CN214836286U

CN214836286U - Releasable short-circuit device for oil-gas well perforation

Info

Publication number: CN214836286U
Application number: CN202120847569.7U
Authority: CN
Inventors: 罗浪; 龙建全; 于天亮
Original assignee: Xi'an Maoze Electronic Technology Co ltd
Current assignee: Xi'an Maoze Electronic Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-11-23
Anticipated expiration: 2031-04-23

Abstract

The utility model discloses a short circuit device that can release for oil gas well perforation mainly solves traditional short circuit when separating downhole equipment, wastes time and energy and the higher problem of cost. 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 utility model discloses avoid the uncertainty of mechanical weakness release mode, effectively reduced the separation cost of perforation equipment in the pit, realized the controllable release when logging instrument cluster or perforating gun cluster meet the card.

Description

Releasable short-circuit device for oil-gas well perforation

Technical Field

The utility model belongs to the technical field of oil and gas exploitation, further relate to bridging plug and perforation combined operation technique, specifically be a short circuit device can release for oil gas well perforation, can be used to the perforation operation in the pit.

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.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a short circuit device can release for oil gas well perforation, through the release of the controllable weak point of circuit control, the adoption has independent fixed address's the selection switch control fusing circuit, has avoided the uncertainty of traditional mechanical weak point release mode, realizes the controllable release when logging instrument cluster or perforating gun cluster meet the card.

In order to achieve the above purpose, the utility model 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 utility model has the following advantage:

firstly, the utility model controls the release of the controllable weakness through the circuit, thereby overcoming the defects of time and labor waste and large loss when the logging instrument string or the perforating gun string is separated according to the mechanical weakness;

second, because the utility model discloses heating device in the schizolysis piece starts through ground selection send out control system, and this system adopts the selection send out on-off control fusing circuit that has independent fixed address, can accomplish the heat energy supply of assigned position, will meet the accurate disconnection of stuck point, has avoided the uncertainty of traditional release mode, has realized the controllable release when logging instrument cluster or perforating gun cluster meet the card.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the state of the middle melting and cracking block of the present invention;

fig. 3 is a schematic view of the release state of the device of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, the utility model discloses an overall structure schematic diagram, right the utility model provides a pair of a concrete structure of short circuit device can release for oil gas well perforation describes, and the device specifically includes:

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 utility model provides a short circuit device can release can be used as the flame proof joint between conventional rifle pipe and use. 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 utility model 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 non-detailed description of the present invention is within the common general knowledge of those skilled in the art.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

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 releasable shorting device 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 releasable shorting device 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 releasable shorting device 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 releasable shorting device 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 releasable shorting device as recited in 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 releasable shorting device as recited in 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.