CN2534368Y

CN2534368Y - Sand control screen tube

Info

Publication number: CN2534368Y
Application number: CN 01230100
Authority: CN
Inventors: 苏振亚; 程建忠; 陈祥久; 叶俊; 张学昌; 李建清
Original assignee: Sinopec Zhongyuan Oilfield Co No 6 Oil Production Plant
Current assignee: Sinopec Zhongyuan Oilfield Co No 6 Oil Production Plant
Priority date: 2001-08-22
Filing date: 2001-08-22
Publication date: 2003-02-05
Anticipated expiration: 2011-08-22

Abstract

The utility model discloses a novel sand control screen tube. An inner lining pipe with small holes uniformly distributed is fixed in a cavity of a screen tube by a copper rivet. A copper sand net is provided between the inner lining pipe and the screen tube. The mesh number of the sand net can be selected according to oil quality and condition of formation sand production. The sand net adopts an internal fixation, which can prevent borehole coagulation and big particle substance from going into a valve cavity and prolong a pump detection period.

Description

A kind of new anti-sand sieve tube

The utility model relates to a kind of sand control screen, belongs to the ancillary service of mechanical oil recovery.

At present in pumpingh well pump detection and workover monitor procedure, finding has fouls such as screw thread film, band, suspension, sand in the standing valve, travelling valve chamber of many deep well pumps, its main cause is that common screen casing does not have filtration to cause, once adopted external stability screen pack in the past at common screen casing, but influenced by oil pipe wriggling, filter screen and fixed structure easily fall in the well and cause the accident.

The purpose of this utility model is exactly the shortcoming that overcomes prior art, and a kind of new anti-sand sieve tube is provided.

The purpose of this utility model is achieved in that in the chamber of screen casing and is fixed with internal lining pipe by copper rivet, is evenly equipped with aperture on the internal lining pipe, is provided with copper mesh between internal lining pipe and the screen casing.

The utlity model has following advantage:, stopped the down-hole accident that causes because of the oil pipe wriggling 1, because of the sand net adopts inner-fixing; 2, rivet and sand net select for use copper because the effect of cathodic protection has guaranteed the application life of screen casing; 3, the sand net can play and prevent that interior condensate of well and large particulate matter from entering in the valve chamber, has played the effect that prevents valve card and quick abrasion, has prolonged the pump detection period of pumpingh well; 4, interchangeable adjustable, flushable, the no life cycle of sand net can be used always; 5, sand mesh number can be selected voluntarily according to oil, formation sand production situation needs.

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1: sand control screen structural representation;

Among the figure: 1-screen casing, the copper rivet of 2-, the copper sand net of 3-, 4-internal lining pipe;

As shown in Figure 1, new anti-sand sieve tube is to be fixed with internal lining pipe 4 by copper rivet 2 in the chamber of screen casing 1, is evenly equipped with aperture on the internal lining pipe 4, is provided with copper sand net 3 between internal lining pipe 4 and the screen casing 1.The order number of sand net 3 can be selected voluntarily according to oil, formation sand production situation needs, because the sand net adopts inner-fixing, thereby can prevent effectively that interior condensate of well and large particulate matter from entering in the valve chamber, prolonged pump detection period.

Claims

1, a kind of new anti-sand sieve tube is characterized in that: be fixed with internal lining pipe (4) by copper rivet (2) in the chamber of screen casing (1), internal lining pipe is evenly equipped with aperture on (4), is provided with copper mesh (3) between internal lining pipe (4) and the screen casing (1).