CN202108462U

CN202108462U - Combined type inserted sealing device

Info

Publication number: CN202108462U
Application number: CN2011201947922U
Authority: CN
Inventors: 肖国华; 王金忠
Original assignee: China Petroleum and Natural Gas Co Ltd
Current assignee: China Petroleum and Natural Gas Co Ltd
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2012-01-11
Anticipated expiration: 2021-06-10

Abstract

A combined type inserted sealing device is applicable to inserted sealing of oil underground intubation packers or bridge plugs. A centering joint is provided with a centering end, the outer wall of which is provided with an axial groove, and the lower part of the centering end is a conical surface; the lower end of the centering joint is connected with an intubation tube by threads, and a sealing group is sheathed on the outer wall of the intubation tube; the lower end of the intubation tube is connected with a middle joint by threads, and an O-shaped sealing ring is formed between the middle joint and the intubation tube; a sealing group is sheathed on the outer wall of the middle joint; and the lower end of the middle joint is connected with a orientation guide shoe by threads, and an O-shaped sealing ring is arranged between the middle joint and the orientation guide shoe. The combined type inserted sealing device has the effects that the combined type inserted sealing device and a packer body adopt movable sealing, and when a tubular column works normally, the wriggle of the tubular column does not influence the packer. The combined type inserted sealing device solves the problems that the sealing ring is easy to mistake sections and drop in the prior art, is convenient and rapid in field construction, has a good sealing property, and can effectively reduce the times for replacing the sealing ring and enhance the working efficiency.

Description

Combined type inserts sealing device

Technical field

The utility model relates to petroleum machinery oil recovery field, and the device of particularly a kind of down-hole seal and pressure bearing is that a kind of combined type of intubate packer or bridging plug inserts sealing device.

Background technology

At present; Along with constantly carrying out of Oilfield developing; Intubate packer and bridging plug be as the kit of oilfield downhole operation, in separate zone production, and separate layer acid treatment, pressure break; Extensive use in the measure operations such as the temporary transient or permanent shutoff of replacement bridging plug lower floor has important effect in the field produces operation.There are some problems in intubation seal device commonly used when carrying out the seal and pressure bearing operation; Mainly show intubation seal device in the process that insertion is extracted sealing ring fallibility section with come off; The wriggling of tubing string can influence and packer sealing, has limited the carrying out of follow-up underground work.

The utility model content

The purpose of the utility model is: provide a kind of combined type to insert sealing device, adopt movable sealing, can realize sealing with the packer body, sealing is reliable during the tubing string operate as normal.

The technical scheme that the utility model adopts is: combined type inserts sealing device; Mainly form by setting upright joint, intubate, seal group, transition joint, O-ring seals and guiding guide shoe; Internal thread is arranged at the top setting upright joint; Can be connected on the tubing string, setting upright joint has outer wall to have the end of setting upright of axial groove, and the bottom of setting upright end is a taper seat; There is external screw thread lower end setting upright joint, is connected with intubate at the lower end screw thread of setting upright joint, it is characterized in that: on the outer wall of intubate, be with seal group; Screw thread is connected with transition joint in the lower end of intubate, between transition joint and the intubate O-ring seals is arranged; On the outer wall of transition joint, be with seal group; Screw thread is connected with the guiding guide shoe in the lower end of transition joint, between transition joint and the guiding guide shoe O-ring seals is arranged.

Described seal group is made up of concave support ring, v-ring, convex support ring, L shaped protection ring and T shape sealing ring; Concave support ring, v-ring, convex support ring, L shaped protection ring and T shape sealing ring are enclosed within intubate or the transition joint; Be the bottom of concave support ring set at the step surface of intubate or transition joint; At 2～8 v-rings of the bottom of concave support ring cover; Cover convex support ring overlaps L shaped protection ring in the bottom of convex support ring in the bottom of v-ring, the bottom cover T shape sealing ring of L shaped protection ring.

Intubate packer or bridging plug accomplish set give up after, combined type is inserted in the central tube that sealing device is inserted into packer, form good sealing with the central tube inner surface, thereby packing oil jacket space.

The beneficial effect of the utility model: the utility model combined type inserts sealing device, and combined type inserts sealing device and the packer body adopts movable sealing, and during the tubing string operate as normal, the wriggling of tubing string can not impact packer.Solved prior art and had sealing ring fallibility section and the problem that comes off, convenient, the good seal performance of construction operation can effectively reduce the number of times that sealing ring is changed, and increases work efficiency.

Description of drawings

Fig. 1 is that the utility model combined type inserts the sealing device structure generalized section.

Fig. 2 is the structural profile sketch map of seal group.

Among the figure, 1-sets upright joint, 2-intubate, 3-seal group, 4-transition joint, 5-O shape sealing ring, the 6-guide shoe that leads, 7-concave support ring, 8-joint ring, 9-convex support ring, 10-L shape protection ring, 11-T shape sealing ring.

The specific embodiment

Embodiment 1: inserting sealing device with a combined type is example, and the utility model is done further explain.

Consult Fig. 1.The utility model combined type inserts sealing device; Mainly form by setting upright joint 1, intubate 2, seal group 3, transition joint 4, O-ring seals 5 and guiding guide shoe 6; Internal thread is arranged at the top setting upright joint 1; Setting upright joint 1 has outer wall to have the end of setting upright of axial groove, and the bottom of setting upright end is a taper seat; There is external screw thread lower end setting upright joint 1, is connected with intubate 2 at the lower end screw thread of setting upright joint 1.On the outer wall of intubate 2, be with seal group 3; Screw thread is connected with transition joint 4 in the lower end of intubate 2, between transition joint 4 and the intubate 2 twice O-ring seals 5 is arranged; On the outer wall of transition joint 4, be with seal group 3; Screw thread is connected with guiding guide shoe 6 in the lower end of transition joint 4, between transition joint 4 and the guiding guide shoe 6 twice O-ring seals 5 is arranged.The external diameter of intubate 2 lower end external diameters, transition joint 4 external diameters and the guide shoe 6 that leads is identical.

Consult Fig. 2.Described seal group 3 is made up of concave support ring 7, v-ring 8, convex support ring 9, L shaped protection ring 10 and T shape sealing ring 11.One group of seal group 3 is enclosed within on the intubate 2; Another group seal group 3 is enclosed within the transition joint 4.Two groups of seal group 3 are respectively the bottoms that a concave support ring 7 is enclosed within the step surface of intubate 2 or transition joint 4; At two v-rings 8 of the bottom of concave support ring 7 cover; At convex support ring 9 of the bottom of v-ring 8 cover; At L shaped protection ring 10 of the bottom of convex support ring 9 cover, the bottom cover T shape sealing ring 11 of L shaped protection ring 10.

Claims

1. a combined type inserts sealing device; Mainly form by setting upright joint (1), intubate (2), seal group (3), transition joint (4), O-ring seals (5) and guiding guide shoe (6); Internal thread is arranged at the top setting upright joint (1); Setting upright joint (1) has outer wall to have the end of setting upright of axial groove, and the bottom of setting upright end is a taper seat; There is external screw thread lower end setting upright joint (1), is connected with intubate (2) at the lower end screw thread of setting upright joint (1), it is characterized in that: on the outer wall of intubate (2), be with seal group (3); Lower end screw thread in intubate (2) is connected with transition joint (4), between transition joint (4) and the intubate (2) O-ring seals (5) is arranged; On the outer wall of transition joint (4), be with seal group (3); Lower end screw thread in transition joint (4) is connected with guiding guide shoe (6), between transition joint (4) and the guiding guide shoe (6) O-ring seals (5) is arranged;

Described seal group (3) is made up of concave support ring (7), v-ring (8), convex support ring (9), L shaped protection ring (10) and T shape sealing ring (11); Concave support ring (7), v-ring (8), convex support ring (9), L shaped protection ring (10) and T shape sealing ring (11) are enclosed within intubate (2) or the transition joint (4); It is the bottom that concave support ring (7) is enclosed within the step surface of intubate (2) or transition joint (4); Cover 2～8 v-rings (8) in the bottom of concave support ring (7); The cover convex support ring (9) in the bottom of v-ring (8); Overlap L shaped protection ring (10) in the bottom of convex support ring (9), the bottom cover T shape sealing ring (11) of L shaped protection ring (10).