CN103256019A

CN103256019A - Horizontal well dragging crushing high-pressure packer

Info

Publication number: CN103256019A
Application number: CN2013101650549A
Authority: CN
Inventors: 霍春林; 项凤义; 秦俊奎
Original assignee: FUXIN CHIYU PETROLEUM MACHINERY Co Ltd
Current assignee: FUXIN CHIYU PETROLEUM MACHINERY Co Ltd
Priority date: 2013-05-08
Filing date: 2013-05-08
Publication date: 2013-08-21

Abstract

The invention belongs to oil exploitation equipment, and particularly relates to a horizontal well dragging crushing high-pressure packer. The horizontal well dragging crushing high-pressure packer comprises a central pipe (1), back caps (2), pins (4) and a rubber barrel (7), wherein the rubber barrel (7) is fixedly arranged in the middle of the periphery of the central pipe (1) of the packer, a round protruded platform is arranged in the middle of the rubber barrel (7), the periphery of the upper end and the periphery of the lower end of the protruded platform of the rubber barrel (7) are connected with inner pressure bearing rings (5), and the axial section of each inner pressure bearing ring (5) is in an L shape. The periphery of each inner pressure bearing ring (5) is connected with an outer pressure bearing ring (6), the shape of each outer pressure bearing ring (6) is matched with the L shape of each inner pressure bearing ring (5), and the axial section of each outer pressure bearing ring (6) is in a knife shape. A plurality of inner pressure bearing ring axial grooves (5-1) and a plurality of outer pressure bearing ring axial grooves (6-1) are arranged on the circumferential wall of each inner pressure bearing ring (5) and each outer pressure bearing ring (6) respectively at equal intervals from bottom to upper middle portion in the axial direction, the inner pressure bearing rings (5) and the inner pressure bearing ring axial grooves (5-1), and the outer pressure bearing rings (6) and the outer pressure bearing ring axial grooves (6-1) are arranged inside press rings (3) respectively in a crossed mode and are located through the pins (4). The horizontal well dragging crushing high-pressure packer is good in sealing property, long in service life, safe, and reliable.

Description

Horizontal well drags pressure break high pressure packer

Technical field

The invention belongs to oil exploration equipment, particularly a kind of horizontal well drags pressure break high pressure packer.

Background technology

At present, horizontal well drags technical indicator and the demands for higher performance of fracturing technology to dragging the pressure break packer, resistance to compression difference 80Mpa, 120 ℃ of heatproofs are finished 10 sections of pressure break hop counts, after pressure break is finished the packer deblocking thoroughly, drag smoothly.Now used packer is made of central tube, back of the body cap, pressure ring, packing element, in order to guarantee to be lowered to smoothly in the pit shaft, the packer maximum outside diameter must be less than the pit shaft internal diameter, the change of packing element diameter is close to greatly and forms sealing on the shaft in wall after the packer set, after the end thrust that the well liquid that is closed produces packing element was elevated to certain value, packing element can produce axial flow along sealed spacer and cause seal failure at last.So both influence the application life of packer, influenced the production of oil well simultaneously.

Summary of the invention

The objective of the invention is to overcome above-mentioned technical deficiency, provide a kind of simple in structure, seat envelope is effective, the horizontal well that can prolong packer application life drags pressure break high pressure packer.

The technical scheme that technical solution problem of the present invention adopts is: horizontal well drags pressure break high pressure packer and comprises central tube, back of the body cap, pin, packing element, be characterized in that the packing element that the boss platform is with at the middle part fixedly is equipped with at the place in the middle of the central tube periphery of packer, in packing element boss place, following two ends peripheral connection dress axial cross section is L shaped interior bearing ring, in the connection of the periphery of interior bearing ring the axial cross section that coincide with interior bearing ring L profile being housed is the outer bearing ring of knife-edge, on the circumferential wall of interior bearing ring and outer bearing ring from bottom to position, middle and upper part vertically all in opening several bearing ring axial groove with outside the bearing ring axial groove, interior bearing ring, outer bearing ring becomes intervening portion to be installed in the pressure ring and with pin with interior bearing ring axial groove with outer bearing ring axial groove to locate.

The invention has the beneficial effects as follows: packing element elastic deformation when horizontal well drags pressure break high pressure packer voltage rise is high in central tube, promote inside and outside bearing ring diameter change simultaneously and be close to formation sealing on the shaft in wall greatly, after end thrust is raised to certain value, the inner bearing ring of packing element and outer bearing ring elastic deformation diameter become greatly and sleeve pipe sturdy, realize the seat envelope, make the good seal performance of packer, long service life, safe and reliable.

Description of drawings

Specify with embodiment below in conjunction with accompanying drawing.

Fig. 1 is that horizontal well drags pressure break high pressure packer construction half sectional view.

Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.

Among the figure, the 1-central tube; 2-carries on the back cap; The 3-pressure ring; 3-1-pressure ring boss; The 4-pin; Bearing ring in the 5-; Bearing ring axial groove in the 5-1-; The outer bearing ring of 6-; The outer bearing ring axial groove of 6-1-; The 7-packing element.

The specific embodiment

Embodiment, with reference to accompanying

drawing

1,2, it is the peripheral packing element 7 that middle part band boss platform fixedly is housed in the middle part of central tube 1 that horizontal well drags pressure break high pressure packer, adorning axial cross section in the peripheral connection of the boss place of packing element 7 upper/lower terminal is L shaped interior bearing ring 5, connect in the periphery of interior bearing ring 5 that the axial cross section that coincide with interior bearing ring 5 L profiles is housed is the outer bearing ring 6 of knife-edge, on the circumferential wall of interior bearing ring 5 and outer bearing ring 6 from bottom to position, middle and upper part vertically all apart from open 12 interior bearing ring axial groove 5-1 with outside bearing ring axial groove 6-1.Interior bearing ring 5, outer bearing ring 6 become intervening portion to be installed in the pressure ring 3 with interior bearing ring axial groove 5-1 with outer bearing ring axial groove 6-1, and locate with pin 4.Be threaded with central tube 1 with back of the body cap 2 in the outer face of pressure ring 3 pressure ring 3 is fixed.On the outer circumference surface of pressure ring 3 all apart from establishing several pressure ring boss 3-1.

The course of work that horizontal well drags pressure break high pressure packer is: after liquid filling pressure in the central tube 1 raises, packing element 7 elastic deformation diameters swell, promote staggeredly to be sleeved on packing element 7 external diameters simultaneously, interior bearing ring 5 and outer bearing ring 6 elastic deformation diameters in pressure ring 3 endoporus become big sturdy with sleeve pipe, realize sealing.After the end thrust that the well liquid that is closed produces packing element 7 is elevated to certain value, the axial flow trend that packing element 7 produces along sealed spacer by interior bearing ring 5 and outside bearing ring 6 stop that so packing element 7 damage of can not outflowing has kept sealing performance.After central tube 1 internal drop was low, packing element 7 is elastical retraction at first, and after interior bearing ring 5 and outer bearing ring 6 lost packing element 7 supports, internal surface of sleeve pipe was left in resilience under self elastic reaction, and it is thorough to reach the packer deblocking, drags purpose smoothly.

Claims

1. a horizontal well drags pressure break high pressure packer, comprise central tube (1), back of the body cap (2), pin (4), packing element (7), it is characterized in that the peripheral middle packing element (7) of locating fixedly to be equipped with middle part band boss platform of central tube (1) at packer, in packing element (7) boss place, following two ends peripheral connection dress axial cross section is L shaped interior bearing ring (5), in the connection of the periphery of interior bearing ring (5) axial cross section that coincide with interior bearing ring (5) L profile being housed is the outer bearing ring (6) of knife-edge, interior bearing ring (5) and outside on the circumferential wall of bearing ring (6) from bottom to position, middle and upper part vertically all in opening several bearing ring axial groove (5-1) and outside bearing ring axial groove (6-1), interior bearing ring (5), outer bearing ring (6) becomes intervening portion to be installed in the pressure ring (3) with interior bearing ring axial groove (5-1) and uses pin (4) location with outer bearing ring axial groove (6-1).