CN113153238A - Releasable short-circuit device for oil and gas well perforation - Google Patents
Releasable short-circuit device for oil and gas well perforation Download PDFInfo
- Publication number
- CN113153238A CN113153238A CN202110442898.8A CN202110442898A CN113153238A CN 113153238 A CN113153238 A CN 113153238A CN 202110442898 A CN202110442898 A CN 202110442898A CN 113153238 A CN113153238 A CN 113153238A
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- China
- Prior art keywords
- block
- fusion
- brake shaft
- fishing head
- elastic claw
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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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
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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
- E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
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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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
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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
- E21B47/00—Survey of boreholes or wells
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- 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)
- Marine Sciences & Fisheries (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
Abstract
The invention discloses a releasable short circuit device for perforation of an oil-gas well, which mainly solves the problems that the traditional short circuit wastes time and labor and has higher cost when underground equipment is separated. The method comprises the following steps: a single core pressure-bearing wire passing device for transmitting signal of telecommunication, upper and lower joint, salvage head, the elasticity jack catch, connecting piece and both ends have the toper recess, inside inserts the cylindrical melting piece of heating rod, the inside heating device that adopts the selection switch that has independent fixed address to control through ground selection control system that sends out that is equipped with of melting piece, it provides heat energy for melting piece, make the melting piece as the weak point of electricity can split under powerful spring thrust, thereby make the elasticity jack catch lose the interior support, further utilize outside hawser pulling force to withdraw from salvage the head, realize the separation release of tie point. The invention avoids the uncertainty of a mechanical weakness release mode, effectively reduces the separation cost of the underground perforating equipment, and realizes the controllable release of the logging instrument string or the perforating gun string when the logging instrument string or the perforating gun string is stuck.
Description
Technical Field
The invention belongs to the technical field of oil and gas exploitation, and further relates to a bridge plug and perforation combined operation technology, in particular to a releasable short-circuit device for perforation of an oil and gas well, which can be used for underground perforation operation.
Background
When the existing bridge plug and perforation combined action meets the situation that a logging instrument or a perforating gun is blocked, the mechanical weakness arranged on the bridle head is broken, and the bridle head is broken forcibly to separate the cable instrument from the perforating gun string. Once the instrument and the perforating gun string are stuck, the instrument and the perforating gun string can not be separated according to the stuck point, the instrument and the perforating gun string can only be integrally reserved in a deep well, and then the separated instrument and the perforating gun string are salvaged, so that time and labor are wasted, and huge loss can be caused.
In the invention patent with application No. 201711039545.3 entitled "a fusible monocable cable release", a fusible monocable cable release is provided that employs electrical weaknesses; the fusing circuit of the device acts under the condition that the instrument string does not work, the fusing and releasing of the cable can ensure that the cable is separated only by 30KG of pulling force, the electronic detonator cannot be mistakenly exploded, and compared with the traditional mechanical weak point breaking, the device is economical and practical; however, this device is designed for connection point release between the cable and the tool, is not structurally suitable for use with a string of logging tools and a perforating gun string, and for a stuck condition at one of the multiple connection points, the device does not controllably separate a portion of a given string of logging tools or perforating gun string based on the stuck point.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a releasable short-circuit device for perforation of an oil-gas well, which controls the release of controllable weak points through a circuit, adopts a selective switch with an independent fixed address to control a fusing circuit, avoids the uncertainty of the traditional mechanical weak point release mode, and realizes the controllable release when a logging instrument string or a perforating gun string meets a card.
To achieve the above object, the present invention comprises:
the single-core pressure-bearing wire passing device comprises a single-core pressure-bearing wire passing device 1, a sealing top ring 2, a lower connector 3, a melt-fracture block lower substrate 4, a melt-fracture block 5, a brake shaft 6, a tightening nut 7, a strong spring 8, a hook positioning hole 9, a liquid inlet hole 10, an elastic claw 11, a middle barrel 12, a fishing head 13, a tightening screw 14, an upper connector 15 and a limiting hole 16;
the single-core pressure-bearing wire passing device 1 is used for transmitting electric signals and is positioned inside the sealing top ring 2;
the sealing top ring 2 is used for blocking external high-pressure liquid;
the fusion splitting block 5 is a cylinder with conical grooves at two ends and a heating rod inserted inside, is clamped between the lower substrate 4 of the fusion splitting block and the brake shaft 6, and is connected with a fusing circuit to form a heating device together; wherein the lower substrate 4 of the fusion-splitting block is fixed by the sealing top ring 2;
the brake shaft 6 is inserted into the lower joint 3, and a strong spring 8 is fixed on the shaft through a tightening nut 7; the thick end of the brake shaft 6 enters the inner hole of the elastic claw 11 through extrusion, and the thin end of the brake shaft is propped against the fusion breaking block 5;
the elastic claw 11 is inserted into an inner hole of the fishing head 13, and a conical boss of the elastic claw 11 is matched with a conical surface of the inner wall of the fishing head 13 to form a stress point; the fishing head 13 and the elastic claw 11 are inserted into the middle barrel 12 together and fixed by tightening screws;
the middle barrel 12 is used for connecting the upper joint 15 and the lower joint 3, and the other ends of the upper joint 15 and the lower joint 3 are respectively used for connecting a first-stage gun barrel and a second-stage gun barrel;
the limiting hole 16 is used for limiting the rotation movement between the middle barrel 12 and the upper joint 15.
Further, the above-mentioned fusion block 5 is obtained as follows: firstly, a copper column is equally divided into four fan-shaped petals with the same size, and then the fan-shaped petals are welded to obtain a whole, wherein the whole is a fusion block.
Further, the thick end of the brake shaft 6 is used for limiting the inward contraction of the elastic claw 11; the thick end can withdraw from the inner hole of the elastic claw 11 under the action of the strong spring 8 and withdraw from the fishing head under the action of external tension, so as to realize separation;
further, the heating device is started through a ground selective-sending control system and used for providing heat energy for the fusion breaking block 5, and after the fusion breaking block 5 is heated to a specified temperature by the heating device, the fusion breaking block is broken under the thrust action of the powerful spring 8, so that the elastic clamping jaws 11 lose the inner support and withdraw from the fishing head through external tension, and separation is realized; the ground selective-sending control system adopts a selective-sending switch with an independent fixed address to control the fusing circuit, so that the heat energy supply of the designated position is completed, and the fixed-point release is realized.
Compared with the prior art, the invention has the following advantages:
firstly, the release of controllable weakness is controlled by a circuit, so that the defects of time and labor waste and large loss when a logging instrument string or a perforating gun string is separated according to mechanical weakness are overcome;
secondly, because the heating device in the fusion block is started through the ground selective-sending control system, and the system adopts the selective-sending switch with an independent fixed address to control the fusion circuit, the heat energy supply at a specified position can be completed, the block point is accurately cut off when the block point meets, the uncertainty of the traditional release mode is avoided, and the controllable release of the logging instrument string or the perforating gun string when the block point meets the block is realized.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view showing a state in which a nugget is broken according to the present invention;
FIG. 3 is a schematic view of the release state of the device of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the overall structure of the invention is schematically illustrated, and the specific structure of the releasable short-circuiting device for perforating oil and gas wells provided by the invention is described, and the device specifically comprises:
the single-core pressure-bearing wire passing device comprises a single-core pressure-bearing wire passing device 1, a sealing top ring 2, a lower connector 3, a melt-fracture block lower substrate 4, a melt-fracture block 5, a brake shaft 6, a tightening nut 7, a strong spring 8, a hook positioning hole 9, a liquid inlet hole 10, an elastic claw 11, a middle barrel 12, a fishing head 13, a tightening screw 14, an upper connector 15 and a limiting hole 16.
The elastic claw 11 is inserted into an inner hole of the fishing head 13, a conical boss of the elastic claw 11 is matched with the conical surface of the inner wall of the fishing head 13, the fishing head 13 and the elastic claw 11 are inserted into the middle barrel together, and the elastic claw 11 is fixed into the middle barrel by the tightening screw 14. A strong spring 8 is fixed to the brake shaft 6 by a tightening nut 7; the brake shaft 6 is inserted into the upper adapter 15, and the thick end of the brake shaft 6 is pressed into the inner hole of the elastic claw 11. The fusion splitting block 5 welded into a whole is a cylinder with conical grooves at two ends, a heating device is arranged in the cylinder, and after the heating device is electrified, the fusion splitting block 5 can be divided into four lobes and loses the supporting force. The fusion-splitting block 5 is clamped between the substrate 4 and the brake shaft 6 under the fusion-splitting block; the sealing top ring 2 fixes the lower substrate 4 of the fusion breaking block; a single-core pressure-bearing wire passing device 1 is reserved inside the sealing top ring 2.
The single-core pressure-bearing wire passing device 1 is used for transmitting electric signals and is positioned inside the sealing top ring 2; the sealing top ring 2 is used for blocking external high-pressure liquid; the fusion-splitting block 5 is a cylinder with conical grooves at two ends and a heating rod inserted into the cylinder, and the fusion-splitting block is formed by uniformly dividing a copper cylinder into four fan-shaped petals with the same size, and then welding the fan-shaped petals to obtain a whole; the fusion-breaking block is clamped between a lower substrate 4 of the fusion-breaking block and a brake shaft 6, wherein the lower substrate 4 of the fusion-breaking block is fixed by a sealing top ring 2; a fusing circuit is connected to the heating rod in the fusing block, and the heating rod and the fusing circuit jointly form a heating device; the heating device is started through a ground selective-sending control system and is used for providing heat energy for the fusion breaking block 5, after the fusion breaking block 5 is heated to a specified temperature by the heating device, the fusion breaking block is broken under the thrust action of the powerful spring 8, so that the elastic clamping jaw 11 loses the inner support and withdraws from the fishing head through external tension, and separation is realized; the ground selective-sending control system adopts a selective-sending switch with an independent fixed address to control the fusing circuit, so that the heat energy supply of the designated position is completed, and the fixed-point release is realized.
The brake shaft 6 is inserted into the lower joint 3, and a strong spring 8 is fixed on the shaft through a tightening nut 7; the thick end of the brake shaft 6 enters the inner hole of the elastic claw 11 through extrusion, and the thin end of the brake shaft is propped against the fusion breaking block 5; the thick end of the brake shaft 6 is used for limiting the inward contraction of the elastic claw 11; the thick end of the fishing rod can be withdrawn from the inner hole of the elastic clamping jaw 11 under the action of the strong spring 8 and withdrawn from the fishing head under the action of external tension, so that separation is realized.
The elastic claw 11 is inserted into an inner hole of the fishing head 13, and a conical boss of the elastic claw 11 is matched with the conical surface of the inner wall of the fishing head 13 to form a stress point; the fishing head 13 and the elastic claw 11 are inserted into the middle barrel 12 together and fixed by tightening screws; the intermediate barrel 12 is located between the upper connector 15 and the lower connector 3, connecting the two connectors, the other ends of the upper connector 15 and the lower connector 3 being used to connect the upper and lower stage barrels, respectively.
And a limiting hole 16 for limiting the rotational movement between the middle barrel 12 and the upper joint 15.
Referring to fig. 2 and 3, when a short-circuit device needs to be separated into two sections, a heating device is started through a ground selective sending control system to heat a fusion-breaking block in the short-circuit device; the melt-fracture block is heated and then is split into four petals under the thrust action of a strong spring; then the thick end of the brake shaft exits from the inner hole of the elastic claw under the action of the spring; and finally, the elastic claw losing the inner supporting force can easily withdraw from the fishing head under the action of external tension, so that separation is realized.
In the normal use process, the releasable short-circuit device provided by the invention can be used as an explosion-proof joint between the conventional gun pipes. When an instrument or gun string meets a clamp in the underground, a designated underground releasable short-circuit device can be controllably released through a selective-sending control system, heat energy is provided for a fusion block through a ground selective-sending control system, the fusion block is split under the action of a spring after reaching a designated temperature, a brake shaft is ejected downwards, a shaft pin at the upper end of the brake shaft exits from an elastic clamping jaw, meanwhile, underground liquid enters a cavity in a joint through a liquid inlet hole, at the moment, pulling force is applied to the outside through a cable, and the lower joint and a middle barrel are pulled apart under the action of the external pulling force; the upper joint and the middle barrel are pulled out of the wellhead under the dragging action of the cable; the upper end of the lower joint is provided with a fishing head which can be taken out by a fishing tool.
In the process of combining the bridge plug and the perforation, the releasable short-circuit device provided by the invention can be used as a common perforation short-circuit device, for example, as a connecting joint between two perforation gun tubes, or a connecting joint between a cable instrument string and the perforation gun tubes, so as to complete perforation operation; if a logging instrument and a perforating gun barrel are blocked or a part of perforating tool strings below the short-circuit device must be released according to process requirements, a ground control panel or a bridge plug is used as a multi-stage selective-sending control system panel to communicate with the underground perforating releasable short circuit and supply power, the heating device capable of releasing the short circuit after power supply can fuse the fuse protector within 120 seconds, and then the short-circuit device is separated into an upper section and a lower section, namely, is in a release state, as shown in fig. 3; with a designated portion left downhole and the remainder lifted uphole with the wireline.
The invention has not been described in detail in part of the common general knowledge of those skilled in the art.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A releasable short circuit device for perforation of an oil and gas well, comprising: the single-core pressure-bearing wire passing device comprises a single-core pressure-bearing wire passing device (1), a sealing top ring (2), a lower connector (3), a lower substrate (4) of a fusion cracking block, the fusion cracking block (5), a brake shaft (6), a tightening nut (7), a strong spring (8), a hook positioning hole (9), a liquid inlet hole (10), an elastic claw (11), an intermediate barrel (12), a fishing head (13), a tightening screw (14), an upper connector (15) and a limiting hole (16);
the single-core pressure-bearing wire passing device (1) is used for transmitting electric signals and is positioned inside the sealing top ring (2);
the sealing top ring (2) is used for blocking external high-pressure liquid;
the fusion splitting block (5) is a cylinder with two conical grooves at two ends and a heating rod inserted inside, is clamped between the lower substrate (4) of the fusion splitting block and the brake shaft (6), and is connected with a fusing circuit to form a heating device together; wherein the lower substrate (4) of the fusion block is fixed by the sealing top ring (2);
the brake shaft (6) is inserted into the lower joint (3), and a strong spring (8) is fixed on the shaft through a tightening nut (7); the thick end of the brake shaft (6) enters the inner hole of the elastic claw (11) through extrusion, and the thin end of the brake shaft is propped against the melting and cracking block (5);
the elastic clamping jaw (11) is inserted into an inner hole of the fishing head (13), and a conical boss of the elastic clamping jaw (11) is matched with the conical surface of the inner wall of the fishing head (13) to form a stress point; the fishing head (13) and the elastic claw (11) are inserted into the middle barrel (12) together and fixed by a tightening screw;
the middle barrel (12) is used for connecting the upper joint (15) and the lower joint (3), and the other ends of the upper joint (15) and the lower joint (3) are respectively used for connecting a first-stage gun barrel and a second-stage gun barrel;
the limiting hole (16) is used for limiting the rotary motion between the middle barrel (12) and the upper joint (15).
2. The apparatus of claim 1, wherein: the fracturing block (5) is obtained as follows: firstly, a copper column is equally divided into four fan-shaped petals with the same size, and then the fan-shaped petals are welded to obtain a whole, wherein the whole is a fusion block.
3. The apparatus of claim 1, wherein: the thick end of the brake shaft (6) is used for limiting the inward contraction of the elastic claw (11).
4. The apparatus of claim 3, wherein: the thick end of the brake shaft (6) can be withdrawn from the inner hole of the elastic claw (11) under the action of the strong spring (8) and withdrawn from the fishing head under the action of external tension, so that separation is realized.
5. The apparatus of claim 1, wherein: the heating device is started through a ground selective-sending control system and is used for providing heat energy for the fracturing block (5).
6. The apparatus of claim 5, wherein: the fusion-splitting block (5) is split under the thrust action of a strong spring (8) after being heated to a specified temperature by a heating device, so that the elastic clamping jaws (11) lose the inner support and withdraw from the fishing head through external tension, and separation is realized.
7. The apparatus of claim 5, wherein: the ground selective-sending control system adopts a selective-sending switch with an independent fixed address to control the fusing circuit, so that the heat energy supply of the designated position is completed, and the fixed-point release is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110442898.8A CN113153238A (en) | 2021-04-23 | 2021-04-23 | Releasable short-circuit device for oil and gas well perforation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110442898.8A CN113153238A (en) | 2021-04-23 | 2021-04-23 | Releasable short-circuit device for oil and gas well perforation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113153238A true CN113153238A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110442898.8A Pending CN113153238A (en) | 2021-04-23 | 2021-04-23 | Releasable short-circuit device for oil and gas well perforation |
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| CN (1) | CN113153238A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882821A (en) * | 2021-10-22 | 2022-01-04 | 大庆市博瑞吉机械设备制造有限公司 | Releasing device and releasing method for oil field downhole delivery tool |
-
2021
- 2021-04-23 CN CN202110442898.8A patent/CN113153238A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113882821A (en) * | 2021-10-22 | 2022-01-04 | 大庆市博瑞吉机械设备制造有限公司 | Releasing device and releasing method for oil field downhole delivery tool |
| CN113882821B (en) * | 2021-10-22 | 2024-04-12 | 大庆市博瑞吉机械设备制造有限公司 | Releasing device and releasing method for underground oil field throwing tool |
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