CN2780986Y

CN2780986Y - Metal silk screen sand-proof screen tube

Info

Publication number: CN2780986Y
Application number: CN 200520089708
Authority: CN
Inventors: 于春林
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-15
Filing date: 2005-03-15
Publication date: 2006-05-17
Anticipated expiration: 2015-03-15

Abstract

The utility model relates to a metal wire net sand-proof screen tube used for early micropore sand prevention and filtration of oil wells, gas wells and deep wells in the oil exploitation operation. The utility model comprises a base tube, and both ends of the base tube are provided with external threads. The base tube is evenly distributed with through holes which containing limiting circular tables in, the filtering material formed by the extrusion of the metal wires or short wires is filled in the through holes. The utility model has the technical essential that a screen net-shaped filtering limiting layer and barrier chip positioning layer with an oil passing hole are respectively arranged outside the filtering material, wherein the barrier chip positioning layer is welded on the intersecting edge position of the trough holes and the external wall. The utility model is respectively provided with the screen net-shaped filtering limiting layer and the barrier chip positioning layer with an oil passing hole outside the filtering material formed by the extrusion of the metal wires. Therefore, the filtering material formed by the metal wires has high intensity, besides, a screen net layer also plays the auxiliary filtering action. The utility model has the advantages of reasonable structure, favorable filtering effect, long service life, difficult blockage, wide application range, etc.

Description

The wire gauze sand control screen

Technical field

The utility model belongs to a kind of filter plant technical field, and is specifically a kind of in the oil exploitation operation, is used for oil well, gas well and the deep well wire gauze sand control screen that early stage, the micropore sand control filtered.

Background technology

As everyone knows, the oil-sand isolated by filtration be in the petroleum industry oil producing operation the technical problem that must solve.The applicant successively applied for two utility model patents the nineties, and its patent No. is not for being: ZL92237122.9, ZL93227904.X.Wherein the latter's utility model patent is protected to the effect that: have at two ends on the peripheral tube wall of externally threaded stainless steel tube and be evenly equipped with through hole, be filled with wire or the short silk filtering material through extrusion modling in through hole.At present, the wire sand control screen of said structure also is being widely used as sand control filter wherein, but this structure is in the sand control treatment process of down-hole, in case run into more serious collision, filtering material is yielding to come off, and sand controlling result is filtered in influence, and application life is shorter.

Summary of the invention

The purpose of this utility model provides a kind of composite construction that utilizes and prevents the wire gauze sand control screen that wire comes off.

The purpose of this utility model is achieved in that it includes a parent tube, two ends at parent tube have external screw thread, on parent tube, be evenly distributed with the through hole that includes spacing round platform, in through hole, be filled with wire or short silk filtering material through extrusion modling, it is characterized in that: also be respectively equipped with the catch alignment layers that mesh-like is filtered spacing layer and band oil through in the outside of filtering material, wherein the catch alignment layers is welded on through hole and outer wall intersecting edge place.

At present, normally used parent tube length is at 2～4 meters in the down-hole, and therefore, for the ease of installing, the taper ratio of generally setting the external screw thread place is 1: 16.

According to the concrete operations environment of down-hole, technological requirement and oil pumping amount then are processed into circle with filtration beds through hole or oil through, and ellipse is or/and bar shaped.

The utility model filters spacing layer and the catch alignment layers of being with oil through owing to be respectively equipped with mesh-like in the outside of extrusion modling wire filtering material, therefore has wire filtering material intensity height, and screen layer also plays the attached effect that helps filtration, the catch alignment layers is welded on the parent tube by the mode of welding securely, make crude oil earlier by the oil through on the catch alignment layers, filter and enter in the parent tube through screen layer and wire again, thereby oil-sand is separated.This structure also can be according to the size of sand production in oil amount, and its filtered version is modulated into the screen casing of slot formula filter sand function.The utlity model has rational in infrastructure, good filtration effect, filtering material uses difficult drop-off in the down-hole, use the longevity long, be difficult for stopping up characteristics such as range of application is wide.

Description of drawings

Fig. 1 is that the structural representation sketch cuts open in office of the present utility model

Fig. 2 is that A-A among Fig. 1 is to amplification profile

To be described in further detail utility model by example below; but following example only is the utility model example wherein; the rights protection scope of not representing the utility model and being limited, rights protection scope of the present utility model is as the criterion with claims.

The specific embodiment

Example 1

By shown in Figure 1, among the figure 1 is parent tube, having tapering at the two ends of parent tube 1 is than 1: 16 external screw thread 2, on parent tube, be evenly distributed with the through hole 3 that includes spacing round platform, in through hole, from inside to outside be filled with the filtering material 4 of wire compression moulding successively, mesh-like is filtered the catch alignment layers 6 of spacing layer 5 and band oil through, and wherein the catch alignment layers mode that adopts full weld to connect is welded on through hole and outer wall intersecting edge place securely with catch, and 7 among Fig. 2 is pad.The installation of this structure, using method and effect are identical with the screen casing of existing same domain.

Claims

1, a kind of in the oil exploitation operation, be used for oil well, gas well and the deep well wire gauze sand control screen that early stage, the micropore sand control filtered, it includes a parent tube, two ends at parent tube have external screw thread, on parent tube, be evenly distributed with the through hole that includes spacing round platform, in through hole, be filled with wire or short silk filtering material through extrusion modling, it is characterized in that: also be respectively equipped with the catch alignment layers that mesh-like is filtered spacing layer and band oil through in the outside of filtering material, wherein the catch alignment layers is welded on through hole and outer wall intersecting edge place.

2, wire gauze sand control screen according to claim 1 is characterized in that: the taper ratio at external screw thread place is 1: 16.

3, wire gauze sand control screen according to claim 1 is characterized in that: filtration beds through hole or oil through are for circular, and ellipse is or/and bar shaped.