CN2516690Y

CN2516690Y - Oil-well pump bottom sand-proof device

Info

Publication number: CN2516690Y
Application number: CN 01251209
Authority: CN
Inventors: 李颖; 秦昌春; 秦明哲
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-29
Filing date: 2001-10-29
Publication date: 2002-10-16
Anticipated expiration: 2011-10-29

Abstract

The utility model provides a sand-proof device for the bottom of oil pumps, which is characterized in that an outer pipe is arranged at the upper part of the body of the sand-proof device; an inner cavity is connected with an inner pipe; the outer pipe is sleeved on the outer side of the inner pipe; the interlayer forms a sand settling cavity; a backflushing inverted valve is arranged at the bottom of the sand settling cavity so as to eliminate settling sand slags through back well flushing; a check ball valve and an arc valve cover are arranged at the top end of the inner pipe; a drainage sand-discharge channel is opened on the side surface of the valve cover; the valve seat of the check ball valve is designed to be boss shaped; impurities such as slags are enabled to pass the sand-discharge channel and to slide into the sand settling cavity. The utility model has the advantages that the check ball valve and the arc valve cover are arranged on the inner pipe so as to prevent settling sands and slags from falling into well pipes; occurrence of oil pump pull, pump sand sticking and well sand sticking is avoided; and normal operation of oil pumps is ensured.

Description

Oil well pump bottom sand control installation

Technical field:

The utility model provides a kind of oil well pump bottom sand control installation, belongs to oil recovery machiner equipment

Technical field.

Background technology:

Oil pump often has impurity such as sand, the dregs of fat to sink in the well casing in oil recovery process, usually causes phenomenons such as oil pump is pulled, holddown, Ka Jing to take place, and damages pumping unit, has seriously influenced oil extraction operation and has normally carried out.

Summary of the invention:

The purpose of this utility model is to provide a kind of oil well pump bottom sand control installation, has solved impurity such as sand, the dregs of fat and has fallen into the problem that the down-hole causes oil recovery machiner to damage.

Technical solution of the present utility model is as follows: be provided with outer tube in the sand control installation upper part of body, inner chamber is connected with interior pipe, the outside of pipe in outer tube sleeve is contained in, between interlayer constitute the sand setting chamber, the bottom in sand setting chamber is provided with the recoil ball-and-seat, can carry out anti-well flushing and remove the sand setting slag, at the top of interior pipe device non-return valve and arc valve bonnet are arranged, the side of valve bonnet has drain sediment outflow passage, and the seat design of non-return valve is the boss shape, and impurity such as sediment are slided in the sand setting chamber by the sediment outflow passage.

During use this device is installed in the bottom of oil well pump; in the plunger and oil recovery process of following pump; sand setting and sediment fall; behind protective cover, fall the arc valve bonnet and glide and drop in the sand setting chamber; when sand setting, when sediment reaches some; can sand, wash heat be gone out the sand setting chamber by anti-flushing well and enter production flow line and remove, guarantee the normal operation of oil well pump.

Good effect of the present utility model is: device has non-return valve and arc valve bonnet to prevent that the sand setting sediment from falling into well casing on the interior pipe, has avoided phenomenons such as oil pump is pulled, holddown, Ka Jing to take place, and has guaranteed the operate as normal of oil well pump.

Description of drawings:

Fig. 1 is the utility model structure principle chart.

1～protective sleeve, 2～valve bonnet, 3～outer tube, 4～interior pipe, 5～joint, 6～sand setting chamber, 7～back-moving spring, 8～recoil ball-and-seat, 9～ball valve, 10～valve seat, 11～device body.

The specific embodiment:

With reference to Fig. 1; at sand control installation body 11 is cavity structure; its top is joint 5 and is provided with outer tube 3; inner chamber is connected with interior pipe 4; the outside of pipe 4 in outer tube 3 is sleeved on; between interlayer constitute sand setting chamber 6; the bottom in sand setting chamber 6 is provided with recoil ball-and-seat 8; netted protective cover 1 is enclosed within on the outer tube 3, prevents oil pump plunger piston collision non-return valve 9, and the top device of interior pipe 4 has non-return valve 9, valve seat 10 and valve bonnet 2; the one-way flow of control crude oil; the side of valve bonnet 2 has drain sediment outflow passage, and valve seat 10 is a boss structure, and the sand setting slag that guiding is fallen is slipped in the sand setting chamber 6.

Claims

1, sand control installation bottom a kind of oil well pump, be provided with outer tube (3) on the top of device body (11), inner chamber is connected with interior pipe (4), outer tube (3) is sleeved on the outside of interior pipe (4), between interlayer constitute sand setting chamber (6), the bottom in sand setting chamber (6) is provided with recoil ball-and-seat (8), and it is characterized in that: the top device of interior pipe (4) has non-return valve (9), valve seat (10) and arc valve bonnet (2).