CN203050626U

CN203050626U - Novel closable fracture sliding sleeve assembly

Info

Publication number: CN203050626U
Application number: CN 201320023730
Authority: CN
Inventors: 李旭冉; 杨祥祥; 王旱祥
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2013-01-16
Filing date: 2013-01-16
Publication date: 2013-07-10
Anticipated expiration: 2023-01-16

Abstract

The utility model relates to a novel closable fracture sliding sleeve assembly, and belongs to the technical field of multistage fracture downhole tools of oil and gas fields. The novel closable fracture sliding sleeve assembly is composed of a sliding sleeve closing tool and a closable fracture sliding sleeve. The sliding sleeve closing tool is composed of an upper joint, an upper pile casing, an upper ejector pad, a crank, a telescopic jaw, a lower ejector pad, a lower pile casing, a lower joint, an inner container, a spring A, a spring B and the like. The closable fracture sliding sleeve assembly comprises an upper joint A, a sliding sleeve, a ball seat, a pile casing, a lower joint A and the like. The outer side of the lower portion of the upper joint A is in threaded connection with the inner side of the upper portion of the pile casing through a TBG oil pipe. The outer side of the upper portion of the lower joint A is in threaded connection with the inner side of the lower portion of the pile casing through the TBG oil pipe. When the sliding sleeve closing tool and the closable fracture sliding sleeve are used in a matched mode, well sections severe in oil outlet, gas outlet, water outlet and the like can be closed selectively, well stimulation measures of fracture transformation, layered water injection and the like can be conducted, after field operation is completed, a fracture pipe column can be used as a normal production tubular column, not only work efficiency is improved, but also work cost is lowered, and oil well capacity is improved.

Description

The novel pressure break sliding sleeve assembly of closing

Affiliated technical field

The utility model relates to oil gas field separate stratum fracfturing downhole tool technical field, is a kind of novel pressure break sliding sleeve assembly of closing.

Background technology

In present horizontal well in segments pressure break well-completing process tubing string, underground fracture sliding sleeve instrument can be accurately opened in pitching in the well, carries out the pressing crack construction operation.But after construction operation is finished, because the sliding sleeve that uses can not effectively be closed the pressure break side opening now, can cause materials such as oil, gas, water can enter sleeve pipe too early by the pressure break side opening, fracturing string can not use as the ordinary production tubing string, has reduced the oil gas well capacity.

Summary of the invention

For solving the problems of the technologies described above, the utility model provides a kind of novel pressure break sliding sleeve assembly of closing, and can realize selectively opening or closing the pressure break side opening, can carry out well stimulations such as separate stratum fracfturing transformation, seperated layer water injection; After construction operation was finished, fracturing string can be used as the ordinary production tubing string and uses, the well capacity of improving the standard.

The technical solution of the utility model realizes by following measure: a kind of novel pressure break sliding sleeve assembly of closing, and by the sliding sleeve closing tool with can close pressure break sliding sleeve two parts and form.

Described sliding sleeve closing tool comprises top connection, goes up casing, spring block, spring pushing block, piston ring, piston, go up pushing block, crank, telescopic claw, pushing block, casing, ring piece, lower contact, inner bag, spring A, spring B, straight pin A, straight pin B, hook, parts such as straight pin C, spring C down down; The outside, top connection bottom is connected by the TBG tubing round thread with last casing upper inner; Spring block is installed in the space of casing and inner bag formation, and the spring block upper end withstands on the top connection lower end; Spring A upper end is fixedly mounted on the spring block lower end, and spring A lower end is fixedly mounted on spring pushing block upper end; The spring B upper end is fixedly mounted on spring pushing block lower end, and the spring B lower end is fixedly mounted on the pushing block upper end; Piston is installed in the space of piston ring and the formation of last casing; Last pushing block is connected by straight pin A with crank; Crank is connected by straight pin B with telescopic claw; Telescopic claw is connected by straight pin C with following pushing block; The projection in the outside, following pushing block bottom is installed in down in the groove of casing upper inner; Spring C is installed in down in the space of pushing block and the formation of following casing; The lower contact upper outside is connected by the TBG tubing round thread with following casing lower inside; The ring piece is installed in down in the space of casing and inner bag formation;

Described spring A and spring B are in the pretension state;

The described pressure break sliding sleeve of closing comprises parts such as top connection A, sliding sleeve, ball seat, casing, lower contact A; The outside, top connection A bottom is connected by the TBG tubing round thread with the casing upper inner; Lower contact A upper outside is connected by the TBG tubing round thread with the casing lower inside; Ball seat and sliding sleeve are by being threaded; There is projection the sliding sleeve upper end, and projection cooperates with the telescopic claw of sliding sleeve closing tool; Pressure break side opening B is arranged on the casing; Pressure break side opening A is arranged on the sliding sleeve.

The beneficial effects of the utility model are: in the construction of horizontal well in segments pressure break completion, can selectively close fuel-displaced, give vent to anger, serious well section such as water outlet, can carry out well stimulations such as fracturing reform, seperated layer water injection, after construction operation is finished, fracturing string can be used as the ordinary production tubing string and uses, not only improved operating efficiency, and reduced operating cost, improved oil well productivity.

Description of drawings

Accompanying drawing 1 is the sliding sleeve closing tool structural representation of the utility model opening.

Accompanying drawing 2 is the sliding sleeve closing tool structural representation of the utility model closed condition.

Accompanying drawing 3 can be closed pressure break shift sleeve structure schematic diagram for the utility model.

Closed pressure break sliding sleeve assembly structure schematic diagram when accompanying drawing 4 is transferred the sliding sleeve closing tool for the utility model.

Closed pressure break sliding sleeve assembly structure schematic diagram when accompanying drawing 5 is opened the sliding sleeve closing tool for the utility model.

Closed pressure break sliding sleeve assembly structure schematic diagram when accompanying drawing 6 is closed sliding sleeve for the utility model.

Accompanying drawing 7 is the utility model construction the closed pressure break sliding sleeve assembly structure schematic diagram after finishing.

Coding in the accompanying drawing 1 is respectively: 1-top connection, the last casing of 2-, 3-spring block, 4-piston ring, the 5-piston, the last pushing block of 6-, 7-crank, the 8-telescopic claw, pushing block under the 9-, casing under the 10-, 11-encircles piece, 12-lower contact, 13-inner bag, 14-spring A, 15-inlet opening A, 16-spring B, 17-straight pin A, 18-straight pin B, 19-hook, 20-straight pin C, 21-spring C, 22-inlet opening B, 23-top connection A, 24-projection, 25-sliding sleeve, 26-pressure break side opening A, 27-pressure break side opening B, 28-ball seat, 29-spring pushing block, 30-casing, 31-lower contact A.

The specific embodiment

Can determine concrete embodiment according to the technical solution of the utility model and actual conditions, below in conjunction with accompanying drawing the utility model is further described:

As shown in Figure 1, the outside, top connection 1 bottom is connected by the TBG tubing round thread with last casing 2 upper inner; Spring block 3 is installed in the space of casing 2 and inner bag 13 formation, and spring block 3 upper ends withstand on top connection 1 lower end; Spring A14 upper end is fixedly mounted on spring block 3 lower ends, and spring A14 lower end is fixedly mounted on spring pushing block 29 upper ends; Spring B 16 upper ends are fixedly mounted on spring pushing block 29 lower ends, and spring B 16 lower ends are fixedly mounted on pushing block 6 upper ends; Piston 5 is installed in the space of

piston ring

4 and 2 formation of last casing; Last pushing block 6 is connected by straight pin A17 with crank 7; Crank 7 is connected by straight pin B18 with telescopic claw 8; Telescopic claw 8 is connected by straight pin C20 with following pushing block 9; The projection in the outside, following pushing block 9 bottoms is installed in down in the groove of casing 10 upper inner; Spring C21 is installed in down in the space of pushing

block

9 and 10 formation of following casing; Lower contact 12 upper outside are connected by the TBG tubing round thread with following casing 10 lower inside; Ring piece 11 is installed in down in the space of casing 10 and inner bag 13 formation; There is projection 24 sliding sleeve 25 upper ends; Pressure break side opening B27 is arranged on the casing 30; Pressure break side opening A26 is arranged on the sliding sleeve 25.

As shown in Figure 3, the outside, top connection A23 bottom is connected by the TBG tubing round thread with casing 30 upper inner; Lower contact A31 upper outside is connected by the TBG tubing round thread with casing 30 lower inside; Ball seat 28 and sliding sleeve 25 are by being threaded.

The specific implementation process of the utility model most preferred embodiment is as follows:

Go into well front spring A14 and spring B 16 is in the pretension state, the state of crank 7 and telescopic claw 8 as shown in Figure 2.

During on-the-spot the use, need close sliding sleeve with certain production section water outlet is example, known need are closed the Position Approximate of water exit end, transfer to the target location, this moment, sliding sleeve was in opening, two pressure break side opening A26 and pressure break side opening B27 should be corresponding with sliding sleeve upper end projection 24 profiles that will the section of closing over against, the telescopic claw 8 of the sliding sleeve closing tool that is lowered to, as shown in Figure 3 and Figure 4.

Pump into highly pressurised liquid from well head now, the sliding sleeve closing tool is in the highly pressurised liquid, liquid enters the space between casing 2 and the piston ring 4, the inlet opening A15 of liquid by piston 5 tops enters the space between casing 2 and the piston 5, highly pressurised liquid promotes piston 5 and moves downward, piston 5 promotes to go up pushing block 6 downwards, last pushing block 6 downward throw cranks 7, wherein going up pushing block 6 drive spring B 16 moves downward, spring B 16 drives spring pushing block 29 and moves downward, spring pushing block 29 drives spring A14 and moves downward, and spring A14 and spring B 16 are in extended state; Simultaneously liquid enters space between inner bag 13 and the ring piece 11 by inlet opening B22, and highly pressurised liquid promotes down that pushing block 9 moves upward, and following pushing block 9 upwards promotes telescopic claw 8 in compression spring C21.At this moment, crank 7 is subjected to downward motive force, and telescopic claw 8 is subjected to upwards motive force, and crank 7 is around straight pin A17 radial dilatation, and telescopic claw 8 is around straight pin C20 radial dilatation; Simultaneously, under the effect of straight pin B18, crank 7 drives telescopic claw 8 radial dilatation, and hook 19 blocks projection 24, as Fig. 3 and shown in Figure 5.

On carry the sliding sleeve closing tool, hook 19 drives sliding sleeves 25 and moves upward, sliding sleeve 25 is closed pressure break side opening B27, as shown in Figure 6.

Close high-pressure pump this moment, fluid pressure sharply reduces, spring A14 and spring B 16 contractions drive upward, and pushing block 6 moves upward, last pushing block 6 drives crank 7 by straight pin A17 and moves upward, crank 7 is around straight pin A17 radial contraction, under the effect of straight pin B18, crank 7 drives telescopic claw 8 radial contraction, pushing block 9 moved downward under spring C21 shrank and drives simultaneously, following pushing block 9 drives telescopic claw 8 by straight pin C20 and moves downward, telescopic claw 8 is around straight pin C20 radial contraction, the state of crank 7 and telescopic claw 8, as shown in Figure 7.

Claims

1. novel pressure break sliding sleeve assembly of closing is characterized in that: by the sliding sleeve closing tool with can close pressure break sliding sleeve two parts and form; The sliding sleeve closing tool comprises top connection, last casing, spring block, spring pushing block, piston ring, piston, last pushing block, crank, telescopic claw, following pushing block, following casing, ring piece, lower contact, inner bag, spring A, spring B, straight pin A, straight pin B, hook, straight pin C, spring C; The pressure break sliding sleeve be can close and top connection A, sliding sleeve, ball seat, casing, lower contact A comprised; There is projection the sliding sleeve upper end, and projection cooperates with the telescopic claw of sliding sleeve closing tool.

2. the novel pressure break sliding sleeve assembly of closing according to claim 1 is characterized in that: be connected by the TBG tubing round thread with last casing upper inner outside the sliding sleeve closing tool top connection bottom; Spring block is installed in the space of casing and inner bag formation, and the spring block upper end withstands on the top connection lower end.

3. the novel pressure break sliding sleeve assembly of closing according to claim 1 is characterized in that: spring A upper end is fixedly mounted on the spring block lower end, and spring A lower end is fixedly mounted on spring pushing block upper end; The spring B upper end is fixedly mounted on spring pushing block lower end, and the spring B lower end is fixedly mounted on the pushing block upper end; Piston is installed in the space of piston ring and the formation of last casing.

4. the novel pressure break sliding sleeve assembly of closing according to claim 1 is characterized in that: go up pushing block and be connected by straight pin A with crank; Crank is connected by straight pin B with telescopic claw; Telescopic claw is connected by straight pin C with following pushing block; The projection in the outside, following pushing block bottom is installed in down in the groove of casing upper inner; Spring C is installed in down in the space of pushing block and the formation of following casing.

5. the novel pressure break sliding sleeve assembly of closing according to claim 1, it is characterized in that: the lower contact upper outside is connected by the TBG tubing round thread with following casing lower inside; The ring piece is installed in down in the space of casing and inner bag formation.

6. the novel pressure break sliding sleeve assembly of closing according to claim 1, it is characterized in that: spring A and spring B are in the pretension state.

7. the novel pressure break sliding sleeve assembly of closing according to claim 1 is characterized in that: can close the outside, pressure break sliding sleeve top connection A bottom and be connected by the TBG tubing round thread with the casing upper inner; Lower contact A upper outside is connected by the TBG tubing round thread with the casing lower inside; Ball seat and sliding sleeve are by being threaded; Pressure break side opening B is arranged on the casing; Pressure break side opening A is arranged on the sliding sleeve.