CN212130464U

CN212130464U - Primary pipe column subsection sand prevention tool

Info

Publication number: CN212130464U
Application number: CN201922409935.6U
Authority: CN
Inventors: 杨伟; 张祖峰; 陈琳; 吉元强; 李刚; 刘莎莎; 邵彦峰; 郑茂桢; 周建国; 邢金虎
Original assignee: ZHONGSHENG OIL AND GAS NEW TEC
Current assignee: ZHONGSHENG OIL AND GAS NEW TEC
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-12-11
Anticipated expiration: 2029-12-28

Abstract

The utility model discloses a tubular column segmentation sand control instrument once, including main casing pipe and sand screen, the sand screen includes interior sand screen and cup joints in proper order including the filter tube in the sand screen outside and outer sand screen, the utility model discloses a one-level sand screen carries out primary filtration to impurity wherein containing, and the oil field in the outside produces certain extrusion force to the sand screen, through being provided with the anchor strut, improves the anti extrusion intensity of outer sand screen, prolongs its live time, and the filter layer of second grade sand screen both sides can reduce the possibility that quartz sand gets into one-level fine filtration hole and second grade fine filtration hole, avoids its condition that produces the jam, filters through the quartz sand of one-level sand screen and second grade sand screen granularity difference, and is with low costs, does benefit to people and uses, and the sand screen divide into the multilayer and filters, and the filter effect is showing, and simple structure.

Description

Primary pipe column subsection sand prevention tool

Technical Field

The utility model relates to an oil field exploitation technical field specifically is a tubular column segmentation sand control instrument once.

Background

In the abundant petroleum resources in China, loose sandstone oil resources are distributed most widely and reserve the largest, but the difficulty that the yield is influenced by sand entering of an oil well is often encountered in exploitation, particularly in old oil wells, the water injection amount into the oil well is gradually increased along with the extension of exploitation time, so that the sand production amount of the oil well is increased, the oil recovery amount is seriously influenced, and the service life of equipment is shortened. In order to filter sand from the oil and increase the oil production, a sand screen is connected to the oil extraction pipe extending into the oil reservoir to reduce the amount of sand mixed into the oil.

The existing once multi-section sand control well completion pipe column comprises a drilling plug-free grading hoop, a filling sliding sleeve assembly, a sand filter pipe, a thermal compensator, an open hole packer and a well washing valve which are sequentially connected onto a sleeve, the sand filter pipe passing through at present filters the sand filter pipe, the manufacturing cost of the sand filter pipe is high, and when the sand filter pipe is used for filtering, the condition of blockage is easily generated, and the filtering to an oil field is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tubular column segmentation sand control instrument once to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a primary pipe column subsection sand prevention tool comprises a main casing pipe and a sand filtering pipe, wherein a grading hoop, a filling sliding sleeve assembly, the sand filtering pipe, a compensator, an open hole packer and a well washing valve are sequentially connected onto the main casing pipe, the sand filtering pipe comprises an inner sand filtering pipe, and a filtering pipe and an outer sand filtering pipe which are sequentially sleeved outside the inner sand filtering pipe, a plurality of coarse filtering holes are uniformly arranged on the outer wall of the outer sand filtering pipe, the outer sand filtering pipe is connected with the filtering pipe through a plurality of reinforcing rods, a primary sand filtering body is filled between the filtering pipe and the outer sand filtering pipe, a plurality of primary fine filtering holes are arranged on the inner wall of the filtering pipe, the primary fine filtering holes are positioned between the adjacent reinforcing rods, the sand filter is characterized in that a second-stage sand filtering body is arranged between the inner sand filtering pipe and the filtering pipe, a plurality of second-stage fine filtering holes are formed in the inner wall of the inner sand filtering pipe, the first-stage fine filtering holes and the second-stage fine filtering holes are in a round platform shape, and one end of each first-stage fine filtering hole, which is small in diameter, is located on the outer side.

Preferably, the reinforcing rod is in a quadrangular frustum pyramid shape, and one end of the reinforcing rod with a large length is fixedly connected with the outer sand filtering pipe.

Preferably, a filter layer is arranged between the filter pipe and the outer sand filtering pipe, filter layers are arranged between the secondary sand filtering body and the filter pipe and between the secondary sand filtering body and the inner sand filtering pipe, and the pore sizes of the filter layers at the three positions are different.

Preferably, the diameter of the outer side of the first-stage fine filtering hole is larger than that of the outer side of the second-stage fine filtering hole, the first-stage fine filtering hole is positioned between the adjacent second-stage fine filtering holes, and the aperture of the coarse filtering hole is larger than that of the outer side of the first-stage fine filtering hole.

Preferably, the first-stage sand filtering body and the second-stage sand filtering body both adopt quartz sand filtering bodies, and the granularity of the quartz sand of the first-stage sand filtering body is larger than that of the quartz sand of the second-stage sand filtering body.

Compared with the prior art, the beneficial effects of the utility model are that: carry out the primary filter to wherein containing impurity through the one-level sand filtering body, the oil field in the outside produces certain extrusion force to the sand screen, through being provided with the anchor strut, improve the anti extrusion strength of outer sand screen, prolong its live time, the filter layer of second grade sand filtering body both sides can reduce the possibility that quartz sand gets into the fine filtration hole of one-level and the fine filtration hole of second grade, avoid its condition that produces the jam, filter through the quartz sand of one-level sand filtering body and the different quartz sand of second grade sand filtering body granularity size, it is with low costs, do benefit to people and use, the sand screen divide into the multilayer and filters, the filter effect is showing, and simple structure.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a schematic structural view of the sand screen of the present invention;

fig. 3 is a top sectional view of the structure of the sand screen of the present invention.

In the figure: 1. a main bushing; 2. a grading hoop; 3. a sand screen pipe; 31. an inner sand filtering pipe; 32. an outer sand screen; 33. a filter tube; 34. a reinforcing rod; 35. a primary sand filtering body; 36. a filter layer; 37. primary fine filtering holes; 38. secondary sand filtering body; 39. secondary fine filtration pores; 310. coarse filtering holes; 4. filling the sliding sleeve assembly; 5. a compensator; 6. an open hole packer; 7. and (4) a well flushing valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: a primary pipe column subsection sand prevention tool comprises a main sleeve 1 and a sand filtering pipe 3, wherein a grading hoop 2, a filling sliding sleeve assembly 4, a sand filtering pipe 3, a compensator 5, an open hole packer 6 and a well washing valve 7 are sequentially connected on the main sleeve 1, the sand filtering pipe 3 comprises an inner sand filtering pipe 31, a filtering pipe 33 and an outer sand filtering pipe 32 which are sequentially sleeved on the outer side of the inner sand filtering pipe 31, a plurality of coarse filtering holes 310 are uniformly formed in the outer wall of the outer sand filtering pipe 32, the outer sand filtering pipe 32 is connected with the filtering pipe 33 through a plurality of reinforcing rods 34, a primary sand filtering body 35 is filled between the filtering pipe 33 and the outer sand filtering pipe 32, a plurality of primary fine filtering holes 37 are formed in the inner wall of the filtering pipe 33, the primary fine filtering holes 37 are located between the adjacent reinforcing rods 34, a secondary sand filtering body 38 is arranged between the inner sand filtering pipe 31 and the filtering pipe 33, a plurality of secondary fine filtering holes 39 are formed in the inner wall of the inner sand filtering pipe, the primary fine filtering holes 37 and the secondary fine filtering holes 39 are both in the shape of truncated cones, and the ends of the primary fine filtering holes 37 and the secondary fine filtering holes 39, which are small in diameter, are located on the outer sides.

Furthermore, the reinforcing rod 34 is in a quadrangular frustum pyramid shape, and one end of the reinforcing rod 34 with a large length is fixedly connected with the outer sand screen 32.

Furthermore, a filtering layer 36 is arranged between the filtering pipe 33 and the outer sand filtering pipe 32, filtering layers 36 are arranged between the secondary sand filtering body 38 and the filtering pipe 33 and the inner sand filtering pipe 31, and the pore sizes of the filtering layers 36 at the three positions are different.

Further, the diameter of the outer side of the first-stage fine filtering hole 37 is larger than that of the outer side of the second-stage fine filtering hole 39, the first-stage fine filtering hole 37 is positioned between the adjacent second-stage fine filtering holes 39, and the aperture of the coarse filtering hole 310 is larger than that of the outer side of the first-stage fine filtering hole 37.

Further, the first-stage sand filtering body 35 and the second-stage sand filtering body 38 both adopt quartz sand filtering bodies, and the granularity of the quartz sand of the first-stage sand filtering body 35 is larger than that of the quartz sand of the second-stage sand filtering body 38.

The working principle is as follows: when in use, the oil field positioned outside the sand filtering pipe 3 enters the sand filtering pipe 3 through the coarse filtering holes 310, and primary filtering is carried out on impurities contained in the oil field through the primary sand filtering body 35. The oil field on the outer side generates certain extrusion force on the sand filtering pipe 3, the reinforcing rod 34 is arranged to improve the extrusion resistance of the outer sand filtering pipe 32 and prolong the service life of the outer sand filtering pipe, the oil field filtered by the primary sand filtering body 35 enters the filtering pipe 33 after being filtered by the filtering layer 36, the filtering layer 36 at the position can prevent part of the primary sand filtering body 35 from entering the filtering pipe 33 on one hand and filter the oil field after passing through the filtering pipe 33 sequentially through the filtering layer 36 and the secondary sand filtering body 38 and then enters the inner sand filtering pipe 31 on the other hand, the filtering layer 36 at the two sides of the secondary sand filtering body 38 can reduce the possibility that quartz sand enters the primary fine filtering hole 37 and the secondary fine filtering hole 39 to avoid the blockage of the oil field, and the quartz sand with different particle sizes of the primary sand filtering body 35 and the secondary sand filtering body 38 is filtered, the cost is low, the sand filtering pipe 3 is divided into a plurality of layers for filtering, the filtering effect is obvious, and the structure is simple.

The staged collar 2, the filling sliding sleeve assembly 4, the compensator 5, the open hole packer 6 and the flushing valve 7 are well known in the art, and the structure is not described in detail.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a primary tubular column segmentation sand control instrument which characterized in that: the sand filtering device comprises a main sleeve (1) and a sand filtering pipe (3), wherein a grading hoop (2), a filling sliding sleeve assembly (4), the sand filtering pipe (3), a compensator (5), an open hole packer (6) and a well washing valve (7) are sequentially connected to the main sleeve (1), the sand filtering pipe (3) comprises an inner sand filtering pipe (31), a filtering pipe (33) and an outer sand filtering pipe (32) which are sequentially sleeved on the outer side of the inner sand filtering pipe (31), a plurality of coarse filtering holes (310) are uniformly formed in the outer wall of the outer sand filtering pipe (32), the outer sand filtering pipe (32) is connected with the filtering pipe (33) through a plurality of arranged reinforcing rods (34), a primary sand filtering body (35) is filled between the filtering pipe (33) and the outer sand filtering pipe (32), a plurality of primary fine filtering holes (37) are formed in the inner wall of the filtering pipe (33), the primary fine filtering holes (37) are located between the adjacent reinforcing rods (34), and a secondary sand filtering body (38) is arranged between the inner sand filtering pipe (31) and the filtering pipe (33), a plurality of second-stage fine filtering holes (39) are formed in the inner wall of the inner sand filtering pipe (31), the first-stage fine filtering holes (37) and the second-stage fine filtering holes (39) are in the shape of circular truncated cones, and one ends of the first-stage fine filtering holes (37) and the second-stage fine filtering holes (39) which are small in diameter are located on the outer side.

2. The primary string segment sand control tool of claim 1, wherein: the reinforcing rod (34) is in a quadrangular frustum pyramid shape, and one end of the reinforcing rod (34) with large length is fixedly connected with the outer sand filtering pipe (32).

3. The primary string segment sand control tool of claim 1, wherein: a filter layer (36) is arranged between the filter pipe (33) and the outer sand filtering pipe (32), filter layers (36) are arranged between the secondary sand filtering body (38) and the filter pipe (33) and between the secondary sand filtering body and the inner sand filtering pipe (31), and the pore sizes of the three filter layers (36) are different.

4. The primary string segment sand control tool of claim 1, wherein: the diameter of the outer side of the first-stage fine filtering hole (37) is larger than that of the outer side of the second-stage fine filtering hole (39), the first-stage fine filtering hole (37) is positioned between the adjacent second-stage fine filtering holes (39), and the aperture of the coarse filtering hole (310) is larger than that of the outer side of the first-stage fine filtering hole (37).

5. The primary string segment sand control tool of claim 1, wherein: the first-stage sand filtering body (35) and the second-stage sand filtering body (38) both adopt quartz sand filtering bodies, and the granularity of the quartz sand of the first-stage sand filtering body (35) is larger than that of the quartz sand of the second-stage sand filtering body (38).