CN109869127B - C-ring sliding sleeve sand blaster and application method thereof - Google Patents
C-ring sliding sleeve sand blaster and application method thereof Download PDFInfo
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- CN109869127B CN109869127B CN201910184411.3A CN201910184411A CN109869127B CN 109869127 B CN109869127 B CN 109869127B CN 201910184411 A CN201910184411 A CN 201910184411A CN 109869127 B CN109869127 B CN 109869127B
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- ring
- sliding sleeve
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- ball
- sand
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- 239000004576 sand Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 51
- 230000000712 assembly Effects 0.000 claims abstract description 13
- 238000000429 assembly Methods 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 18
- 238000005488 sandblasting Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims 5
- 241001330002 Bambuseae Species 0.000 claims 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 5
- 239000011425 bamboo Substances 0.000 claims 5
- 238000004891 communication Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 239000003129 oil well Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- Pivots And Pivotal Connections (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to the field of oil well fracturing equipment, in particular to a C-ring sliding sleeve sand blaster and a using method thereof. The inner working cylinder is provided with a plurality of annular sleeve assemblies in a stacked mode, and ball seats are arranged in the annular sleeve assemblies at the bottommost. According to the invention, the diameters of all sliding sleeves are unified, and are larger than those of common sliding sleeves, so that the throttling effect is reduced, the ball is uniformly sized, the input cost can be reduced, the sliding sleeve can be used for multiple well conditions of a vertical well, a horizontal well and a directional well, the sealing level can be increased, and the construction difficulty is reduced.
Description
Technical Field
The invention relates to the field of oil well fracturing equipment, in particular to a C-ring sliding sleeve sand blaster and a using method thereof.
Background
The existing sand blaster for the motionless tubular column is only classified on the sliding sleeve and the ball, and is characterized in that the more the layers are, the diameter of the sliding sleeve from top to bottom is gradually reduced, the diameter of the ball is also gradually reduced, the sealing layer level is not too much due to the limitation of the size, the matched tool is not well produced, and the sliding sleeve with too small diameter can cause small fluid friction in the construction process, so that the construction difficulty is improved, and the construction scale is reduced.
Disclosure of Invention
The invention aims to solve the technical problems that the diameter of all sliding sleeves is unified, the throttling effect can be reduced, the ball is uniformly sized, and the C-ring sliding sleeve sand blaster can be suitable for multiple well conditions of a vertical well, a horizontal well and a directional well and is multi-environment and the using method thereof.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The C-ring sliding sleeve sand blaster comprises an upper joint, an outer working cylinder is connected with the lower end of the upper joint in a threaded manner, a lower joint is connected with the lower end of the outer working cylinder in a threaded manner, a sand blasting hole is formed in the side wall of the upper joint, an inner sliding sleeve is sleeved in the upper end of the upper joint, the upper end of the inner sliding sleeve is connected with the upper joint through a shear pin, an inner working cylinder is connected with the outer edge of the lower end of the inner sliding sleeve in a threaded manner, a central tube is slidably arranged in the inner sliding sleeve, an upper ring table which expands outwards is arranged at the lower part of the central tube, a spring is sleeved on the central tube between the upper ring table and the lower end of the inner sliding sleeve, a plurality of liquid inlet holes are uniformly distributed on the upper circumference of the central tube, a sealing head is connected with the inner edge of the lower end of the inner working cylinder in a threaded manner, a plurality of ring sleeve assemblies are stacked in the inner edge of the upper end of the sealing head, a plurality of ring sleeve assemblies are sleeved at the upper part of the bearing cylinder, an upper end of the lower ring sleeve is blocked by the lower ring table, a ring seat is sleeved at the lower ring seat is provided with a second ring seat, a ring groove is formed at the upper end of the ring seat is provided with a second ring seat, a sealing groove is formed at the upper end of the ring seat is provided with a sealing groove, and a sealing seat is provided at the two ends of a sealing seat groove, and a sealing seat is provided at the sealing seat end of a sealing seat end, and a sealing seat is provided at the sealing seat is provided,
The ring sleeve assembly comprises a C ring, a first annular groove is formed in the outer edge of the C ring, and a C-shaped spring piece is installed in the first annular groove.
Specifically, all overlap on the inner sliding sleeve of trompil top and below and be equipped with the rubber circle with upper joint inner edge sealing contact, center tube lower extreme outer fringe cover is equipped with the rubber circle with inner working cylinder inner edge sealing contact, and inner sliding sleeve inner edge passes through the rubber circle with the center tube outer fringe and seals, and sealing head lower extreme outer fringe cover is equipped with the sealing washer, is provided with the sealing washer between lower joint and the outer working cylinder.
Specifically, a rubber layer is fixed at the inner edge of the lower end of the central tube.
Specifically, a plurality of exhaust holes are partially formed in the upper circumference of the inner working cylinder between the sealing head and the lower annular table.
Specifically, the outer edge of ball seat upper end is provided with the chamfer.
Compared with the prior art, the invention has the beneficial effects that:
The invention has simple structure, convenient use and operation, uniform drift diameter of all sliding sleeves, larger drift diameter than that of common sliding sleeves, reduced throttling effect, uniform ball throwing size, reduced input cost, and can be used for multiple well conditions of vertical wells, horizontal wells and directional wells, multiple rings, increased seal stage number and reduced construction difficulty.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of the area a in fig. 1.
Fig. 3 is an enlarged view of region B in fig. 1.
FIG. 4 is a schematic structural view of the collar assembly.
Fig. 5 is a schematic structural view of the C-ring.
Fig. 6 is a schematic structural view of the tee.
Detailed Description
As shown in fig. 1-6, the C-ring sliding sleeve sand blaster comprises an upper joint 1, an outer working cylinder 4 is connected with the lower end of the upper joint 1 in a threaded manner, a lower joint 11 is connected with the lower end of the outer working cylinder 4 in a threaded manner, sand spraying holes 13 are formed in the side wall of the upper joint 1, an inner sliding sleeve 2 is sleeved in the upper joint 1, the upper end of the inner sliding sleeve 2 is connected with the upper joint 1 through a shear pin 12, an inner working cylinder 6 is connected with the outer edge of the lower end of the inner sliding sleeve 2 in a threaded manner, a central tube 3 is arranged in the inner sliding sleeve 2, a rubber layer 15 is fixed on the inner edge of the lower end of the central tube 3, an upper ring table 20 which expands outwards is arranged at the lower part of the central tube 3, a spring 5 is sleeved on the central tube 3 between the upper ring table 20 and the lower end of the inner sliding sleeve 2, a plurality of liquid inlet holes 14 are uniformly distributed on the upper circumference of the central tube 3, the liquid inlet holes 14 are communicated with a cavity between the upper ring table 20 of the central tube 3 and the lower end of the inner sliding sleeve 2, the inner periphery of the lower end of the inner working cylinder 6 is in threaded connection with a sealing head 10, a plurality of exhaust holes 22 are partially formed in the upper circumference of the inner working cylinder 6 between the sealing head 10 and a lower ring table 21, the inner periphery of the upper end of the sealing head 10 is in threaded connection with a bearing cylinder 9, the upper part of the bearing cylinder 9 is provided with the lower ring table 21, a plurality of ring sleeve assemblies are stacked in the inner working cylinder 6 between the upper end of the bearing cylinder 9 and the lower end of the central tube 3, the lowest ring sleeve assembly is sleeved at the upper end of the bearing cylinder 9 and blocked by the lower ring table 21, a ball seat 8 is arranged in the ring sleeve assembly, the outer edge of the upper end of the ball seat 8 is provided with a chamfer, the ball seat 8 is blocked by the upper end of the bearing cylinder 9, the upper end of the ball seat 8 is provided with a sealing surface 18 for sealing with a ball, the ball seat 8 is cut into two parts through a laser inclined seam, a second ring groove 19 is formed in the outer edge of the ball seat 8, and a sealing ring is sleeved in the second ring groove 19.
The ring sleeve assembly comprises a C ring 7, a first annular groove 17 is formed in the outer edge of the C ring 7, and a C-shaped spring piece 16 is installed in the first annular groove 17.
Rubber rings in sealing contact with the inner edge of the upper joint 1 are sleeved on the inner sliding sleeve 2 above and below the sand blasting holes 13, rubber rings in sealing contact with the inner edge of the inner working cylinder 6 are sleeved on the outer edge of the lower end of the central tube 3, the inner edge of the inner sliding sleeve 2 is sealed with the outer edge of the central tube 3 through the rubber rings, a sealing ring is sleeved on the outer edge of the lower end of the sealing head 10, and a sealing ring is arranged between the lower joint 11 and the outer working cylinder 4.
When the novel sand blasting device is used, a plurality of C-ring sliding sleeve sand blasters are connected to a pipe column and are placed in a well, the number of collar assemblies of the C-ring sliding sleeve sand blasters from top to bottom is sequentially reduced, the C-ring sliding sleeve sand blasters are not needed in a first layer, fracturing fluid flows out of a lower port of the pipe column to fracture a first layer, the number of collar assemblies in the C-ring sliding sleeve sand blasters on a second layer is 0, at the moment, ball seats 8 in the C-ring sliding sleeve sand blasters on the second layer are positioned inside the lower end of a central pipe 3, the ball seats 8 are in sealing contact with a rubber layer 15 on the inner edge of the lower end of the central pipe 3, the upper end of the central pipe 3 is positioned below a sand blasting hole 13 of an upper joint 1, and the number of collar assemblies in the C-ring sliding sleeve sand blasters on a third layer is sequentially increased.
Throwing a ball into the tubular column, sealing the ball seat 8 in the C-ring sliding sleeve sand blaster with the sealing surface 18 on the ball seat 8 after the ball throwing enters the ball seat 8, introducing fracturing fluid into the tubular column at the moment, pushing the fracturing fluid downwards under the action of the pressure of the fracturing fluid, simultaneously applying pressure to the upper annular platform 20 in the annular space between the inner working cylinder 6 and the central tube 3 through the fluid inlet 14, expanding the ball seat 8 consisting of two parts at the moment, expanding the ball seat 8, expanding the C-ring 7 at the outer edge of the C-ring 7 by the ball seat 8, compressing the C-shaped spring piece 16 at the outer edge of the C-ring 7, pushing the C-ring 7 expanded along with the ball seat 8 between the bearing cylinder 9 and the inner working cylinder 6 under the action of the thrust of the fracturing fluid in the annular space between the spring 5, the inner working cylinder 6 and the central tube 3, and simultaneously preventing the ball throwing hole 22 from simultaneously entering the lower C-ring sliding sleeve by the ball seat assembly, and supporting the ball seat 8 under the action of the elastic force of the spring 5 at the moment under the ball seat 8 by the ball seat 21.
After the ball is thrown once through the C-ring sliding sleeve sand blaster, the collar assembly between the bearing cylinder 9 and the central tube 3 is reduced by one, under the action of the spring 5, the central tube 3 gradually approaches to the bearing cylinder 9, when the ball is thrown into the C-ring sliding sleeve sand blaster of the second layer, because the upper end of the central tube 3 of the C-ring sliding sleeve sand blaster of the second layer is positioned below the sand spraying holes 13, the ball seat 8 is sleeved at the lower end of the central tube 3, after the ball is thrown onto the ball seat 8, the ball seat 8 cannot expand outwards after the ball is thrown and the ball seat 8 is sealed and subjected to the pressure of fracturing fluid, under the pressure of the fracturing fluid, the ball seat 8, the bearing cylinder 9, the sealing head 10, the inner working cylinder 6 and the inner sliding sleeve 2 can descend in the outer working cylinder 4, meanwhile, the shear pins 12 are sheared, the sealing head 10 is inserted into the lower joint 11, the holes 13 are opened, and the fracturing fluid can flow out through the sand spraying holes 13 to fracture the second layer.
As the number of shots increases in sequence, the collar assembly between the receiving cylinder 9 and the central tube 3 in the C-ring sliding sleeve sand blaster enters between the receiving cylinder 9 and the inner working cylinder 6 in sequence, and when the collar assembly between the receiving cylinder 9 and the central tube 3 in the C-ring sliding sleeve sand blaster enters between the receiving cylinder 9 and the inner working cylinder 6 in total, the sand blast hole 13 of the C-ring sliding sleeve sand blaster without the collar assembly between the receiving cylinder 9 and the central tube 3 will be opened and fracture the layer where the sand blast hole is located when the ball is shot next time.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
- The utility model provides a C ring sliding sleeve sand blaster, including upper joint (1), a serial communication port, upper joint (1) lower extreme threaded connection has outer working barrel (4), outer working barrel (4) lower extreme threaded connection has lower joint (11), sand spraying hole (13) have been seted up on the lateral wall of upper joint (1), upper joint (1) endotheca is equipped with interior sliding sleeve (2), interior sliding sleeve (2) upper end is connected through shear pin (12) with upper joint (1), interior sliding sleeve (2) lower extreme outer fringe threaded connection has interior working barrel (6), interior sliding sleeve (2) are provided with center tube (3) in the slip, center tube (3) lower part is provided with outside expansion's upper ring platform (20), center tube (3) between upper ring platform (20) and interior sliding sleeve (2) lower extreme go up the cover and be equipped with spring (5), a plurality of feed liquor holes (14) have been seted up on the circumference on center tube (3), cavity between interior sliding sleeve (2) lower extreme and interior sliding sleeve (2) upper ring platform (20) and interior sliding sleeve (2), interior sliding sleeve's lower extreme outer edge threaded connection (10) has bearing seal head (9) in the upper ring platform (9), a plurality of ring sleeve assemblies are stacked in an inner working cylinder (6) between the upper end of a bearing cylinder (9) and the lower end of a central tube (3), the lowermost ring sleeve assembly is sleeved at the upper end of the bearing cylinder (9) and blocked by a lower ring table (21), a ball seat (8) is arranged in the lowermost ring sleeve assembly, the ball seat (8) is blocked by the upper end of the bearing cylinder (9), a sealing surface (18) for sealing a ball is arranged at the upper end of the ball seat (8), the ball seat (8) is cut into two parts through a laser inclined seam, a second annular groove (19) is formed in the outer edge of the ball seat (8), a sealing ring is sleeved in the second annular groove (19), the ring sleeve assembly comprises a C ring (7), a first annular groove (17) is formed in the outer edge of the C ring (7), and a C-shaped spring piece (16) is arranged in the first annular groove (17).
- 2. The C-ring sliding sleeve sand blaster as claimed in claim 1, wherein rubber rings in sealing contact with the inner edge of the upper joint (1) are sleeved on the inner sliding sleeve (2) above and below the sand blasting hole (13), the outer edge of the lower end of the central tube (3) is sleeved with a rubber ring in sealing contact with the inner edge of the inner working tube (6), the inner edge of the inner sliding sleeve (2) is sealed with the outer edge of the central tube (3) through the rubber ring, the outer edge of the lower end of the sealing head (10) is sleeved with a sealing ring, and a sealing ring is arranged between the lower joint (11) and the outer working tube (4).
- 3. A C-ring sliding sleeve sand blaster according to claim 2, characterized in that the inner edge of the lower end of the central tube (3) is fixed with a rubber layer (15).
- 4. A C-ring sliding sleeve sand blaster as claimed in claim 3, characterized in that a plurality of exhaust holes (22) are partially formed in the circumference of the inner working cylinder (6) between the sealing head (10) and the lower ring table (21).
- 5. A C-ring sliding sleeve sand blaster as claimed in claim 1, wherein the outer edge of the upper end of the ball seat (8) is provided with a chamfer.
- 6. The method for using the C-ring sliding sleeve sand blaster based on claim 4 is characterized in that when the method is used, a plurality of C-ring sliding sleeve sand blasters are connected to a pipe column and are put down into a well, the number of lantern ring assemblies of the plurality of C-ring sliding sleeve sand blasters from top to bottom is sequentially reduced, the first layer does not need the C-ring sliding sleeve sand blasters, fracturing fluid can flow out of a fracturing fluid from the lower port of the pipe column to carry out fracturing on the first layer, the number of lantern ring assemblies in the C-ring sliding sleeve sand blaster positioned on the second layer is 0, at the moment, a ball seat (8) in the C-ring sliding sleeve sand blaster positioned on the second layer is positioned inside the lower end of the central pipe (3), the ball seat (8) is in sealing contact with a rubber layer (15) at the inner edge of the lower end of the central pipe (3), the upper end of the central pipe (3) is positioned below a sand blasting hole (13) of an upper joint (1), the number of the lantern ring assemblies in the C-ring sand blaster on the third layer is 1, the number of lantern ring assemblies in turn increases, a ball is thrown into the pipe column, the ball is thrown into the ball in the C-ring sand blaster, the ball enters the ball seat (8) and then has a trend of expanding fluid from the lower end to the ball seat (8) and then moves into a sealing surface (18) in the annular sleeve sand ball sleeve sand blaster (3) through the sealing surface (6) and the sealing surface (20) simultaneously, the pressure is forced into the pressure ball seat (20) and the pressure ball seat (6) and the fracturing fluid and the pressure ball has a trend to move into the sealing surface (18, after the ball seat (8) expands, the ball seat (8) can enable the C ring (7) where the ball seat (8) is located to expand outwards, a C-shaped spring piece (16) at the outer edge of the C ring (7) is compressed, when the C ring (7) expands to the outer side of the lower ring table (21), under the thrust action of fracturing fluid in an annular space between the spring (5), the inner working cylinder (6) and the central tube (3), the C ring (7) expanded along with the ball seat (8) can be pushed to between the receiving cylinder (9) and the inner working cylinder (6), the exhaust hole (22) can prevent a lantern ring assembly from simultaneously throwing balls to enter a lower C ring sliding sleeve sand blaster, at the moment, the lantern ring assembly above the ball seat (8) sleeves the ball seat (8) in the ball seat by the elastic action of the spring (5) and is supported by the lower ring table (21), the lantern ring assembly between the receiving cylinder (9) and the central tube (3) is reduced by one time after the ball is thrown through the C ring sliding sleeve, under the action of the spring (5), the central tube (3) gradually approaches the receiving cylinder (9) and the ball seat (3) to be gradually close to the ball seat (3) and then enters the second ball seat (8) to the second ball seat (3) and the ball seat (3) and then drops to the second ball seat (3) and the ball seat (3, after throwing ball and ball seat (8) are sealed and receive the pressure of fracturing fluid, ball seat (8) can not outwards expand, under the pressure effect of fracturing fluid, throw ball, ball seat (8), accept section of thick bamboo (9), sealing head (10), interior working barrel (6) and interior sleeve (2) will descend in outer working barrel (4), shear pin (12) are sheared simultaneously, sealing head (10) are inserted in lower joint (11), sand blast hole (13) are opened, fracturing fluid will flow through sand blast hole (13), fracture to the second floor, with throwing ball number increases in proper order, accept between section of thick bamboo (9) and the interior working barrel (6) in the C ring sliding sleeve sandblast, accept between section of thick bamboo (9) and the center tube (3) the lantern ring assembly all enter into in the C ring sliding sleeve sandblast and accept between section of thick bamboo (9) and the interior working barrel (6), accept between section of thick bamboo (9) and center tube (3) the C ring assembly and do not open its fracturing layer to the sand blast hole (13) of the C ring assembly when throwing the ball next time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184411.3A CN109869127B (en) | 2019-03-12 | 2019-03-12 | C-ring sliding sleeve sand blaster and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184411.3A CN109869127B (en) | 2019-03-12 | 2019-03-12 | C-ring sliding sleeve sand blaster and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109869127A CN109869127A (en) | 2019-06-11 |
| CN109869127B true CN109869127B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910184411.3A Active CN109869127B (en) | 2019-03-12 | 2019-03-12 | C-ring sliding sleeve sand blaster and application method thereof |
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| CN (1) | CN109869127B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116084905B (en) * | 2023-03-13 | 2023-07-18 | 大庆市璞庆钻采设备制造有限公司 | Sand blaster for oilfield stratum fracturing |
| CN116696329B (en) * | 2023-08-03 | 2023-10-31 | 东营垣发石油科技有限公司 | Directional verification device and method for horizontal well |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485754A (en) * | 2013-10-14 | 2014-01-01 | 中国石油化工股份有限公司 | Integrated underground hydraulic control fully-opened type sliding sleeve abrasive blasting and packing staged fracturing device |
| CN204024624U (en) * | 2014-06-20 | 2014-12-17 | 中国石油天然气股份有限公司 | Multistage large-drift-diameter annular throttling sand blower |
| CA2856184A1 (en) * | 2013-07-10 | 2015-01-10 | Donald Getzlaf | Fracturing valve |
| CN104632169A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Infinite-stage fracturing sand blasting sliding sleeve and process method |
| CN109281646A (en) * | 2018-10-27 | 2019-01-29 | 濮阳东昊机械电子有限公司 | Small-well cracking tubing string and its application method |
| CN210033397U (en) * | 2019-03-12 | 2020-02-07 | 濮阳博瑞特石油工程技术有限公司 | C-ring sliding sleeve sand blower |
-
2019
- 2019-03-12 CN CN201910184411.3A patent/CN109869127B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2856184A1 (en) * | 2013-07-10 | 2015-01-10 | Donald Getzlaf | Fracturing valve |
| CN103485754A (en) * | 2013-10-14 | 2014-01-01 | 中国石油化工股份有限公司 | Integrated underground hydraulic control fully-opened type sliding sleeve abrasive blasting and packing staged fracturing device |
| CN104632169A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Infinite-stage fracturing sand blasting sliding sleeve and process method |
| CN204024624U (en) * | 2014-06-20 | 2014-12-17 | 中国石油天然气股份有限公司 | Multistage large-drift-diameter annular throttling sand blower |
| CN109281646A (en) * | 2018-10-27 | 2019-01-29 | 濮阳东昊机械电子有限公司 | Small-well cracking tubing string and its application method |
| CN210033397U (en) * | 2019-03-12 | 2020-02-07 | 濮阳博瑞特石油工程技术有限公司 | C-ring sliding sleeve sand blower |
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