RU2169291C1 - Sucked-rod pump drain device - Google Patents

Abstract

FIELD: oil industry; oil-well operation. SUBSTANCE: proposed device has housing with through channel and drain arrangement. The latter is made in form of piston fitted in bore which couples through channel with drain hole. Bore is made in radial section of housing. Through hole with fitted-in plug is made in housing diametrically opposite to bore. Plug is connected with piston by breakable member. EFFECT: facilitated repair of pump. 1 dwg

Description

 The invention relates to borehole sucker rod pumps for the operation of oil wells.

 A well-known sucker-rod pump containing a filter element located above the plunger in the form of a figured sleeve fixed in the coupling of the lifting pipes and the opening of which is closed by a cap sealed by the diameter of the rod, as well as a drain device communicating the bypass channel with the annulus, the drain device is made in the form a spool installed in a glass-shaped sleeve eccentrically positioned relative to the lifting pipe clutch having a channel for communication with the input and output of the bypass channel and the annular a space of, and the cover is formed as a ring covering the cargo bar (see. SU 830006 A, 15.05.1981).

 The disadvantage of the drain device used in the pump is the low reliability of the repair work when draining the liquid.

 Also known from the technical literature is a pump in which a drain device comprises a housing with a passage channel and a drain device made in the form of a piston mounted in a bore that connects the passage channel with a drain hole (see the Catalog of Izhneftemash, 1995).

 A disadvantage of the known device is its low reliability when lifting a pipe string with liquid from a well.

 The objective of the invention is to create a device that eliminates these disadvantages and provides reliable drainage of fluid from the tubing during repair work.

 The technical result is achieved by the fact that in a drain device of a sucker rod pump comprising a housing with a passage channel and a drain device made in the form of a piston mounted in a bore connecting the passage channel with a drain hole, said boring is made in a radial section of the housing, diametrically opposite to it in the housing a through hole is made in which the plug is installed, while the plug is connected to the piston by a destructible element.

 The invention is illustrated in the drawing, which shows a drain device of a sucker rod pump.

 The drain device includes a housing 1 connected to the pump cylinder with a passage 2, a intake valve 3, a seat 4 and a drain device made in the form of a piston 5 mounted in a bore 6. A bore 6 connects the bore 2 with a drain hole 7. The bore 6 is made a radial section of the housing 1. A through hole 8 is made diametrically opposite to the bore 6 in the housing 1. A plug 9 is installed in the through hole 8. The plug 9 is connected to the piston by a destructible element 10. A nut 11 is installed in the bore 6 with an opening 12 through ond carried out the installation of the piston 5.

 The drain device operates as follows.

 In the event of a failure of the sucker rod pump, the tubing pipes together with the sucker rod pump go up for repair. The fluid in the pipes must drain into the well. However, valve 3 prevents this. To drain the liquid from the pipes, the pumping unit from above delivers the liquid under a pressure that is 1.5 ... 2 times greater than the working pressure of the sucker rod pump. This pressure acts on the piston 5. Moving the piston 5 will destroy the element 10 and the passage passage 2 will communicate with the drain hole 7. However, when high pressure is applied to the pipe string, one of the tubing may be destroyed and “fly” due to corrosion wear or for other reasons. In this case, the discharge of liquid, i.e. the communication channel 2 with the drain hole 7, is carried out by mechanical destruction of the element 10, for which a weighted object is dropped from the surface, for example a metal rod. This method of discharge is used if there is no pump unit to create high pressure. The double operating principle of the drain device, hydraulic and mechanical, provides convenience and reliability.

 The invention improves reliability and also simplifies pump repair.

Claims (1)

 A suction pump drain device comprising a housing with a passage channel and a drain device made in the form of a piston mounted in a bore connecting the passage channel with a drain hole, characterized in that said boring is made in a radial section of the housing, a through hole is diametrically opposite to it in the housing in which the plug is installed, the plug being connected to the piston by a destructible element.