CN114876407B - A ball-free metal-sealed dissolvable bridge plug - Google Patents
A ball-free metal-sealed dissolvable bridge plugInfo
- Publication number
- CN114876407B CN114876407B CN202210708995.1A CN202210708995A CN114876407B CN 114876407 B CN114876407 B CN 114876407B CN 202210708995 A CN202210708995 A CN 202210708995A CN 114876407 B CN114876407 B CN 114876407B
- Authority
- CN
- China
- Prior art keywords
- ball
- ball seat
- pull rod
- hole
- conical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/08—Down-hole devices using materials which decompose under well-bore conditions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
本发明公开一种免投球的金属密封可溶解桥塞，包括推筒，推筒上端与坐封工具螺纹连接，下端装在球座上部的内孔里；还包括拉杆和转换接头，拉杆和转换接头位于轴心，转换接头、球座、卡瓦依次套装在拉杆上；转换接头设在推筒内，转换接头上端连接坐封工具，下端位于球座内并通过螺纹连接拉杆；球座下端与卡瓦套接；底座套装在拉杆尾部并通过螺纹连接；可溶解球位于转换接头下端内。本发明节省了在井口投入可溶解球的环节，提高了施工效率，并且桥塞坐封后，立即对桥塞的坐封情况进行验证，提高了桥塞施工的可靠性。金属密封环温度适应范围宽，密封效果好；整体卡瓦和锁紧结构，减少工具的部件，缩短了工具的尺寸，有利于工具的下入。
This invention discloses a ball-free metal-sealed dissolvable bridge plug, comprising a pusher cylinder, the upper end of which is threadedly connected to a setting tool, and the lower end which is installed in the inner hole of the upper part of a ball seat; it also includes a pull rod and a conversion joint, the pull rod and the conversion joint being located at the axis, and the conversion joint, the ball seat, and the slips being sequentially fitted onto the pull rod; the conversion joint is located inside the pusher cylinder, the upper end of which is connected to the setting tool, and the lower end is located in the ball seat and threadedly connected to the pull rod; the lower end of the ball seat is sleeved with the slips; a base is fitted onto the tail of the pull rod and threadedly connected; and a dissolvable ball is located in the lower end of the conversion joint. This invention saves the step of inserting a dissolvable ball at the wellhead, improving construction efficiency, and allows for immediate verification of the bridge plug's setting status after setting, improving the reliability of bridge plug construction. The metal sealing ring has a wide temperature adaptability range and good sealing effect; the integral slips and locking structure reduce the number of tool parts, shorten the tool size, and facilitate tool insertion.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a ball-throwing-free metal sealing dissolvable bridge plug.
Background
The soluble bridge plugs currently used in the market are mostly processed into sealing materials by adopting soluble rubber. When the characteristic of the soluble rubber material is that the oil well temperature is high, the rubber strength is fast invalid, the sealing capability is reduced, and meanwhile, the dissolving capability is reduced, and the dissolving time is long or the rubber is not dissolved in a low-temperature state. In addition, the rubber sealing bridge plug has complex structure, more parts and long size, increases the cost of the tool and is not beneficial to the insertion of the tool.
The existing bridge plug staged fracturing adopts a perforation and bridge plug setting combined technology, namely after the bridge plug is set, a cable is lifted and put in for perforation, then a perforation tool and a setting tool are taken out of an oil well, and a sealing ball is put in for plugging a central channel of the bridge plug during fracturing.
In addition, the sealing parts of the soluble bridge plug in the prior art are all made of rubber materials, the application range is limited, the number of structural parts is large, the design has defects, the length is long, the inner diameter is small, and the insertion is not utilized. After setting the bridge plug, a ball is needed to be put into a central channel of the bridge plug from a wellhead, and meanwhile, the setting condition of the bridge plug cannot be verified, so that the working efficiency and the fracturing effect are affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the ball-throwing-free metal sealing soluble bridge plug which is simple in structure, few in parts, short in length and reliable in sealing, so that the problems of defects and defects in the use of the soluble bridge plug in the prior art are solved.
A metal seal soluble bridge plug free of ball throwing comprises a push cylinder, wherein the upper end of the push cylinder is in threaded connection with a setting tool, and the lower end of the push cylinder is arranged in an inner hole at the upper part of a ball seat;
The automatic slip device also comprises a pull rod and an adapter, wherein the pull rod and the adapter are positioned at the axle center, and the adapter, the ball seat and the slips are sleeved on the pull rod in sequence;
the conversion joint is arranged in the pushing cylinder, the upper end of the conversion joint is connected with the setting tool, and the lower end of the conversion joint is positioned in the ball seat and is connected with the pull rod through threads;
the lower end of the ball seat is sleeved with the slips, the base is sleeved at the tail of the pull rod and connected with the pull rod through threads, and the dissolvable ball is positioned in the lower end of the adapter.
The pushing cylinder is of a cylindrical structure and sequentially comprises a large-diameter cylindrical surface at the upper end and a small-diameter cylindrical surface at the lower end, threads connected with a setting tool are arranged on the inner wall of the upper end, a notch is formed in the lower end and extends from the small-diameter cylindrical surface to the large-diameter cylindrical surface, two symmetrical countersunk holes are formed in the side face perpendicular to the notch, and the countersunk holes are provided with threads and are connected with guide screws in a threaded mode.
The adapter is of a cylindrical structure, the outer cylindrical surface comprises a small cylindrical surface at the lower end and a large cylindrical surface at the upper end, the joint of the small cylindrical surface and the large cylindrical surface is a transitional conical surface, the small cylindrical surface is cut into two symmetrical planes, a spherical hole is formed in the plane, a dissolvable ball is arranged in the spherical hole of the adapter, two symmetrical guide grooves are formed in the outer cylindrical surface, the axis of each guide groove is perpendicular to the axis of the spherical hole, and the tail end of each guide screw is located in each guide groove. The inner wall of the upper end is provided with threads connected with a setting tool, and the inner wall of the lower end is provided with threads connected with a pull rod;
The ball seat comprises a ball seat body and a cylindrical structure, wherein the lower end of the outer surface of the ball seat body is a conical surface, locking conical threads are arranged at the lower end of the conical surface, the inner cavity of the ball seat body sequentially comprises three first inner holes, second inner holes and third inner holes with gradually smaller diameters from the upper end to the lower end, a step and an inner conical surface are arranged between the first inner holes and the second inner holes, and a sealing conical surface is arranged between the second inner holes and the third inner holes. The step is jointed with the lower end surface of the pushing cylinder, and the inner conical surface is jointed with the transitional conical surface of the conversion joint.
The inner wall of the upper end of the cylindrical structure is a conical hole, the lower end of the conical hole is a conical thread, the slips are sleeved on the ball seat, and the conical hole is meshed with the conical surface of the ball seat. A plurality of cuts are evenly and mutually crossed and cut along the axial direction from the upper end face and the lower end face of the slip, and round holes are radially arranged at the tail end of each cut from the outer cylindrical surface.
The inner surface of the metal sealing piece is a sealing conical surface, sleeved on the conical surface of the ball seat and positioned at the end face of the upper end of the slip.
When the bridge plug is set, the push cylinder and the ball seat move forwards along the axial direction, and the adapter, the dissolvable ball, the metal sealing ring, the slips, the base and the pull rod are axially and relatively static. The metal sealing ring and the slips are radially expanded under the pushing of the pushing cylinder and the ball seat.
After the metal sealing ring and the slips are expanded by a certain size along the radial direction, the metal sealing ring and the slips are clung to the inner wall of the sleeve, and the sleeve is sealed up and down by the metal sealing ring. The slips are anchored to the casing and subjected to the upper pack-off pressure.
When the pushing cylinder, the conversion joint, the dissolvable ball and the pull rod are pulled out along the axial direction, the dissolvable ball slides out from the ball hole.
When fracturing the target layer, the dissolvable ball sits on the sealing cone in the ball seat.
The pull rod, the adapter, the push cylinder and the guide screw are made of metal materials, after the bridge plug is sealed, the pull rod, the adapter, the push cylinder and the guide screw are put forward an oil well, other parts are thrown underground, wherein a dissolvable ball is pushed by fracturing fluid to be sealed on the conical surface of the ball seat, the central channel of the bridge plug is sealed, and the fracturing layer section is sealed. The components lost downhole are all made of magnesium-based dissolvable metallic materials and automatically dissolve after fracturing is completed.
The invention adopts a novel bridge plug central channel structure, saves the links of throwing soluble balls into a wellhead after the traditional bridge plug is set, improves the construction efficiency, immediately verifies the setting condition of the bridge plug after the bridge plug is set, and improves the reliability of bridge plug construction. Meanwhile, the metal sealing ring has wide temperature adaptation range and good sealing effect, and the integral slips and the novel locking structure reduce parts of the tool, shorten the size of the tool and are beneficial to the insertion of the tool.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a three-dimensional view of the push barrel of the present invention;
FIG. 4 is a three-dimensional view of the adapter of the present invention;
FIG. 5 is a structural view of the tee of the present invention
FIG. 6 is a three-dimensional view of a slip bowl of the present invention
FIG. 7 is one of the principle views of the bridge plug setting of the present invention
FIG. 8 is a second schematic view of the bridge plug setting of the present invention
Fig. 9 is a schematic view of the ball seating of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
As shown in fig. 1 and 2, a ball-throwing-free metal sealing soluble bridge plug comprises a push cylinder 1, wherein the upper end of the push cylinder 1 is in threaded connection with a setting tool, and the lower end of the push cylinder is arranged in an inner hole at the upper part of a ball seat 4;
The hydraulic power generation device further comprises a pull rod 7 and an adapter 2, wherein the pull rod 7 and the adapter 2 are positioned at the axle center, and the adapter 2, the ball seat 4 and the slips 6 are sequentially sleeved on the pull rod 7;
The adapter 2 is arranged in the push cylinder 1, the upper end of the adapter 2 is connected with a setting tool, and the lower end of the adapter 2 is positioned in the ball seat 4 and is connected with the pull rod 7 through threads;
the lower end of the ball seat 4 is sleeved with the slips 6, the base 8 is sleeved at the tail of the pull rod 7 and connected with the pull rod through threads, and the dissolvable ball 3 is positioned in the lower end of the adapter 2;
As shown in FIG. 3, the push cylinder 1 is of a cylindrical structure and sequentially comprises a large-diameter cylindrical surface 14 at the upper end and a small-diameter cylindrical surface 15 at the lower end, wherein threads connected with a setting tool are arranged on the inner wall of the upper end, a notch 11 is formed in the lower end, the width of the notch 11 is 30-50mm, the length of the notch 11 is 50-160mm, the notch 11 extends from the small-diameter cylindrical surface 15 to the large-diameter cylindrical surface 14, two symmetrical countersunk holes 12 are formed in the side face of the notch 11 in the vertical direction, and the countersunk holes 12 are provided with threads and are in threaded connection with guide screws 19.
As shown in fig. 4, the adapter 2 is of a cylindrical structure, the outer cylindrical surface comprises a small cylindrical surface 21 at the lower end and a large cylindrical surface 22 at the upper end, a transitional conical surface 23 is arranged at the joint of the small cylindrical surface 21 and the large cylindrical surface 22, the small cylindrical surface 21 is cut into two symmetrical planes 24, a ball hole 25 is arranged on the planes 24, the dissolvable ball 3 is arranged in the ball hole 25 of the adapter 2, two symmetrical guide grooves 26 are arranged on the outer cylindrical surface, the axis of each guide groove 26 is perpendicular to the axis of the ball hole 25, and the tail end of each guide screw 19 is positioned in each guide groove 26. The inner wall of the upper end is provided with threads connected with a setting tool, and the inner wall of the lower end is provided with threads connected with a pull rod 7;
As shown in fig. 5, the ball seat 4 is in a cylindrical structure, the lower end of the outer surface of the ball seat 4 is a conical surface 41, a locking conical thread 42 with the length of 10-40mm is arranged at the lower end of the conical surface 41, the inner cavity of the ball seat 4 sequentially comprises three first inner holes 43, second inner holes 44 and third inner holes 45 with gradually smaller diameters from the upper end to the lower end, a step 46 and an inner conical surface 47 are arranged between the first inner holes 43 and the second inner holes 44, and a sealing conical surface 48 is arranged between the second inner holes 44 and the third inner holes 45. The step 46 is attached to the lower end surface of the push tube 1, and the inner conical surface 47 is attached to the transitional conical surface 23 of the adapter 2.
As shown in fig. 6, the slips 6 are in a cylindrical structure, the inner wall of the upper end is a conical hole 61, the lower end of the conical hole 61 is a conical thread 62, the slips 6 are sleeved on the ball seat 4, and the conical hole 61 is meshed with the conical surface 41 of the ball seat 4. A plurality of cuts 63 are evenly and mutually crossed and cut along the axial direction from the upper end face and the lower end face of the slip 6, each cut 63 is 5-10mm away from the end face, and a round hole 64 is arranged at the tail end of each cut 63 in the radial direction from the outer cylindrical surface.
The metal sealing piece 5 is of a cylindrical structure, the inner surface of the metal sealing piece is a sealing conical surface 51, the metal sealing piece is sleeved on the conical surface 41 of the ball seat 4, and the metal sealing piece is positioned at the upper end face of the slip 6.
As shown in fig. 7, one of the bridge plug setting schematics of the present invention, the metal seal ring 5 expands outwardly to the interior wall of the casing 50, the slips 6 expand outwardly to the interior wall of the casing 50,
As shown in fig. 8, in the second bridge plug setting schematic diagram of the present invention, after the bridge plug is set, when the push cylinder 1, the adapter 2, the dissolvable ball 3 and the pull rod 7 are pulled out together along the axial direction, the dissolvable ball 3 slides out from the hole 25.
As shown in fig. 9, the schematic diagram of seating of the dissolvable ball according to the present invention, the setting tool is lifted up, the liquid is pumped into the well bore, the dissolvable ball 3 enters the central bore of the bridge plug along with the liquid, the dissolvable ball 3 falls on the sealing conical surface 48 of the ball seat 4, and the central passage of the bridge plug is blocked.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210708995.1A CN114876407B (en) | 2022-06-21 | 2022-06-21 | A ball-free metal-sealed dissolvable bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210708995.1A CN114876407B (en) | 2022-06-21 | 2022-06-21 | A ball-free metal-sealed dissolvable bridge plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114876407A CN114876407A (en) | 2022-08-09 |
| CN114876407B true CN114876407B (en) | 2025-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210708995.1A Active CN114876407B (en) | 2022-06-21 | 2022-06-21 | A ball-free metal-sealed dissolvable bridge plug |
Country Status (1)
| Country | Link |
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| CN (1) | CN114876407B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116575884A (en) * | 2023-05-25 | 2023-08-11 | 重庆昱华新材料科技有限公司 | Expansion sealing metal sealing soluble bridge plug |
| US12320229B1 (en) * | 2023-11-17 | 2025-06-03 | Parker-Hannifin Corporation | Fracking plug with a telescopic cone configuration |
| CN117703304A (en) * | 2023-12-27 | 2024-03-15 | 重庆昱华新材料科技有限公司 | An all-metal soluble ball seat for self-compensating fracturing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215889974U (en) * | 2021-10-11 | 2022-02-22 | 濮阳市东昊机械电子有限公司 | All-metal soluble bridge plug with pumping channel |
| CN217538649U (en) * | 2022-06-21 | 2022-10-04 | 重庆昱华新材料科技有限公司 | Metal sealing dissoluble bridge plug free of ball throwing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2018004706A (en) * | 2016-11-17 | 2018-08-15 | Downhole Tech Llc | Downhole tool and method of use. |
| US11261683B2 (en) * | 2019-03-01 | 2022-03-01 | Innovex Downhole Solutions, Inc. | Downhole tool with sleeve and slip |
| CN110617028B (en) * | 2019-09-23 | 2021-09-28 | 中国石油天然气股份有限公司 | Bridge plug for fracturing without ball throwing |
| CN111622708A (en) * | 2020-04-30 | 2020-09-04 | 中国海洋石油集团有限公司 | Airtight production packer |
| US11319770B2 (en) * | 2020-06-24 | 2022-05-03 | Weatherford Technology Holdings, Llc | Downhole tool with a retained object |
| CN112576220A (en) * | 2020-12-04 | 2021-03-30 | 中石化石油工程技术服务有限公司 | Large-drift-diameter expansion type fully-soluble bridge plug, setting connection tool thereof and use method |
| CN215949429U (en) * | 2021-09-16 | 2022-03-04 | 重庆贝斯特石油科技有限公司 | Metal sealing dissoluble bridge plug |
-
2022
- 2022-06-21 CN CN202210708995.1A patent/CN114876407B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215889974U (en) * | 2021-10-11 | 2022-02-22 | 濮阳市东昊机械电子有限公司 | All-metal soluble bridge plug with pumping channel |
| CN217538649U (en) * | 2022-06-21 | 2022-10-04 | 重庆昱华新材料科技有限公司 | Metal sealing dissoluble bridge plug free of ball throwing |
Also Published As
| Publication number | Publication date |
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| CN114876407A (en) | 2022-08-09 |
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