CN210530797U - Soluble bridge plug capable of synchronously feeding balls - Google Patents
Soluble bridge plug capable of synchronously feeding balls Download PDFInfo
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- CN210530797U CN210530797U CN201921584430.7U CN201921584430U CN210530797U CN 210530797 U CN210530797 U CN 210530797U CN 201921584430 U CN201921584430 U CN 201921584430U CN 210530797 U CN210530797 U CN 210530797U
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- 238000007789 sealing Methods 0.000 claims abstract description 88
- 238000010008 shearing Methods 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of downhole tools of oil and gas wells, in particular to a soluble bridge plug capable of synchronously feeding balls, which comprises a central tube, wherein the central tube is of an axial hollow structure, and the outer circumference of the central tube is provided with a fracturing ball, a cone, slips and a guide shoe from top to bottom in sequence; the fracturing ball is connected with the upper end of the central pipe in a sealing manner, the lower end of the cone is connected with the upper end of a slip, and the lower end of the slip is connected with the upper end of a guide shoe; the upper end of center tube is equipped with out of hand shearing screw hole, and the lower extreme of center tube is equipped with connecting thread, the utility model discloses a center tube passes through shear screw and sits to seal the adapter and is connected, and it has the space of placing the fracturing ball to reserve between center tube and the sit adapter, makes can send the soluble bridging plug of ball in step to be connected with the sit adapter and not influenced, from reaching the purpose of sending the ball in step, does not need additionally to throw the ball, has shortened the activity duration greatly, has reduced the pump sending liquid measure and has reduced manufacturing cost.
Description
Technical Field
The utility model relates to an oil gas downhole tool technical field especially relates to a can send soluble bridging plug of ball in step.
Background
Along with the continuous deepening of oil exploration and development, unconventional oil and gas reservoirs with low permeability, low porosity and the like are increased continuously, the development requirements cannot be met by a conventional vertical well, and a horizontal well gradually becomes a necessary means for improving the comprehensive benefits of the oil exploration and development. The horizontal well has the advantages of large oil drainage area, high single well yield, large penetration degree, high reserve utilization degree, capability of effectively avoiding obstacles and harsh environment zones and the like, and becomes the focus of attention of people in scientific research and practice of the petroleum industry.
The technology of bridge plug clustering perforation combined operation-segmented fracturing is widely used at present, and has the advantages of one-time pipe column operation, no limitation of segmentation, simple tool pipe column structure, smooth shaft and the like. As one of the important tools for staged fracturing, bridge plugs are increasingly used. Currently, conventional bridge plugs include drillable bridge plugs, dissolvable bridge plugs, and the like. The drillable bridge plug needs to be drilled and ground by a drilling tool after fracturing is finished.
In the far end of the horizontal well or the ultra-long horizontal well, the drilling and grinding efficiency is low, and the soluble bridge plug is adopted, so that the soluble bridge plug can be automatically decomposed within a certain time after fracturing is completed, and the drilling and grinding are reduced.
However, the existing soluble bridge plug has the defects that the components are not completely soluble, or the time required for dissolving is long, so that the working efficiency is influenced; in addition, the soluble bridge plug on the market needs to be added with a plurality of working procedures to complete ball feeding work in the follow-up process, the soluble bridge plug firstly goes to a preset position to be set and sealed when going down the well, then a setting tool is taken out, a fracturing ball is thrown at the well mouth, the ball is pumped to the bridge plug position through a hydraulic pump to be fractured, the ball has the risk of damage in the pumping process, the sealing performance of the ball is influenced, and the pumping liquid quantity and the working time are increased due to the addition of the working procedure of pumping the ball, so that the mining cost is increased.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a can send soluble bridging plug of ball in step, the center tube passes through shear screw and sits to seal the adapter and be connected, and it has the space of placing the fracturing ball to reserve between center tube and the seat adapter, makes can send soluble bridging plug of ball in step and sit to seal the adapter and be connected and not influenced, from reaching the purpose of sending the ball in step, does not need additionally to throw the ball, has shortened the activity duration greatly, has reduced the pump sending liquid measure and has reduced manufacturing cost.
In order to solve the technical problem, the utility model provides a concrete scheme as follows:
a soluble bridge plug capable of synchronously feeding balls comprises a central tube, wherein the central tube is of an axial hollow structure, and a fracturing ball, a cone, a slip and a guide shoe are sequentially arranged on the outer circumference of the central tube from top to bottom;
the fracturing ball is connected with the upper end of the central pipe in a sealing manner, the lower end of the cone is connected with the upper end of a slip, and the lower end of the slip is connected with the upper end of a guide shoe;
the upper end of the central tube is provided with a hand-off shearing screw hole, and the lower end of the central tube is provided with a connecting thread.
Optionally, the upper end of the cone is provided with a shearing pin hole, an inner hole of the cone is provided with a sealing ring, and a sealing assembly is arranged at the joint of the cone and the slip, so that the connection sealing performance between the cone and the central pipe and between the cone and the slip is improved, and the use stability is further improved.
Optionally, the sealing assembly sequentially comprises a sealing retainer ring, a sealing ring, a first sealing support ring, a second sealing support ring and a third sealing support ring;
the first sealing support ring is provided with a sealing clamp ring and a first notch, the second sealing support ring is provided with a second notch, and the third sealing support ring is provided with a third notch;
the 120 degrees settings of staggering each other between first breach, second breach and the third breach, the sealed support ring of three-layer, when sealed support ring is propped greatly, sealed snap ring chucking sealing ring lower extreme guarantees to have at least two-layer support ring to play the supporting role, can more even effectual support and protection sealing ring, prevents that the sealing ring from being extruded the risk when bearing high pressure differential.
Optionally, an angle formed by the upper ends of the sealing retainer ring and the sealing ring and the axis direction is 30 degrees, the sealing retainer ring is coated on the outer circle surface of the upper end of the sealing ring to guide the upper end fluid to overflow, the sealing ring is protected from being washed away by the upper end fluid, and the use stability is ensured.
Optionally, an angle formed by the conical surface of the outer surface of the cone and the axis direction is negative 5-10 degrees, an angle formed by the inner surface of the sealing ring and the axis direction is positive 5-10 degrees, an angle formed by the conical surface of the outer surface of the cone and the axis direction is consistent with an angle of a conical surface arranged on the inner surface of the sealing ring, the area of the sealing ring tightly attached to the sleeve is larger, the sealing is more uniform, and the sealing effect is better.
Optionally, ceramic grains are embedded in the outer surface of the slip, and an angle formed between the axial direction of the ceramic grains and the axial direction of the slip ranges from 75 degrees to 80 degrees, so that the effect of anchoring the bridge plug on the casing is achieved.
Optionally, the height of the slip with the ceramic particles protruding out is smaller than that of the slip with the sealing ring protruding out, so that when the bridge plug is in setting, the sealing ring is firstly expanded and attached to the wall of the casing, and then the slip is anchored to the casing, so that the sealing ring is squeezed between the cone and the casing, and the sealing effect is ensured.
Optionally, be equipped with the overflow groove on the guide shoe, overflow the groove and can prevent to return on the fracturing ball of the preceding interval and block up the flowback passageway when open flow flowback after the fracturing, guarantee that the flowback passageway is unobstructed.
Optionally, a first open slot is formed in the upper end of the slip, and a first stress release hole is drilled in the lower end of the first open slot; the lower end of the slip is provided with a second open slot, the upper end of the second open slot is drilled with a second stress release hole, the first open slot and the second open slot are uniformly arranged on the slip at intervals, the first open slot and the second open slot enable the slip to be uniformly opened when the slip is set, and the first stress release hole and the second stress release hole are unlikely to directly tear the first open slot and the second open slot when the slip is opened, so that the possibility of the slip fracture is caused.
Optionally, the lower extreme internal surface of slips is equipped with interior draw-in groove, the upper end surface of guide is equipped with the outer draw-in groove of being comparable with interior draw-in groove, ensures the stability of being connected of slips and guide, prevents that the bridging from setting in advance when going into the well, improves stability in use.
The slip is characterized in that a clutch groove is formed in the end face of the lower end of the slip, and a clutch convex groove matched with the clutch groove is formed in the outer end face of the upper end of the guide shoe, so that the slip is more uniformly opened during setting, the clamping position is more stable, and the use stability is further improved.
Compared with the prior art, the beneficial effects of the utility model reside in that: 1. the upper end of the central tube of the utility model is provided with a shear screw hole, the central tube is connected with the setting adapter through the shear screw, a space for placing a fracturing ball is reserved between the central tube and the setting adapter, so that the soluble bridge plug capable of synchronously sending the ball is connected with the setting adapter without being influenced, the purpose of synchronously sending the ball can be achieved, additional ball throwing is not needed, the operation time is greatly shortened, the pump sending liquid amount is reduced, and the production cost is reduced;
2. the single slip type is adopted, so that the overall length of the bridge plug is shortened, the using amount of soluble materials is reduced, the structure is simple and reliable, batch processing is facilitated, meanwhile, the running process is more stable, the bridge plug is not easy to block, the dissolving time is shorter, drilling and grinding are not needed, the bridge plug can be completely dissolved only by utilizing electrolyte-containing solution which is returned from the bottom layer, the full drift diameter of a shaft is flowed out for subsequent production, the operation risk caused by drilling operation is eliminated, the operation time is shortened, the production cost is reduced, and an oil-gas layer is protected;
3. the synchronous ball feeding soluble bridge plug can be dissolved automatically without drilling, is not limited by the depth of the coiled tubing in the horizontal section, realizes staged fracturing yield increase of a longer horizontal section, and improves the oil gas recovery ratio;
4. all parts on this synchronous ball feeding soluble bridge plug are fixed on the center tube directly or indirectly, have prevented effectively that the bridge plug from appearing unexpected setting in advance when going into the well.
Drawings
Fig. 1 is a cross-sectional view of an overall structure of a soluble bridge plug capable of synchronously feeding balls according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a seal assembly provided in an embodiment of the present invention.
Fig. 3 is an exploded view of a seal assembly provided in an embodiment of the present invention.
Fig. 4 is a schematic view of a slip structure provided in an embodiment of the present invention.
Fig. 5 is a schematic structural view of a setting adapter provided in an embodiment of the present invention.
Wherein, 1 is a central tube; 11 is a hand-off cut screw hole; 2 is a fracturing ball; 3 is a cone; 31 is a shear pin hole; 32 is a sealing ring; 4, slips; 41 is ceramic particles; 42 is a first open slot; 43 is a second open slot; 44 is a clutch groove; 5, guide shoes; 51 is an overflowing groove; 52 is a clutch convex groove; 6 is a sealing component; 61 is a sealing retainer ring; 62 is a sealing ring; 63 is a first seal support ring; 631 is a sealing snap ring; 632 is a first notch; a second seal support ring 64; 641 is a second gap; 65 is a third seal support ring; 651 is a third notch; 7 is a setting adapter; 71 is a push cylinder; 72 is a clamp spring; 73 is an adapter; 74 is a shear screw.
Detailed Description
In order to explain the technical solution of the present invention in detail, the following will combine the drawings of the embodiments of the present invention to perform clear and complete description on the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
For example, the soluble bridge plug capable of synchronously feeding balls comprises a central pipe, wherein the central pipe is of an axial hollow structure, and a fracturing ball, a cone, a slip and a guide shoe are sequentially arranged on the outer circumference of the central pipe from top to bottom; the fracturing ball is connected with the upper end of the central pipe in a sealing manner, the lower end of the cone is connected with the upper end of a slip, and the lower end of the slip is connected with the upper end of a guide shoe; the upper end of the central tube is provided with a hand-off shearing screw hole, and the lower end of the central tube is provided with a connecting thread.
The soluble bridge plug capable of synchronously sending the balls provided by the embodiment has the advantages that the central tube is connected with the setting adapter through the shear screw, the space for placing the fracturing balls is reserved between the central tube and the setting adapter, the soluble bridge plug capable of synchronously sending the balls is connected with the setting adapter without being influenced, the purpose of synchronously sending the balls can be achieved, additional ball throwing is not needed, the operation time is greatly shortened, the pumping liquid amount is reduced, and the production cost is reduced.
In some embodiments, as shown in fig. 1-4, a soluble bridge plug capable of synchronously sending balls is provided, which comprises a central tube, wherein the central tube is of an axial hollow structure, and a fracturing ball, a cone, slips and a guide shoe are sequentially arranged on the outer circumference of the central tube from top to bottom; the fracturing ball is hermetically connected with the upper end of the central pipe, the lower end of the cone is connected with the upper end of the slip, and the lower end of the slip is connected with the upper end of the guide shoe; the upper end of the central tube is provided with a hand-off shearing screw hole, and the lower end of the central tube is provided with a connecting thread.
It is specific, be equipped with shear screw in the shear screw hole of taking off the hand of center tube upper end, connect center tube and seat adapter through shear screw, it has the space of placing the fracturing ball to reserve between center tube and the seat adapter, fracturing ball and center tube upper end sealing connection, this soluble bridging plug body adopts the dissoluble material of solvent to make, need not to bore and grind, the solution that contains the electrolyte that only needs to utilize the bottom to flow back can dissolve the bridging plug completely, single slips structure makes the whole length of bridging plug shorten, it is difficult for being obstructed more stable to go into the process down, solution time is shorter, each part of this bridging plug is fixed on the center tube directly or indirectly, the accident appears and sits in advance when going into the well effectively prevented the bridging plug.
In some embodiments, the upper end of the cone is provided with a shearing pin hole, the inner hole of the cone is provided with a sealing ring, and the joint of the cone and the slip is provided with a sealing assembly, so that the connection sealing performance between the cone and the central pipe and between the cone and the slip is improved, and the use stability is further improved.
The utility model discloses a well drilling device, including the guide shoe, the guide shoe is equipped with the inner thread, the upper end of cone is equipped with the shear pin hole, the accessible shear pin is fixed cone and center tube, the upper end of guide shoe is equipped with the inner thread, cooperate with the connecting thread of center tube lower extreme, make each part on this bridging plug by direct or indirect fixing on the center tube, effectually prevented that the bridging plug from unexpected seat in advance appearing when going into the well, in this example, sealing washer and seal assembly all adopt the dissoluble material of solvent to make, make only need utilize the bottom to return the solution that contains the electrolyte that arranges can dissolve the bridging plug completely.
In some embodiments, the seal assembly comprises, in order, a seal retainer ring, a seal ring, a first seal support ring, a second seal support ring, and a third seal support ring; the first sealing support ring is provided with a sealing clamp ring and a first notch, the second sealing support ring is provided with a second notch, and the third sealing support ring is provided with a third notch; 120 degrees settings of staggering each other between first breach, second breach and the third breach, the sealed support ring of three-layer, when sealed support ring is propped greatly, sealed snap ring chucking sealing ring lower extreme guarantees to have at least two-layer support ring to play the supporting role, can more even effectual support and protection sealing ring, prevents that the sealing ring from being extruded the risk when bearing high pressure differential.
The angle formed by the upper ends of the sealing retainer ring and the sealing ring and the axis direction is 30 degrees, the sealing retainer ring is coated on the surface of the excircle of the upper end of the sealing ring, the fluid at the upper end is guided to flow over, the sealing ring is protected from being washed away by the fluid at the upper end, and the use stability is ensured.
The angle range formed by the conical surface of the outer surface of the cone and the axis direction is minus 5-10 degrees, the angle range formed by the inner surface of the sealing ring and the axis direction is plus 5-10 degrees, the angle formed by the conical surface of the outer surface of the cone and the axis direction is consistent with the angle of the conical surface arranged on the inner surface of the sealing ring, the area of the sealing ring tightly attached to the sleeve is larger, the sealing is more uniform and dense, and the sealing effect is better. In this example, the angle formed by the conical surface of the outer surface of the cone and the axial direction and the angle of the conical surface arranged on the inner surface of the sealing ring are both 6.5 degrees, and the angle is favorable for the sealing ring to expand when the cone moves downwards, so that the first sealing support ring, the second sealing support ring and the third sealing support ring are opened, and the slips are opened.
The outer surface of the slip is embedded with ceramic grains, and the angle formed by the axial direction of the ceramic grains and the axial direction of the slip ranges from 75 degrees to 80 degrees, so that the bridge plug is anchored on the casing. The height of the slip with the protruding ceramic particles is smaller than that of the slip with the protruding sealing ring, so that when the bridge plug is in a setting state, the sealing ring is firstly expanded and attached to the wall of the casing, then the slip is anchored on the casing, the sealing ring is extruded between the cone and the casing, and the sealing effect is guaranteed. Specifically, the ceramic grain adopts the pottery of high strength material, and the axial of ceramic grain and slips axial are formed an angle and are 75 degrees, can play better aim at the effect.
Be equipped with the overflow groove on the guide shoe, overflow the groove and can prevent to return on the fracturing ball of the blowout flowback time interval before the fracturing after the fracturing and block up the flowback passageway, guarantee that the flowback passageway is unobstructed. The upper end of the slip is provided with a first open slot, and the lower end of the first open slot is drilled with a first stress release hole; the lower extreme of slips is equipped with the second open slot, and the upper end of second open slot is bored there is the second stress release hole, and first open slot and second open slot even interval set up on the slips, and first open slot and second open slot make the slips evenly open when setting, and first stress release hole and second stress release hole are then when the slips opens, are unlikely to directly tear first open slot and second open slot, lead to the cracked possibility of slips.
The lower extreme internal surface of slips is equipped with interior draw-in groove, and the upper end surface of guide shoe is equipped with the outer draw-in groove of matching with interior draw-in groove, ensures the stability of being connected of slips and guide shoe, prevents that the bridging plug from setting in advance when going into the well, improves stability in use. The slip is provided with a clutch groove on the lower end face of the slip, and a clutch convex groove matched with the clutch groove is arranged on the upper end face of the guide shoe, so that the slip is more uniformly opened during setting, the clamping position is more stable, and the use stability is further improved.
Referring to fig. 5, a setting adapter is shown, the setting adapter 7 includes a pushing cylinder 71, a snap spring 72, an adapter 73 and a shear screw 74 for releasing hand, the soluble bridge plug capable of synchronously sending balls provided by the present invention needs to be used in cooperation with the setting adapter when sending in and setting.
Specifically, after the first section perforation fracturing of staged fracturing operation is completed, a soluble bridge plug tool string capable of synchronously feeding balls is put in, after the tool string is put in to the designed depth, the setting is started through cable ignition or hydraulic pressure, a setting tool generates thrust to push a setting adapter push cylinder to move downwards, so that a cone is pushed to move downwards, due to the fact that the conical surface of 6.5 degrees is arranged on the cone, the cone moves downwards to enable a sealing ring to expand, a sealing support ring is enabled to open, a slip is enabled to open, after the sealing ring is completely attached to the inner wall of a casing and certain extrusion is achieved, and the slip is anchored to the inner wall of the casing, the soluble bridge plug capable of synchronously feeding balls is set and hung, at the moment, the cone is firmly wedged together with the slip, and cannot continuously move downwards.
After the synchronous ball feeding soluble bridge plug is set, the thrust generated by the setting tool continues to rise, when the thrust rises to the shearing force of the shearing screw, the shearing screw is sheared to realize the separation of the adapter and the bridge plug, the tool string is lifted for a certain distance to reach a preset position for perforation, then the tool string is taken out for fracturing operation, at the moment, the fracturing ball seals the upper end of the central tube, the annular space between the central tube, the cone and the casing is sealed by the sealing ring, and the sealing of the upper and lower fracturing intervals is realized.
After the fracturing operation is completed, open flow is performed for flowback, the bridge plug can be completely dissolved by the electrolyte-containing solution which can be synchronously fed and can be dissolved at the bottom layer of the bridge plug, and after the bridge plug is dissolved, the shaft reaches the full drift diameter, so that the operability of various operations at the later stage of the oil-gas well is improved.
To sum up, the utility model provides a can send soluble bridge plug of ball in step is applied to oil gas well fracturing production increase operation field, can reduce operating cost and risk effectively to because its simple structure is compact, easily manufacturing has reduced soluble bridge plug cost effectively.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but the limitation of the patent scope of the present invention can not be understood thereby. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the present invention, and therefore, the scope of the present invention should be determined by the appended claims.
Claims (10)
1. The soluble bridge plug capable of synchronously feeding balls is characterized by comprising a central tube (1), wherein the central tube (1) is of an axial hollow structure, and a fracturing ball (2), a cone (3), a slip (4) and a guide shoe (5) are sequentially arranged on the outer circumference of the central tube (1) from top to bottom;
the fracturing ball (2) is connected with the upper end of the central pipe (1) in a sealing manner, the lower end of the cone (3) is connected with the upper end of a slip (4), and the lower end of the slip (4) is connected with the upper end of a guide shoe (5);
the upper end of the central tube (1) is provided with a hand-off shearing screw hole (11), and the lower end of the central tube is provided with connecting threads.
2. The soluble bridge plug capable of synchronously sending balls is characterized in that a shearing pin hole (31) is formed in the upper end of the cone (3), a sealing ring (32) is arranged in an inner hole of the cone (3), and a sealing assembly (6) is arranged at the joint of the cone (3) and the slips (4).
3. The synchronizable ball feed soluble bridge plug according to claim 2, wherein the seal assembly (6) comprises a seal retainer ring (61), a seal ring (62), a first seal support ring (63), a second seal support ring (64) and a third seal support ring (65) in this order;
a sealing clamping ring (631) and a first notch (632) are arranged on the first sealing support ring (63), a second notch (641) is arranged on the second sealing support ring (64), and a third notch (651) is arranged on the third sealing support ring (65);
the first notch (632), the second notch (641) and the third notch (651) are arranged in a staggered mode of 120 degrees.
4. The synchronously ball-feeding soluble bridge plug as claimed in claim 3, wherein the angle formed by the upper ends of the sealing retainer ring (61) and the sealing ring (62) and the axial direction is 30 degrees, and the sealing retainer ring (61) covers the outer circular surface of the upper end of the sealing ring (62).
5. A soluble bridge plug for synchronous ball feeding according to claim 3, characterized in that the angle of the taper of the outer surface of the cone (3) with the axial direction is minus 5-10 degrees, and the angle of the inner surface of the sealing ring (62) with the axial direction is plus 5-10 degrees.
6. A soluble bridge plug capable of synchronously sending balls according to claim 3, characterized in that the outer surface of the slips (4) is embedded with ceramic grains (41), and the angle formed by the axial direction of the ceramic grains (41) and the axial direction of the slips (4) is 75-80 degrees.
7. A synchronous ball feed soluble bridge plug according to claim 6, wherein the height of the ceramic grains (41) protruding the slips (4) is less than the height of the sealing ring (62) protruding the slips (4).
8. The synchronously feedable soluble bridge plug of claim 1, wherein said guide shoe (5) is provided with a flow-through groove (51).
9. The synchronously sending soluble bridge plug of claim 1, characterized in that the upper end of the slip (4) is provided with a first open slot (42), and the lower end of the first open slot (42) is drilled with a first stress release hole; the lower end of the slip (4) is provided with a second open slot (43), a second stress release hole is drilled at the upper end of the second open slot (43), and the first open slot (42) and the second open slot (43) are uniformly arranged on the slip (4) at intervals.
10. The soluble bridge plug capable of synchronously sending balls is characterized in that the inner surface of the lower end of the slip (4) is provided with an inner clamping groove, and the outer surface of the upper end of the guide shoe (5) is provided with an outer clamping groove matched with the inner clamping groove;
and a clutch groove (44) is formed in the end face of the lower end of the slip (4), and a clutch convex groove (52) matched with the clutch groove (44) is formed in the outer end face of the upper end of the guide shoe (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921584430.7U CN210530797U (en) | 2019-09-23 | 2019-09-23 | Soluble bridge plug capable of synchronously feeding balls |
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| CN201921584430.7U CN210530797U (en) | 2019-09-23 | 2019-09-23 | Soluble bridge plug capable of synchronously feeding balls |
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| CN112324934A (en) * | 2020-10-12 | 2021-02-05 | 上海自动化仪表有限公司 | Valve with carbon graphite sealing ring |
| CN112523721A (en) * | 2020-12-21 | 2021-03-19 | 陈爱民 | Sealing assembly for dissolvable bridge plug, dissolvable bridge plug and method for sealing gap |
| CN112761606A (en) * | 2021-01-26 | 2021-05-07 | 西安费诺油气技术有限公司 | FDC all-metal soluble fracturing nipple |
| CN113389518A (en) * | 2021-06-16 | 2021-09-14 | 江苏非常规能源科技发展有限公司 | Soluble bridge plug and interlayer plugging system |
| CN113464088A (en) * | 2021-04-22 | 2021-10-01 | 杰瑞能源服务有限公司 | Dissolvable bridge plug and downhole tool |
| CN113719253A (en) * | 2021-09-16 | 2021-11-30 | 重庆贝斯特石油科技有限公司 | Metal sealing dissoluble bridge plug |
| CN116163684A (en) * | 2023-04-15 | 2023-05-26 | 西南石油大学 | Shale gas sleeve variable well staged fracturing soluble bridge plug with outer diameter of 75mm and 114.3mm after expansion |
| CN117090535A (en) * | 2022-05-11 | 2023-11-21 | 大庆油田有限责任公司 | Metal seal assembly suitable for shale oil reservoir environment |
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- 2019-09-23 CN CN201921584430.7U patent/CN210530797U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112324934A (en) * | 2020-10-12 | 2021-02-05 | 上海自动化仪表有限公司 | Valve with carbon graphite sealing ring |
| CN112523721A (en) * | 2020-12-21 | 2021-03-19 | 陈爱民 | Sealing assembly for dissolvable bridge plug, dissolvable bridge plug and method for sealing gap |
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