SU1208307A1 - Well hose pump - Google Patents

Description

ten

20

25

The invention relates to a technique for oil production, in particular, to well sucker-rod pumps, and can be used in the oil and gas industry when pumping formation fluids from wells.

The purpose of the invention is to reduce operational costs in the implementation of repair work by eliminating well killing and increasing productivity,

In FIG. 1, a downhole sucker rod pump is schematically represented, general view; in fig. 2 - section A-Anafig.1; on fig.Z - scan fignoh grooves rod.

The downhole sucker-rod pump contains a cylinder 2 installed in the housing 1 with a suction valve assembly 3 and a hollow plunger 4 with a pressure valve 5 placed in cylinder 2, the suction valve assembly 3 having a valve cage 6., a cone seat 7 and a locking element 8, a suction valve assembly 3 is additionally provided with a spring-loaded stem 9 with an upper 10 and lower 11 rows of figured grooves 12 connected to the seat of a cone 7 and plugged from below by means of a cover 13 with a rotatable sleeve 14 20 with transverse pins 15 alternately interacting with shaped grooves 12 stock, i.e. with the top 10 and bottom 11 I: x r dami. The rotary bushing 14. and the housing 1 are provided with radial channels 16 that are capable of separating. The rod 9 is spring loaded with a spring 17 and is made: axially rotated around an axis, for example, it has a square cross section (.). The housing 1 and the rotary sleeve 14 are provided with bypass channels 18 and 19 respectively connecting the cavities of the rotary sleeve 14 and the cylinder 2. The pump housing 1 is connected by means of the sub 20 to the column of pump tubes 21, and the plunger 4 is connected to the column rod 22.

The proposed borehole pump works as follows.

12083072

the suction valve 3 is opened, the process of suction of the liquid and the filling of the cavity of the cylinder 2 of the pump with liquid occur. When fluid is sucked into the cavity of the cylinder 2, the bypass channels 18 of the pump housing 1 communicate with the bypass channels 19 of the rotary sleeve 14. In this case, the cavities of the cylinder 2 and the rotary sleeve 14 are connected, and the liquid additionally enters the pump cylinder, increasing its capacity.

In case of repair of ground, underground equipment or 15 in the event of emergency situations, the pump tube string 2 automatically overlaps with the weight of the stem string 22 at the suction valve assembly 3. To replace the valve 5 of the plunger 4 after stopping the pump, close the wellhead seal valve (not shown) and the gas is vented into the discharge pipeline (not shown), then proceed to the preparatory operations for the rods 22. They create a load on the suction valve assembly 3, as a result of which the sleeve 14 rotates 90, ceiling 16 and radial bypass channels 18, thereby sealing occurs, pump column pipes space 21. No work on killing the well is not required.

35

40

45

In case of emergencies, for example, when a polished rod breaks (not shown, the plunger 4 under the action of the weight of the rod string 22 is lowered, presses the valve cage of the 6-node of the suction valve 3, compresses the spring 17, and the rod 9 goes down, interacting in upper row 10 figured grooves 12 with transverse pins 15 of the rotary sleeve 14. The latter rotates 90 ° and closes the radial 16 and bypass channels 19, sealing it to the very space of the column of pump tubes 21 and preventing the outflow of the well production. The rod has been eliminated, and the load from the weight of the rod string on the valve cell 6 of the suction assembly, valve 3 has disappeared, the SS panel pan 6, the suction valve assembly 3 and the stem 9 have returned to their original position, at the same time the bottom r d 11

50

 When the plunger 4 is lowered, the screwed-up element 8 of the node of the suction valve 3 is closed and the liquid through the discharge valve 5 enters the column of pump tubes 21. The injection process takes place. When the plunger 4 is raised, the 1st valve 5 is forced to close, and the valve element 8

In case of emergencies, for example, when a polished rod breaks (not shown, the plunger 4 under the action of the weight of the rod string 22 is lowered, presses the valve cage of the 6-node of the suction valve 3, compresses the spring 17, and the rod 9 goes down, interacting in upper row 10 figured grooves 12 with transverse pins 15 of the rotary sleeve 14. The latter rotates 90 ° and closes the radial 16 and bypass channels 19, sealing it to the very space of the column of pump tubes 21 and preventing the outflow of the well production. The rod has been eliminated and the load from the weight of the rod string on the valve cell 6 of the suction assembly, valve 3 has disappeared, the valve cage 6, the suction valve assembly 3 and the stem 9 under the action of the spring 17 returns to its original position, this bottom row d 11

3 ,

shaped grooves interacts with transverse pins 15 rotary bushings 14, but radial 16 and bypass 19 channels are separated. To communicate them, it is necessary to re-create a load on the valve cage 6 of the suction 3 valve assembly, which will cause the sleeve 14 to rotate by another 90 °, and thereby radial 16 and by-pass

208307

 19 channels will open. After the repair work is completed, it is necessary to quickly load the valve cage 6 with the weight of the rods 22 and relieve the load, then adjust the stroke of the polished rod to raise the column of rods above the valve cage 6 by 500-600 mm) and put the pump into operation.

FIG. g

FIG. 3

iO

Claims (2)

1. A downhole sucker rod pump comprising a cylinder installed in the housing with a suction valve assembly and a hollow plunger with a discharge valve located in the cylinder, the suction valve assembly having a valve cage, a cone seat and a shut-off element, characterized in that, in order to reduce operating costs p when performing repair work by eliminating well killing, the suction valve assembly is additionally equipped with a spring-loaded stem with upper and lower rows of curly grooves associated with the cone seat and plugs constant bottom rotary sleeve with transverse pins alternately interacting with shaped grooves rod, wherein the rotary sleeve and housing are provided adapted to radial separation channels, and the rod is made fixed against rotation about the axis. 2. The pump according to claim 1, characterized in that, in order to increase the productivity Sg, the housing and the rotary sleeve are provided with bypass channels connecting the cavities of the rotary sleeve and the cylinder.