阅读说明：本技术 一种可复用式的瓦斯钻孔两堵一注一体式坐封封隔器 (Reusable gas drilling two-plugging one-injection integrated setting packer ) 是由 程健维 王钰 吴宇辰 吴雨航 梅境 田松杰 罗望 关品品 郑欣睿 张蕊 王最 于 2020-11-23 设计创作，主要内容包括：本发明公开了一种可复用式的瓦斯钻孔两堵一注一体式坐封封隔器,包括套接在瓦斯管外部的硬质支撑杆,硬质支撑杆的尾端套设有密封囊袋,硬质支撑杆内设置有注水管以及注浆管,注浆管的末端通过非凝浆液注浆口与瓦斯钻孔的内腔连通,注水管的末端通过孔底囊袋进液口与密封囊袋连通,硬质支撑杆的前端套设有密封橡胶,注水管通过密封机构进液口与密封橡胶连通,密封橡胶的两侧对应设置有环形体,环形体的外侧依次对应设置有锥形体、防突环、卡瓦、液压缸,液压缸的进液口与注水管连通,可以实现双重密封,密封效果更好,而且可以在泄压后进行反复使用,解决了原先囊袋膨胀不足,难以回收的问题,是对其系统中的可复用式设备一次全新探索。(The invention discloses a reusable two-plug one-injection integral setting packer for a gas drilling hole, which comprises a hard supporting rod sleeved outside a gas pipe, wherein a sealing bag is sleeved at the tail end of the hard supporting rod, a water injection pipe and a grouting pipe are arranged in the hard supporting rod, the tail end of the grouting pipe is communicated with an inner cavity of the gas drilling hole through a non-coagulation slurry grouting port, the tail end of the water injection pipe is communicated with the sealing bag through a liquid inlet of a bag at the bottom of the hole, sealing rubber is sleeved at the front end of the hard supporting rod, the water injection pipe is communicated with the sealing rubber through a liquid inlet of a sealing mechanism, annular bodies are correspondingly arranged at two sides of the sealing rubber, a conical body, an anti-bulge ring, a slip and a hydraulic cylinder are correspondingly arranged outside the annular bodies in sequence, the liquid inlet of the hydraulic cylinder is communicated with the water injection pipe, double sealing can be realized, the sealing, the problem of difficult recovery is a brand new exploration for the reusable equipment in the system.)

1. The utility model provides a two stifled one notes integral type of gas drilling that can multiplex seal packer which characterized in that: the gas pipe drilling tool comprises a hard support rod (17) sleeved outside a gas pipe (1), wherein a sealing bag (15) is sleeved at the tail end of the hard support rod (17), hard plugs (18) sleeved outside the hard support rod (17) and the gas pipe (1) and used for axially fixing the sealing bag (15) are arranged at two ends of the sealing bag (15), a water injection pipe and a grouting pipe are arranged in the hard support rod (17), the tail end of the grouting pipe is communicated with an inner cavity of a gas drilling hole through a non-coagulation liquid injection port (14), the tail end of the water injection pipe is communicated with the sealing bag (15) through a hole bottom bag liquid inlet (16), sealing rubber (12) is sleeved at the front end of the hard support rod (17), the water injection pipe is communicated with the sealing rubber (12) through a sealing mechanism liquid inlet (13), annular bodies (11) are correspondingly arranged on two sides of the sealing rubber (12), the outside of ring body (11) corresponds in proper order and is provided with conical body (10), the abrupt ring of preventing (9) that corresponds with conical body (10), slips (7) that correspond with the abrupt ring of preventing (9), pneumatic cylinder (6) of being connected with slips (7), the inlet and the water injection pipe intercommunication of pneumatic cylinder (6), be provided with system limit valve (5) that are used for the shutoff water injection pipe on the water injection pipe, the inboard correspondence of slips (7) is provided with reset spring (8).

2. The reusable gas drilling two-plug one-shot integrated setting packer as recited in claim 1, characterized in that: the tail end of the gas pipe (1) is provided with a floral tube (19).

3. The reusable gas drilling two-plug one-shot integrated setting packer as recited in claim 1, characterized in that: the tip of water injection pipe is formed with water filling port (2), system limiting valve (5) are close to water filling port (2) end setting.

4. The reusable gas drilling two-plug one-shot integrated setting packer as recited in claim 1, characterized in that: the end part of the grouting pipe is provided with a tee joint (4), the front end of a straight pipe section of the tee joint (4) is communicated with the grouting pipe on the front side, the rear end of the straight pipe section is communicated with the grouting pipe on the rear side, a grouting opening (3) is formed in the end part of the grouting pipe on the front side, and an upper pipe section of the tee joint (4) is communicated with a pressure gauge.

5. The reusable gas drilling two-plug one-shot integrated setting packer as recited in claim 1, characterized in that: taper pipe parts corresponding to the taper bodies (10) are formed on the anti-protrusion ring (9) and the slips (7).

6. The reusable gas drilling two-plug one-shot integrated setting packer as recited in claim 1, characterized in that: the inside of the slip (7) is provided with a clamping groove which is axially arranged and corresponds to the return spring (8), and the return spring (8) is arranged corresponding to the small end of the annular body (11).

7. The reusable gas drilling two-plug one-shot integrated setting packer as recited in claim 1, characterized in that: the head-on of the system limiting valve (5) is in a slope type.

Technical Field

The invention relates to gas extraction drilling hole plugging equipment, in particular to a reusable gas drilling hole two-plugging one-injection integrated setting packer.

Background

The traditional hole sealing method adopts a gas sealing concept, namely gas is sealed by solid, so that the problem of plugging of a new crack is difficult to solve, and the problem that the new crack is difficult to plug in the gas extraction process is effectively solved by using non-solidified green slurry of the gas sealing concept to realize dynamic plugging of the gas extraction drill crack, so that the gas extraction effect can be obviously improved. However, the new plugging method has the problems of imperfect plugging system and lack of matched equipment and experience in use. The existing widely applied 'two-plug one-injection' equipment has the defects of high failure rate and no reusability; although reusable hole sealing equipment is developed, a simple water injection expansion bag method is mostly used, and the problems of insufficient expansion and difficult recovery exist in practical application.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a reusable gas drilling two-plugging one-injection integrated setting packer.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a reusable two-plug one-injection integrated setting packer for gas drilling, which comprises a hard support rod sleeved outside a gas pipe, wherein a sealing bag is sleeved at the tail end of the hard support rod, hard plugs sleeved outside the hard support rod and the gas pipe and used for axially fixing the sealing bag are arranged at two ends of the sealing bag, a water injection pipe and a grouting pipe are arranged in the hard support rod, the tail end of the grouting pipe is communicated with an inner cavity of the gas drilling through a non-setting slurry grouting port, the tail end of the water injection pipe is communicated with the sealing bag through a hole bottom bag liquid inlet, sealing rubber is sleeved at the front end of the hard support rod, the water injection pipe is communicated with the sealing rubber through a liquid inlet of a sealing mechanism, annular bodies are correspondingly arranged at two sides of the sealing rubber, and a conical body are correspondingly arranged outside the annular bodies in sequence, Prevent protruding ring, slips that corresponds with preventing protruding ring, be connected with the slips that prevents protruding ring, the inlet and the water injection pipe intercommunication of pneumatic cylinder, be provided with the system limit valve that is used for the shutoff water injection pipe on the water injection pipe, the inboard correspondence of slips is provided with reset spring, the tip of slip casting pipe is provided with the tee bend.

Preferably, the end of the gas pipe is formed with a perforated pipe for better gas collection.

Preferably, the tip of water injection pipe is formed with the water filling port, the limit valve of system is close to water filling port end setting, through the water filling port to the water injection pipe water injection, and the shutoff water injection pipe that the limit valve of system can be better in order to realize the seat of equipment to seal in the feeder, and can carry out the pressure release when the deblocking.

Preferably, the tip of slip casting pipe is provided with the tee bend, the front end of the straight tube section of tee bend and the slip casting pipe intercommunication of front side, the rear end of straight tube section and the slip casting pipe intercommunication of rear side, the slip casting pipe tip of front side is formed with the slip casting mouth, tee bend top tube section intercommunication has the manometer, and the manometer that sets up that tee bend structure can be better, through the observation slip casting pressure that the manometer can be better, the slip casting mouth adopts the screw plug sealed, closes when not needing the slip casting, when needing the slip casting, opens the end cap, utilize automatic slip casting to mend the thick liquid equipment injection thick liquid can.

Preferably, the anti-protrusion ring and the slip are provided with taper pipe parts corresponding to the conical body, so that the slip can move along the conical surface of the conical body to extrude the anti-protrusion ring conveniently.

Preferably, the slips inboard is formed with the joint recess that the axial that corresponds with reset spring set up, reset spring corresponds the setting with the tip of ring body, and reset spring and joint recess inner wall welding make things convenient for after the pressure release, push away the original position through reset spring with the slips.

Preferably, the head-on of the system limiting valve is of a slope type, the system limiting valve can be opened by adopting a slender rod-shaped object, and pressure relief is easy to carry out for reuse after extraction is completed.

The invention has the beneficial effects that: the invention has simple structure, can realize double sealing, has better sealing effect, can be repeatedly used after pressure relief, solves the problems of insufficient expansion and difficult recovery of the original bag, is a brand new exploration for reusable equipment in the system, and when in specific use, the integrated sealing bag is put to a proper position of a drill hole to connect high-pressure water to a water filling port, and the water firstly expands the sealing bag through a liquid inlet of the bag at the bottom of the hole so as to finish the advanced plugging of the bag at the bottom; through the change of the liquid pressure in the device, after the bottom bag completes the fixed and stable preliminary plugging, the water pressure in the device is gradually increased, the hydraulic cylinder piston is pushed, and simultaneously, the slips are driven to obliquely move along the conical body until being clamped on the hole wall, the anti-protruding ring is extruded and expanded by the slips, a drill hole is plugged, and the secondary plugging based on the setting principle is started; through the change of liquid pressure in the device, after the setting is preliminarily finished, the water pressure is gradually increased to reach the threshold value of a bursting valve of a liquid inlet of the sealing mechanism, water flow enters the sealing rubber mechanism and expands the sealing rubber mechanism, finally, a limiting valve of a system is pushed under the action of the water pressure to plug a water injection pipe, the configured non-setting slurry is injected through a slurry injection port when the grouting in the plugging process is finished, after the proper pressure is reached, the tee joint is screwed down, the grouting work is finished, and the automatic slurry injection and supplement equipment is used for supplementing slurry when the slurry is needed; during the deblocking, the use tool restores the spacing valve manual work of system, and the pressure release is released water, and the inside reset spring effect of slips makes the slips remove to get back to original position, extracts the bag at last and can carry out next hole sealing operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a setting mechanism of the present invention;

FIG. 3 is a schematic view of the setting state of the present invention;

FIG. 4 is a schematic structural view of a setting mechanism in a setting state according to the present invention;

FIG. 5 is a schematic representation of the relationship of expansion volume and fit force of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment provides a reusable two-plug one-injection integrated setting packer for gas drilling, which comprises a hard support rod 17 sleeved outside a gas pipe 1, wherein a sealing bag 15 is sleeved at the tail end of the hard support rod 17, hard plugs 18 sleeved outside the hard support rod 17 and the gas pipe 1 and used for axially fixing the sealing bag 15 are arranged at two ends of the sealing bag 15, a water injection pipe and a grouting pipe are arranged in the hard support rod 17, the tail end of the grouting pipe is communicated with an inner cavity of the gas drilling through a non-coagulated slurry grouting port 14, the tail end of the water injection pipe is communicated with the sealing bag 15 through a hole bottom bag liquid inlet 16, sealing rubber 12 is sleeved at the front end of the hard support rod 17, the water injection pipe is communicated with the sealing rubber 12 through a sealing mechanism liquid inlet 13, annular bodies 11 are correspondingly arranged at two sides of the sealing rubber 12, the outside of ring body 11 corresponds in proper order and is provided with conical body 10, the abrupt ring 9 of preventing that corresponds with conical body 10, slips 7 that corresponds with preventing abrupt ring 9, the pneumatic cylinder 6 of being connected with slips 7, the inlet and the water injection pipe intercommunication of pneumatic cylinder 6, be provided with the system stop valve 5 that is used for the shutoff water injection pipe on the water injection pipe, the inboard correspondence of slips 7 is provided with reset spring 8, the tip of slip casting pipe is provided with tee bend 4. The tail end of the gas pipe 1 is provided with a perforated pipe 19, so that gas can be collected better. The tip of water injection pipe is formed with water filling port 2, system limit valve 5 is close to 2 end settings of water filling port, through 2 water injection to the water injection pipe water injection of water filling port, and the seat that pressure in order to realize equipment in the donator seals, shutoff water injection pipe that system limit valve 5 can be better, and can carry out the pressure release when the deblocking. The tip of slip casting pipe is provided with tee bend 4, the front end of tee bend 4 straight tube section and the slip casting pipe intercommunication of front side, the rear end of straight tube section and the slip casting pipe intercommunication of rear side, the slip casting pipe tip of front side is formed with slip casting mouth 3, tee bend 4's last tube section intercommunication has the manometer, and tee bend structure's setting can be better sets up the manometer, through the observation slip casting pressure that the manometer can be better, and slip casting mouth 3 adopts the screw plug sealed, closes when not needing the slip casting, when needing the slip casting, opens the end cap, and it can to utilize automatic slip casting to mend the thick liquid injection of thick liquid equipment. The anti-protruding ring 9 and the slip 7 are provided with taper pipe parts corresponding to the conical body 10, so that the slip 7 can move along the conical surface of the conical body to extrude the anti-protruding ring 9. The slips 7 inboard is formed with the joint recess of the axial setting that corresponds with reset spring 8, reset spring 8 corresponds the setting with the tip of annular body 11, and reset spring 8 and joint recess inner wall welding make things convenient for after the pressure release, push away slips 7 original position through reset spring 8. The head-on of the system limiting valve 5 is in a slope type, the system limiting valve 5 can be opened by adopting a slender rod-shaped object, and pressure relief is easy to carry out and reuse after extraction is finished.

As shown in fig. 1-4, in specific use, after gas drilling and pore forming, the integrated sealing bag 15 is put to a proper position of a drilled hole according to the original process, high-pressure water is connected to the water injection port 2, the water firstly expands the sealing bag 15 through the liquid inlet 16 of the bag at the bottom of the hole to complete the advanced plugging of the bag at the bottom, and the water pressure does not reach the working water pressure of the hole opening setting mechanism; the water pressure in the device is gradually increased, the piston of the hydraulic cylinder 6 is pushed, and meanwhile, the slips 7 are driven to obliquely move along the conical body 10 until the slips are tightly clamped on the hole wall, the anti-protruding ring is extruded and expanded by the slips, and a drilled hole is plugged; after the water pressure gradually increases and reaches the threshold value of a bursting valve of a liquid inlet 13 of the sealing mechanism, water flow enters a sealing rubber mechanism 12 and expands the sealing rubber mechanism, and finally a limiting valve 5 of a pushing system is pushed to plug a water injection pipe under the action of the water pressure to finish the plugging process; and during grouting, injecting the prepared non-setting slurry through the grouting opening 14, observing grouting pressure on the tee joint 4, and closing a plug on the tee joint 4 after the proper pressure is reached to finish the grouting work. When the automatic grouting and slurry supplementing equipment is used for slurry supplementing, the plug on the tee joint 4 is unscrewed, and slurry is injected; during the deblocking, use the instrument with system limit valve 5 manual recovery, the pressure release drains, slips 7 inside reset spring 8 effect makes slips 7 remove to get back to original position, extracts the bag at last and can carry out next hole sealing operation.

As shown in fig. 5, the relationship between the expansion volume of the hole packer and the engagement force is obtained through a simulation experiment, and since the engagement force between the expansion rubber layer and the hole wall cannot be directly measured, but the engagement force is in direct proportion to the friction force between the expansion rubber layer and the hole wall, the engagement force formula can be obtained through measuring the friction force: f is uN; n is the engagement force, f is the friction force, and u is the coefficient of friction.

The invention has simple structure, can realize double sealing, has better sealing effect, can be repeatedly used after pressure relief, solves the problems of insufficient expansion and difficult recovery of the original bag, and is a brand new exploration for reusable equipment in the system.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.