CN211287609U - High-sealing-performance external casing packer - Google Patents

Abstract

The utility model discloses a high sealing performance's external packer of cover, connect hoop pipe and first sealing washer including the second, the second connects the inside one side of hoop pipe and closely laminates and has first sealing washer, one side that the second was kept away from to first sealing washer is closely laminated and is had outer knot pipe, and outer knot pipe links to each other with second coupling pipe thread, one side screw thread that outer knot pipe was kept away from to second coupling intraduct links to each other has the center tube, first ferrule and second ferrule have been cup jointed in the activity respectively to the outer wall left and right sides of center tube. This external casing packer of high leakproofness ability through the inside clamp lining wire netting at the rubber sleeve, greatly increased the tensile ruptured intensity of rubber sleeve to avoided the rubber sleeve can't bear too big internal pressure and broken the damage, avoided the inside effect of packing of influential force oil well, made the rubber sleeve resume original shape through extension spring pulling second ferrule, thereby can make the operation that the rubber tube reconversion returned the drilling fluid when stopping carrying the drilling fluid.

Description

High-sealing-performance external casing packer

Technical Field

The utility model relates to a sleeve pipe external packer technical field specifically is a high leakproofness ability's sleeve pipe external packer.

Background

The completion of the external casing packer is implemented by means of external casing packer to implement separation of intervals, it can implement operation and production control according to the intervals, it is very important for oil field developed by water injection, and the completion method of external casing packer can be divided into three forms, namely external casing packer and slotted liner completion, external casing packer and sliding sleeve completion and external casing packer and liner perforation completion.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high leakproofness ability's set outside of tubes packer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a casing external packer with high sealing performance comprises a second coupling pipe and a first sealing ring, wherein the first sealing ring is tightly attached to one side inside the second coupling pipe, an external buckling pipe is tightly attached to one side, far away from the second coupling pipe, of the first sealing ring, the external buckling pipe is in threaded connection with the second coupling pipe, a central pipe is connected to one side, far away from the external buckling pipe, of the inside of the second coupling pipe through threads, the left side and the right side of the outer wall of the central pipe are respectively and movably sleeved with a first pipe hoop and a second pipe hoop, the first pipe hoop is in threaded connection with the second coupling pipe, the second sealing ring is clamped inside the first pipe hoop and tightly attached to the central pipe, a third sealing ring is clamped inside the second pipe hoop and tightly attached to the central pipe, openings are symmetrically formed in the upper side and the lower side of the inside of the central pipe, a wire mesh is movably sleeved in the middle of the outer wall of the central pipe, the outer wall and the inner wall of wire netting all are fixed to have cup jointed the rubber sleeve, and the inner wall left and right sides of rubber sleeve links to each other with first ferrule and second ferrule are fixed respectively, the sleeve has been cup jointed in the outer wall activity of second ferrule, and the sleeve links to each other with the center tube is fixed, one side rigid coupling that the rubber sleeve was kept away from to the second ferrule has extension spring, and extension spring and sleeve are fixed to link to each other, one side screw thread that the second was kept away from to the center tube links to each other and has first coupling pipe.

Compared with the prior art, the beneficial effects of the utility model are that: this external casing packer of high leakproofness ability, through the inside clamp lining wire netting at the rubber sleeve, greatly increased the tensile ruptured intensity of rubber sleeve, thereby avoided the rubber sleeve can't bear too big internal pressure and broken the damage, avoid the inside effect of packing of influential force oil well, make the rubber sleeve resume original shape through extension spring pulling second ferrule, thereby can make the operation that the rubber tube reconversion returned the drilling fluid when stopping carrying the drilling fluid, staff's use has been made things convenient for.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the outer buckle pipe, 2, first sealing washer, 3, center tube, 4, first ferrule, 5, second sealing washer, 6, opening, 7, sleeve, 8, extension spring, 9, first connect the hoop pipe, 10, third sealing washer, 11, second ferrule, 12, rubber sleeve, 13, wire netting, 14, second connect the hoop pipe.

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.

Referring to fig. 1, the present invention provides a technical solution: a casing external packer with high sealing performance comprises a second hoop connecting pipe 14 and a first sealing ring 2, wherein the first sealing ring 2 is tightly attached to one side of the inside of the second hoop connecting pipe 14, the first sealing ring 2 is made of rubber and can fill and seal a gap between the second hoop connecting pipe 14 and an external buckling pipe 1, the external buckling pipe 1 is tightly attached to one side, away from the second hoop connecting pipe 14, of the first sealing ring 2, the external buckling pipe 1 is in threaded connection with the second hoop connecting pipe 14, the external buckling pipe 1 can be screwed and fixed in the second hoop connecting pipe 14 in a rotating mode, a central pipe 3 is connected to one side, away from the external buckling pipe 1, of the inside of the second hoop connecting pipe 14 in a threaded mode, the left side and the right side of the outer wall of the central pipe 3 are respectively movably sleeved with a first pipe hoop 4 and a second pipe hoop 11, the first pipe hoop 4 is in threaded connection with the second hoop connecting pipe 14, the first pipe hoop 4 can be screwed and fixed in the second hoop connecting pipe 14 in a rotating mode, a second sealing ring 5 is clamped inside the first pipe hoop 4, the second sealing ring 5 is tightly attached to the central pipe 3, the second sealing ring 5 can play a sealing role, a third sealing ring 10 is clamped inside the second pipe hoop 11, the third sealing ring 10 is tightly attached to the central pipe 3, the second pipe hoop 11 can drive the third sealing ring 10 to slide on the outer wall of the central pipe 3, openings 6 are symmetrically formed in the upper side and the lower side of the inner part of the central pipe 3, a wire mesh 13 is movably sleeved in the middle of the outer wall of the central pipe 3, a rubber sleeve 12 is fixedly sleeved on the outer wall and the inner wall of the wire mesh 13, the left side and the right side of the inner wall of the rubber sleeve 12 are fixedly connected with the first pipe hoop 4 and the second pipe hoop 11 respectively, the wire mesh 13 can prevent the rubber sleeve 12 from being expanded and broken, drilling fluid is conveyed into the rubber sleeve 12 by the central pipe 3 through the openings 6, so that the rubber sleeve, sleeve 7 has been cup jointed in the outer wall activity of second coupling 11, and sleeve 7 links to each other with center tube 3 is fixed, one side rigid coupling that rubber sleeve 12 was kept away from to second coupling 11 has extension spring 8, and extension spring 8 links to each other with sleeve 7 is fixed, after stopping carrying the drilling fluid, can stimulate second coupling 11 slip home position under extension spring 8's pulling force, thereby make rubber sleeve 12 reconversion, thereby make the drilling fluid promoted back to the inside of center tube 3, one side screw thread that second coupling pipe 14 was kept away from to center tube 3 links to each other has first coupling pipe 9, first coupling pipe 9 can rotate to screw up and fix on center tube 3.

In the embodiment, when the packer is used, the packer is inserted into an oil well, the external buckling pipe 1 is connected with a casing of equipment, the first hoop connecting pipe 9 is connected with a casing of drilling equipment, when the packer is used, drilling fluid flows along the central pipe 3, meanwhile, part of the drilling fluid enters the inside of the rubber sleeve 12 along the opening 6 under the action of hydraulic pressure, the rubber sleeve 12 expands to overcome the tension of the tension spring 8 to pull the second hoop 11 to slide in the inside of the sleeve 7 along the outer wall of the central pipe 3, so that the rubber sleeve 12 expands to be closely attached to the inner wall of the oil well for sealing operation while drilling work is carried out, meanwhile, the iron wire 13 can increase the strength of the rubber sleeve 12 to prevent the rubber sleeve 12 from cracking due to overlarge expansion degree, when the drilling fluid stops flowing when the drilling is stopped, the second hoop 11 is pulled to move back under the tension of the tension spring 8, thereby causing the drilling fluid to flow back into the interior of the base pipe 3.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", 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 simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

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)

1. The utility model provides a high sealing performance's external casing packer, includes that second connects hoop pipe (14) and first sealing washer (2), the inside one side of second connects hoop pipe (14) is closely laminated and is had first sealing washer (2), its characterized in that: one side of the first sealing ring (2) far away from the second hoop connecting pipe (14) is tightly attached with an outer buckling pipe (1), the outer buckling pipe (1) is in threaded connection with the second hoop connecting pipe (14), one side of the second hoop connecting pipe (14) far away from the outer buckling pipe (1) is in threaded connection with a central pipe (3), the left side and the right side of the outer wall of the central pipe (3) are respectively movably sleeved with a first pipe hoop (4) and a second pipe hoop (11), the first pipe hoop (4) is in threaded connection with the second hoop connecting pipe (14), the inner portion of the first pipe hoop (4) is clamped with a second sealing ring (5), the second sealing ring (5) is tightly attached with the central pipe (3), the inner portion of the second pipe hoop (11) is clamped with a third sealing ring (10), the third sealing ring (10) is tightly attached with the central pipe (3), openings (6) are symmetrically formed in the upper side and the lower side of the inner portion of the central pipe (3), wire netting (13) have been cup jointed in the middle of the activity of the outer wall of center tube (3), the outer wall and the inner wall of wire netting (13) are all fixed to cup joint rubber sleeve (12), and the inner wall left and right sides of rubber sleeve (12) link to each other with first ferrule (4) and second ferrule (11) are fixed respectively, sleeve (7) have been cup jointed in the outer wall activity of second ferrule (11), and sleeve (7) are fixed continuous with center tube (3), one side rigid coupling that rubber sleeve (12) were kept away from in second ferrule (11) has extension spring (8), and extension spring (8) are fixed continuous with sleeve (7), one side screw thread that second connects hoop pipe (14) was kept away from in center tube (3) links to each other and has first hoop pipe (9).

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