CN115012880A - Coal-bed gas well fracturing sand pumping device and method for replacing drilling sand cover without replacing - Google Patents
Coal-bed gas well fracturing sand pumping device and method for replacing drilling sand cover without replacing Download PDFInfo
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- CN115012880A CN115012880A CN202210849474.8A CN202210849474A CN115012880A CN 115012880 A CN115012880 A CN 115012880A CN 202210849474 A CN202210849474 A CN 202210849474A CN 115012880 A CN115012880 A CN 115012880A
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- 239000004576 sand Substances 0.000 title claims abstract description 101
- 238000005086 pumping Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005553 drilling Methods 0.000 title claims abstract description 12
- 230000006835 compression Effects 0.000 claims abstract description 22
- 238000007906 compression Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 20
- 239000003245 coal Substances 0.000 claims abstract description 14
- 239000003129 oil well Substances 0.000 claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 56
- 238000003466 welding Methods 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to an oil extraction auxiliary tool, in particular to a coal bed gas well fracturing sand pumping device and a method for replacing a drilling sand cover without replacing. The plunger (6) moves upwards to suck the sand cover drilled by the scraper drill bit (25) and fracturing sand into the working cavity (8) to finish the oil absorption process; plunger (6) lapse, working chamber (8) volume reduces, and compression spring II (12) are pushing up II (13) lapse of annular valve, close the check valve of working chamber (8) lower extreme, and working chamber (8) internal pressure increase this moment makes I (7) rebound of annular valve, opens the check valve of sucker rod (3) lower extreme, discharges sand lid and fracturing sand in oil pipe (1), accomplishes the oil extraction process. The scraper drill bit (25) can only rotate in the same direction, namely the sand cover is drilled by the scraper drill bit (25), and the oil well pump can continuously recover oil.
Description
Technical Field
The invention relates to an oil extraction auxiliary tool, in particular to a coal bed gas well fracturing sand pumping device and a method for replacing a drilling sand cover without replacing.
Background
After the fracturing operation task is completed, a great amount of fracturing sand is accumulated at the bottom of the well, so that the oil well pump is required to pump the redundant fracturing sand out of the bottom of the well, however, the fracturing sand contains fracturing fluid, sand, gel and the like, and due to the gel effect, the fracturing sand is easy to coagulate to form a sand cover, so that the oil well pump cannot complete the pumping operation.
In a common oil field well, because the stratum is deep and the bottom pressure is high, the fracturing sand can be flushed away by the sand cover formed by gel by utilizing the bottom pressure, and therefore, the fracturing sand can be pumped out from the bottom by utilizing an oil well pump; however, in the coal-bed gas well, because the stratum is shallow and the bottom hole pressure is low, the fracturing sand cannot be flushed away by the bottom hole pressure due to a sand cover formed by gel, and therefore, the oil well pump cannot complete pumping operation.
A tool is therefore required to drill the sand cap at the bottom of the well and then pump the excess frac sand out of the well by means of a tubing pump. The conventional method is that a well repairing machine is used for placing a drill bit into the bottom of a well, a formed sand cover is drilled completely, then a tubular pump is placed into the bottom of the well to pump out redundant fracturing sand, and the replacement of the drill bit and the tubular pump requires a certain time, and the fracturing sand drilled at the bottom of the well is likely to be condensed again to form a new sand cover within the time of replacing the tubular pump, so that the working efficiency of the fracturing sand-filled well is greatly reduced.
Disclosure of Invention
The purpose of the invention is as follows: in order to provide a more effective pumping device for fracturing sand of a coal-bed gas well and a method for replacing a drilling sand cover without drilling, a plurality of substantial technical effects of a specific implementation part are specifically aimed at.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first scheme comprises the following steps:
a coal bed gas well fracturing sand pumping device is characterized in that,
the bottom of the oil pipe 1 is provided with a sealing pipe external thread, the upper end of the pump body 2 is provided with a sealing pipe internal thread, and the sealing pipe external thread at the bottom of the oil pipe 1 is in fit connection with the sealing pipe internal thread at the upper end of the pump body 2;
the lower end of the pump body 2 is hermetically connected with the upper end of the working cavity 8, the lower end of the working cavity 8 is provided with an annular space, an annular valve II 13 is upwards placed in the annular space from the bottom of the working cavity 8, and a compression spring II 12 is placed in the annular space between the annular valve II 13 and the bottom of the working cavity 8;
the upper end of the flange connecting piece 14 is placed in the working cavity 8, a channel is arranged in the flange connecting piece 14, and a ribbed plate in the middle of the flange connecting piece 14 is hermetically connected with the bottom of the working cavity 8;
the lower end of the ratchet I15 is provided with internal gear teeth, the lower end of the ratchet II 24 is provided with external gear teeth, a curved channel is arranged inside the ratchet II 24, the ratchet II 24 is placed inside the ratchet I15, the internal gear teeth at the lower end of the ratchet I15 are matched and connected with the external gear teeth at the lower end of the ratchet II 24, and the bottom of the ratchet I15 is hermetically connected with the top of the scraper drill 25;
flange end cover 21 and flange joint spare 14 bottom centre place sealed 20 of filling up, flange end cover 21, flange joint spare 14 and sealed 20 bolt 19 and nut 22 fixed connection for filling up, the top of sucker rod 3 is equipped with the toper external screw thread and is used for being connected with the upper end polished rod, sucker rod 3 middle part is equipped with an annular ring, O type sealing washer I4 is placed in the annular ring, play sealing action, sucker rod 3 lower extreme is equipped with an annular space, annular valve I7 upwards places inside the annular space from sucker rod 3 bottom, compression spring I5 places between the annular space of annular valve I7 and sucker rod 3 bottom, 6 lower extremes of plunger are equipped with bent shape post, and 6 upper end's of plunger rib and 3 bottom sealing connection of sucker rod, wherein the bent shape post of 6 lower extremes of plunger is connected with the inside bent shape passageway cooperation of ratchet II 24.
The invention further adopts the technical scheme that a deep groove ball bearing 17 is arranged at the lower end of a gasket I16, a gasket II 18 is arranged at the lower end of the deep groove ball bearing 17, a flange end cover 21 is arranged at the lower end of the gasket II 18, and an oil seal 23 is arranged in the middle of the flange end cover 21 to play a role in sealing.
A further technical solution of the present invention is that the upper end of the channel inside the flange connection 14 is provided with three annular rings.
A further solution of the invention consists in that the dust sealing ring 9 is placed in the first annular ring at the inner upper end of the flange connection 14.
The invention further adopts the technical scheme that the retainer ring 10 for the O-shaped sealing ring and the O-shaped sealing ring II 11 are placed in the second and third annular rings in the flange connecting piece 14 together.
The further technical scheme of the invention is that a cylinder is arranged at the upper end of the drag bit 25, and the top of the cylinder at the upper end of the drag bit 25 is hermetically connected with the bottom of the ratchet I.
The technical scheme is that the upper end of the ratchet wheel I is provided with a protruding round table, a gasket I is arranged at the lower end of the round table, a deep groove ball bearing is arranged at the lower end of the gasket I, a gasket II is arranged at the lower end of the deep groove ball bearing, a flange end cover is arranged at the lower end of the gasket II, an oil seal is arranged in the middle of the flange end cover to play a role in sealing, a sealing gasket is arranged in the middle of the flange end cover and the bottom of the flange connecting piece, and the flange end cover, the flange connecting piece and the sealing gasket are fixedly connected through bolts and nuts.
The further technical scheme of the invention is that the deep groove ball bearing is a deep groove ball bearing with dust covers on two sides; the sealing connection is welding, and the welding mode is full welding.
Scheme II:
a method for pumping fracturing sand of a coal-bed gas well without replacing a drilled sand cover is characterized in that the pumping device is used, and comprises the following steps;
the lower end of a pump body 2 is connected with a working cavity 8, the lower end of the working cavity 8 is connected with a flange connecting piece 14, the lower end of the flange connecting piece 14 is connected with a flange end cover 21, a ratchet II 24 is placed in a ratchet I15, the lower end of the ratchet I15 is connected with a drill bit 25, then the lower end of an oil pipe 1 is connected and placed underground by the oil pipe 1, so that a scraper drill bit 25 is slightly inserted into a sand cover, the lower end of a sucker rod 3 is connected with a compression spring I5, an annular valve I7 and a plunger 6, a dustproof sealing ring 9 between the plunger 6 and the working cavity 8 and an O-shaped sealing ring II 11 play a dustproof sealing role, when a ground pumping unit drives an underground sucker rod 3 and the plunger 6 to perform piston motion, the plunger 6 moves upwards, the volume of the working cavity 8 is increased to form vacuum, the compression spring I5 pushes against the annular valve I7 to move downwards, and a check valve at the lower end of the sucker rod 3 is closed, at the moment, the internal pressure of the working chamber 8 is increased, the annular valve II 13 is moved upwards, the one-way valve at the lower end of the working chamber 8 is opened, and the sand cover drilled by the scraper bit 25 and fracturing sand are sucked into the working chamber 8 to finish the oil absorption process; plunger 6 downstream, 8 volume reductions in working chamber, compression spring II 12 pushes up II 13 downshifts of ring valve, closes the check valve of 8 lower extremes in working chamber, and 8 internal pressure increases in working chamber this moment, makes I7 rebound in the ring valve, opens the check valve of 3 lower extremes in sucker rod, discharges the oil pipe 1 with sand lid and fracturing sand in, accomplishes the oil extraction process.
The further technical scheme of the invention is that when the plunger 6 moves downwards, a curved column at the lower end of the plunger 6 is matched and connected with a curved channel in the ratchet II 24, so that a rotating force is provided for the ratchet II 24, the ratchet II 24 is meshed with the ratchet I15 through gear teeth, and meanwhile, a rotating force is also provided for the ratchet I15, and the ratchet I15 drives the scraper bit 25 to rotate, so that the aim of drilling the sand cover is fulfilled; when the plunger 6 upwards moves, because there is certain clearance between the bent column of plunger 6 lower extreme and II 24 of ratchet, can not drive II 24 of ratchet upward movement, but provide a revolving force opposite with before for II 24 of ratchet, because the characteristic of ratchet, II 24 of ratchet can only carry out reverse rotation motion in I15 of ratchet, can not provide the revolving force for I15 of ratchet, alright accomplish that drag bit 25 can only carry out rotary motion in same direction, accomplished promptly and utilized drag bit 25 to bore the sand cover open, can make the process that the oil-well pump lasts to recover oil.
Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects: the invention is mainly used for solving the problem that fracturing sand is condensed to form a sand cover in the fracturing operation of a coal-bed gas well and cannot be pumped out of the well by using a tubular pump, and simultaneously solving the problem that a scraper drill bit needs to be replaced to drill the sand cover, the lower end of a pump body is connected with a working cavity, the lower end of the working cavity is connected with a flange connecting piece, the lower end of the flange connecting piece is connected with a flange end cover, the upper end inside the flange end cover is connected with a gasket II, a deep groove ball bearing and a gasket I, the upper end of the gasket I is connected with a ratchet I, the ratchet II is placed inside the ratchet I, the lower end of the ratchet I is connected with the drill bit, then the lower end of the oil pipe is connected by using a thread on the pump body and is placed underground through the oil pipe, so that the scraper drill bit is slightly inserted into the sand cover, the lower end of a sucker rod is connected with a compression spring I, a ring valve I and a plunger, and a drum-shaped rubber sealing ring between the plunger and the working cavity play a sealing role, when the ground pumping unit drives the underground sucker rod and the plunger to perform piston motion, the plunger moves upwards, the volume of the working cavity is increased to form vacuum, the compression spring I pushes the annular valve I to move downwards, the one-way valve at the lower end of the sucker rod is closed, the pressure in the working cavity is increased at the moment, the annular valve II moves upwards, the one-way valve at the lower end of the working cavity is opened, the sand cover drilled by the drill bit and fracturing sand are sucked into the working cavity, and the oil absorption process is completed; the plunger moves downwards, the volume of the working cavity is reduced, the compression spring II pushes the annular valve II to move downwards, the one-way valve at the lower end of the working cavity is closed, the pressure in the working cavity is increased, the annular valve I moves upwards, the one-way valve at the lower end of the sucker rod is opened, the sand cover and fracturing sand are discharged into an oil pipe, and the oil discharge process is completed; when the plunger moves downwards, a curved column at the lower end of the plunger is matched and connected with a curved channel in the ratchet II, so that a rotating force is provided for the ratchet II, the ratchet II is meshed with the ratchet I through gear teeth, a rotating force is provided for the ratchet I, and the ratchet I drives the drill bit to rotate, so that the aim of drilling the sand cover is fulfilled; when the plunger moved up, because there is certain clearance between curvy post and the ratchet II of plunger lower extreme, can not drive II upward movements of ratchet, but provide a revolving force opposite with before for ratchet II, because the characteristic of ratchet, ratchet II can only carry out reverse rotation motion in I inside of ratchet, can not provide the revolving force for ratchet I, alright accomplish that the scraper bit can only carry out rotary motion in same direction, accomplished promptly to utilize the scraper bit to bore the sand lid, can make the process that the oil-well pump lasts the suction. This oil-well pump husky lid processing apparatus in pit reasonable in design, stable in structure is reliable, solves the fracturing sand in the coal bed gas well fracturing operation and condenses and form the sand lid, can't utilize the tubular pump with the extrawell problem of fracturing sand suction, has also solved the problem that need change drag bit could bore the sand lid simultaneously.
Drawings
To further illustrate the present invention, further description is provided below with reference to the accompanying drawings:
FIG. 1 is a half sectional view of a general assembly drawing of a coal bed gas well frac sand pump assembly according to the present invention;
FIG. 2 is a partial enlarged view of a coal bed gas well fracturing sand pumping device at the position A;
FIG. 3 is a partial enlarged view of a coal bed gas well fractured sand pumping device at the position B;
FIG. 4 is a view in the direction C of a fracturing sand pumping device for a coal-bed gas well, which is provided by the invention;
FIG. 5 is a half sectional view of a coal bed gas well fracturing sand pumping device after the plunger of an oil well pump moves;
FIG. 6 is a perspective view of the invention;
FIG. 7 is a perspective view of the invention;
FIG. 8 is a schematic view of a partial internal half-section of the invention;
FIG. 9 is a schematic view of another partial internal half-section of the invention;
wherein: 1. an oil pipe; 2. a pump body; 3. a sucker rod; 4, an O-shaped sealing ring I; 5. compressing a spring I; 6. a plunger; 7. an annular valve I; 8. a working chamber; 9. a dustproof sealing ring; a retainer ring for an O-shaped seal ring; an O-shaped sealing ring II; 12. a compression spring II; 13. an annular valve II; 14. a flange connection; 15. a ratchet I; 16. a gasket I; 17. a deep groove ball bearing; 18. a gasket II; 19. a bolt; 20. a gasket; 21. a flange end cover; 22. a nut; 23. oil sealing; 24. a ratchet wheel II; 25. a drag bit.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The fixing means, which is not described herein, may be any one of screw fixing, bolt fixing, or glue bonding.
The first embodiment is as follows: with reference to all of the accompanying drawings; a coal bed gas well fracturing sand pumping device is characterized in that,
the bottom of the oil pipe 1 is provided with a sealing pipe external thread, the upper end of the pump body 2 is provided with a sealing pipe internal thread, and the sealing pipe external thread at the bottom of the oil pipe 1 is in fit connection with the sealing pipe internal thread at the upper end of the pump body 2;
the lower end of the pump body 2 is hermetically connected with the upper end of the working cavity 8, the lower end of the working cavity 8 is provided with an annular space, an annular valve II 13 is upwards placed in the annular space from the bottom of the working cavity 8, and a compression spring II 12 is placed in the annular space between the annular valve II 13 and the bottom of the working cavity 8;
the upper end of the flange connecting piece 14 is placed in the working cavity 8, a channel is arranged in the flange connecting piece 14, and a ribbed plate in the middle of the flange connecting piece 14 is hermetically connected with the bottom of the working cavity 8;
the lower end of the ratchet I15 is provided with internal gear teeth, the lower end of the ratchet II 24 is provided with external gear teeth, a curved channel is arranged inside the ratchet II 24, the ratchet II 24 is placed inside the ratchet I15, the internal gear teeth at the lower end of the ratchet I15 are matched and connected with the external gear teeth at the lower end of the ratchet II 24, and the bottom of the ratchet I15 is hermetically connected with the top of the scraper drill 25;
flange end cover 21 and flange joint spare 14 bottom centre place sealed 20 of filling up, flange end cover 21, flange joint spare 14 and sealed 20 bolt 19 and nut 22 fixed connection for filling up, the top of sucker rod 3 is equipped with the toper external screw thread and is used for being connected with the upper end polished rod, sucker rod 3 middle part is equipped with an annular ring, O type sealing washer I4 is placed in the annular ring, play sealing action, sucker rod 3 lower extreme is equipped with an annular space, annular valve I7 upwards places inside the annular space from sucker rod 3 bottom, compression spring I5 places between the annular space of annular valve I7 and sucker rod 3 bottom, 6 lower extremes of plunger are equipped with bent shape post, and 6 upper end's of plunger rib and 3 bottom sealing connection of sucker rod, wherein the bent shape post of 6 lower extremes of plunger is connected with the inside bent shape passageway cooperation of ratchet II 24.
The technical scheme of the invention has the following substantial technical effects and the realization process, namely the basic functions: when the ground pumping unit drives the underground sucker rod and the plunger to perform piston motion, the plunger moves upwards, the volume of the working cavity is increased to form vacuum, the compression spring I pushes the annular valve I to move downwards, the one-way valve at the lower end of the sucker rod is closed, the pressure in the working cavity is increased at the moment, the annular valve II moves upwards, the one-way valve at the lower end of the working cavity is opened, the sand cover drilled by the drill bit and fracturing sand are sucked into the working cavity, and the oil absorption process is completed; the plunger moves downwards, the volume of the working cavity is reduced, the compression spring II pushes the annular valve II to move downwards, the one-way valve at the lower end of the working cavity is closed, the pressure in the working cavity is increased, the annular valve I moves upwards, the one-way valve at the lower end of the sucker rod is opened, the sand cover and fracturing sand are discharged into an oil pipe, and the oil discharge process is completed; when the plunger moves downwards, a curved column at the lower end of the plunger is matched and connected with a curved channel in the ratchet II, so that a rotating force is provided for the ratchet II, the ratchet II is meshed with the ratchet I through gear teeth, a rotating force is provided for the ratchet I, and the ratchet I drives the drill bit to rotate, so that the aim of drilling the sand cover is fulfilled; when the plunger moved up, because there is certain clearance between curvy post and the ratchet II of plunger lower extreme, can not drive II upward movements of ratchet, but provide a revolving force opposite with before for ratchet II, because the characteristic of ratchet, ratchet II can only carry out reverse rotation motion in I inside of ratchet, can not provide the revolving force for ratchet I, alright accomplish that the scraper bit can only carry out rotary motion in same direction, accomplished promptly to utilize the scraper bit to bore the sand lid, can make the process that the oil-well pump lasts the suction. This oil-well pump husky lid processing apparatus in pit reasonable in design, stable in structure is reliable, solves the fracturing sand in the coal bed gas well fracturing operation and condenses and form the sand lid, can't utilize the tubular pump with the extrawell problem of fracturing sand suction, has also solved the problem that need change drag bit could bore the sand lid simultaneously.
The second embodiment: as a further improved scheme or a parallel scheme or an optional independent scheme, the deep groove ball bearing 17 is arranged at the lower end of the gasket I16, the gasket II 18 is arranged at the lower end of the deep groove ball bearing 17, the flange end cover 21 is arranged at the lower end of the gasket II 18, and the oil seal 23 is arranged in the middle of the flange end cover 21 to play a role in sealing. The technical scheme of the invention has the following substantial technical effects and the realization process, namely the basic functions: the present embodiment provides a specific sealing structure for the flange end cover 21 portion.
Example three: as a further development or in a side-by-side or alternatively independent solution, the inner channel of the flange connection 14 is provided at its upper end with three annular rings. The technical scheme of the invention has the following substantial technical effects and the realization process, namely the basic functions: the dust seal 9 is placed in the first annular ring at the inner upper end of the flange connection 14. The O-ring retainer 10 is placed inside the flange connection 14 in the second and third annular rings together with the O-ring ii 11.
Example four: as a further improvement or a parallel scheme or an alternative independent scheme, the upper end of the scraper drill 25 is provided with a cylinder, and the top of the cylinder at the upper end of the scraper drill 25 is hermetically connected with the bottom of the ratchet I. The technical scheme of the invention has the following substantial technical effects and the realization process, namely the basic functions: this embodiment provides a specific connection, and similar connections are all within the scope of this patent.
Example five: as a further improved scheme or a parallel scheme or an optional independent scheme, the upper end of the ratchet wheel I is provided with a protruding round table, the gasket I is placed at the lower end of the round table, the deep groove ball bearing is placed at the lower end of the gasket I, the gasket II is placed at the lower end of the deep groove ball bearing, the flange end cover is placed at the lower end of the gasket II, an oil seal is placed in the middle of the flange end cover to play a sealing role, the flange end cover and the middle of the bottom of the flange connecting piece are provided with a sealing gasket, and the flange end cover, the flange connecting piece and the sealing gasket are fixedly connected through bolts and nuts. The technical scheme of the invention has the following substantial technical effects and the realization process, namely the basic functions: the scheme provided by the embodiment provides specific position relation and connection relation.
Example six: as a further improvement scheme or a parallel scheme or an optional independent scheme, the deep groove ball bearing is a deep groove ball bearing with dust covers on two sides; the sealing connection is welding, and the welding mode is full welding.
Example seven: as a further improvement or a parallel scheme or an alternative independent scheme, the method for pumping the fracturing sand of the coal-bed gas well without replacing the drilling sand cover is characterized by utilizing the pumping device as described in any one of the above, and comprises the following steps;
the lower end of a pump body 2 is connected with a working cavity 8, the lower end of the working cavity 8 is connected with a flange connecting piece 14, the lower end of the flange connecting piece 14 is connected with a flange end cover 21, a ratchet II 24 is placed in a ratchet I15, the lower end of the ratchet I15 is connected with a drill bit 25, then the lower end of an oil pipe 1 is connected and placed underground by the oil pipe 1, so that a scraper drill bit 25 is slightly inserted into a sand cover, the lower end of a sucker rod 3 is connected with a compression spring I5, an annular valve I7 and a plunger 6, a dustproof sealing ring 9 between the plunger 6 and the working cavity 8 and an O-shaped sealing ring II 11 play a dustproof sealing role, when a ground pumping unit drives an underground sucker rod 3 and the plunger 6 to perform piston motion, the plunger 6 moves upwards, the volume of the working cavity 8 is increased to form vacuum, the compression spring I5 pushes against the annular valve I7 to move downwards, and a check valve at the lower end of the sucker rod 3 is closed, at the moment, the internal pressure of the working chamber 8 is increased, the annular valve II 13 is moved upwards, the one-way valve at the lower end of the working chamber 8 is opened, and the sand cover drilled by the scraper bit 25 and fracturing sand are sucked into the working chamber 8 to finish the oil absorption process; plunger 6 downstream, 8 size reductions in the working chamber, and compression spring II 12 is pushing against II 13 downstream of ring valve, closes the check valve of 8 lower extremes in the working chamber, and 8 internal pressure increases in the working chamber this moment, makes I7 rebound of ring valve, opens the check valve of 3 lower extremes in sucker rod, discharges sand lid and fracturing sand in oil pipe 1, accomplishes the oil extraction process.
Example eight: as a further improved scheme or a parallel scheme or an optional independent scheme, when the plunger 6 moves downwards, a curved column at the lower end of the plunger 6 is matched and connected with a curved channel in the ratchet II 24, so that a rotating force is provided for the ratchet II 24, the ratchet II 24 is meshed with the ratchet I15 through gear teeth, meanwhile, a rotating force is provided for the ratchet I15, and the ratchet I15 drives the scraper bit 25 to rotate, so that the aim of drilling the sand cover is fulfilled; when the plunger 6 upwards moves, because there is certain clearance between the bent column of plunger 6 lower extreme and II 24 of ratchet, can not drive II 24 of ratchet upward movement, but provide a revolving force opposite with before for II 24 of ratchet, because the characteristic of ratchet, II 24 of ratchet can only carry out reverse rotation motion in I15 of ratchet, can not provide the revolving force for I15 of ratchet, alright accomplish that drag bit 25 can only carry out rotary motion in same direction, accomplished promptly and utilized drag bit 25 to bore the sand cover open, can make the process that the oil-well pump lasts to recover oil.
Creatively, the above effects exist independently, and the combination of the above results can be completed by a set of structure.
It should be noted that the plurality of schemes provided in this patent include their own basic schemes, which are independent of each other and are not restricted to each other, but they may be combined with each other without conflict, so as to achieve a plurality of effects.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is to be limited to the embodiments described above.
Claims (10)
1. A coal bed gas well fracturing sand pumping device is characterized in that,
the bottom of the oil pipe (1) is provided with a sealing pipe external thread, the upper end of the pump body (2) is provided with a sealing pipe internal thread, and the sealing pipe external thread at the bottom of the oil pipe (1) is in fit connection with the sealing pipe internal thread at the upper end of the pump body (2);
the lower end of the pump body (2) is hermetically connected with the upper end of the working cavity (8), the lower end of the working cavity (8) is provided with an annular space, the annular valve II (13) is upwards placed in the annular space from the bottom of the working cavity (8), and the compression spring II (12) is placed in the annular space between the annular valve II (13) and the bottom of the working cavity (8);
the upper end of the flange connecting piece (14) is placed inside the working cavity (8), a channel is arranged inside the flange connecting piece (14), and a ribbed plate in the middle of the flange connecting piece (14) is hermetically connected with the bottom of the working cavity (8);
the lower end of the ratchet I (15) is provided with internal gear teeth, the lower end of the ratchet II (24) is provided with external gear teeth, a curved channel is arranged inside the ratchet II (24), the ratchet II (24) is placed inside the ratchet I (15), the internal gear teeth at the lower end of the ratchet I (15) are matched and connected with the external gear teeth at the lower end of the ratchet II (24), and the bottom of the ratchet I (15) is hermetically connected with the top of the scraper drill bit (25);
a sealing gasket (20) is arranged between a flange end cover (21) and the bottom of the flange connecting piece (14), the flange end cover (21), the flange connecting piece (14) and the sealing gasket (20) are fixedly connected by a bolt (19) and a nut (22), a conical external thread is arranged at the top of the sucker rod (3) and is used for being connected with an upper-end polished rod, an annular ring is arranged at the middle part of the sucker rod (3), an O-shaped sealing ring I (4) is arranged in the annular ring to play a sealing role, an annular space is arranged at the lower end of the sucker rod (3), an annular valve I (7) is upwards arranged in the annular space from the bottom of the sucker rod (3), a compression spring I (5) is arranged between the annular space at the bottoms of the annular valve I (7) and the sucker rod (3), a curved column is arranged at the lower end of a plunger (6), and the ribbed plate at the upper end of the plunger (6) is hermetically connected with the bottom of the sucker rod (3), wherein the curved column at the lower end of the plunger (6) is matched and connected with the curved channel in the ratchet II (24).
2. The pumping device for the fracturing sand of the coal-bed gas well as the coal-bed gas well is characterized in that a deep groove ball bearing (17) is arranged at the lower end of a gasket I (16), a gasket II (18) is arranged at the lower end of the deep groove ball bearing (17), a flange end cover (21) is arranged at the lower end of the gasket II (18), and an oil seal (23) is arranged in the middle of the flange end cover (21) to play a role in sealing.
3. A coal-bed gas well frac sand pump assembly as claimed in claim 1 wherein the upper end of the internal channel of the flange connection (14) is provided with three annular rings.
4. A coal-bed gas well frac sand pump assembly as claimed in claim 3 wherein the dust seal (9) is disposed in the first annular ring at the inner upper end of the flange connector (14).
5. A pumping device for fractured sand of coal-bed gas well as recited in claim 3, characterized in that the retainer ring (10) for O-ring is placed in the second and third annular rings inside the flange connecting piece (14) together with the O-ring ii (11).
6. The pumping device for the fracturing sand of the coal-bed gas well as the coal-bed gas well is characterized in that a cylinder is arranged at the upper end of the scraper bit (25), and the top of the cylinder at the upper end of the scraper bit (25) is hermetically connected to the bottom of the ratchet wheel I.
7. The pumping device for fracturing sand of the coal bed gas well as claimed in claim 1, wherein a protruding round table is arranged at the upper end of the ratchet wheel I, the gasket I is arranged at the lower end of the round table, the deep groove ball bearing is arranged at the lower end of the gasket I, the gasket II is arranged at the lower end of the deep groove ball bearing, the flange end cover is arranged at the lower end of the gasket II, an oil seal is arranged in the middle of the flange end cover for sealing, a sealing gasket is arranged in the middle of the flange end cover and the bottom of the flange connecting piece, and the flange end cover, the flange connecting piece and the sealing gasket are fixedly connected through bolts and nuts.
8. The pumping device for pumping the fracturing sand of the coal-bed gas well as the coal-bed gas well is characterized in that the deep groove ball bearing is a deep groove ball bearing with dust covers on two sides; the sealing connection is welding, and the welding mode is full welding.
9. A method for pumping fracturing sand of a coal bed gas well without replacing a drilled sand cover, which is characterized by using the pumping device as claimed in any one of claims 1 to 8, and comprising the following steps;
the lower end of a pump body (2) is connected with a working cavity (8), the lower end of the working cavity (8) is connected with a flange connecting piece (14), the lower end of the flange connecting piece (14) is connected with a flange end cover (21), a ratchet II (24) is placed inside a ratchet I (15), the lower end of the ratchet I (15) is connected with a drill bit (25), then the lower end of an oil pipe (1) is connected with the lower end of the pump body (2) by utilizing threads on the pump body, finally the pump body is connected and placed underground through the oil pipe (1), so that the scraper drill bit (25) is slightly inserted into a sand cover, the lower end of a sucker rod (3) is connected with a compression spring I (5), an annular valve I (7) and a plunger (6), a dustproof sealing ring (9) and an O-shaped sealing ring II (11) between the plunger (6) and the working cavity (8) play a dustproof sealing role, and when a ground pumping unit drives the underground sucker rod (3) and the plunger (6) to perform piston motion, the plunger (6) moves upwards, the volume of the working cavity (8) is increased to form vacuum, the compression spring I (5) pushes against the annular valve I (7) to move downwards, the one-way valve at the lower end of the sucker rod (3) is closed, the internal pressure of the working cavity (8) is increased at the moment, the annular valve II (13) moves upwards, the one-way valve at the lower end of the working cavity (8) is opened, a sand cover and fracturing sand drilled by the scraper drill bit (25) are sucked into the working cavity (8), and the oil absorption process is completed; plunger (6) lapse, working chamber (8) volume reduces, and compression spring II (12) are pushing up II (13) lapse of annular valve, close the check valve of working chamber (8) lower extreme, and working chamber (8) internal pressure increase this moment makes I (7) rebound of annular valve, opens the check valve of sucker rod (3) lower extreme, discharges sand lid and fracturing sand in oil pipe (1), accomplishes the oil extraction process.
10. The method for pumping the fracturing sand of the coal-bed gas well without replacing the drill-out sand cover is characterized in that when the plunger (6) moves downwards, a curved column at the lower end of the plunger (6) is matched and connected with a curved channel in the ratchet II (24), so that a rotating force is provided for the ratchet II (24), the ratchet II (24) is meshed with the ratchet I (15) through gear teeth, a rotating force is provided for the ratchet I (15), and the ratchet I (15) drives the scraper bit (25) to rotate, so that the purpose of drilling the sand cover is achieved; when plunger (6) rebound, because there is certain clearance between curvy post and the ratchet II (24) of plunger (6) lower extreme, can not drive ratchet II (24) upward movement, but provide a revolving force opposite before for ratchet II (24), because the characteristic of ratchet, ratchet II (24) can only carry out reverse rotation motion in ratchet I (15) inside, can not provide the revolving force for ratchet I (15), alright accomplish scraper bit (25) and can only carry out rotary motion in same direction, accomplished to utilize scraper bit (25) to bore the sand lid promptly, can make the process of oil-well pump continuation oil recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210849474.8A CN115012880B (en) | 2022-07-19 | 2022-07-19 | Fracturing sand suction device of coal-bed gas well and method for replacing drilling sand cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210849474.8A CN115012880B (en) | 2022-07-19 | 2022-07-19 | Fracturing sand suction device of coal-bed gas well and method for replacing drilling sand cover |
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| CN115012880A true CN115012880A (en) | 2022-09-06 |
| CN115012880B CN115012880B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210849474.8A Active CN115012880B (en) | 2022-07-19 | 2022-07-19 | Fracturing sand suction device of coal-bed gas well and method for replacing drilling sand cover |
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Cited By (1)
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| Publication number | Publication date |
|---|---|
| CN115012880B (en) | 2023-08-22 |
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