CN112253044A - High-ductility small-diameter dissolvable bridge plug - Google Patents
High-ductility small-diameter dissolvable bridge plug Download PDFInfo
- Publication number
- CN112253044A CN112253044A CN202011214688.5A CN202011214688A CN112253044A CN 112253044 A CN112253044 A CN 112253044A CN 202011214688 A CN202011214688 A CN 202011214688A CN 112253044 A CN112253044 A CN 112253044A
- Authority
- CN
- China
- Prior art keywords
- bridge plug
- cone
- setting
- dissolvable
- slip
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- 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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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
-
- 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
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
Abstract
The invention discloses a high-ductility small-diameter dissolvable bridge plug, which comprises a setting outer cylinder, a connector, a central pipe, a releasing shear pin, a spacer ring, a starting shear pin, an upper slip, slip particles, an upper cone, an anti-rotating pin, a protection ring, a rubber cylinder assembly, a lower cone, a lower slip and a base, wherein the rest of the body material of the dissolvable bridge plug except the rubber cylinder is made of high-elongation dissolvable metal magnesium-based alloy, the extensibility of the dissolvable metal magnesium-based alloy is more than 30%, the yield strength is not less than 280MPa, the hardness is more than 60HB, and the dissolution rate of a KCl solution with the mass percentage concentration of 3% at 93 ℃ reaches 70mg/h.cm2. The inner surfaces of the upper cone and the lower cone are designed with saw-toothed shapes, so that the roughness of the inner surface of the cone is increased, and the axial locking of the soluble bridge plug after setting is ensured. The bridge plug is used for plugging measures in the fracturing process, and the bridge plug can be completely dissolved in the shaft after fracturing construction is completed, so that the full drift diameter of the shaft is realized, and convenience is provided for subsequent construction.
Description
Technical Field
The invention relates to a soluble bridge plug tool for fracturing operation in the technical field of oil and gas field exploitation, in particular to a high-ductility small-diameter soluble bridge plug.
Background
At present, in oil gas well fracturing production increase technical field, generally adopt combined material bridging plug to carry out the shutoff fracturing, the compound bridging plug is in boring except removing the back, can realize the pit shaft full latus rectum, is favorable to the construction operation in later stage, but boring of compound bridging plug removes need drop into a large amount of time cost, bores except that to waste time and energy, in addition, if oil gas well horizontal segment overlength, can not bore effectively and grind, has certain limitation.
The soluble bridge plug can be dissolved completely in the flowback fluid after fracturing is completed, so that the full drift diameter of a shaft can be realized without drilling operation, drilling and grinding cost is saved, and operation risk is reduced. However, with the field popularization and use of the soluble bridge plug, a plurality of application limitations are gradually discovered, mainly including that the soluble bridge plug is not firmly set, and is not effective in early unsealing.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-ductility small-diameter dissolvable bridge plug, which can be dissolved in fracturing flow-back fluid automatically after fracturing construction, realizes the full drift diameter of the whole shaft, does not need drilling and grinding, and provides a full drift diameter channel for the operation measures of full drift diameter fluid flow-back gas production, later-stage sand washing, testing, fluid production profile monitoring and the like.
In order to solve the technical problems, the invention adopts the technical scheme that: a high-ductility small-diameter dissoluble bridge plug comprises a setting outer cylinder, a connector, a central tube, a releasing shear pin, a spacer ring, a starting shear pin, an upper slip, slip particles, an upper cone, an anti-rotation pin, a protection ring, a rubber cylinder assembly, a lower cone, a lower slip and a base, wherein the dissoluble bridge plug spacer ring, the upper slip, the upper cone, the rubber cylinder, the protection ring, the lower cone and the lower slip are sequentially sleeved on the central tube, the base is in threaded connection with the outer part of the lower end of the central tube, the upper end of the central tube is fixed on the connector through the releasing shear pin, the end face of the lower end of the setting outer cylinder is extruded on the dissoluble bridge plug spacer ring, the upper end of the connector is connected on a core shaft of an ignition setting tool through T-shaped threads, the upper end of the setting outer cylinder is connected on the outer cylinder of the lower end of the ignition setting tool through T-shaped threads, the rest, the yield strength is not less than 280MPa, the hardness is more than 60HB, and the dissolution rate of a KCl solution with the mass percentage concentration of 3 percent at 93 ℃ reaches 70mg/h.cm2。
The inner surfaces of the upper cone and the lower cone are designed with saw-toothed shapes, so that the roughness of the inner surface of the cone is increased, and the axial locking of the soluble bridge plug after setting is ensured.
The invention has the beneficial effects that: the bridge plug tool can be completely dissolved in a shaft after fracturing construction is completed, so that the full drift diameter of the shaft is realized, and convenience is provided for subsequent construction.
Drawings
FIG. 1 is an overall block diagram of a high ductility, small diameter dissolvable bridge plug of the present invention
FIG. 2 is a block diagram of a soluble bridge plug cone of the present invention
In the figure, 1, an outer setting cylinder, 2, a connector, 3, a central pipe, 4, a releasing shear pin, 5, a spacer ring, 6, a starting shear pin, 7, an upper slip, 8 slip particles, 9, an upper cone, 10, an anti-rotation pin, 11, a protection ring, 12, a rubber cylinder assembly, 13, a lower cone, 14, a lower slip and 15 bases.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The soluble bridge plug of the invention has the same working principle as the prior art, and can refer to the prior art, so the soluble bridge plug is not described again, and the soluble bridge plug is different from the prior art in material and cone structure, and the following detailed description is given:
as shown in figures 1 and 2, the high-ductility small-diameter dissolvable bridge plug comprises a setting outer cylinder 1, a connector 2, a central pipe 3, a releasing shear pin 4, a spacer ring 5 and a starting shearThe anti-rotation anchor pin comprises a nail 6, an upper slip 7, slip particles 8, an upper cone 9, an anti-rotation pin 10, a protection ring 11, a rubber cylinder assembly 12, a lower cone 13, a lower slip 14 and a base 15, a soluble bridge plug spacer ring 5, the upper slip 7, the upper cone 9, a rubber cylinder 12, the protection ring 11, the lower cone 13 and the lower slip 14 are sequentially sleeved on a central tube 3, the base 15 is in threaded connection with the outer part of the lower end of the central tube 3, the upper end of the central tube 3 is fixed on a connector 2 through a releasing shear pin 4, the end face of the lower end of a setting outer cylinder 1 is extruded on the soluble bridge plug spacer ring 5, the upper end of the connector 2 is connected on a core shaft of an ignition setting tool through T-shaped threads, the upper end of the setting outer cylinder 1 is connected on the outer cylinder of the lower end of the ignition setting tool through T-shaped threads, and is characterized in that the rest of the body materials of the soluble, the yield strength is not less than 280MPa, the hardness is more than 60HB, and the dissolution rate of a KCl solution with the mass percentage concentration of 3 percent at 93 ℃ reaches 70mg/h.cm2。
The inner surfaces of the upper cone 9 and the lower cone 13 are designed with saw-toothed shapes, so that the roughness of the inner surface of the cone is increased, and the axial locking of the soluble bridge plug after setting is ensured.
Pumping a soluble bridge plug into a well by adopting a cable, sequentially pumping the soluble bridge plug, a setting barrel, a cable setting tool, a perforating gun and a cable to a well mouth from bottom to top on a pipe column, igniting and starting the cable setting tool after the soluble bridge plug is pumped to a designed position, generating downward thrust to push the setting outer barrel 1, connecting a base 15 with a central pipe 3 in a threaded manner, connecting the central pipe 3 on a mandrel of the cable setting tool through a connector 2, pushing a spacer ring 5 downwards by the setting outer barrel 1, shearing a starting shear pin 6 to push an upper slip 7 and an upper cone 9 downwards, extruding a rubber barrel 12, a lower cone 13 and a lower slip 14, expanding and anchoring the upper slip and the lower slip on the wall of a casing respectively, extruding the rubber barrel 12 to complete setting, completing releasing of the soluble bridge plug when setting force continuously rises to shear a releasing shear pin 4, lifting the cable to a perforating point to perform perforating operation, and pulling out the cable after completing, the soluble ball and the bridge plug central pipe 3 form a seal when the ball is thrown to the soluble bridge plug from the well mouth, and the fracturing construction is started; after fracturing construction is finished, the soluble bridge plug is completely dissolved in the fracturing flow-back fluid for 7-15 days, and the full drift diameter of the shaft is realized.
The high-ductility dissolvable bridge plug of the present invention has the advantages of:
(1) the body materials except the rubber cylinder of the soluble bridge plug are high-elongation soluble metal materials which mainly comprise magnesium-based alloy, the elongation is more than 30 percent, the yield strength reaches more than 280MPa, the hardness is more than 60HB, and the dissolution rate of the material in a 3 percent KCL solution at 93 ℃ reaches 70mg/h.cm2And the ductility of key components such as slips in the setting process is ensured, and the anchoring of the small slips outside diameter in a sleeve with a relatively large size can be realized (a four-inch and a half-inch bridge plug tool is used for sealing and separating a five-inch and a half-inch sleeve). In addition, the material still has higher strength under the high-temperature condition, and a dissolved product becomes a suspended powder in water and is easy to flow back;
(2) the setting stroke of the bridge plug is long, after the setting tool starts ignition and starts, the setting outer cylinder pushes the spacer ring to move downwards to the slip anchoring sleeve, and due to the fact that high-ductility materials are adopted in slips and the like, the longitudinal expansion anchoring process time is long, the setting motion stroke is lengthened, and the purpose that the small-diameter bridge plug can better seal and separate large-size sleeves can be achieved;
(3) the inner surface of the cone is designed with saw-toothed shapes, so that the roughness of the inner surface is increased, and the axial locking of the soluble bridge plug after setting is ensured.
In summary, the disclosure of the present invention is not limited to the above-mentioned embodiments, and persons skilled in the art can easily set forth other embodiments within the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.
Claims (2)
1. The utility model provides a dissoluble bridging plug of high ductility minor diameter, including setting up urceolus (1), connector (2), center tube (3), release shear pin (4), spacer ring (5), start shear pin (6), go up slips (7), slips grain (8), go up cone (9), prevent changeing pin (10), protection ring (11), packing element assembly (12), lower cone (13), slips (14) and base (15) down, dissoluble bridging plug spacer ring (5), go up slips (7), go up cone (9), packing element (12), protection ring (11), lower cone (13), slip (14) are overlapped on center tube (3) in proper order down, base (15) and center tube (3) lower extreme outside threaded connection, well head (2), base (15) and center tube (3) lower extreme outside threaded connectionThe upper end of a core tube (3) is fixed on a connector (2) through a releasing shear pin (4), the end face of the lower end of a setting outer cylinder (1) is extruded on a soluble bridge plug spacer ring (5), the upper end of the connector (2) is connected on a core shaft of an ignition setting tool through a T-shaped thread, and the upper end of the setting outer cylinder (1) is connected on the outer cylinder of the lower end of the ignition setting tool through a T-shaped thread2。
2. The high ductility small diameter dissolvable bridge plug according to claim 1, wherein the inner surfaces of the upper cone (9) and the lower cone (13) are designed with serrations, increasing the roughness of the inner surfaces of the cones, ensuring axial locking of the dissolvable bridge plug after setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011214688.5A CN112253044A (en) | 2020-11-05 | 2020-11-05 | High-ductility small-diameter dissolvable bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011214688.5A CN112253044A (en) | 2020-11-05 | 2020-11-05 | High-ductility small-diameter dissolvable bridge plug |
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| Publication Number | Publication Date |
|---|---|
| CN112253044A true CN112253044A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011214688.5A Pending CN112253044A (en) | 2020-11-05 | 2020-11-05 | High-ductility small-diameter dissolvable bridge plug |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216898A (en) * | 2021-03-04 | 2021-08-06 | 中国石油化工股份有限公司 | Full-solution fracturing bridge plug |
| CN115749677A (en) * | 2022-11-18 | 2023-03-07 | 西南石油大学 | Small-diameter soluble bridge plug for segmented fracturing C-type shale casing deformation well |
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| CN102913171A (en) * | 2012-10-30 | 2013-02-06 | 陕西启源科技发展有限责任公司 | Slip socket |
| US20170314361A1 (en) * | 2016-04-27 | 2017-11-02 | Geodynamics, Inc. | Configurable bridge plug apparatus and method |
| CN109236230A (en) * | 2018-11-28 | 2019-01-18 | 中国石油集团渤海钻探工程有限公司 | A kind of magnesium-base metal dissolvable bridge plug |
| CN208502731U (en) * | 2018-08-01 | 2019-02-15 | 四川省威沃敦化工有限公司 | A kind of solvable bridge plug of minor diameter |
| CN208605164U (en) * | 2018-07-12 | 2019-03-15 | 重庆双标石油工程技术服务有限公司 | Dissolvable bridge plug |
| CN109519125A (en) * | 2019-01-25 | 2019-03-26 | 王环环 | A kind of self-locking typ quick-jointing reaming bit |
| CN109973045A (en) * | 2019-03-29 | 2019-07-05 | 东方宝麟科技发展(北京)有限公司 | Complete solvable bridge plug |
| CN110106416A (en) * | 2019-05-24 | 2019-08-09 | 山东省科学院新材料研究所 | A kind of superhigh intensity can dissolve magnesium alloy and its preparation method and application |
| WO2020050956A1 (en) * | 2018-09-07 | 2020-03-12 | Gryphon Oilfield Solutions, Llc | Dissolvable frac plug |
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2020
- 2020-11-05 CN CN202011214688.5A patent/CN112253044A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913171A (en) * | 2012-10-30 | 2013-02-06 | 陕西启源科技发展有限责任公司 | Slip socket |
| US20170314361A1 (en) * | 2016-04-27 | 2017-11-02 | Geodynamics, Inc. | Configurable bridge plug apparatus and method |
| CN208605164U (en) * | 2018-07-12 | 2019-03-15 | 重庆双标石油工程技术服务有限公司 | Dissolvable bridge plug |
| CN208502731U (en) * | 2018-08-01 | 2019-02-15 | 四川省威沃敦化工有限公司 | A kind of solvable bridge plug of minor diameter |
| WO2020050956A1 (en) * | 2018-09-07 | 2020-03-12 | Gryphon Oilfield Solutions, Llc | Dissolvable frac plug |
| CN109236230A (en) * | 2018-11-28 | 2019-01-18 | 中国石油集团渤海钻探工程有限公司 | A kind of magnesium-base metal dissolvable bridge plug |
| CN109519125A (en) * | 2019-01-25 | 2019-03-26 | 王环环 | A kind of self-locking typ quick-jointing reaming bit |
| CN109973045A (en) * | 2019-03-29 | 2019-07-05 | 东方宝麟科技发展(北京)有限公司 | Complete solvable bridge plug |
| CN110106416A (en) * | 2019-05-24 | 2019-08-09 | 山东省科学院新材料研究所 | A kind of superhigh intensity can dissolve magnesium alloy and its preparation method and application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216898A (en) * | 2021-03-04 | 2021-08-06 | 中国石油化工股份有限公司 | Full-solution fracturing bridge plug |
| CN115749677A (en) * | 2022-11-18 | 2023-03-07 | 西南石油大学 | Small-diameter soluble bridge plug for segmented fracturing C-type shale casing deformation well |
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Application publication date: 20210122 |
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