SU1668728A1 - Deep-well bull pump - Google Patents

Abstract

The invention relates to an oil production technique, in particular, to well sucker-rod pumps, and can be used in the operation of oil wells. The purpose of the invention is to increase the reliability and enhance the functionality of a well pumping pump by providing the possibility of performing various kinds of underground repair operations associated with periodic forced opening and closing of the suction valve. The downhole sucker-rod pump contains a cylinder 1 with a suction valve 2, a plunger with a discharge valve. The seat 4 of the valve 2 and the cylinder 1 are connected to the hollow body 6, on which the sleeve 11 is located with the possibility of angular movement. It is provided with elastic elements 14 with rollers 15, the sharp edges of which interact with the inner surface of the production string 16. The control mechanism of the suction valve includes a pusher 26 with two axes 19 and 20, on which the rollers 21 are located. The rollers mounted on the axis 19 interact with the cam 22 with an even number of equally spaced cavities, the rollers on the axis 20 - with the sleeve 24, mounted on the sleeve 1 1. Between the cam 22 and the sleeve 24 is a compression spring 25. 4 Il.

Description

the cylinder 1 is connected to a hollow body b, on which the sleeve 11 is located with angular movement. It is provided with elastic elements 14 with rollers 15, the sharp edges of which interact with the inner surface of the production string 16. The control mechanism of the suction valve includes a pusher 26 with two axes 19 and 20, on which the rollers 21 are located. The rollers mounted on the axis 19 interact with the cam 22 with an even number of equally spaced cavities, the rollers on the axis 20 - with the sleeve 24, mounted on the sleeve 11. Between the cam ohm 22 and bushing 24 is a compression spring 25. 4 or

The invention relates to an oil production technique, in particular, to well sucker-rod pumps, and can be used in the operation of oil wells.

The purpose of the invention is to increase the reliability and enhance the functionality of a sucker-rod downhole pump by allowing various types of underground repair operations associated with the periodic forced opening and closing of the suction valve.

FIG. 1 schematically shows a longitudinal section of a downhole sucker-rod pump installed in a production string of a well; in fig. 2 is a section A - A in FIG. one; in fig. 3 - section B - B in FIG. 2; in fig. 4 is a view of B in FIG. 3

The downhole sucker-rod pump contains a cylinder 1 with a suction valve 2 in its lower part consisting of cage 3, seat 4 and a locking element — ball 5. In cylinder 1 there is a plunger and a discharge valve (not shown). A hollow body 6 is connected with the cylinder 1 and the cage 3, on the outer surface of which on across 7 on the upper 8 and lower 9 supports fastened with a pin 10 there is installed a sleeve 11. In the upper part of the sleeve 11, elastic elements 14 are attached to the upper part of the sleeve 11, the ends of which are installed rollers 15. having sharp edges and interacting with the production string 16. In the lower part of the hollow body 6 there are longitudinal grooves 17 and 18. playing the role of guide axes 19 and 20, respectively. Each axis is provided with rollers 21, the rollers mounted on axis 19 cooperating with cam 22 connected to sleeve 11 by pin 23 (FIG. 2), and the rollers mounted on axis 20 interacting with sleeve 24 mounted on housing 6. Between a cam 22 and a sleeve 23 locate a spring 25 of compression, Axes 19 and 20 are fixed on the pusher 26. In the lower part of the sleeve 11 there is a washer 27. In the upper part of the cage

3, a rod 28 is provided to act on the ball of the discharge valve when the plunger is lowered to its lowest position. The cam 22 has four cavities evenly spaced around the circumference.

Well sucker rod pump works as follows.

When the plunger moves down suction; the closing valve 2 is closed and the discharge

the valve is open, the reservoir fluid flows from the cylinder cavity under the plunger into the cylinder cavity above the plunger. When the plunger moves upward, the discharge valve closes and the suction 2

opens - the formation fluid rises and the cavity of the cylinder 1 under the plunger is filled. Then the cycle of operation is repeated.

When performing technological operations of underground repair, such as flushing a well, requiring the forced opening of valves, the pump plunger is lowered all the way down. As a result, the rod 27 opens the discharge valve. To open the suction valve 2, the tubing string, on which cylinder 1 is suspended, is rotated clockwise by the angle at which rollers 21 will occupy cam 22

the position corresponding to their maximum upward movement (Fig. 3). The sleeve 11 at this time remains stationary relative to the production string 16. As the rollers 15 with sharp edges interact with the latter, the axis 19 moves upward in the groove 17 together with the pusher 26. The latter lifts the ball 5 of the suction valve 2 and thus opens it

regardless of the direction of fluid flow through it. To close the suction valve 2, the tubing string with the cylinder 1 is turned until the rollers 21 occupy the lower

5 position in the depressions of the cam 22 (Fig. 4). Under the action of the spring 25, the pusher 26 is lowered to the lower position and the ball 5

Claims (1)

is lowered onto the saddle A. By rotating the cylinder 1, it is possible to open and close the suction valve 2 as many times as necessary to perform the technological operations of the underground repair of the well. The Invention Formula A borehole sucker-rod pump comprising a cylinder with a suction valve located in its lower part and a hollow plunger placed in the cylinder with a discharge valve installed in its lower part, each valve being made in the form of a cage with a cage located in it. the valve seat and the locking element, as well as a hollow body connected to the receiving valve cell and the cylinder, on which the sleeve is angularly displaced, provided with elastic elements, at the ends of which are installed rollers having sharp edges and interacting with the inner surface of the production string, and the control mechanism of the suction valve, which includes a pusher with an axis and rollers, characterized in that, in order to increase reliability and enhance functionality by providing the possibility of performing various kinds of operations during the underground repair associated with the periodic forced opening and closing of the suction valve, the control mechanism further comprises a cam with an even number of equally-spaced cavities that are in constant contact with the rollers and connected to the sleeve, and the plunger is provided with an additional axis with a pair of rollers that interact with the reinforced on the body of the sleeve, while between the cam and the sleeve is a compression spring.