Deep coal seam ultrasonic fixed-point blockage removing and permeability increasing integrated equipment

Abstract

The utility model provides ultrasonic fixed-point blockage removal and permeability improvement integrated equipment for a deep coal seam, and belongs to the technical field of blockage removal of a coal seam gas reservoir. Comprising a shell and an ultrasonic transducer arranged in the shell, the ultrasonic transducer is connected with an ultrasonic generator through a cable, the ultrasonic generator is arranged outside a well, a through hole is formed in the position, at the ultrasonic transducer, of the side wall of the shell, and a plurality of supports are arranged on the side wall of the shell in a circumferential array mode; one end of each support is rotationally arranged on the side wall of the shell, a mounting base is arranged at the other end of each support, a roller is rotationally arranged on each mounting base, a plurality of notches allowing the supports to penetrate through are formed in the side wall of the shell, a first driving part used for driving the supports to rotate is arranged on the shell, and a second driving part used for driving the rollers to rotate is arranged on each mounting base. A plugging device used for plugging the sleeve is arranged at the end, away from the lifting rope, of the shell. The method has the effect of improving coal bed gas collection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal bed gas reservoir plugging technology field especially relates to a kind of deep coal bed ultrasonic fixed point plugging permeability integrated equipment. BACKGROUND

[0002] China's coal bed gas resources are rich, and the development prospect is very broad. Deep coal bed contains a large amount of coal bed gas, and in the exploitation process, it is necessary to select site drilling to extend into deep coal bed, and in the drilling process, it is necessary to lay casing section by section and make multiple casings form an integral whole. Then the perforating gun is transported into the casing, and a hole is drilled in the casing and the target coal bed to form multiple perforation tunnels in the coal bed. After drilling is completed, the perforating gun is removed, and hydraulic fracturing can be carried out. High-pressure fracturing fluid is injected into the casing, which can enter the perforation tunnel. This process can produce cracks in the coal bed, and particles in the fracturing fluid can enter the cracks and support the cracks. During construction, holes can be drilled at multiple locations in the casing and coal bed according to process requirements to speed up the collection efficiency of coal bed gas.

[0003] During the exploitation process, coal dust and other impurities in the coal bed cracks can easily enter the casing and form scale on the inner wall of the casing, thereby affecting the exploitation efficiency of coal bed gas. Therefore, it is necessary to provide a deep coal bed ultrasonic fixed point plugging permeability integrated equipment. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a deep coal bed ultrasonic fixed point plugging permeability integrated equipment.

[0005] In order to achieve the above invention purpose, the utility model adopts the following technical solutions:

[0006] A deep coal bed ultrasonic fixed point plugging permeability integrated equipment is provided, which is installed on the lifting rope of a lifting device. The equipment includes a housing and an ultrasonic transducer disposed in the housing. The ultrasonic transducer is connected to an ultrasonic generator via a cable. The ultrasonic generator is disposed outside the well. A through hole is formed in the side wall of the housing at the position of the ultrasonic transducer. A plurality of brackets are arranged in a circular array on the side wall of the housing. One end of each bracket is rotatably disposed on the side wall of the housing. The other end of each bracket is provided with a mounting seat. A roller is rotatably disposed on the mounting seat. A plurality of notches are formed in the side wall of the housing for the brackets to pass through. A first driving member is provided on the housing to drive the plurality of brackets to rotate. A second driving member is provided on the mounting seat to drive the roller to rotate. A plugging device is provided at the end of the housing away from the lifting rope to plug the casing.

[0007] Further, the first driving member comprises a transmission connection electric push rod and a slide column, and an elastic member for driving the support to rotate and moving the active end into the inside of the shell is arranged on the inside wall of the shell at each gap, the slide column is coaxially arranged in the shell, and one side of the support is provided with an inclined surface for sliding contact with the end of the slide column, and the slide column moving abutting the inclined surface can drive the support to rotate and overcome the elastic force of the elastic member to make the roller contact the inside wall of the sleeve.

[0008] Further, the elastic member comprises a torsion spring, the torsion spring is sleeved on the rotating shaft of the support, and the two ends of the torsion spring are connected with the inside wall of the shell and the support respectively.

[0009] Further, a damping spring shock absorber is connected between the support and the mounting seat.

[0010] Further, the sealing device comprises a flexible sleeve, a plurality of metal elastic sheets for supporting the flexible sleeve are arranged on the inner circumference of the flexible sleeve, the flexible sleeve is arranged at one end of the shell away from the hanging rope, a pressing plate for extruding the end of the flexible sleeve to expand the flexible sleeve to seal the sleeve is movably arranged on the shell along the axial direction of the shell, and a third driving member for driving the pressing plate to move is arranged on the shell.

[0011] Further, the flexible sleeve is made of rubber material.

[0012] The beneficial effects of the utility model are as follows: the staff can hoist and lower the device into the sleeve in the shaft, the first driving member can drive the support to rotate and make the roller contact the inside wall of the sleeve, when the shell is blocked during moving downward, the second driving member drives the roller to rotate, the shell can move and pass through the position where dirt accumulates in the sleeve, then the sealing device can seal the pipeline of the sleeve, after sealing, the staff can inject cleaning water into the sleeve, start the ultrasonic generator, and make the ultrasonic transducer work to ultrasonically clean the dirt in the sleeve, after cleaning, the dirt on the inner wall of the sleeve can be vibrated and dropped into the cleaning liquid, and the staff can pump out the cleaning liquid and the dirt, and the coal bed gas collection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of a deep coal bed ultrasonic fixed-point plug removal and permeability improvement integrated equipment.

[0014] Figure 2 It is an inside structure schematic view of a deep coal bed ultrasonic fixed-point plug removal and permeability improvement integrated equipment.

[0015] Figure 3 It is Figure 2 It is a partial enlarged schematic view of part A.

[0016] Wherein, 1, the shell; 11, notch; 12, through hole; 2, ultrasonic transducer; 3, support; 31, inclined plane; 4, mounting seat; 5, roller; 6, first driving element; 61, electric push rod; 62, slide column; 7, second driving element; 8, plugging device; 81, flexible sleeve; 82, metal spring; 9, elastic element; 10, damping spring shock absorber; 20, pressing plate; 30, third driving element. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the description of the drawings and specific embodiments.

[0018] The embodiment of the application discloses a deep coal seam ultrasonic fixed-point plug removal and permeability improvement integrated equipment, referring to Figure 1 、 Figure 2 and Figure 3 , comprising a shell 1 and an ultrasonic transducer 2 arranged in the shell 1, the ultrasonic transducer 2 is connected with an ultrasonic generator (not shown in the figure) through a cable, the ultrasonic generator is arranged outside the well, a through hole 12 is formed in the position of the ultrasonic transducer 2 on the side wall of the shell 1. A plurality of supports 3 are arranged in a circumferential array on the side wall of the shell 1, one end of the support 3 is rotatably arranged on the side wall of the shell 1, the other end of the support 3 is connected with a mounting seat 4, a roller 5 is rotatably arranged on the mounting seat 4, a plurality of notches 11 for the support 3 to pass through are formed in the side wall of the shell 1. The first driving element 6 for driving the plurality of supports 3 to rotate is arranged on the shell 1, the second driving element 7 for driving the roller 5 to rotate is arranged on the mounting seat 4, the plugging device 8 for plugging the casing is arranged at the end of the shell 1 away from the hanging rope.

[0019] In the embodiment of the application, the device can be hung and lowered into the casing in the well, the first driving element 6 can drive the support 3 to rotate and make the roller 5 contact the inner side wall of the casing. When the shell 1 is blocked from moving downward, the second driving element 7 drives the roller 5 to rotate, which can ensure that the shell 1 can move and pass through the position where dirt accumulates in the casing, and then the plugging device 8 can plug the pipeline of the casing. After plugging is completed, clean water can be injected into the casing, and the ultrasonic generator is started, so that the ultrasonic transducer 2 works to ultrasonically clean the dirt in the casing. After cleaning, the dirt on the inner wall of the casing can be vibrated and fall off and mixed in the cleaning liquid, and the worker can pump out the cleaning liquid and dirt. During the cleaning process, since the plugging device 8 has plugged the pipeline in the casing, the cleaning liquid will only flow from the wellhead to the plugging device 8 and will not flow into the pipeline behind the casing. The deep coal seam ultrasonic fixed-point plug removal and permeability improvement integrated equipment of the application can clean the dirt inside the casing, so as to achieve the purpose of plug removal and permeability improvement, and has the effect of improving the efficiency of coalbed methane collection.

[0020] Specifically, the first driving member 6 comprises a transmission connection electric push rod 61 and a slide column 62, and the inner side wall of the shell 1 is provided with an elastic member 9 at each notch 11 for driving the bracket 3 to rotate and move the movable end into the shell 1. The slide column 62 is coaxially and slidingly arranged in the shell 1, and one side of the bracket 3 is provided with an inclined surface 31 for sliding contact with the end of the slide column 62. The slide column 62 moves to abut the inclined surface 31 to drive the bracket 3 to rotate and overcome the elastic force of the elastic member 9 to make the roller 5 contact the inner side wall of the sleeve.

[0021] In the embodiment of the present application, the electric push rod 61 can drive the slide column 62 to move and enable the bracket 3 to rotate against the elastic force of the elastic member 9 until the roller 5 can contact the inner side wall of the sleeve.

[0022] The second driving member 7 comprises a driving motor, which is arranged on the mounting seat 4, and the output shaft of the driving motor is in transmission connection with the roller 5.

[0023] Specifically, the elastic member 9 comprises a torsion spring, which is sleeved on the rotating shaft of the bracket 3 and has two ends connected with the inner side wall of the shell 1 and the bracket 3, respectively.

[0024] In the embodiment of the present application, after the slide column 62 moves and releases the bracket 3, the torsion spring can drive the bracket 3 to rotate and move the movable end into the shell 1.

[0025] Further, the bracket 3 is connected with the mounting seat 4 through a damping spring shock absorber 10.

[0026] Because dirt accumulates on the inner side wall of the sleeve, the inner side wall of the pipe section becomes uneven. When the roller 5 rolls on the inner side wall of the sleeve to transport the shell 1, the damping spring shock absorber 10 can dampen the shell 1 and the internal accessories.

[0027] Specifically, the plugging device 8 comprises a flexible sleeve 81, and a plurality of metal spring sheets 82 for supporting the flexible sleeve 81 are arranged on the inner circumference of the flexible sleeve 81. The flexible sleeve 81 is arranged at one end of the shell 1 away from the lifting rope, and a pressing plate 20 for extruding the end of the flexible sleeve 81 to expand the flexible sleeve 81 to plug the sleeve is movably arranged on the shell 1 along the axis of the shell 1, and a third driving member 30 for driving the pressing plate 20 to move is arranged on the shell 1.

[0028] In the embodiment of the present application, the third driving member 30 is another electric push rod 61, which is arranged in the shell 1 and has a movable end screw-connected with the pressing plate 20. The third driving member 30 can drive the pressing plate 20 to move to extrude the end of the flexible sleeve 81 and make the metal spring sheet 82 bend, so that the flexible sleeve 81 can expand to plug the pipeline in the sleeve.

[0029] Specifically, the flexible sleeve 81 is made of rubber material.

[0030] The implementation principle of the deep coal seam ultrasonic fixed-point plug removal and permeability improvement integrated equipment is as follows: the staff can hoist and lower the device into the casing of the shaft, the first driving member 6 can drive the support 3 to rotate and make the roller 5 contact the inner sidewall of the casing. When the shell 1 is blocked during downward movement, the second driving member 7 drives the roller 5 to rotate, so that the shell 1 can move through the position where dirt accumulates in the casing, and then the plugging device 8 can be used to plug the pipeline of the casing. After the plugging is completed, the cleaning water can be injected into the casing, the ultrasonic generator is started, the ultrasonic transducer 2 can work, and the dirt in the casing can be cleaned by ultrasonic waves. After cleaning, the dirt on the inner wall of the casing can be vibrated and fall off and mixed in the cleaning liquid, and the staff can use the water pump to pump out the cleaning liquid and dirt. The deep coal seam ultrasonic fixed-point plug removal and permeability improvement integrated equipment can clean the dirt in the casing, so as to achieve the purpose of plug removal and permeability improvement, and has the effect of improving the coal seam gas collection efficiency.

[0031] Those skilled in the art will appreciate that although preferred embodiments of the present application have been described, those skilled in the art, once aware of the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application. Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and changes.

Claims

1. A deep coal seam ultrasonic spot deplugging and permeability improvement integrated equipment for being installed on a hoisting rope of a hoisting device, characterized in that: The utility model provides an ultrasonic logging tool, which comprises a shell (1) and an ultrasonic transducer (2) arranged in the shell (1), the ultrasonic transducer (2) is connected with an ultrasonic generator through a cable, the ultrasonic generator is arranged outside a well, a through hole (12) is formed in the side wall of the shell (1) at the position of the ultrasonic transducer (2), a plurality of brackets (3) are arranged in a circumferential array on the side wall of the shell (1), one end of the bracket (3) is rotatably arranged on the side wall of the shell (1), the other end of the bracket (3) is provided with a mounting seat (4), a roller (5) is rotatably arranged on the mounting seat (4), a plurality of notches (11) for the bracket (3) to pass through are formed in the side wall of the shell (1), the shell (1) is provided with a first driving member (6) for driving the plurality of brackets (3) to rotate, the mounting seat (4) is provided with a second driving member (7) for driving the roller (5) to rotate, and the end of the shell (1) away from a hanging rope is provided with a plugging device (8) for plugging a casing.

2. The deep coal seam ultrasonic spot plugging and permeability improvement integrated equipment according to claim 1, characterized in that: The first driving member (6) comprises a transmission-connected electric push rod (61) and a slide column (62), an elastic member (9) for driving the bracket (3) to rotate and moving the active end of the bracket (3) into the shell (1) is arranged on the inner side wall of the shell (1) at each notch (11), the slide column (62) is coaxially and slidingly arranged in the shell (1), one side of the bracket (3) is provided with an inclined surface (31) for sliding contact with the end of the slide column (62), and the slide column (62) moving and abutting against the inclined surface (31) can drive the bracket (3) to rotate and overcome the elastic force of the elastic member (9) to make the roller (5) contact the inner side wall of the casing.

3. The deep coal seam ultrasonic spot plugging and permeability improvement integrated equipment according to claim 2, characterized in that: The elastic member (9) comprises a torsional spring, the torsional spring is sleeved on the rotating shaft of the bracket (3), and the two ends of the torsional spring are connected with the inner side wall of the shell (1) and the bracket (3) respectively.

4. The deep coal seam ultrasonic spot plugging and permeability improvement integrated equipment according to claim 2, characterized in that: A damping spring shock absorber (10) is connected between the bracket (3) and the mounting seat (4).

5. The deep coal seam ultrasonic spot plugging and permeability improvement integrated equipment according to claim 2, characterized in that: The plugging device (8) comprises a flexible sleeve (81), a plurality of metal spring sheets (82) for supporting the flexible sleeve (81) are arranged in a circumferential array in the flexible sleeve (81), the flexible sleeve (81) is arranged at the end of the shell (1) away from the hanging rope, a pressing plate (20) for extruding the end of the flexible sleeve (81) to make the flexible sleeve (81) expand to plug the casing is movably arranged on the shell (1) along the axis of the shell (1), and the shell (1) is provided with a third driving member (30) for driving the pressing plate (20) to move.

6. The deep coal seam ultrasonic spot plugging and permeability improvement integrated equipment according to claim 5, characterized in that: The flexible sleeve (81) is made of rubber material.

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