CN114809980A - Hydraulic temporary bridge plug - Google Patents
Hydraulic temporary bridge plug Download PDFInfo
- Publication number
- CN114809980A CN114809980A CN202210402039.0A CN202210402039A CN114809980A CN 114809980 A CN114809980 A CN 114809980A CN 202210402039 A CN202210402039 A CN 202210402039A CN 114809980 A CN114809980 A CN 114809980A
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- China
- Prior art keywords
- ring
- pipe
- assembly
- central
- cone
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
Abstract
A hydraulic temporary plugging bridge plug relates to the technical field of oil field downhole tools, is used for temporary packer interval, water plugging and testing, and is matched with a packer to be used in measure operations such as acidizing and fracturing. The fishing device comprises a setting assembly, a recovery assembly, a fishing assembly, a central assembly, a sealing assembly and an anchoring assembly. The invention relates to a setting assembly, which is used for continuously drilling and fishing assemblies in a thread mode, wherein the upper part of the setting assembly is connected with a whole set of pipe columns through pipe threads, the recovery assembly is a recovery device tool of the whole set of tool and catches and recovers the tool along with the pipe columns after completing tasks, the fishing tool assembly is sleeved outside the setting assembly by taking a center assembly as an axis, the center assembly is a whole tool and bears acting force brought in various directions, the sealing assembly is a whole tool sealing item, and the pipe columns are sealed by compression and expansion of a rubber sleeve.
Description
Technical Field
The invention belongs to the field of oil field downhole tools, and particularly relates to a hydraulic temporary plugging bridge plug for a continuous oil pipe.
Background
The temporary plugging of the bottom of the high-pressure well of the coiled tubing in the oil field is very important plugging operation, serious blowout can be caused due to poor plugging, the well head needs to be kept still for 3-7 days after the conventional coiled tubing fracturing operation, the well head is replaced for conventional operation when the pressure is weakened, the time cost and the production cost are also increased along with the time proportion, and meanwhile, the later-stage production yield is also reduced due to the weakening of the pressure, so the invention solves the problems.
Disclosure of Invention
The invention provides a hydraulic type temporary plugging bridge plug for a continuous oil pipe, which aims to solve the problems of well head replacement, yield increase and the like in the conventional continuous oil pipe fracturing process.
The technical scheme provided by the invention is as follows: a hydraulic temporary bridge plug comprises a bridge plug body, a bridge plug delivery tool and a bridge plug recovery tool; the bridge plug body comprises a central component, a fishing component, a sealing component and an anchoring component;
the central component comprises a release bolt, a top plug, an upper balance pipe, a lower balance pipe, an upper central pipe, an elastic lock ring B, a guide screw, a lower connecting pipe, a lower central pipe, an elastic lock ring C and a retainer ring, wherein the lower end of the release bolt is in threaded connection with the top plug, the outer side of the top plug is in threaded sealing connection with the upper central pipe, the upper balance pipe is inserted into the inner side of the upper central pipe in a clearance manner, the lower balance pipe is in threaded connection with the lower end of the upper balance pipe, the middle lower part of the lower balance pipe extends out of the upper central pipe, the lower connecting pipe is in threaded connection with the retainer ring into an integral structure and is sleeved on the outer side of the lower part of the lower balance pipe, the elastic lock ring C is bidirectionally limited and arranged between the lower connecting pipe and the retainer ring, the outer side of the middle lower part of the lower balance pipe is provided with obliquely upward unidirectional teeth, the inner side of the elastic lock ring C is engaged with the unidirectional teeth on the outer side of the lower balance pipe, so as to limit the lower balance pipe from ascending relative to the elastic lock ring C, the lower central pipe is positioned on the outer side of the whole body formed by the lower connecting pipe and the retainer ring, the side wall of the lower connecting pipe is provided with an axial long hole, a guide pin is fixedly arranged on the lower central pipe, the guide pin extends into the long hole of the lower connecting pipe to limit the vertical axial displacement distance of the lower central pipe, the outer side of an elastic lock ring B is meshed with the lower central pipe through deep teeth, a gap is reserved between the outer side of the elastic lock ring B and the lower central pipe, the gap is smaller than the tooth depth of the deep teeth, so that the central pipe can limit the elastic lock ring B in a two-way mode, the outer side of the middle upper part of the lower connecting pipe is provided with downward inclined one-way shallow teeth, the inner side of the elastic lock ring B is meshed with the outer side of the lower connecting pipe through the shallow teeth, and the elastic lock ring B is limited to move upwards relative to the lower connecting pipe;
the fishing assembly comprises a valve body, a limit screw A, a recovery neck, a release pin, a valve cover and a connecting key, wherein the valve body is hermetically sleeved outside an upper central tube, the upper part of a top plug of the central assembly is provided with a step, the limit screw is installed on the valve body, the end part of the limit screw abuts against the step of the top plug so as to limit the downward displacement of the central assembly, the recovery neck is hermetically sleeved outside the valve body, the upper part of the recovery neck is connected with the valve body through the anti-drop pin, the valve cover is positioned between the recovery neck and the valve body, the valve cover is in threaded sealing connection with the recovery neck, the valve cover is in sliding sealing fit with the valve body, the middle part of the valve body is provided with an axial long hole, one end of the connecting key is connected with the valve cover, and the other end of the connecting key penetrates through the long hole in the valve body and the long hole in the upper central tube and then is connected with an upper balance tube of the central assembly;
the sealing assembly comprises an adjusting ring, an upper rubber cylinder, a spacer ring A, a lower rubber cylinder, a bushing, a guide ring and an elastic locking ring A, the bushing is sleeved outside the upper central tube, the inner side of the upper end of the bushing is in threaded connection with a valve body of the fishing assembly, the outer side of the upper end of the bushing is in threaded connection with the adjusting ring, the lower end of a valve cover of the fishing assembly is abutted against the upper end of the adjusting ring, the upper rubber cylinder, the spacer ring A, the lower rubber cylinder and the guide ring are all sleeved on the bushing, the guide ring can slide relative to the bushing, a gap is reserved between the inner side of the lower end of the bushing and the elastic locking ring A through deep tooth meshing, and the gap is smaller than the tooth depth of the deep teeth, the bushing is used for bidirectionally limiting the elastic locking ring A, the bushing and the elastic locking ring A are locked through the anti-rotation pin B, the middle lower section of the outer side of the upper central tube is provided with a downward inclined unidirectional locking tooth, and the inner side of the elastic locking ring A is meshed with the unidirectional locking tooth on the outer side of the upper central tube so as to limit the elastic locking ring A to move upwards relative to the upper central tube;
the anchoring assembly comprises an upper cone, a slip hanger, a limiting pin B, a slip, a return spring, a pawl body, a lower cone, a release pin, a nut, a pawl sleeve and a spacer ring B; the pawl body is connected with the lower end of the upper central tube in a threaded manner and is provided with an anti-rotation pin A, the upper end of the upper cone body is connected with the guide ring of the sealing component, the lower end of the upper cone body is matched with the slip hanger, the diameter size of an inner hole of the slip hanger is limited, an upper cone cannot be separated from the slip hanger, the lower end of the slip hanger is matched with the upper end of a lower cone, the lower end of the slip hanger is connected with a nut in a threaded mode, the lower end of the slip hanger is an upper cone and a lower cone, the cone is limited by the inner diameter size of the nut after entering, the lower cone can slide out, the upper cone and the lower cone are both sleeved outside a pawl body, the slip is placed in the space between the upper cone, the lower cone, the pawl body and the slip hanger, the upper cone, the lower cone and the slip are matched with each other in a conical surface mode, a return spring is arranged between the slip hanger and gives radial displacement resilience force to the slip, the lower end of the lower cone is connected with a pawl sleeve in a threaded mode, a spacer ring B is placed between the lower cone and the pawl sleeve, and the pawl body is connected with a lower center tube through a release pin;
the bridge plug delivery tool comprises a delivery upper joint, a retaining ball, a sleeve, a central rod, a thrust piston, a centering sleeve and a distance adjusting ring; the sleeve is sleeved outside the upper delivery joint, a fixing ring is connected to the upper delivery joint above the sleeve in a threaded manner, so that the sleeve is limited from axially displacing relative to the upper delivery joint, the central rod is connected to the inner side of the upper delivery joint, the thrust piston is sealed between the sleeve and the central rod in a sliding manner, the distance adjusting ring is located at the lower end of the sleeve, the lower end of the central rod is in threaded connection with a release bolt of the central component, a ball seat is arranged at the upper part of the upper delivery joint, a blocking ball is located in the ball seat and is in sealing fit with the ball seat, and the upper delivery joint at the periphery of the ball seat is provided with an axial pressure transmission through hole so as to guide hydraulic pressure to the upper part of the thrust piston;
the bridge plug recovery tool comprises a salvaging upper joint, a connecting sleeve, a recovery slip and a guide shoe; salvage the top connection, the adapter sleeve, the guide shoe is threaded connection in proper order from top to bottom, retrieve the slips setting in the inboard of adapter sleeve, it is spacing through salvaging the top connection to retrieve the slips upper end, it is spacing through the guide shoe to retrieve the slips lower extreme, it has oblique ascending one-way spacing tooth to retrieve the slips inboard, the recovery neck upper end outside of bridging plug body has and retrieves the one-way spacing tooth of slips and mesh mutually and be the tooth, it is down that the slips is retrieved relatively to retrieve the slips restriction bridging plug body after the two meshes.
The invention has the beneficial effects that:
(1) after the sealing device is seated, the outer side of the sealing device is sealed by the rubber cylinder, the inner side of the sealing device is sealed by the top plug and the O-shaped sealing ring, and the inner and outer sealing is uniform and reliable; the elasticity of packing element is through the one-way spacing screw locking of balanced pipe down, does not act on the round pin nail of deblocking, thereby this thread length is longer can effectively prevent that the packing element from kick-backing and making the packing element sealed more reliable, and inside top stopper screw thread is equipped with O shape sealing washer and seals, and the less stress area of top stopper basal area is more big then bearing pressure more, so even if the well pressure is great, the instrument shutoff still is very reliable.
(2) After the invention is sealed, the ratchet elastic lock ring A keeps the sealing load, the reliable sealing can be ensured under the pressure change, and the bidirectional slip is anchored to bear the pressure difference between the upper part and the lower part.
(3) The bridge plug delivery tool is provided with a backwashing channel, and can be normally used when the tool is lowered and needs a backwashing function.
(4) When the fishing tool is used for fishing, the method of lowering the pipe column by carrying the tool can smoothly realize butt joint, unsealing and lifting at one time, the oil pipe is lifted, the bypass valve is firstly opened to balance the up-down pressure of the bridge plug, the unsealing is easier, and the fishing can be smoothly realized.
Drawings
Fig. 1 is a schematic structural view before setting of the invention.
Fig. 2 is a schematic structural view of the present invention in setting.
FIG. 3 is a schematic diagram of the structure after deblocking according to the present invention.
Fig. 4 is a schematic structural diagram during fishing of the invention.
FIG. 5 is a schematic view of the present invention in a delivery configuration.
Fig. 6 is a schematic structural view of a bridge plug delivery tool of the present invention.
FIG. 7 is a schematic view of the construction of the bridge plug recovery tool of the present invention.
FIG. 8 is a schematic view of the fishing assembly of the present invention.
Fig. 9 is a schematic view of the structure of the center module in the present invention.
Fig. 10 is a schematic view of the seal assembly of the present invention.
FIG. 11 is a schematic view of the anchor assembly of the present invention.
In the figure: 1. releasing the plug releasing diameter; 2. releasing the plug; 3. a valve body; 4. a limit pin; 5. a top plug; 6. an O-shaped sealing ring I; 7. an O-shaped sealing ring II; 8. recovering the neck; 9. anti-drop pins; 10. an O-shaped sealing ring III; 11. a valve cover; 12. a connecting bond; 13. an upper balance pipe; 14. an O-shaped sealing ring IV; 15. an O-shaped sealing ring V; 16. an adjustment ring; 17. an O-shaped sealing ring VI; 18. gluing a rubber cylinder; 19. a spacer ring; 20. a rubber cylinder is arranged; 21. a bushing; 22. a guide ring; 23. an elastic locking ring A; 24. an anti-rotation pin A; 25. a lower balance tube; 26. an upper center tube; 27. an upper cone; 28. hanging slips; 29. an anti-rotation pin B; 30. slips; 31. a return spring; 32. a pawl body; 33. a lower cone; 34. releasing the pin; 35. an elastic locking ring B; 36. a nut; 37. a guide screw; 38. a lower connecting pipe; 39. a lower center tube; 40. a pawl sleeve; 41. a spacer ring B; 42. an elastic locking ring C; 43. a retainer ring; 44. delivering an upper joint; 45. blocking the ball; 46. a fixing ring; 47. a sleeve; 48. a center pole; 49. a thrust piston; 50. a centralizing sleeve; 51. adjusting distance ring; 52. fishing the upper joint; 53. connecting sleeves; 54. recovering slips; 55. a guide shoe.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, 6 and 7, the invention is divided into a bridge plug body, a bridge plug delivery tool and a bridge plug recovery tool from a large module.
More specifically, the bridge plug body comprises a fishing assembly, a center assembly, a sealing assembly and an anchoring assembly. The specific structure and function of each component and each tool is detailed below.
As shown in fig. 9, the whole body formed by the upper balance pipe 13 and the lower balance pipe 25 of the center assembly through threaded connection is positioned in the upper center pipe 26, the upper end of the upper center pipe 26 is connected with the top plug 5 through threaded connection and is sealed through an O-ring seal i 6, the top plug 5 is connected with the release bolt 2 through threaded connection, the middle lower part of the lower balance pipe 25 extends out of the upper center pipe 26, the lower connecting pipe 38 is connected with a baffle ring 43 through threaded connection into a whole structure and is sleeved outside the lower part of the lower balance pipe 25, an elastic locking ring C42 is limited between the lower connecting pipe 38 and the baffle ring 43 in a two-way manner, the outer side of the middle lower part of the lower balance pipe 25 is provided with an upward one-way tooth, the inner side of the elastic locking ring C42 is engaged with the one-way tooth outside the lower balance pipe 25 to limit the lower balance pipe 25 from moving upward relative to the elastic locking ring C42, the lower center pipe 39 is positioned outside the whole body formed by the lower connecting pipe 38 and the baffle ring 43, the side wall of the lower connecting pipe 38 is provided with an axial long hole, the guide pin 37 is fixedly installed on the lower center tube 39, the inner side of the guide pin 37 extends into the long hole of the lower connecting tube 38 to limit the vertical axial displacement distance of the lower center tube 39, the outer side of the elastic lock ring B35 is meshed with the lower center tube 39 through deep teeth, a gap exists between the outer side of the elastic lock ring B35 and the lower center tube 39, the gap is smaller than the tooth depth of the deep teeth, therefore, the lower center tube 39 can limit the elastic lock ring B35 in two directions, the elastic lock ring B35 is prevented from being separated from the lower center tube 39, the outer side of the middle upper part of the lower connecting tube 38 is provided with downward inclined one-way shallow teeth, the inner side of the elastic lock ring B35 is meshed with the outer side of the lower connecting tube 38 through the shallow teeth, and the gap is larger than the tooth depth of the shallow teeth, so that only the upward movement of the elastic lock ring B35 relative to the lower connecting tube 38 can be limited.
As shown in fig. 8, the valve body 3 of the fishing assembly is hermetically sleeved outside the upper central pipe 26, the upper part of the top plug 5 of the central assembly is provided with a step, the limit screw 4 is installed on the valve body 3, the end part of the limit screw 4 is abutted against the step of the top plug 5, thereby limiting the downward displacement of the central component, the recovery neck 8 is sleeved outside the valve body 3 in a sealing way, an O-shaped II 7 is arranged between the two, the upper part of the recovery neck 8 is connected with the valve body 3 through an anti-drop pin 9, the valve cover 11 is positioned between the recovery neck 8 and the valve body 3, the outer side of the valve cover 11 is connected with the recovery neck 8 in a sealing way through screw threads, the valve cover 11 is in sealing fit with the valve body 3 through an O-shaped sealing ring V15, an axial long hole is formed in the middle of the valve body 3, one end of a connecting key 12 is connected with the valve cover 11, and the other end of the connecting key 12 penetrates through the long hole in the valve body 3 and the long hole in the upper central pipe 26 and then is connected with the upper balance pipe 13.
As shown in fig. 10, the sealing assembly is disposed at the upper end of the central portion of the whole tool, a bushing 21 is sleeved outside an upper central tube 26, the inner side of the upper end of the bushing 21 is in threaded connection with a valve body 3 of a fishing assembly, an O-ring vi 17 is disposed at the joint of the bushing and the valve body, the outer side of the upper end of the bushing 21 is in threaded connection with an adjusting ring 16, the lower end of a valve cover 11 of the fishing assembly abuts against the upper end of the adjusting ring 16, an upper rubber barrel 18, a spacer ring a19, a lower rubber barrel 20 and a guide ring 22 are all sleeved on the bushing 21, the guide ring 22 can slide relative to the bushing 21, a gap exists between the inner side of the lower end of the bushing 21 and an elastic locking ring a23 through deep tooth engagement, the gap is smaller than the depth of the deep tooth, so that the bushing 21 can bidirectionally limit the elastic locking ring a23, the bushing 21 and the elastic locking ring a23 are locked by an anti-rotation pin B24, a lower section of the outer side of the upper central tube 26 has a shallow locking tooth which is inclined downward, the inner side of the elastic locking ring a23 is engaged with a shallow locking tooth of the upper central tube 26, the clearance height is greater than the height of the shallow locking teeth to limit upward movement of the resilient locking ring a23 relative to the upper center tube 26.
As shown in fig. 11, the anchoring assembly is located at the lowest end of the whole tool, the pawl body 32 is connected to the lower end of the upper central tube 26 in a threaded manner and is provided with an anti-rotation pin a34, the upper end of the upper cone 27 is connected to the guide ring 22 of the sealing assembly, the lower end of the upper cone 27 is matched with the slip hanger 28 and is limited by the diameter of the inner hole of the slip hanger 28, the lower end of the slip hanger 28 is matched with the upper end of the lower cone 33, the lower end of the slip hanger 28 is connected with the nut 36 in a threaded manner, the lower end of the slip hanger 28 is an inlet of the upper cone 27 and the lower cone 33, the cone is limited by the inner diameter of the nut 36 after entering, the lower cone 33 slides out, the upper cone 27 and the lower cone 33 are both sleeved outside the pawl body 32, the slip 30 is placed in the space between the upper cone 27, the lower cone 33, the pawl body 32 and the slip hanger 28, the conical surfaces of the upper cone 27 and the slip 30 are matched with each other, the return spring 31 is arranged between the slip 30 and the slip hanger 28 to give a radial displacement resilience force to the slip 30, the lower end of the lower cone 33 is connected with the pawl sleeve 40 in a threaded mode, a spacer ring B41 is arranged between the lower cone 33 and the pawl sleeve 40, and the pawl body 32 is connected with the lower central tube 39 through a release pin 34.
As shown in fig. 6, the bridge plug delivery tool comprises a delivery upper joint 44, a ball retainer 45, a fixing ring 46, a sleeve 47, a central rod 48, a thrust piston 49, a centering sleeve 50 and a distance adjusting ring 51, wherein the sleeve 47 is hermetically sleeved on the delivery upper joint 44 and fixed by the fixing ring 46, the central rod 48 is in threaded connection with the internal thread of the delivery upper joint 44, the thrust piston 49 is arranged between the central rod 48 and the sleeve 47, in the initial delivery state, the centering sleeve 50 is sleeved on the outer end of the recovery neck 8, the outer step of the centering sleeve 50 abuts against the lower end of the thrust piston 49, the distance adjusting ring 51 is in threaded connection with the lower end of the sleeve 47 and is in threaded connection with the adjusting ring 16, the delivery upper joint 44 is provided with a ball seat, the ball retainer 45 is positioned in the ball seat and is in sealed connection with a ball seat, the delivery upper joint 44 below the ball seat is provided with a radial backwashing well hole, the delivery upper joint 44 on the periphery of the ball seat is provided with an axial pressure transmitting through hole, the radial backwash wells are spaced from axial pressure transfer through holes which direct hydraulic pressure above the thrust piston 49.
As shown in fig. 7, the bridge plug recovery tool includes a recovery top sub 52, a connecting sleeve 53, a recovery slip 54, and a guide shoe 55. Salvage top connection 52, adapter sleeve 53, the screw thread connection in proper order from top to bottom of guide shoe 55, retrieve slips 54 and set up the inboard at adapter sleeve 53, adapter sleeve 53 restriction is retrieved slips 54 and is expanded mouthful, it is spacing through salvage top connection 52 to retrieve slips 54 upper end, it is spacing through guide shoe 55 to retrieve slips 54 lower extreme, it has ascending spacing tooth to retrieve slips 54 inboard, it is the tooth to have the spacing tooth that is engaged with retrieving slips 54 in the recovery neck 8 upper end outside of bridging plug body, retrieve slips 54 restriction bridging plug body after the two meshes and retrieve slips 54 down relatively, the design of ratchet makes the instrument axial downwards snatch more easily, the axial upwards can't throw off and drop, the guide shoe 55 lower extreme is equipped with the more convenient catching tool of big tapering.
The setting process of the invention comprises the following steps: after the invention is put down the well together with a bridge plug delivery tool figure 7 (the connection mode is shown in figure 5) to reach a designated position, along with the injection of liquid, the liquid reaches the upper part of a thrust piston 49 through a pressure transmission through hole in the axial direction of a delivery upper joint 44, the thrust piston 49 is pushed to descend, and a centering sleeve 50, a contraction diameter 8, a valve cover 11, a sealing assembly and an anchoring assembly are sequentially pushed to descend through the transmission of force. The setting resilience in this case acts on the teeth between the elastic locking ring a23 and the upper central tube 26 on the one hand and between the spacer ring B41 and the ratchet body 32 on the other hand, and it can be seen that the setting resilience of the present invention is not locked by the setting shear and therefore the setting anchoring is more reliable. The upper balance pipe 13 and the lower balance pipe 25 also descend along with the descending of the valve cover 11 during setting, so that the upper balance pipe 13 and the lower balance pipe 15 reach the positions shown in fig. 2.
Releasing the bridge plug: after the bridge plug is anchored and sealed, the thrust piston 49 is pushed continuously, at the moment, a pulling force is formed between the downward pushing force and the pipe column, the pulling force acts on the releasing bolt releasing diameter 1, when the tensile strength is greater than the tensile strength of the releasing bolt releasing diameter 1, the releasing bolt releasing diameter 1 is broken, the pipe column is lifted up to recover the bridge plug delivery tool, and the tool releasing is completed.
After the tool is seated, due to the design of the two sets of one-way limiting mechanisms, the tool is guaranteed to be tightly seated and reliably anchored, the reliability of external sealing is guaranteed due to the design of the double rubber cylinders, the internal sealing is sealed by adopting a multi-section O-shaped sealing ring matched with the tool in size, a smaller liquid contact area is designed in the tool, higher pressure can be borne, and the sealing performance and stability of the tool are guaranteed.
The deblocking process of the invention: when the bridge plug recovery tool is put into the well, the conical surface of the guide shoe 55 is guided into the bridge plug to enable the ratchet teeth of the recovery slips 54 to hook the ratchet teeth outside the recovery neck 8, after the bridge plug recovery tool is stably combined with the bridge plug, in figure 4, the recovery neck 8 is lifted by the tool to drive the valve cover 11, the valve cover 11 drives the upper balance pipe 13 to move upwards through the connecting key 12, the upper balance pipe 13 drives the lower balance pipe 25, the balance pipe 25 drives the elastic locking ring C42 to push the lower connecting sleeve 38 to move upwards due to the ratchet relation of the elastic locking ring C42, the lower central pipe 39 is pushed to displace when the outer diameter of the lower connecting sleeve 38 contacts the inner diameter of the lower central pipe 39, the lower central pipe 39 pushes the pawl body 32, the pawl of the pawl body 32 is cut due to anchoring relation, the lifting action force cannot be recovered due to the outer diameter limit of the lower central pipe 39 acts on the position of the release pin 34, when the pin is cut when the lifting force is larger than the shearing force of the release pin 34, the pawl body 39 continuously moves upwards to allow the pawl body 32 to recover the pawl space, and continuously lifting the pawl to recover, moving the spacer ring B41 downwards to the lower end of the pawl body 32, enabling the pawl body 32 not to lose the function when working, enabling the lower cone 33 to drive the slip hanger 28 to move downwards by gravity, enabling the upper end of the slip hanger 28 to be hung outside the upper cone 27 and simultaneously pulling the guide ring 22 to move downwards, enabling the upper end of the upper end valve cover 11 to abut against the step of the valve body 2 to drive the lining 21 to move upwards, forming a pulling force up and down to pull the guide ring 22 to release a rubber cylinder release space, and unsealing the rubber cylinder recovery tool. Due to the fact that the elastic lock ring A23 and the elastic lock ring B35 are matched with corresponding parts in the design of external ratchets, the two one-way limiting mechanisms enable the tool anchoring assembly and the sealing assembly to be in secondary setting and secondary anchoring after anchoring and unsealing are relieved, the tool is guaranteed not to be in secondary setting and secondary anchoring, the tool is guaranteed to be recovered safely, well blocking is prevented, the bridge plug can be separated from the recovery tool through a forward rotation mode after coming along with the recovery tool, and the bridge plug recovery tool is enabled to be continuously used.
In conclusion, after anchoring and setting, the ratchet-shaped threads in the tool are designed and matched with the ratchets at all parts, so that the anchoring safety and the sealing reliability can be fully ensured, the tool can not be set for the second time when being recovered, the recovery safety of the tool can be ensured, and meanwhile, the bridge plug delivery tool and the bridge plug recovery tool can be repeatedly used, so that the time and the economic cost are saved.
Claims (4)
1. A hydraulic temporary bridge plug is characterized in that: the bridge plug recycling tool comprises a bridge plug body, a bridge plug delivering tool and a bridge plug recycling tool; the bridge plug body comprises a central component, a fishing component, a sealing component and an anchoring component;
the central component comprises a release bolt (2), a top plug (5), an upper balance pipe (13), a lower balance pipe (25), an upper central pipe (26), an elastic lock ring B (35), a guide screw (37), a lower connecting pipe (38), a lower central pipe (39), an elastic lock ring C (42) and a retainer ring (43), the lower end of the release bolt (2) is in threaded connection with the top plug (5), the outer side of the top plug (5) is in threaded sealing connection with the upper central pipe (26), the upper balance pipe (13) is inserted into the inner side of the upper central pipe (26) in a clearance manner, the lower balance pipe (25) is in threaded connection with the lower end of the upper balance pipe (13), the middle lower part of the lower balance pipe (25) extends out of the upper central pipe (26), the lower connecting pipe (38) and the retainer ring (43) are in an integral structure in a threaded connection manner and are sleeved on the outer side of the lower part of the lower balance pipe (25), the elastic lock ring C (42) is arranged between the lower connecting pipe (38) and the retainer ring (43) in a bidirectional limiting manner, the outer side of the middle lower part of the lower balance pipe (25) is provided with oblique upward unidirectional teeth, the inner side of an elastic locking ring C (42) is meshed with the unidirectional teeth on the outer side of the lower balance pipe (25) so as to limit the lower balance pipe (25) to move upwards relative to the elastic locking ring C (42), a lower central pipe (39) is positioned on the outer side of the whole body formed by a lower connecting pipe (38) and a check ring (43), the side wall of the lower connecting pipe (38) is provided with an axial long hole, a guide pin (37) is fixedly arranged on the lower central pipe (39), the guide pin (37) extends into the long hole of the lower connecting pipe (38) so as to limit the vertical axial displacement distance of the lower central pipe (39), the outer side of an elastic locking ring B (35) is meshed with the lower central pipe (39) through deep teeth, a gap is reserved between the outer side of the elastic locking ring B (35) and the lower central pipe (39), the gap is smaller than the tooth depth of the deep teeth, so that the central pipe (39) can limit the elastic locking ring B (35) in a two ways, the outer side of the middle upper part of the lower connecting pipe (38) is provided with oblique downward unidirectional shallow teeth, the inner side of the elastic locking ring B (35) is meshed with the outer side of the lower connecting pipe (38) through shallow teeth, so that the elastic locking ring B (35) is limited to move upwards relative to the lower connecting pipe (38);
the fishing assembly comprises a valve body (3), a limiting screw A (4), a recovery neck (8), a release pin (9), a valve cover (11) and a connecting key (12), the valve body (3) is hermetically sleeved outside an upper central tube (26), the upper part of a top plug (5) of the central assembly is provided with a step, the limiting screw (4) is installed on the valve body (3), the end part of the limiting screw (4) is abutted against the step of the top plug (5) so as to limit the downward displacement of the central assembly, the recovery neck (8) is hermetically sleeved outside the valve body (3), the upper part of the recovery neck (8) is connected with the valve body (3) through an anti-falling pin (9), the valve cover (11) is positioned between the recovery neck (8) and the valve body (3), the valve cover (11) is in threaded sealing connection with the recovery neck (8), the valve cover (11) is in sliding sealing fit with the valve body (3), and the middle part of the valve body (3) is provided with an axial long hole, one end of a connecting key (12) is connected with the valve cover (11), and the other end of the connecting key (12) passes through a long hole in the valve body (3) and a long hole in the upper central pipe (26) and then is connected with an upper balance pipe (13) of the central component;
the sealing assembly comprises an adjusting ring (16), an upper rubber cylinder (18), a spacer ring A (19), a lower rubber cylinder (20), a bushing (21), a guide ring (22) and an elastic locking ring A (23), the bushing (21) is sleeved outside an upper central tube (26), the inner side of the upper end of the bushing (21) is in threaded connection with a valve body (3) of the fishing assembly, the outer side of the upper end of the bushing (21) is in threaded connection with the adjusting ring (16), the lower end of a valve cover (11) of the fishing assembly is abutted against the upper end of the adjusting ring (16), the upper rubber cylinder (18), the spacer ring A (19), the lower rubber cylinder (20) and the guide ring (22) are all sleeved on the bushing (21), the guide ring (22) can slide relative to the bushing (21), a gap is formed between the inner side of the lower end of the bushing (21) and the elastic locking ring A (23) through deep tooth meshing, and is smaller than the tooth depth of the deep teeth, so that the bushing (21) can bidirectionally limit the elastic locking ring A (23), the bushing (21) and the elastic locking ring A (23) are locked through an anti-rotation pin B (24), the middle lower section of the outer side of the upper central tube (26) is provided with a downward inclined one-way locking tooth, and the inner side of the elastic locking ring A (23) is meshed with the one-way locking tooth on the outer side of the upper central tube (26) so as to limit the upward movement of the elastic locking ring A (23) relative to the upper central tube (26);
the anchoring assembly comprises an upper cone (27), a slip hanger (28), a limiting pin B (29), a slip (30), a return spring (31), a pawl body (32), a lower cone (33), a release pin (34), a nut (36), a pawl sleeve (40) and a spacer ring B (41); the ratchet body (32) is in threaded connection with the lower end of the upper central tube (26) and is provided with an anti-rotation pin A (37), the upper end of the upper cone (27) is connected to a guide ring (22) of the sealing assembly, the lower end of the upper cone is matched with the slip hanger (28), the diameter of the inner hole of the slip hanger (28) is limited, the upper cone (27) cannot be separated from the slip hanger (28), the lower end of the slip hanger (28) is matched with the upper end of the lower cone (33), the lower end of the slip hanger (28) is in threaded connection with a nut (36), the lower end of the slip hanger (28) is an upper cone (27) and a lower cone (33), the lower cone (33) is limited by the inner diameter of the nut (36) after entering the cone, the upper cone (27) and the lower cone (33) are sleeved outside the ratchet body (32), the upper cone (28), the lower cone (33), the slip hanger (30) is placed in the space between the ratchet body (32) and the slip hanger (28), the upper cone (28), The lower cone (33) is matched with the slips (30) through conical surfaces, the return spring (31) is arranged between the slips (30) and the slip hanger (28) and gives a radial displacement resilience force to the slips (30), the lower end of the lower cone (33) is in threaded connection with the pawl sleeve (40), the spacer ring B (41) is placed between the lower cone (33) and the pawl sleeve (40), and the pawl body (32) is connected with the lower central tube (39) through the release pin (34);
the bridge plug delivery tool comprises a delivery upper joint (44), a stop ball (45), a sleeve (47), a central rod (48), a thrust piston (49), a centering sleeve (50) and a distance adjusting ring (51); the sleeve (47) is sleeved on the outer side of the upper delivery joint (44), a fixing ring (46) is connected to the upper delivery joint (44) above the sleeve (47) in a threaded mode, so that the sleeve (47) is limited from axially displacing relative to the upper delivery joint (44), the central rod (48) is connected to the inner side of the upper delivery joint (44), the thrust piston (49) is sealed between the sleeve (47) and the central rod (48) in a sliding mode, the distance adjusting ring (51) is located at the lower end of the sleeve (47), the lower end of the central rod (48) is connected with the release bolt (2) of the central assembly in a threaded mode, the upper delivery joint (44) is provided with a ball seat, the blocking ball (45) is located in the ball seat and is matched with the ball seat in a sealing mode, and the upper delivery joint (44) on the periphery of the ball seat is provided with an axial pressure transmission through hole, so that hydraulic pressure is guided to the upper thrust piston (49);
the bridge plug recovery tool comprises a fishing upper joint (52), a connecting sleeve (53), a recovery slip (54) and a guide shoe (55); salvage top connection (52), adapter sleeve (53), guide shoe (55) threaded connection from top to bottom in proper order, it sets up the inboard at adapter sleeve (53) to retrieve slips (54), it is spacing through salvage top connection (52) to retrieve slips (54) upper end, it is spacing through guide shoe (55) to retrieve slips (54) lower extreme, it has oblique ascending one-way spacing tooth to retrieve slips (54) inboard, it is the tooth to have the one-way spacing tooth with retrieving slips (54) outside the recovery neck (8) upper end of bridging plug body to mesh mutually, retrieve slips (54) after the two meshing and restrict the bridging plug body and retrieve slips (54) relatively and descend.
2. The removable temporary bridge plug of claim 1, wherein: the bridge plug delivery tool further comprises a centering sleeve (50), the centering sleeve (50) is located below the thrust piston (49), the centering sleeve (50) is sleeved on the outer side of the recovery neck (8) in an initial state, and the upper end of the recovery neck (8) abuts against the centering sleeve (50).
3. The removable temporary bridge plug of claim 1, wherein: the bridge plug delivery tool further comprises a distance adjusting ring (51), the distance adjusting ring (51) is connected to the lower end of the sleeve (47) in a threaded mode, and the distance adjusting ring (51) is enabled to be abutted against the adjusting ring (16) in the initial state through threaded distance adjustment.
4. The removable temporary bridge plug of claim 1, wherein: the upper delivery connector (44) below the ball seat is provided with a radial backwashing well hole which is arranged at a distance from the axial pressure transmission through hole.
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| CN202210402039.0A CN114809980B (en) | 2022-04-19 | 2022-04-19 | Hydraulic temporary bridge plug |
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| CN202210402039.0A CN114809980B (en) | 2022-04-19 | 2022-04-19 | Hydraulic temporary bridge plug |
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| CN115749671A (en) * | 2023-01-06 | 2023-03-07 | 中石化西南石油工程有限公司 | Constant-pressure trapping and leaking stoppage tool and method for drilling |
| CN116658116A (en) * | 2023-07-31 | 2023-08-29 | 成都若克石油技术开发有限公司 | Packer for positioning perforation and use method |
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| CN115749671A (en) * | 2023-01-06 | 2023-03-07 | 中石化西南石油工程有限公司 | Constant-pressure trapping and leaking stoppage tool and method for drilling |
| CN116658116A (en) * | 2023-07-31 | 2023-08-29 | 成都若克石油技术开发有限公司 | Packer for positioning perforation and use method |
| CN116658116B (en) * | 2023-07-31 | 2024-01-30 | 成都若克石油技术开发有限公司 | Packer for positioning perforation and use method |
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| CN114809980B (en) | 2022-11-01 |
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