CN210343303U - Soluble bridge plug for staged fracturing - Google Patents
Soluble bridge plug for staged fracturing Download PDFInfo
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- CN210343303U CN210343303U CN201921311669.7U CN201921311669U CN210343303U CN 210343303 U CN210343303 U CN 210343303U CN 201921311669 U CN201921311669 U CN 201921311669U CN 210343303 U CN210343303 U CN 210343303U
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Abstract
The utility model discloses a segmented fracturing soluble bridge plug, which is made of soluble materials and comprises a central tube, the central tube is sequentially sleeved with a slip push ring, an upper slip, an upper cone, an upper rubber cylinder, an upper spacer ring, a middle rubber cylinder, a lower spacer ring, a lower rubber cylinder, a lower cone, a lower slip and a guide shoe, the central tube is provided with steps, the outer diameter of the central tube corresponding to the upper slip is larger than that of the central tube corresponding to the lower slip, the thickness of the lower slip is larger than that of the upper slip, and the external diameter is 95mm, the internal surface of the slip is provided with a conical surface matched with the cone, the external surface of the slip is provided with slip teeth, the strength of the lower slip teeth is greater than that of the upper slip teeth, a locking ring is arranged between the slip push ring and the central tube, a one-way locking structure which is arranged along the axial direction of the central tube and far away from the direction of the guide shoe is arranged between the locking ring and the central tube, a rubber tube inner ring is arranged in the middle rubber tube, and a sealing ring is arranged in the. The utility model discloses simple structure, anchor power are strong, still can go into smoothly when the sleeve pipe takes place to warp the undergauge.
Description
Technical Field
The utility model relates to a hydraulic fracturing stratum segmentation instrument technical field, in particular to soluble bridge plug of segmentation fracturing.
Background
The current common hydraulic fracturing stratum subsection tools comprise a soluble bridge plug, a composite bridge plug and the like. The composite bridge plug has large drilling and grinding chips and low drilling and grinding efficiency, and the chips are easy to block the ground flow. Along with the continuous deepening of the shale gas development at present, the horizontal section of the shale gas well is continuously lengthened, the sand adding amount in the fracturing construction process is continuously increased, and the construction discharge amount and the construction pressure are continuously improved, so that the conditions that the casing pipe deforms and shrinks are increasingly increased in the staged fracturing construction process due to the factors. Once deformation or diameter reduction occurs, the conventional soluble bridge plug cannot be normally inserted due to size limitation, so that construction period is delayed and other risks including safety and cost are caused. Therefore, in the existing shale gas development, the demand for small-size soluble bridge plugs is gradually increased, and the size and thickness of the pipe body, slips and other parts related to the small-size soluble bridge plugs are reduced along with the reduction of the overall size of the small-size soluble bridge plugs, and the anchoring force is reduced along with the reduction of the size and the thickness of the pipe body, the slips and other parts.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a simple structure, anchoring force are strong, the dissolvable bridge plug of segmentation fracturing that still can go into smoothly when the cover pipe takes place to warp the undergauge.
The technical scheme of the utility model as follows:
a segmented fracturing soluble bridge plug is made of soluble materials and comprises a central tube, wherein a slip push ring, an upper slip, an upper cone, an upper rubber cylinder, an upper spacer ring, a middle rubber cylinder, a lower spacer ring, a lower rubber cylinder, a lower cone, a lower slip and a guide shoe are sequentially sleeved on the central tube, the outer surface of the central tube is provided with steps, the outer diameter of the central tube corresponding to the upper slip is larger than that of the central tube corresponding to the lower slip, the thickness of the lower slip is larger than that of the upper slip, the outer diameters of the upper slip and the lower slip are both 95mm, the inner surface of the upper slip is provided with a conical surface matched with the upper cone, the inner surface of the lower slip is provided with a conical surface matched with the lower cone, the outer surfaces of the upper slip and the lower slip are both provided with slip teeth, the strength of the lower slip teeth is larger than that of the upper slip teeth, a locking ring is arranged between the slip push ring and, the locking direction of the unidirectional locking structure is the direction along the axial direction of the central tube and away from the guide shoe, a rubber cylinder inner ring is arranged in the middle rubber cylinder, and an O-shaped sealing ring is arranged in the rubber cylinder inner ring.
Preferably, split guide grooves are respectively arranged between the slip push ring and the upper slip and between the guide shoe and the lower slip.
Preferably, each functional component of the bridge plug is made of materials with different dissolving speeds, and the dissolving speeds of the upper rubber cylinder, the middle rubber cylinder, the lower rubber cylinder, the central pipe, the upper slip, the lower slip, the upper cone and the lower cone are smaller than those of the other functional components.
Preferably, the one-way locking structure is a latch provided on the contact surface of the locking ring and the central tube to be matched with each other.
Preferably, the lower end of the guide shoe is provided with a stop lever.
Preferably, the outer surface of the slip teeth is coated with a hard coating.
Preferably, the lower slip teeth are cylindrical alloy particles, and the upper slip teeth are cylindrical ceramic particles.
Preferably, the upper slip and the lower slip are of split structures and are equally divided into 8 segments, and 4 slip teeth are uniformly distributed on each segment.
Preferably, the outer surface of the guide shoe is provided with a plurality of ceramic guide shoe teeth, the guide shoe teeth are uniformly distributed in the radial direction of the guide shoe to form double rows, and the double rows of guide shoe teeth are distributed in a staggered manner.
The utility model has the advantages that:
1. adopt soluble material preparation for the bridging plug can be dissolved by well fluid along with the time lapse after accomplishing to sit and seal, has reduced later stage salvage process, has avoided the jam of well fluid flowback pipeline, has improved the flowback efficiency of well fluid. The full drift diameter of the sleeve can be realized without drilling and grinding the drift well, and the operation cost is reduced.
2. The outer surface of the central tube is provided with steps, the outer diameter of the central tube corresponding to the upper slip is larger than that of the central tube corresponding to the lower slip, the thickness of the lower slip is larger than that of the upper slip, the outer diameters of the upper slip and the lower slip are both 95mm, the inner surface of the upper slip is provided with a conical surface matched with the upper cone, the inner surface of the lower slip is provided with a conical surface matched with the lower cone, slip teeth are arranged on the outer surfaces of the upper slip and the lower slip, the strength of the lower slip teeth is larger than that of the upper slip teeth, the lower slip teeth are cylindrical alloy particles, the upper slip teeth are cylindrical ceramic particles, and the inner diameter of the lower slip teeth enables the bridge plug to be smoothly inserted when the; the arrangement of the steps and the slip teeth enables the bridge plug to provide strong anchoring force when bearing pressure.
3. The locking ring is arranged between the slip push ring and the central pipe, the one-way locking structure is arranged between the locking ring and the central pipe, the locking direction of the one-way locking structure is the axial direction of the central pipe and the direction of the guide shoe is far away, and the one-way locking structure is the clamping teeth which are arranged on the contact surfaces of the locking ring and the central pipe and are matched with each other, so that the locking ring can be prevented from moving in the direction of the guide shoe far away from the axial direction of the central pipe.
4. Through be equipped with the packing element inner ring in middle packing element, be equipped with O type sealing washer in the packing element inner ring, can improve the whole sealing performance of bridging plug.
5. The split guide grooves are respectively arranged between the slip push ring and the upper slip and between the guide shoe and the lower slip, so that the split is more uniform when the slip is set.
6. By arranging the bridge plug, all functional parts are made of materials with different dissolving speeds, the requirements of normal construction such as pumping and fracturing on the site can be ensured, and the abnormal conditions can be treated in the site for a certain time when the abnormal conditions such as a casing change well, a perforating gun string fault, a ground fracturing equipment fault and other uncontrollable factors occur.
7. Through set up the pin at the guide shoe lower extreme, can prevent that the center tube from blockking up when the back drainage.
8. Slips and lower slips are split type structures through setting up, and equally divide into 8 lamellas, and 4 slips teeth of every lamella evenly distributed can guarantee anchoring force when slips body is minimum destruction.
9. Through set up a plurality of pottery at the guide shoe surface and guide the shoe tooth, guide the shoe tooth and form double at guide shoe radial evenly distributed, and double guide shoe tooth staggered distribution can play wear-resisting protective effect in the process of going into the well.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of the staged fracturing soluble bridge plug of the present invention;
fig. 2 is the utility model discloses the one-way locking structure's of soluble bridging plug of staged fracturing structural schematic diagram.
Reference numbers in the figures:
1-central tube, 2-slip push ring, 3-upper slip, 4-upper cone, 5-upper edge rubber cylinder, 6-upper spacing ring, 7-middle rubber cylinder, 8-lower spacing ring, 9-lower edge rubber cylinder, 10-lower cone, 11-lower slip, 12-guide shoe, 13-slip tooth, 14-locking ring, 15-guide groove, 16-rubber cylinder inner ring, 17-sealing ring, 18-stop lever and 19-guide shoe tooth.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, a segmented fracturing soluble bridge plug is made of soluble materials, each functional component is made of materials with different dissolution rates, and the segmented fracturing soluble bridge plug comprises a central tube 1, a slip push ring 2, an upper slip 3, an upper cone 4, an upper rubber cylinder 5, an upper spacer ring 6, a middle rubber cylinder 7, a lower spacer ring 8, a lower rubber cylinder 9, a lower cone 10, a lower slip 11 and a guide shoe 12 are sequentially sleeved on the central tube 1, steps are arranged on the outer surface of the central tube 1, the outer diameter of the central tube 1 corresponding to the upper slip 3 is larger than that of the central tube 1 corresponding to the lower slip 11, the thickness of the lower slip 11 is larger than that of the upper slip 3, the outer diameters of the upper slip 3 and the lower slip 11 are both 95mm, a tapered surface matched with the upper cone 4 is arranged on the inner surface of the upper slip 3, a tapered surface matched with the lower cone 10 is arranged on the inner surface of the lower slip 11, slip teeth 13 are arranged on the outer surfaces of the upper, the outer surface of the slip tooth 13 is coated with a hard coating, the strength of the lower slip tooth is greater than that of the upper slip tooth, the lower slip tooth is cylindrical alloy particles, and the upper slip tooth is cylindrical ceramic particles. A locking ring 14 is arranged between the slip push ring 2 and the central tube 1, a one-way locking structure is arranged between the locking ring 14 and the central tube 1, the locking direction of the one-way locking structure is along the axial direction of the central tube 1 and is far away from the direction of the guide shoe 12, the one-way locking structure is a latch which is arranged on the contact surface of the locking ring 14 and the central tube 1 and is matched with the contact surface, and split guide grooves 15 are respectively arranged between the slip push ring 2 and the upper slip 3 and between the guide shoe 12 and the lower slip 11. A rubber cylinder inner ring 16 is arranged in the middle rubber cylinder 7, an O-shaped sealing ring 17 is arranged in the rubber cylinder inner ring 16, and a stop lever 18 is arranged at the lower end of the guide shoe 12.
In a specific embodiment, the upper slip 3 and the lower slip 11 are both of a split structure and are equally divided into 8 pieces, and 4 slip teeth 13 are uniformly distributed on each piece.
In another specific embodiment, the outer surface of the guide shoe 12 is provided with a plurality of ceramic guide shoe teeth 19, the guide shoe teeth 19 are uniformly distributed in the radial direction of the guide shoe 12 to form a double row, and the guide shoe teeth 12 in the double row are distributed in a staggered manner.
Use the utility model discloses the time, send the bridging plug to the sleeve pipe in the selected layer position department, start the setting instrument, the setting instrument promotes the slips throw-out collar and slides along the center tube, extrudees the packing element, makes the radial expansion of packing element hug closely the intraductal wall of sleeve, and the slips throw-out collar continues to remove and promotes upper and lower cone, and the cone path end inserts the slips in the slip conical surface and makes slips mechanism atress and be strutted the extension, and the slips is from weak point fracture part to, and the slips tooth anchoring is accomplished in the inside pipe wall, setting.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (9)
1. A segmented fracturing soluble bridge plug is characterized in that the bridge plug is made of soluble materials and comprises a central tube, a slip push ring, an upper slip, an upper cone, an upper rubber cylinder, an upper spacer ring, a middle rubber cylinder, a lower spacer ring, a lower rubber cylinder, a lower cone, a lower slip and a guide shoe are sequentially sleeved on the central tube, steps are arranged on the outer surface of the central tube, the outer diameter of the central tube corresponding to the upper slip is larger than the outer diameter of the central tube corresponding to the lower slip, the thickness of the lower slip is larger than that of the upper slip, the outer diameters of the upper slip and the lower slip are both 95mm, a tapered surface matched with the upper cone is arranged on the inner surface of the upper slip, a tapered surface matched with the lower cone is arranged on the inner surface of the lower slip, slip teeth are arranged on the outer surfaces of the upper slip and the lower slip, the strength of the lower slip teeth is larger than that of the upper slip, a one-way locking structure is arranged between the locking ring and the central pipe, the locking direction of the one-way locking structure is the direction along the axial direction of the central pipe and away from the guide shoe, a rubber cylinder inner ring is arranged in the middle rubber cylinder, and an O-shaped sealing ring is arranged in the rubber cylinder inner ring.
2. The segmented fracturing soluble bridge plug according to claim 1, wherein split guide grooves are respectively arranged between the slip push ring and the upper slip and between the guide shoe and the lower slip.
3. The staged fracturing soluble bridge plug of claim 1, wherein the functional components of the bridge plug are made of materials with different dissolution rates.
4. The frac soluble bridge plug of claim 1, wherein said one-way locking feature is a cooperating latch provided on the interface of the locking ring and the central pipe.
5. The segmented fracturing soluble bridge plug as claimed in claim 1, wherein the guide shoe is provided with a stop rod at the lower end.
6. The frac soluble bridge plug of claim 1, wherein said slip teeth are hard coated on the outer surface.
7. The segmented fracturing soluble bridge plug of claim 1, wherein the lower slip teeth are cylindrical alloy particles and the upper slip teeth are cylindrical ceramic particles.
8. The segmented fracturing soluble bridge plug according to any one of claims 1 to 7, wherein the upper slips and the lower slips are of split structures and are equally divided into 8 pieces, and 4 slip teeth are uniformly distributed on each piece.
9. The segmented fracturing soluble bridge plug according to any one of claims 1 to 7, wherein the outer surface of the guide shoe is provided with a plurality of ceramic guide shoe teeth, the guide shoe teeth are uniformly distributed in the radial direction of the guide shoe to form a double row, and the guide shoe teeth in the double row are distributed in a staggered manner.
Priority Applications (1)
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CN201921311669.7U CN210343303U (en) | 2019-08-14 | 2019-08-14 | Soluble bridge plug for staged fracturing |
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CN201921311669.7U CN210343303U (en) | 2019-08-14 | 2019-08-14 | Soluble bridge plug for staged fracturing |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112647891A (en) * | 2020-12-24 | 2021-04-13 | 中石化石油工程技术服务有限公司 | Full-soluble bridge plug |
CN112796701A (en) * | 2021-01-26 | 2021-05-14 | 四川省威沃敦化工有限公司 | Soluble bridge plug suitable for high-temperature well condition |
CN113414332A (en) * | 2021-06-21 | 2021-09-21 | 四川捷贝通能源科技有限公司 | Fully soluble slip tooth material and preparation method and application thereof |
-
2019
- 2019-08-14 CN CN201921311669.7U patent/CN210343303U/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112647891A (en) * | 2020-12-24 | 2021-04-13 | 中石化石油工程技术服务有限公司 | Full-soluble bridge plug |
CN112796701A (en) * | 2021-01-26 | 2021-05-14 | 四川省威沃敦化工有限公司 | Soluble bridge plug suitable for high-temperature well condition |
CN113414332A (en) * | 2021-06-21 | 2021-09-21 | 四川捷贝通能源科技有限公司 | Fully soluble slip tooth material and preparation method and application thereof |
CN113414332B (en) * | 2021-06-21 | 2022-05-13 | 四川捷贝通能源科技有限公司 | Fully soluble slip tooth material and preparation method and application thereof |
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Address after: Room 681, 6th floor, scientific research building, No.18 Fukang Road, science and Technology Park, Changping District, Beijing 102200 Patentee after: Jetbeton Petroleum Technology Group Co., Ltd Address before: 102200, Beijing Changping District science and Technology Park, super Road, No. 37, No. 6, building 4, No. 1275 Patentee before: BEIJING GEPETTO OIL TECHNOLOGY Co.,Ltd. |