CN201581819U

CN201581819U - Rotary joint for well completion

Info

Publication number: CN201581819U
Application number: CN2009202489746U
Authority: CN
Inventors: 邓旭; 余雷; 喻晨; 李敬东; 吴兴国; 李敏; 尚宪飞; 苏涛; 朱太辉; 陈振刚; 张雪; 赵云; 李耀辉; 孙红玉
Original assignee: CNPC Great Wall Drilling Co
Current assignee: CNPC Great Wall Drilling Co
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2010-09-15
Anticipated expiration: 2019-11-27

Abstract

The utility model provides a rotary joint for well completion of oil wells, gas wells and water wells in an oil field, which consists of an upper joint, an anti-loosening screw, an outer sleeve, a sealing ring, a spring, a spherical top sleeve, a spherical joint sealing ring and a spherical joint; an inner thread of the upper end of the upper joint is connected with an outer thread of a well completion pipe column; the lower end of the upper joint is connected with the outer sleeve by the thread; the upper joint is fixed by the anti-loosening screw after being screwed tightly with the outer sleeve; the sealing ring is arranged in a sealing annular groove which is arranged at the lower part of the upper joint so as to form a seal with the inner surface of the outer sleeve; the lower part of the upper joint is closely contacted with the spring; the spherical top sleeve presses on the upper part of the spherical joint; the spherical top sleeve is closely matched with the spherical joint and is sealed by the spherical joint sealing ring; the spherical top sleeve passes through the inner part of the spring; the outer sleeve is closely contacted with the spherical joint and is sealed by the spherical joint sealing ring; the spherical joint rotates and swings in a spherical seat formed by the outer sleeve and the spherical top sleeve; and the joint solves the problems that the completion pipe column in the prior art is difficult to drill in place so as to affect well completion speed. The rotary joint can be widely applied to the well completion operation of the oil wells, the gas wells and the water wells.

Description

A kind of completion swivel joint

Technical field:

The utility model relates to a kind of completion swivel joint that oil field oil, gas, well completion are used.

Background technology:

Along with the oil field enters the middle and later periods exploitation, horizontal well, sidetracked hole, multilateral well drilling well get more and more.Needs and hole trajectory control factor for geology and engineering, the hole curvature of these wells is often bigger, it is not in place or not in place down usually to be lowered to difficulty because of factors such as tubing string rigidity and pipe frictions when completion tubular column is lowered to, and has influenced brill completion progress, has increased completion period and cost.At present, also do not have the corresponding servicing unit of dependable performance to reduce the tubing string rigidity in the The field, fall low friction resistance.Therefore be necessary to develop a kind of device, guarantee that completion tubular column is lowered into design attitude smoothly, reduce completion period and cost.

The utility model content:

The purpose of this utility model provides a kind of completion swivel joint, this joint solved under the completion tubular column that exists in the prior art fashionable because of factors such as tubing string rigidity and pipe friction be lowered to the difficulty not in place, the completion progress is bored in influence, increases the problem of completion period and cost.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of completion is made up of top connection, backing-up screw, overcoat, sealing ring, spring, dome cover, globe joint sealing ring, globe joint with swivel joint; Top connection upper end internal thread is connected with the completion tubular column external screw thread, and its lower end is connected with sleeve thread; Top connection and overcoat screw the back and fix with backing-up screw, and sealing ring is packed in the closure gasket groove of top connection bottom, form sealing with the overcoat inner surface; The top connection lower end surface closely contacts with spring, and spring is in compressive state, and the dome cover is pressed in globe joint top; Dome cover bottom is that the spherical outer surface of spherical inside surface and globe joint closely cooperates, and utilizes the sealing of globe joint sealing ring; The dome cover is for stepped, and its top penetrates spring inner; The overcoat lower inner surface is that spherical closely contacts with globe joint, and seals with the globe joint sealing ring; The inner cylinder face of the external cylindrical surface of globe joint and overcoat bottom has certain interval, between the two can around axis freely rotate and certain limit in circumferential swing; The sphere of globe joint overlaps rotation and swing in the formed ball seat at overcoat and dome, and the dome cover is followed the flexible trace adjustment that realizes contact force of spring trace under certain responsive to axial force, guarantee to have good flexibility between globe joint and the top connection, reduce the pipe friction resistance, reduce completion tubular column and be lowered to the possibility that is hampered.

The beneficial effects of the utility model are that simple in structure, convenient and quick construction improves the completion effect, reduces operating cost; This swivel joint adopts axial adjustable clearance type spherical linkage to form swivel joint, not only can rotate around axis, and can adjust the axial contact gap in junction by trace, has bigger circumferential hunting range.

Description of drawings:

Accompanying drawing is the utility model overall structure schematic diagram.

Among the figure 1, top connection, 2, backing-up screw, 3, overcoat, 4, sealing ring, 5, spring, 6, the dome cover, 7, the globe joint sealing ring, 8, globe joint.

The specific embodiment:

In the accompanying drawings, a kind of completion swivel joint is made up of top connection 1, backing-up screw 2, overcoat 3, sealing ring 4, spring 5, dome cover 6, globe joint sealing ring 7, globe joint 8; Top connection 1 upper end internal thread is connected with the completion tubular column external screw thread, and its lower end is threaded with overcoat 3; It is fixing with backing-up screw 2 that top connection 1 and overcoat 3 screw the back, and sealing ring 4 is packed in the closure gasket groove of top connection 1 bottom, forms sealing with overcoat 3 inner surfaces; Top connection 1 lower end surface closely contacts with spring 5, and spring 5 is in compressive state, and stays certain shrink space; Dome cover 6 is pressed in globe joint 8 tops; It is that the spherical outer surface of spherical inside surface and globe joint 8 closely cooperates that dome is overlapped 6 bottoms, with 7 sealings of globe joint sealing ring; Dome cover 6 is stepped, and its top penetrates spring 5 inside; Overcoat 3 lower inner surface are that spherical closely contacts with globe joint 8, and seal with globe joint sealing ring 7; The inner cylinder face of the external cylindrical surface of globe joint 8 and overcoat 3 bottoms has certain interval, between the two can around axis freely rotate and certain limit in circumferential swing; The sphere of globe joint 8 overlaps rotation and swing in the 6 formed ball seats at overcoat 3 and dome, and dome cover 6 is followed the flexible trace adjustment that realizes contact force of spring 5 trace under certain responsive to axial force, guarantee to have good flexibility between globe joint 8 and the top connection 1, reduce the pipe friction resistance, reduce completion tubular column and be lowered to the possibility that is hampered.

Claims

1. a completion is made up of top connection (1), backing-up screw (2), overcoat (3), sealing ring (4), spring (5), dome cover (6), globe joint sealing ring (7), globe joint (8) with swivel joint, it is characterized in that; Top connection (1) upper end internal thread is connected with the completion tubular column external screw thread, and its lower end is threaded with overcoat (3); It is fixing with backing-up screw (2) that top connection (1) and overcoat (3) screw the back, and sealing ring (4) is packed in the closure gasket groove of top connection (1) bottom, forms sealing with overcoat (3) inner surface; Top connection (1) lower end surface closely contacts with spring (5), and spring (5) is in compressive state, and dome cover (6) is pressed in globe joint (8) top; Dome cover (6) bottom is that the spherical outer surface of spherical inside surface and globe joint (8) closely cooperates, with globe joint sealing ring (7) sealing; Dome cover (6) is stepped, and its top penetrates spring (5) inside; Overcoat (3) lower inner surface is that spherical closely contacts with globe joint (8), and seals with globe joint sealing ring (7); The inner cylinder face of the external cylindrical surface of globe joint (8) and overcoat (3) bottom has certain interval, between the two can around axis freely rotate and certain limit in circumferential swing; The sphere of globe joint (8) rotates in overcoat (3) and the formed ball seat of dome cover (6) and swings, and dome cover (6) is followed the flexible trace adjustment that realizes contact force of spring (5) trace under certain responsive to axial force, guarantees to have good flexibility between globe joint (8) and the top connection (1).