CN2551764Y

CN2551764Y - Filtering complement screen pipe

Info

Publication number: CN2551764Y
Application number: CN 02227717
Authority: CN
Inventors: 石云夫
Original assignee: MAOMING TONGREN INDUSTRIAL Co Ltd
Current assignee: MAOMING TONGREN INDUSTRIAL Co Ltd
Priority date: 2002-05-20
Filing date: 2002-05-20
Publication date: 2003-05-21
Anticipated expiration: 2012-05-20

Abstract

The utility model relates to a completely filtering screen pipe, which comprises a base pipe (5), joints (1) and (8), and a filter layer (4), the outer round surface of the base pipe (5) is provided with support rings (2) by the subsection way; an outer pipe (3), the filter layer (4), and the support rings (2) are arranged correspondingly by the subsection way, and are welded and fixed by the support rings (2); through holes are arranged on the base pipe (5) and the outer pipe (3). The design of the structure is reasonable, the filtering area of the screen pipe is increased, the sand-filtered effect is increased, the precision is high, the integral strength is high, the suitability for the environment is better, the connection and the assembly are convenient, the working efficiency is high, and the operation cost is reduced.

Description

Filter complete screen casing

The utility model relates to a kind of filter pipe, particularly a kind of complete screen casing that is applied to oil field, the filtration of gas field development field sand control.

In the exploitation of petroleum industry, recovery process, sand control is an important problem, and the effect of sand control work directly influences oil, gas extraction.The anti-sand method of oil field, gas field employing is mechanical sand control the most widely at present, sand and fluid are opened by isolated by filtration, because the difference of geological condition, sanding mechanism, operating environment, requirement to sand-preventing process is also different, the facility of mechanical sand control, equipment are also different, and the sand control screen that mechanical sand control adopted just produces numerous types like this, for different use occasions, select suitable sand control screen could obtain desirable sand controlling result, carry out otherwise can influence exploitation work.Design is reasonable inadequately on the existing screen construction, exist significantly and filter blind section, influence sieves efficient, on the pipe the trapezoidal wiper block of welding set upright weak effect, bulk strength is lower, application life is shorter, and the specification of screen casing uses standard A PI different with petroleum industry, and the attended operation difficulty is installed, and work efficiency is low, prolong the activity duration, increased cost of production.

The purpose of this utility model is to provide a kind of improved filtration complete screen casing for the shortcoming that overcomes above-mentioned prior art, increases the screen casing filter area, improves filter effect and bulk strength, increases the service life, and reduces production costs.

The purpose of this utility model realizes by following technical measures: the parent tube two ends of this screen casing are joint, one end is male connection, the other end is female adapter, segmentation is provided with support ring on the face of garden outside parent tube, outer tube and parent tube upper support ring corresponding segments are provided with, be sleeved on outside the parent tube, every section outer tube is all fixed by support ring, between parent tube and outer tube, be provided with filtration beds, filtration beds and outer tube, the support ring corresponding segments is provided with, and is all fixed by support ring for every section, all offer many through holes on parent tube and the outer tube, except that nipple, through hole is covered with at the whole piece tube wall, and flowing material can pass through parent tube, the through hole of outer tube and filtration beds.In actual applications, outer tube adopts API standard oil tubing, and outer tube and filtration beds segmentation are weldingly fixed on the support ring, and parent tube, support ring, outer tube, filtration beds are combined as a whole, and connect use by nipple between the screen casing fully.

Concrete structure of the present utility model and embodiment are provided by the following drawings:

Fig. 1 is the structure chart that filters complete screen casing.

The utility model is described in further detail below with reference to accompanying drawing: with reference to Fig. 1, parent tube [5] is all-in-one-piece steel pipe, one end is female adapter [1], the other end is male connection [8], be drilled with the passage of the suitable through hole [6] of size and quantity on the parent tube as fluid, evenly be covered with through hole [6] on the tube wall outside the nipple, segmentation is welded with support ring [2] on the face of the outer garden of parent tube [5], outer tube [3] is provided with parent tube [5] upper support ring corresponding segments, outer tube [3] segmented sheathing is at parent tube [5] skin, fixing by support ring [2] welding, between outer tube [3] and parent tube [5], leave the gap, be provided with filtration beds [4] in the gap, filtration beds [4] adopts the metallic fiber filtering material to make, offer many through holes [7] on the outer tube [3], through hole [7] evenly is covered with on whole section tube wall, flowing material can pass through parent tube, the through hole of outer tube [6], [7] and filtration beds [4], filtration beds [4] and support ring [2], outer tube [3] corresponding segments setting, there is support ring [2] one or both ends of each section, and filtration beds [4] is fixing by the support ring welding.In application, outer tube adopts API standard oil tubing, assurance and oil pipe, sleeve pipe use the material uniformity, connect use by nipple between the screen casing fully, parent tube [5] and support ring [2], outer tube [3], filtration beds [4] are welded into as a whole, according to using needs, load onto centralizer in complete screen joint, it connects generation whole structure.

The technical solution of the utility model is reasonable in design, and is simple in structure, effectively increased the filter area of screen casing, improve filter effect, reduce the down-hole pressure loss, prolong screen casing application life, its sand controlling result is good, sand control precision height, the bulk strength height, non-deformability is strong, can adapt to all kinds of inclement condition wells, easy for installation, shorten the activity duration, reduce production costs.

Claims

1, the complete screen casing of a kind of filtration, parent tube [5], joint [1], [8], outer tube [3], filtration beds [4] are arranged, it is characterized in that outside parent tube [5] segmentation is provided with support ring [2] on the face of garden, outer tube [3] and parent tube [5] upper support ring [2] corresponding segments setting, be sleeved on outside the parent tube [3], fixing by support ring [2], all offer through hole [6], [7] on parent tube [5] and the outer tube [3], between parent tube [5] and outer tube [3], be provided with filtration beds [4], filtration beds [4] and outer tube [3], support ring [2] corresponding segments setting.

2, screen casing according to claim 1 is characterized in that support ring [2] is weldingly fixed on the face of the outer garden of parent tube [5].

3, screen casing according to claim 1 is characterized in that outer tube [3] all is weldingly fixed on outside the parent tube by support ring [2] for every section.