide slideway B;

Fig. 3 is a schematic diagram of the plane unfolded structure of the guide slideway A;

Partial enlarged view at A in Fig. 4.

In the figure: 1-upper joint, 2-upper cylinder, 3-installation main body, 4-lower cylinder, 5-lower joint, 6-upper liner, 7-fluid hole, 8-valve head, 9-valve Rod, 10-bending part, 11-strip hole, 12-dead point A, 13-dead point B, 14-dead point C, 15-dead point D, 16-upper entrance, 17-lower entrance, 18- Dead point E, 19-dead point F, 20-spring, 21-guide pin, 22-guiding sleeve, 23-press cap, 24-spool driver, 25-cable.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing:

This embodiment includes a water distributor housing and a valve core installed in the water distributor housing. The structure of the water distributor housing includes an upper joint 1, an upper cylinder body 2, an installation body 3, and a lower cylinder body 4, which are sequentially threaded from top to bottom. And the lower joint 5, the valve core is installed in an axial hole on the installation body 3, and the side of the installation body 3 is provided with a liquid hole 7 corresponding to the valve core. The above is a common structure in the prior art, and will not be repeated here.

The innovation of the present invention is that it also includes a spool driver 24 with a guide slide B. By repeatedly lifting the spool driver 24 to switch the spool between the two states of switch, the operation process is simple, the reliability is high, the failure rate is low, and the implementation is easy.

Based on the above technical ideas, the structure of the spool and its related accessories is as follows:

An upper liner 6 is arranged between the upper joint 1 and the installation body 3, and the upper and lower ends of the upper liner 6 are respectively inserted into the seams inside the upper joint 1 and the installation body 3. The structure of the valve core includes The valve head 8 and the valve stem 9, the valve head 8 and the valve stem 9 are of an integrated structure, the valve stem 9 is covered with a pressure cap 23, a spring 20 and a guide sleeve 22, and the valve stem 9, the spring 20 and the guide sleeve 22 pass through the pressure cap 23 is packaged in the installation body 3, the pressure cap 23 is screwed on the installation body 3, the valve head 8 is kept away from the movement trend of the guide sleeve 22 under the action of the spring 20, and the inner wall of the guide sleeve 22 is provided with Guide slideway A, the valve stem 9 is fixed with a guide pin 21 corresponding to the guide slideway A, the upper end of the valve stem 9 is fixed with a bent part 10, and the bent part 10 passes through the upper lining The strip hole 11 on the side of the pipe 6 stretches out from the inner wall of the upper lining pipe 6 .

After the valve core reciprocates in the axial direction, the valve core can be switched between two states of valve opening and valve closing under the cooperation of the guide slideway A and the guide pin 21 . The specific principle is: as shown in Figure 3, the left end of the figure corresponds to the upper end of the guide sleeve 22, and the right end of the figure corresponds to the lower end of the guide sleeve 22, and the structure of the guide slideway A includes a dead point A12, a dead point B13, and a dead point C14 and dead point D15, when the guide pin 21 is at the dead point A12, the spool is in the valve closing position (i.e. the position shown in Figure 1), and the spool is lifted at this time, and the guide pin 21 is guided by the guide slideway A. Down to the dead point B13, at this time the spool is released, and the spool reaches the dead point C14 under the elastic force of the spring 20, so that the spool is switched to the valve opening position. At this time, the spool is lifted again, and the guide pin 21 reaches the dead point D15 under the guidance of the guide slideway A, at this time, the spool is released, and the spool returns to the dead point A12 under the elastic force of the spring 20, thereby switching the spool to the valve closing position. It should be noted that the guide sleeve 22 must be able to rotate freely with the change of the axial position of the guide pin 21 during the reciprocating movement of the valve rod 9, therefore, the pressure cap 23 cannot completely compress the guide sleeve 22, And must guarantee that guide sleeve 22 rotates smoothly. In addition, lubricating oil can be applied on the outer surface of the guide sleeve 22 to further ensure smooth movement.

The function of the spool driver 24 is to lift the bending portion 10 through the spool driver 24 to drive the spool to reciprocate up and down, and finally realize the switch state of the spool. The spool driver 24 has a cylindrical structure as a whole, and a guide slide B is provided on the cylindrical surface, and the end of the bending part 10 is inserted into the guide slide B and slides along the guide slide B.

The structure of the guide slideway B includes an upper inlet 16, a lower inlet 17, a dead center E18 and a dead center F19. The inlet 17 enters the guide slideway B, and then reaches the dead point E18 under the guidance of the guide slideway B. At this time, the spool switch 24 is lifted up, and the end of the bending part 10 reaches the dead point under the guidance of the guide slideway B. Point F19, at this time, if the spool driver 24 continues to be lifted up, the bending part 10 at the dead point F19 will be lifted up, thereby realizing the lifting of the spool. After the lifting is completed, the valve core switch 24 is lowered, and the end of the bending part 10 slides out from the upper inlet 16 under the guidance of the guide slide B, so that the whole valve core switch 24 can be moved in the downward direction. Cross over the bent portion 10 and reach below the bent portion 10 . After the spool driver 24 crosses the spool driver 24, there are two follow-up actions, one is to continue down, to open or close the water distributor of the next stage, the action process is the same as the above-mentioned process, and the other is to lift up the well and go up When the well is lifted out, when the spool switch 24 passes through the end of the bending part 10, the end of the bending part 10 enters the guide slideway B from the upper inlet 16, and is guided by the guide slideway B directly from the The lower inlet 17 is slid out, so that the entirety of the spool switch 24 can cross the bending portion 10 in an upward direction and reach above the bending portion 10 .

The guide sleeve 22 is divided into two parts along the axial direction, and the two parts are fastened together to form a complete cylindrical structure. A guide slideway A is arranged on the inner side of each part, that is, there are two guideway slideways A in total.

Both the guide slideway A and the guideway slideway B are processed by milling.

There are at least three guide slides B, the number of upper entrances 16 and lower entrances 17 is the same as the number of guide slides B, and two adjacent upper entrances 16 (lower entrances 17) are connected by sharp corners. It can ensure that the end of the bent portion 10 can enter the upper entrance 16 or the lower entrance 17 smoothly from any orientation.

Claims (2)

1. A mechanically controlled water distributor, including a water distributor housing and a valve core installed in the water distributor housing. The structure of the water distributor housing includes an upper joint (1) and an upper cylinder (2) connected by threads from top to bottom. ), the installation body (3), the lower cylinder body (4) and the lower joint (5), the valve core is installed in an axial hole on the installation body (3), and the installation body (3) The side is provided with a liquid passage hole (7) corresponding to the valve core, which is characterized in that: it also includes a valve core driver (24); An upper liner (6) is arranged between the upper joint (1) and the installation body (3), and the upper and lower ends of the upper liner (6) are respectively inserted into the upper joint (1) and the installation body (3) In the inner seam, the structure of the valve core includes a valve head (8) and a valve stem (9). (23), spring (20) and guide sleeve (22), valve stem (9), spring (20) and guide sleeve (22) are encapsulated in the installation main body (3) by pressing cap (23), and pressing cap (23 ) is threaded on the installation body (3), the valve head (8) keeps away from the movement trend of the guide sleeve (22) under the action of the spring (20), and the inner wall of the guide sleeve (22) is provided with guide slideway A, the valve stem (9) is fixedly provided with a guide pin (21) corresponding to the guide slideway A, the upper end of the valve stem (9) is fixed with a bending part (10), bent The folding part (10) protrudes from the inner wall of the upper lining pipe (6) after passing through the strip-shaped hole (11) on the side of the upper lining pipe (6); After the valve core reciprocates in the axial direction, the valve core can be switched between the two states of valve opening and valve closing under the cooperation of the guide slideway A and the guide pin (21); The spool driver (24) has a cylindrical structure as a whole, and a guide slideway B is arranged on its cylindrical surface, and the end of the bending part (10) is inserted in the guide slideway B and slides along the guide slideway B; The structure of the guide slideway A comprises dead point A (12), dead point B (13), dead point C (14) and dead point D (15), and the described guide pin (21) is positioned at dead point A ( 12), the spool is at the valve closing position. At this time, the spool is lifted up, and the guide pin (21) reaches the dead point B (13) under the guidance of the guide slide A. At this time, the spool is released, and the spool is in the The elastic force of the spring (20) reaches the dead point C (14), thereby switching the valve core to the valve opening position. At this time, the valve core is lifted up again, and the guide pin (21) arrives under the guidance of the guide slide A. Dead point D (15), at this time the spool is released, and the spool returns to the dead point A (12) under the elastic force of the spring (20), thereby switching the spool to the valve closing position; The structure of the guide slideway B includes an upper inlet (16), a lower inlet (17), a dead point E (18) and a dead point F (19), and the spool driver (24) moves from the upper side to the bent (10), the end of the bending part (10) enters the guide slideway B from the lower inlet (17), and then reaches the dead point E (18) under the guidance of the guide slideway B, at this time, the spool switch is lifted up device (24), the end of the bending part (10) reaches the dead point F (19) under the guidance of the guide slide B, at this time, the spool switch (24) is lowered, and the bending part (10) Under the guidance of the guide slide B, the end of the spool slides out from the upper inlet (16), so that the whole body of the spool switch (24) can cross the bending part (10) in the downward direction and reach the bending part (10) Below, lift the spool switch (24) again at this time, when passing through the end of the bending part (10), the end of the bending part (10) enters the guide slideway B from the upper entrance (16) , and directly slide out from the lower inlet (17) under the guidance of the guide slideway B, so that the whole body of the valve core switch (24) can cross the bending part (10) in the upward direction to reach the bending ( 10) Above the Ministry. 2. A mechanically controlled water distributor according to claim 1, characterized in that: the guide sleeve (22) is divided into two parts along the axial direction, and a guide slideway A is arranged on the inner side of each part.