SU1357550A1 - Apparatus for deep-pumping operation of wells - Google Patents

Abstract

The invention relates to the oil and gas industry. The purpose of the invention is to improve the reliability of operation of the device in wells, which are under the influence of in-situ combustion, due to the prevention, explosion and cooling of the wellbore zone. The device contains a discharge line 1, a production column 2, inside of which there is gas measles associated with a column of lifting pipes 3. Last about: Cr SL 01

Description

includes a housing (K) 4 with radial holes 5, under which cuffs 6 are placed. Inside K 4, pipe 7 is rigidly fixed with radial holes 5 for communicating pipes 3 with the annulus 9. Telescopically mounted in K 4 with the possibility of axial displacement a sleeve (B) 10 with radial holes 11. A disk-shaped shutter 12 is pivotally connected to the lower part of the nozzle 7. Under the B 10 there is a spring 14 having a “shape memory, the upper end of which is hinged with B 10 and the breech 12, and lower - connect1

The invention is intended for the use of well pumping oil wells that are affected by the in situ combustion process, in which the bulk of the gas is contained.

The aim of the invention is to improve the reliability of operation of the device in wells under the influence of intra-layer combustion by preventing explosion and cooling the bottom-hole zone.

The drawing shows a device for downhole pumping a well with a general view.

The device consists of a discharge line 1, a production column 2, inside of which gas measles, connected with a column of lifting pipes 3, is located, comprising a body 4 with radial holes 5, under which cuffs 6 are placed. A branch pipe 7 with radial holes is rigidly fixed inside the body 4 8 for communicating the string of lifting pipes 3 with the borehole space 9. In the housing 4 a sleeve 10 with radial holes 11 is axially displaced to move axially. Ure 12, connected to the nozzle by a hinge 13. Under the sleeve 10 in the lower part of the body 4, a spring 14 is exchanged, having the “shape memory” property, the upper end of which is connected to the sleeve 10 and the disk closure 12, respectively, I} 15 and 16. The lower end of the spring 14 is connected to the housing.

On flow line 1, there is a unit for supplying water to the annulus of the well, made in the form of a membrane 17 connected to a spring-loaded ShGOK 18 and a crane 19 with a locking element, the rod being connected to the locking element of the crane 19 by a hinge 20.

It is equipped with a K 4. On line 1 there is a unit for supplying water to the annulus, made in the form of a membrane 17 connected to a spring-loaded stem 18, and a valve 19 with a locking element. Under the action of the overpressure created on line 1, the membrane 17 and the shaker 18 act on the locking element, keeping it in the closed state. When t-rats are raised on the bottom, the rod 18 moves and opens the valve 19, and water 9 enters the space 9, cools the underground equipment and the bottom zone. 1 hp f-ly, 1 ill.

The device works in the following way. When the bottom hole temperature does not exceed the critical one (150 ° C), the spring 14 is in the expanded state, the holes in the housing 4 coincide with the holes of the sleeve 10, and the disk valve. 12 is closed.

The well fluid enters the body 4 and, moving in the direction indicated by the arrow, makes a full revolution in 360 °

0 and enters the riser pipe 3. The gas released at the same time enters the discharge pipe 9 of the well into the discharge line 1. The overpressure in the discharge line acts through the membrane 17 and the spring-loaded rod 18

5 pa shutoff element of the crane 19, maintaining it in the closed state. Water in the annular space does not flow.

When the temperature at the bottom of the well is higher than the critical one, the spring 14, which has the “shape memory” property, shrinks, and its upper end will open the disc valve 12 and simultaneously move the sleeve 10 to the lower position, which will block the hole of the housing.

Sun The wellbore fluid (with dissolved gas) immediately enters the riser without separating the gas. In the annulus 9 and discharge line 1 there will be a drop in gas pressure and a force

0, acting on the membrane of the water supply unit will decrease, as a result of which the spring-loaded rod 18 will move to the opposed position and will open the stop element of the valve 19. Water will begin to flow into the annulus, cooling the ground equipment and the bottom zone. After the temperature drops below the critical spring 14, it will re-liquefy to

0

the original position, with the disc closure 12 being closed, and the sleeve 10 will take the upper position, opening the holes in the housing 4.

Claims (2)

1. An apparatus for downhole pumping a well, comprising a discharge line, an production string, inside of which is a gas measles associated with a string of lifting pipes, comprising a housing with radial holes, under which are placed cuffs, a rigidly fixed inside of the body a branch pipe with radial holes for communication of the tubing string with the annulus of the well, characterized in that, in order to increase the reliability of its operation in the wells affected by the in-situ formation It is equipped with a sleeve with radial holes, articulated with the bottom of the branch pipe, a disk-shaped shutter, a spring under the sleeve, which has an “almost shaped” shape. , the upper end of which is connected to the sleeve and the plate valve, and the lower end is connected to the housing, and a unit on the flow line for supplying water to the annulus of the well. 2. An apparatus according to claim 1, characterized in that the unit for supplying water to the annulus of wells is made in the form of a membrane connected with a spring-loaded stem, and a valve with a locking element, the rod being hinged to the locking element of the crane.