CN211370343U

CN211370343U - Expanding packer with strong bearing capacity

Info

Publication number: CN211370343U
Application number: CN201921931594.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: Dongying Huachen Petroleum Equipment Co ltd
Current assignee: Dongying Huachen Petroleum Equipment Co ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-08-28
Anticipated expiration: 2029-11-11

Abstract

The utility model provides an expanding packer that bearing capacity is strong, relates to downhole tool field, including top connection, lower clutch, center tube and packing element, top connection and lower clutch are respectively through threaded connection at the upper and lower both ends of center tube, and the packing element cover is in the outside of center tube, be provided with the ring channel on the packing element, the cross section of ring channel is isosceles trapezoid, and isosceles trapezoid's upper base is located the bottom surface of ring channel, and the upper and lower both sides of ring channel respectively are provided with the flange that the round was made by the steel sheet. The upper joint is provided with a one-way valve, and the conduction direction of the one-way valve is from the outer side of the upper joint to the inner side of the upper joint. The structure of flange includes conical surface portion and kink, conical surface portion attached in the inboard of ring channel, the kink is folded on the face of cylinder in the packing element outside. The utility model discloses a set up the ring channel on the packing element to set up steel flange in the upper and lower both sides of ring channel, can effectively restrain the wriggling behind the packing element pressure-bearing, thereby effectively improve the bearing capacity of both sides about the packer.

Description

Expanding packer with strong bearing capacity

Technical Field

The utility model belongs to the technical field of the oil field instrument in the pit, especially, relate to an expanding packer that bearing capacity is strong.

Background

An expandable packer is an important type of packer. The structure of the packer comprises a central tube and a rubber tube, wherein the rubber tube is sleeved on the outer side of the central tube, and when the packer is set, the rubber tube is pressed in the central tube, pressure enters the space between the central tube and the rubber tube, the rubber tube bulges outwards under the action of the pressure, and the outer wall of the rubber tube is finally attached to the inner wall of the sleeve, so that the space on the upper side and the space on the lower side of the packer are isolated. However, the existing expanding packer has poor pressure bearing capacity, which limits the application range of the packer, so that a new packer with higher pressure bearing capacity is needed to be designed.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem who exists among the background art, the utility model provides an expanding packer that bearing capacity is strong.

The utility model provides a technical problem adopt following technical scheme to realize: the utility model provides an expanding packer that bearing capacity is strong, including top connection, lower clutch, center tube and packing element, top connection and lower clutch are respectively through threaded connection at the upper and lower both ends of center tube, and the packing element cover is in the outside of center tube, be provided with the ring channel on the packing element, the cross section of ring channel is isosceles trapezoid, and isosceles trapezoid's upper base is located the bottom surface of ring channel, and the upper and lower both sides of ring channel respectively are provided with the flange that the round was made by the steel sheet.

The upper joint is provided with a one-way valve, and the conduction direction of the one-way valve is from the outer side of the upper joint to the inner side of the upper joint. The number of the annular grooves is two. The structure of each flange comprises a conical surface part and a bent part, the conical surface part is attached to the inner side of the annular groove, and the bent part is bent to the cylindrical surface on the outer side of the rubber cylinder.

The utility model has the advantages that: the utility model discloses a set up the ring channel on the packing element to set up steel flange in the upper and lower both sides of ring channel, can effectively restrain the wriggling behind the packing element pressure-bearing, thereby effectively improve the bearing capacity of both sides about the packer.

Drawings

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

FIG. 2 is a schematic view of the rib in an expanded configuration;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

fig. 4 is a partially enlarged view of the point B in fig. 1, i.e., the check valve.

In the figure: 1-upper joint, 2-central tube, 3-rubber cylinder, 4-lower joint, 5-annular groove, 6-flange, 7-one-way valve, 8-bending part, 9-conical surface part, 10-upper shield, 11-filter screen, 12-lower shield, 13-liquid passing hole and 14-liquid passing channel.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in fig. 1, the present embodiment includes top connection 1, lower clutch 4, center tube 2 and packing element 3, top connection 1 and lower clutch 4 are respectively through threaded connection at the upper and lower both ends of center tube 2, packing element 3 overlaps in the outside of center tube 2, when setting, suppress in center tube 2, pressure gets into the back between center tube 2 and packing element 3 through crossing liquid hole 13 and crossing liquid passageway 14, packing element 3 is outwards uplifted under the pressure effect, the outer wall of packing element 3 finally laminates on sheathed tube inner wall to the space isolation of both sides about with the packer. The above is a common structure in the prior art, and is not described herein again.

The rubber cylinder 3 is provided with an annular groove 5, the cross section of the annular groove 5 is isosceles trapezoid, and the upper bottom of the isosceles trapezoid is positioned on the bottom surface of the annular groove 5. In the actual production, the adhered to inside pipe wall of packing element 3 often is the unevenness, under this condition, the utility model discloses a set up ring channel 5, can fall into mutually independent three face with packing element 3 and sheathed tube contact surface, the existence in gap (being ring channel 5) between two adjacent contact surfaces can effectively increase the frictional force between packing element 3 and the inside pipe wall to improve the bearing capacity of packer.

The upper side and the lower side of the annular groove 5 are respectively provided with a circle of flanges 6 made of steel plates, and the flanges 6 are arranged to form hard isolation at the annular groove 5, so that the rubber sleeve 3 is effectively prevented from creeping after bearing, and the bearing capacity of the packer is further improved.

The upper joint 1 is provided with a one-way valve 7, and the conduction direction of the one-way valve 7 is from the outer side of the upper joint 1 to the inner side of the upper joint 1. Through injecting water to the oil sleeve annulus, hot water can be doped into the central tube 2, thereby achieving the purpose of paraffin removal without stopping production.

The structure of the flange 6 comprises a conical surface part 9 and a bending part 8, the conical surface part 9 is attached to the inner side of the annular groove 5, and the bending part 8 is folded towards the cylindrical surface of the outer side of the rubber cylinder 3. The flange 6 can be bonded on the rubber cylinder 3, and the flange 6 can be formed by encircling a plurality of arc sections, thereby better adapting to the expansion process of the rubber cylinder 3.

In order to improve the water quality entering the inner side of the rubber cylinder 3, a filtering device can be arranged between the liquid passing hole 13 and the liquid passing channel 14, the structure of the filtering device comprises a filter screen shield and a filter screen 11, the filter screen shield is divided into an upper shield 10 and a lower shield 12, and the two shields are buckled together so as to contain the filter screen 11.

Claims

1. The utility model provides an expanding packer that bearing capacity is strong, includes top connection (1), lower clutch (4), center tube (2) and packing element (3), and top connection (1) and lower clutch (4) are respectively through threaded connection at the upper and lower both ends of center tube (2), and packing element (3) cover is in the outside of center tube (2), its characterized in that: the rubber cylinder (3) is provided with an annular groove (5), the cross section of the annular groove (5) is isosceles trapezoid, the upper bottom of the isosceles trapezoid is positioned on the bottom surface of the annular groove (5), and the upper side and the lower side of the annular groove (5) are respectively provided with a circle of flanges (6) made of steel plates.

2. The expandable packer of claim 1, wherein the expandable packer comprises: the upper joint (1) is provided with a one-way valve (7), and the conduction direction of the one-way valve (7) is from the outer side of the upper joint (1) to the inner side of the upper joint (1).

3. The expandable packer of claim 1, wherein the expandable packer comprises: the number of the annular grooves (5) is two.

4. The expandable packer of claim 1, wherein the expandable packer comprises: the structure of the flange (6) comprises a conical surface portion (9) and a bending portion (8), the conical surface portion (9) is attached to the inner side of the annular groove (5), and the bending portion (8) is bent to the cylindrical surface on the outer side of the rubber cylinder (3).