CN111350467B

CN111350467B - Fishing auxiliary device

Info

Publication number: CN111350467B
Application number: CN201811569822.6A
Authority: CN
Inventors: 吴胜利; 孟庆伟; 郑利江; 杨高磊; 涂建成; 李得胜; 赵忠亮
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2022-03-29
Anticipated expiration: 2038-12-21
Also published as: CN111350467A

Abstract

The invention discloses a salvaging auxiliary device, and belongs to the field of oilfield exploitation. The device comprises: the fishing device comprises a first connecting sleeve, a motor, a rotating mechanism, a second connecting sleeve, a limiting sleeve, a buckle and a first fishing head; be provided with first cavity in the first adapter sleeve, the motor is located first cavity, the supply end and the outside cable junction of motor, the power take off end and the rotary mechanism and the stop collar of motor connect gradually, the second end of first adapter sleeve is connected with the first end of second adapter sleeve, the stop collar is located the inner chamber of second adapter sleeve, the buckle is located the stop collar inner chamber, the first end of buckle is provided with the latch, the first end of first digging for the head is provided with first draw-in groove, the latch is located first draw-in groove, the second end of first digging for the head is connected with the logging instrument that meets the card. After the power is supplied to the motor through the external cable, the clamping teeth are separated from the first clamping groove. The fishing auxiliary device provides convenient and quick fishing conditions for fishing the logging instrument which is stuck, and is time-saving and labor-saving.

Description

Fishing auxiliary device

Technical Field

The invention relates to the field of oilfield exploitation, in particular to a salvaging auxiliary device.

Background

During the well logging process, it is usually necessary to connect a logging instrument to a cable, then lower the logging instrument to the bottom of the well through the cable to obtain data such as pressure and temperature of the fluid at the bottom of the well, and then transmit the obtained data to a computer device at the surface through the cable. When the data of pressure and temperature of the fluid at the bottom of the well do not need to be obtained, the logging instrument is lifted out of the bottom of the well through the cable. However, during the process of lowering the logging instrument into the bottom of the oil well or during the process of lifting the logging instrument out of the bottom of the oil well, the logging instrument is often stuck, that is, the logging instrument is stuck in the oil well and cannot be lowered or lifted out, and at this time, the logging instrument stuck in the oil well needs to be salvaged.

Generally, the logging tool can be lifted out of the oil well at the stuck site by pulling a cable connected to the logging tool, so as to realize fishing of the stuck logging tool. However, the atress ability of the cable of being connected with the logging instrument is limited, when the pulling force that applys this cable is too big, this cable breaks easily, the logging instrument of coupling part cable is difficult to be caught by fishing tool, thereby the follow-up fishing degree of difficulty to this logging instrument has been increased, and when the cable breaks, this logging instrument falls into the oil well bottom under the effect of gravity easily, thereby need carry out the secondary to this logging instrument and salvage, make the fishing process waste time and energy, efficiency is lower.

Disclosure of Invention

The embodiment of the invention provides a fishing auxiliary device, which can solve the problems that fishing of logging instruments stuck in an oil well is time-consuming and labor-consuming and low in efficiency in the related art. The technical scheme is as follows:

in a first aspect, there is provided a fishing aid, the device comprising: the fishing device comprises a first connecting sleeve, a motor, a rotating mechanism, a second connecting sleeve, a limiting sleeve, a buckle and a first fishing head;

the motor is used for driving the rotating mechanism to rotate around the axial direction when the external cable supplies power, the diameter of the first through hole and the diameter of the second through hole are both smaller than the diameter of an circumscribed circle of the motor, and the second end of the first connecting sleeve is connected with the first end of the second connecting sleeve;

the second end of the rotating mechanism penetrates through the second through hole and is connected with the first end of the limiting sleeve, the limiting sleeve is located in an inner cavity of the second connecting sleeve, the limiting sleeve is used for moving towards the rotating mechanism when the rotating mechanism rotates around the axial direction, the buckle is located in the inner cavity of the limiting sleeve, at least one clamping tooth is arranged on the inner wall of the first end of the buckle, first clamping grooves in one-to-one correspondence with the at least one clamping tooth are formed in the side wall of the first end of the first fishing head, the at least one clamping tooth is located in the corresponding first clamping grooves respectively, the buckle is used for enabling the at least one clamping tooth to be separated from the corresponding first clamping groove when the limiting sleeve moves towards the rotating mechanism, and the second end of the first fishing head is used for being connected with a logging instrument meeting the clamping.

Optionally, the rotating mechanism comprises a transmission shaft and a lead screw, and the device further comprises a pre-tightening spring;

the first end of transmission shaft with the power take off end of motor is connected, the second end of transmission shaft with the first end threaded connection of lead screw, the second end of lead screw with the first end of stop collar is connected, the pretension spring housing is established on the transmission shaft, just the first end of pretension spring with the second end contact of first connecting sleeve, the second end of pretension spring with the first end contact of lead screw, the pretension spring be used for the transmission shaft drives prevent when the lead screw rotates around the axial the lead screw to the direction of transmission shaft removes.

Optionally, the device further comprises a limiting plate and an anti-rotation pin;

the limiting plate is arranged in an inner cavity of the second connecting sleeve, a third through hole is formed in the limiting plate, and the first end of the limiting sleeve penetrates through the third through hole and is connected with the second end of the rotating mechanism;

still be provided with the fourth through-hole on the limiting plate, be provided with the fifth through-hole on the lateral wall of second adapter sleeve, be provided with the spacing groove on the lateral wall of stop collar, the radial of fourth through-hole with the radial parallel of fifth through-hole, the direction of spacing groove with the radial perpendicular of fourth through-hole, the first end of preventing changeing the pin passes the fourth through-hole with the fifth through-hole is located the spacing inslot, prevent changeing the pin and be used for the stop collar to prevent when rotary mechanism's direction removes the stop collar is around axial rotation.

Optionally, a sixth through hole is further formed in the limiting plate, a seventh through hole is further formed in the side wall of the limiting sleeve, a second cavity is formed in the first fishing head, an eighth through hole is formed between the first bottom surface of the second cavity and the first end of the first fishing head, the radial direction of the sixth through hole is parallel to the radial direction of the third through hole, and the device further comprises a third connecting sleeve, a first pressure-bearing sealing plug, a second pressure-bearing sealing plug and a first connector;

the first end of the third connecting sleeve is connected with the second end of the first connecting sleeve, the second end of the third connecting sleeve is connected with the first end of the second connecting sleeve, a ninth through hole and a tenth through hole are arranged in the third connecting sleeve, the second end of the rotating mechanism penetrates through the ninth through hole and is connected with the first end of the limiting sleeve, the outer wall of the first pressure-bearing sealing plug is attached to the inner wall of the tenth through hole, the first end of the first pressure-bearing sealing plug is connected with external data acquisition equipment through a cable, the second end of the first pressure-bearing sealing plug is connected with the first end of the second pressure-bearing sealing plug through a cable which sequentially penetrates through the sixth through hole and the seventh through hole, the outer wall of the second pressure-bearing sealing plug is attached to the inner wall of the eighth through hole, the first connector is located in the second cavity, and the second end of the second pressure-bearing sealing plug is connected with the first end of the first connector through a cable, the second end of the first connector is used for connecting with the logging tool meeting the card.

Optionally, a first installation window is arranged on the side wall of the second connection sleeve, the device further comprises a wire protecting cover plate, the wire protecting cover plate is installed on the second connection sleeve at the position of the first installation window, and the wire protecting cover plate is used for sealing the first installation window.

Optionally, the device further comprises a second fishing head, a fourth connecting sleeve and at least one shear pin;

the first end of the second fishing head is connected with the first end of the first connecting sleeve, the second end of the second fishing head is positioned in the inner cavity of the fourth connecting sleeve, the side wall of the second end of the second fishing head is provided with at least one second clamping groove and at least one blind hole, at least one eleventh through hole is arranged on the side wall of the fourth connecting sleeve and close to the first end of the fourth connecting sleeve, the at least one shear pin, the at least one blind hole and the at least one eleventh through hole are in one-to-one correspondence, and the first end of the at least one shear pin respectively passes through the corresponding eleventh through hole and is positioned in the corresponding blind hole, the at least one shear pin is used for breaking when the fourth connecting sleeve moves towards the direction far away from the second fishing head, so that the second fishing head is separated from the inner cavity of the fourth connecting sleeve.

Optionally, when the device further includes a first pressure-bearing sealing plug, a third cavity is provided in the second fishing head, a twelfth through hole is provided between a first bottom surface of the third cavity and a second end of the second fishing head, the device further includes a second connector, a third pressure-bearing sealing plug, a fifth connecting sleeve, a fourth pressure-bearing sealing plug, and a third connector;

the second connector is positioned in the third cavity, the first end of the second connector is connected with the motor through a cable, the first end of the second connector is further connected with the first end of the first pressure-bearing sealing plug through a cable, the second end of the second connector is connected with the first end of the third pressure-bearing sealing plug through a cable, and the outer wall of the third pressure-bearing sealing plug is attached to the inner wall of the twelfth through hole;

the first end of fifth adapter sleeve with the second end of fourth adapter sleeve is connected, be provided with the fourth cavity in the fifth adapter sleeve, the first bottom surface of fourth cavity with be provided with the thirteenth through-hole between the first end of fifth adapter sleeve, the second end of third pressure-bearing sealing plug with pass through cable junction between the first end of fourth pressure-bearing sealing plug, the outer wall of fourth pressure-bearing sealing plug with the inner wall laminating of thirteenth through-hole, the second end of fourth pressure-bearing sealing plug with pass through cable junction between the first end of third connector, the third connector is located in the fourth cavity, the second end of third connector passes through the cable and is connected with outside data acquisition equipment.

Optionally, a second installation window is arranged on the side wall of the fourth connection sleeve, the device further comprises a pin cover plate, the pin cover plate is installed on the fourth connection sleeve at the position of the second installation window, and the side wall of the pin cover plate is in contact with the second end of the at least one shearing pin.

The technical scheme provided by the embodiment of the invention can at least bring the following beneficial effects:

in the embodiment of the invention, the auxiliary fishing device comprises a first connecting sleeve, a motor, a rotating mechanism, a second connecting sleeve, a limiting sleeve, a buckle and a first fishing head. The first cavity is arranged in the first connecting sleeve, the motor is located in the first cavity, the power supply end of the motor is connected with the external cable, the power output end of the motor is connected with the first end of the rotating mechanism, and when the motor is supplied with power through the external cable, the power output end of the motor can drive the rotating mechanism to rotate around the axial direction. The second end of the first connecting sleeve is connected with the first end of the second connecting sleeve; the second end of the rotating mechanism is connected with the first end of the limiting sleeve, the limiting sleeve is located in the inner cavity of the second connecting sleeve, and when the rotating mechanism rotates around the axial direction, the limiting sleeve can be driven to move towards the rotating mechanism. The buckle is arranged in the inner cavity of the limiting sleeve, at least one clamping tooth is arranged on the inner wall of the first end of the buckle, first clamping grooves in one-to-one correspondence with the at least one clamping tooth are formed in the side wall of the first end of the first fishing head, the at least one clamping tooth is respectively arranged in the corresponding first clamping grooves, when the limiting sleeve moves towards the rotating mechanism, the first end of the buckle, which is arranged in the inner cavity of the limiting sleeve, can be separated from the limiting sleeve, and then the at least one clamping tooth can be separated from the first clamping grooves. When the fishing assisting device is used for assisting in fishing the logging instrument encountering the card, the motor is powered by an external cable connected with the power supply end of the motor, so that at least one latch positioned in the first clamping groove is separated from the first clamping groove, and then a force in the direction far away from the first fishing head is applied to the external cable, so that other components except the first fishing head in the fishing assisting device can be far away from the first fishing head, the first fishing head and the logging instrument encountering the card and connected with the second end of the first fishing head are left in an oil well, further fishing of the logging instrument encountering the card by a subsequent fishing tool through the first fishing head is facilitated.

In a second aspect, there is provided a fishing aid, the device comprising: the second fishing head, the fourth connecting sleeve and at least one shearing pin;

the first end of the second fishing head is used for being connected with a logging instrument meeting a clamp, the second end of the second fishing head is positioned in the inner cavity of the fourth connecting sleeve, the side wall of the second end of the second fishing head is provided with at least one second clamping groove and at least one blind hole, at least one eleventh through hole is arranged on the side wall of the fourth connecting sleeve and close to the first end of the fourth connecting sleeve, the at least one shear pin, the at least one blind hole and the at least one eleventh through hole are in one-to-one correspondence, and the first end of the at least one shear pin respectively passes through the corresponding eleventh through hole and is positioned in the corresponding blind hole, the at least one shear pin is used for breaking when the fourth connecting sleeve moves towards the direction far away from the second fishing head, so that the second fishing head is separated from the inner cavity of the fourth connecting sleeve.

Optionally, a third cavity is arranged in the second fishing head, a twelfth through hole is arranged between a first bottom surface of the third cavity and a second end of the second fishing head, and the device further includes a second connector, a third pressure-bearing sealing plug, a fifth connecting sleeve, a fourth pressure-bearing sealing plug and a third connector;

the second connector is positioned in the third cavity, the first end of the second connector is used for being connected with the logging instrument meeting the card, the second end of the second connector is connected with the first end of the third pressure-bearing sealing plug through a cable, and the outer wall of the third pressure-bearing sealing plug is attached to the inner wall of the twelfth through hole;

in an embodiment of the invention, the fishing aid comprises a second fishing head, a fourth connecting sleeve and at least one shear pin. The first end of the second fishing head is used for being connected with a logging instrument meeting a clamp, the second end of the second fishing head is located in an inner cavity of the fourth connecting sleeve, the side wall of the second end of the second fishing head is provided with at least one second clamping groove and at least one blind hole, the at least one second clamping groove is used for being matched with a fishing tool, the portion, close to the first end of the fourth connecting sleeve, of the side wall of the fourth connecting sleeve is provided with at least one eleventh through hole, the at least one shearing pin and the at least one blind hole are in one-to-one correspondence, the first end of the at least one shearing pin penetrates through the corresponding eleventh through holes and is located in the corresponding blind holes, and when the fourth connecting sleeve moves towards the direction far away from the second fishing head, the at least one shearing pin can break under the action of shearing stress. When using the device to assist the fishing to the logging instrument that meets the card, exert the power of a direction of keeping away from the second fishing head to the fourth adapter sleeve earlier, so that at least one shear pin breaks off under the effect of shear stress, thereby make the second fishing head break away from the fourth adapter sleeve, and then be convenient for follow-up fishing tool salvage the logging instrument that meets the card through the second fishing head, this salvage auxiliary device provides convenient and fast's salvage condition for the salvage of the logging instrument that meets the card, the salvage efficiency of the logging instrument that meets the card has been improved, and labour saving and time saving.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first fishing auxiliary device provided by an embodiment of the invention.

Fig. 2 is a schematic structural diagram of a second fishing auxiliary device provided by the embodiment of the invention.

Fig. 3 is a schematic structural diagram of a third fishing auxiliary device provided by the embodiment of the invention.

Fig. 4 is a schematic structural diagram of a fourth fishing auxiliary device provided by the embodiment of the invention.

Fig. 5 is a schematic diagram of a first pressure-bearing sealing plug according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a fifth fishing auxiliary device provided by the embodiment of the invention.

Fig. 7 is a schematic structural diagram of a sixth fishing auxiliary device provided by the embodiment of the invention.

Fig. 8 is a schematic structural diagram of a seventh fishing auxiliary device provided by the embodiment of the invention.

Fig. 9 is a schematic structural diagram of an eighth fishing auxiliary device provided by the embodiment of the invention.

Fig. 10 is a schematic structural diagram of a ninth fishing auxiliary device provided by the embodiment of the invention.

Fig. 11 is a schematic structural diagram of a tenth fishing auxiliary device provided in the embodiment of the present invention.

Reference numerals:

01: first connecting sleeve, 02: motor, 03: a rotating mechanism, 04: second adapter sleeve, 05: stop collar, 06: fastener, 07: first fishing head, 08: pre-tightening spring, 09: limiting plate, 10: anti-rotation pin, 100: an external cable;

011: first cavity, 012: first through hole, 013: second through hole, 031: drive shaft, 032: lead screw, 041: fifth via, 042: first installation window, 051: limiting groove, 052: seventh through hole, 061: latch, 071: first card slot, 072: second cavity, 073: eighth via, 091: third through hole, 092: fourth through hole, 093: a sixth through hole;

11: third connecting sleeve, 12: first pressure-bearing sealing plug, 13: second pressure-bearing sealing plug, 14: first connector, 15: a wire protecting cover plate;

111: ninth via hole, 112: tenth through hole, 121: connection of first pressure-bearing sealing plug, 122: a sealing portion of a first pressure-bearing sealing plug;

16: second fishing head, 17: fourth connecting sleeve, 18: shear pin, 19: second connector, 20: third pressure-bearing sealing plug, 21: fifth connecting sleeve, 22: fourth pressure-bearing sealing plug, 23: third connector, 24: dowel cover plate, 200: a through wire groove;

161: second card slot, 162: blind hole, 163: third cavity, 164: twelfth through hole, 171: eleventh through hole, 172: second mounting window, 211: fourth cavity, 212: a thirteenth through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a fishing auxiliary device provided by an embodiment of the present invention, specifically, a sectional view of the device. Referring to fig. 1, the device comprises a first connecting sleeve 01, a motor 02, a rotating mechanism 03, a second connecting sleeve 04, a limiting sleeve 05, a buckle 06 and a first fishing head 07; a first cavity 011 is arranged in the first connecting sleeve 01, a first through hole 012 is arranged between the first bottom surface of the first cavity 011 and the first end of the first connecting sleeve 01, a second through hole 013 is arranged between the second bottom surface of the first cavity 011 and the second end of the first connecting sleeve 01, the motor 02 is positioned in the first cavity 011, the power supply end of the motor 02 is connected with an external cable 100 penetrating through the first through hole 012, the power output end of the motor 02 is connected with the first end of the rotating mechanism 03, and the second end of the first connecting sleeve 01 is connected with the first end of the second connecting sleeve 04; the second end of the rotating mechanism 03 penetrates through the second through hole 013 and is connected with the first end of the stop collar 05, the stop collar 05 is located in an inner cavity of the second connecting sleeve 04, the buckle 06 is located in the inner cavity of the stop collar 05, the inner wall of the first end of the buckle 06 is provided with at least one latch 061, the side wall of the first end of the first fishing head 07 is provided with first clamping grooves 071 in one-to-one correspondence with the at least one latch 061, and the at least one latch 061 is located in the corresponding first clamping grooves 071 respectively.

It should be noted that the first cavity 011 disposed in the first connection sleeve 01 can limit the moving space of the motor 02. Specifically, the diameter of the first through hole 012 provided between the first bottom surface of the first cavity 011 and the first end of the first connection sleeve 01, and the diameter of the second through hole 013 provided between the second bottom surface of the first cavity 011 and the second end of the first connection sleeve 01 may both be smaller than the diameter of the circumscribed circle of the motor 02, so that the movement of the motor 02 can only be performed in the first cavity 011.

Because the external cable 100 connected with the power supply end of the motor 02 can not only play a role of supplying power to the motor 02, but also play a role of bearing the weight of the device and the logging instrument encountering the card and connected with the device, and apply a force in a direction away from the logging instrument encountering the card to the external cable 100 connected with the power supply end of the motor 02, the logging instrument encountering the card can be prevented from moving in a direction of the bottom of an oil well under the combined action of the self gravity and the gravity of the device. Therefore, alternatively, the external cable 100 connected to the power supply end of the motor 02 may be a cable having a large bearing force, and the connection between the external cable 100 and the power supply end of the motor 02 may be relatively tight.

In addition, the motor 02 is a member for driving the rotating mechanism 03 to rotate around the axial direction when the external cable 100 supplies power, and the type, size and the like of the motor 02 may be preset according to a use requirement, which is not specifically limited in the embodiment of the present invention.

The rotating mechanism 03 is a member for rotating in the axial direction when the external cable 100 supplies power to the motor 02, and the rotating mechanism 03 rotating in the axial direction can drive the stopper sleeve 05 to move in the direction of the rotating mechanism 03.

It should be noted that the second connecting sleeve 04 is a member for connecting the first connecting sleeve 01 and the first fishing head 07, and can accommodate the rotating mechanism 03, the stop sleeve 05, and the buckle 06.

In addition, the stop collar 05 is a member for moving towards the direction of the rotating mechanism 03 when the rotating mechanism 03 rotates around the axial direction, and the sliding friction force between the outer wall of the stop collar 05 and the inner wall of the second connecting sleeve 04 can be large, so that when the rotating mechanism 03 rotates around the axial direction, the stop collar 05 is not easy to rotate around the axial direction under the action of the large sliding friction force, and the stop collar 05 can move towards the direction of the rotating mechanism 03. In a possible implementation manner, the outer wall of the position limiting sleeve 05 and the inner wall of the second connecting sleeve 04 may be relatively rough, or a plurality of protrusions may be disposed on the outer wall of the position limiting sleeve 05, so as to increase the sliding friction between the outer wall of the position limiting sleeve 05 and the inner wall of the second connecting sleeve 04.

The buckle 06 is a member for disengaging at least one latch 061 from the corresponding first card groove 071 when the stop collar 05 moves in the direction of the rotation mechanism 03. Alternatively, the snap 06 may be made of a material having elasticity, and the diameter of the first end of the snap 06 may be slightly smaller than the diameter of the inner cavity of the stop collar 05. So, when this at least one latch 061 is located corresponding first draw-in groove 071 respectively, can make this at least one latch 061 comparatively inseparable with the contact of first draw-in groove 071 to when stop collar 05 did not move to rotary mechanism 03's direction, this at least one latch 061 is difficult to break away from in first draw-in groove 071. And when the stop collar 05 moves towards the rotating mechanism 03, the first end of the buckle 06 can be easily separated from the inner cavity of the stop collar 05 due to the elastic action of the buckle 06, so that the at least one latch 061 can be easily separated from the first clamping groove 071.

Furthermore, a first engaging groove 071 provided on the side wall of the first end of the first overshot head 07 is used for cooperating with a fishing tool to lift the first overshot head 07 and a logging tool encountering a jam connected to the second end of the first overshot head 07 out of the oil well. Alternatively, the connection of the apparatus to the stuck tool may be made at the surface before the stuck tool is run into the bottom of the well. When the logging tool encounters a jam in the oil well, after the at least one latch 061 is disengaged from the first slot 071, the components of the device except the first fishing head 07 can be lifted out to the surface through the external cable 100 connected to the power supply terminal of the motor 02, leaving only the first fishing head 07 and the logging tool encountering a jam connected to the second terminal of the first fishing head 07. Thereby facilitating subsequent fishing of the logging tool encountering the jam by lowering the fishing tool to the position of the first fishing head 07.

It should be noted that, after the at least one latch 061 is disengaged from the first slot 071, during the process of moving the components of the device except the first fishing head 07 away from the first fishing head 07 through the external cable 100, the latch 06 may move toward the second end of the second connection sleeve 04, and leave the second connection sleeve 04 through the second end of the second connection sleeve 04, and then remain in the oil well, which is inconvenient for the subsequent recycling of the device. Therefore, the inner diameter of the second end of the second connection sleeve 04 may be equal to or smaller than the inner diameter of the first end of the buckle 06, so that the buckle 06 may stay at the second end of the second connection sleeve 04 when moving towards the second end of the second connection sleeve 04, and the buckle 06 cannot leave the second connection sleeve 04. Or, optionally, the device may further include a ferrule, a first end of the ferrule is in contact with the first end of the snap 06, and an inner diameter of the first end of the ferrule is smaller than an inner diameter of the first end of the snap 06, and a second end of the ferrule is connected between the second end of the second connection sleeve 04 and the second end of the first fishing head 07. The ferrule is used for limiting the position of the buckle 06, so that after at least one latch 061 is disengaged from the first clamping groove 071, the buckle 06 cannot move in the direction of the second end of the second connecting sleeve 04, and therefore the buckle 06 cannot be disengaged from the second connecting sleeve 04.

It is to be noted that, since there is liquid in the oil well often, in order to avoid the short circuit of the external cable 100 connected to the power supply terminal of the motor 02 due to the contact with the liquid, the aperture of the first through hole 012 provided between the first bottom surface of the first cavity 011 and the first end of the first connection sleeve 01 may be small, so that the liquid in the oil well is not easy to enter the first cavity 011 through the first through hole 012. So that it is not easily contacted with the external cable 100, and a sealing insulating material such as silicone grease may be injected into the first connection sleeve 01 through the first through-hole 012, thereby performing a sealing insulating function to protect the external cable 100 from being contacted with a liquid in an oil well.

Specifically, when the device is used for assisting in fishing a logging instrument encountering a card, the power can be supplied to the motor 02 through the external cable 100 connected with the power supply end of the motor 02, so that the power output end of the motor 02 rotates, and the rotating mechanism 03 connected with the power output end of the motor 02 is driven to rotate around the axial direction. So, rotary mechanism 03 can drive stop collar 05 and remove to rotary mechanism 03's direction, and at this moment, the first end of the buckle 06 that is located in the inner chamber of stop collar 05 can break away from the inner chamber of stop collar 05 to set up at least one latch 061 on the inner wall of the first end of buckle 06 can break away from in the first draw-in groove 071 that sets up on first fishing head 07. Then, a force in a direction away from the first fishing head 07 is applied to the external cable 100 connected to the power supply end of the motor 02, and the power supply end of the motor 02 indirectly applies a force in a direction away from the first fishing head 07 to the first end of the first connecting sleeve 01 under the driving of the external cable 100. The first connecting sleeve 01 can thus move away from the first overshot 07 with the second connecting sleeve 04 connected to the first connecting sleeve 01, as well as the stop collar 05 and the snap-in button 06 located in the interior of the second connecting sleeve 04, and finally the first overshot 07 and the stuck logging instrument connected to the second end of the first overshot 07 are left in the well. Under the condition, since the first catching groove 071 is arranged on the first catching head 07, a fishing tool capable of being matched with the first catching groove 071 is subsequently lowered to the position of the first catching head 07, and the fishing tool is clamped in the first catching groove 071, so that the logging instrument encountering the card is further fished by the first catching head 07.

It should be noted that, only by supplying power to the motor 02 through the external cable 100 connected to the power supply end of the motor 02, at least one latch 061 located in the first latch groove 071 is disengaged from the first latch groove 071, and then applying a force to the external cable 100 in a direction away from the first fishing head 07, the other components of the device except the first fishing head 07 can be moved away from the first fishing head 07. Thereby with first salvage head 07 and stay the oil well with the logging instrument that meets the card of the second end connection of first salvage head 07 in, and then be convenient for follow-up fishing tool through first salvage head 07 come to meet the logging instrument of card and carry out further salvage, this salvage auxiliary device provides convenient and fast salvage condition for the salvage of the logging instrument that meets the card, has improved the salvage efficiency of the logging instrument that meets the card, and labour saving and time saving.

Wherein, referring to fig. 2, the rotating mechanism 03 may include a transmission shaft 031 and a lead screw 032, a first end of the transmission shaft 031 is connected with the power output end of the motor 02, a second end of the transmission shaft 031 is connected with a first end of the lead screw 032 through a thread, and a second end of the lead screw 032 is connected with a first end of the stop collar 05.

Optionally, the device further includes a pre-tightening spring 08, the pre-tightening spring 08 is sleeved on the transmission shaft 031, a first end of the pre-tightening spring 08 contacts with the second end of the first connection sleeve 01, and a second end of the pre-tightening spring 08 contacts with the first end of the lead screw 032.

It should be noted that the transmission shaft 031 is a member for transmitting power, and the power output end of the motor 02 can transmit power to the first end of the transmission shaft 031, so that the transmission shaft 031 can rotate around the axial direction, and thereby the lead screw 032 connected to the second end of the transmission shaft 031 is driven to rotate around the axial direction.

In addition, in a possible implementation manner, the second end of the transmission shaft 031 is provided with a male thread, and the second end of the lead screw 032 is provided with a female thread, so that the second end of the transmission shaft 031 can be in threaded connection with the first end of the lead screw 032.

Furthermore, in a possible implementation, the second end of lead screw 032 is provided with the male thread, and the first end of stop collar 05 is provided with the female thread, so, can realize that the second end of lead screw 032 is connected with the first end of stop collar 05.

It should be noted that the pre-tightening spring 08 is a member for preventing the lead screw 032 from moving toward the transmission shaft 031 when the transmission shaft 031 drives the lead screw 032 to rotate axially. When the transmission shaft 031 drives the lead screw 032 to rotate around the axial direction, it is very likely to drive the lead screw 032 to move towards the direction of the transmission shaft 031, and at this moment, because the first end of the pre-tightening spring 08 sleeved on the transmission shaft 031 contacts with the second end of the first connecting sleeve 01, the second end of the pre-tightening spring 08 contacts with the first end of the lead screw 032. Therefore, under such a condition, when lead screw 032 moves to the direction of transmission shaft 031, due to the elastic action of pre-tightening spring 08, lead screw 032 can not further move to the direction of transmission shaft 031, thereby when lead screw 032 rotates around the axial direction, stop collar 05 can be driven to move to the direction of transmission shaft 031 more efficiently.

Further, in order to enable the limiting sleeve 05 to move towards the rotating mechanism 03 more efficiently when the rotating mechanism 03 rotates around the axial direction, referring to fig. 3, the device further comprises a limiting plate 09 and an anti-rotation pin 10; the limiting plate 09 is arranged in the inner cavity of the second connecting sleeve 04, the limiting plate 09 is provided with a third through hole 091, and the first end of the limiting sleeve 05 penetrates through the third through hole 091 and is connected with the second end of the rotating mechanism 03; the limiting plate 09 is further provided with a fourth through hole 092, the side wall of the second connecting sleeve 04 is provided with a fifth through hole 041, the side wall of the limiting sleeve 05 is provided with a limiting groove 051, the radial direction of the fourth through hole 092 is parallel to the radial direction of the fifth through hole 041, the direction of the limiting groove 051 is perpendicular to the radial direction of the fourth through hole 092, and the first end of the anti-rotation pin 10 penetrates through the fourth through hole 092 and the fifth through hole 041 and is located in the limiting groove 051.

It should be noted that, in a possible implementation manner, the limiting plate 09 is welded to the inner wall of the second connecting sleeve 04, or the limiting plate 09 is integrally formed with the second connecting sleeve 04. Alternatively, the limiting plate 09 may be perpendicular to the sidewall of the second connecting sleeve 04 to facilitate the installation and removal of the anti-rotation pin 10. In addition, the height of the limiting plate 09 may be lower than the height of the first end of the limiting sleeve 05 and higher than the height of the second end of the buckle 06, and certainly, the height of the limiting plate 09 may be other heights, which is not specifically limited in the embodiment of the present invention.

Optionally, the radial direction of the third through hole 091 formed in the stopper plate 09 may be perpendicular to the stopper plate 09, so that the first end of the stopper sleeve 05 passes through the third through hole 091 to be connected with the second end of the rotating mechanism 03.

In addition, the anti-rotation pin 10 is a component for preventing the stop collar 05 from rotating around the axial direction when the stop collar 05 moves towards the rotating mechanism 03, and the size, the model and the like of the anti-rotation pin 10 may be preset according to the use requirement, which is not specifically limited in the embodiment of the present invention.

Furthermore, the hole diameters of the fourth through hole 092 formed in the limiting plate 09 and the fifth through hole 041 formed in the side wall of the second connecting sleeve 04 may be equal to or slightly smaller than the diameter of the anti-rotation pin 10, so that the anti-rotation pin 10 is in close contact with the inner wall of the fourth through hole 092 and the inner wall of the fifth through hole 041, and the anti-rotation pin 10 is not easy to slip from the fourth through hole 092 and the fifth through hole 041. For example, the bore diameters of the fourth through-hole 092 and the fifth through-hole 041 may be smaller than the diameter of the anti-rotation pin 10 by 1mm, 2mm, etc.

Alternatively, the radial directions of the fourth through hole 092 and the fifth through hole 041 may be aligned to facilitate the installation and removal of the anti-rotation pin 10.

It should be noted that the width of the limiting groove 051 in the direction parallel to the limiting plate 09 may be equal to or slightly smaller than the diameter of the anti-rotation pin 10, so that the limiting sleeve 05 can move towards the rotating mechanism 03 more efficiently, and the length of the limiting groove 051 in the direction perpendicular to the limiting plate 09 may be greater than the diameter of the anti-rotation pin 10. So, prevent changeing pin 10 when stop collar 05 moves to rotary mechanism 03's direction, can restrict the longer of stop collar 05 axial pivoted distance, and then can break away from providing comparatively sufficient space from first draw-in groove 071 for at least one latch 061.

Furthermore, in order to enable the device to obtain data in a logging process from a logging instrument meeting a card, referring to fig. 4, a sixth through hole 093 is further formed in the limiting plate 09, a seventh through hole 052 is further formed in the side wall of the limiting sleeve 05, a second cavity 072 is arranged in the first fishing head 07, an eighth through hole 073 is arranged between the first bottom surface of the second cavity 072 and the first end of the first fishing head 07, the radial direction of the sixth through hole 093 is parallel to the radial direction of the third through hole 091, and the device further comprises a third connecting sleeve 11, a first pressure-bearing sealing plug 12, a second pressure-bearing sealing plug 13 and a first connector 14; the first end of a third connecting sleeve 11 is connected with the second end of a first connecting sleeve 01, the second end of the third connecting sleeve 11 is connected with the first end of a second connecting sleeve 04, a ninth through hole 111 and a tenth through hole 112 are arranged in the third connecting sleeve 11, the second end of a rotating mechanism 03 passes through the ninth through hole 111 and is connected with the first end of a limiting sleeve 05, the outer wall of a first pressure-bearing sealing plug 12 is attached to the inner wall of the tenth through hole 112, the first end of the first pressure-bearing sealing plug 12 is connected with external data acquisition equipment through a cable, the second end of the first pressure-bearing sealing plug 12 is connected with the first end of a second pressure-bearing sealing plug 13 through a cable sequentially passing through a sixth through hole 093 and a seventh through hole 052, the outer wall of the second pressure-bearing sealing plug 13 is attached to the inner wall of an eighth through hole 073, a first connector 14 is positioned in a second cavity 072, the second end of the second pressure-bearing sealing plug 13 is connected with the first end of the first connector 14 through a cable, the second end of the first connector 14 is adapted to connect to a stuck logging tool.

It should be noted that the third connecting sleeve 11 is a member for connecting the first connecting sleeve 01 and the second connecting sleeve 04, and can accommodate the rotating mechanism 03 and the first pressure-bearing sealing plug 12.

It should be noted that when the rotating mechanism 03 comprises the transmission shaft 031 and the lead screw 032, and the device comprises the pre-tightening spring 08, the first end of the pre-tightening spring 08 can be in contact with the second end of the third connecting sleeve 11, and the second end of the pre-tightening spring 08 can be in contact with the first end of the lead screw 032.

In addition, the first pressure-bearing sealing plug 12 is a member for connecting a cable, wherein, referring to fig. 5, the first pressure-bearing sealing plug 12 may include a connecting portion 121 and a sealing portion 122, two ends of the connecting portion 121 are used for connecting the cable, and the connecting portion 121 and the cable may be welded, the sealing portion 122 is used for fitting with an inner wall of the tenth through hole 112, and a diameter of the sealing portion 122 may be slightly smaller than an aperture of the tenth through hole 112, so that the fitting between the sealing portion 122 and the inner wall of the tenth through hole 112 may be tighter, so that the first pressure-bearing sealing plug 12 is not easy to slip from the tenth through hole 112, and liquid in the oil well is prevented from entering an inner cavity of the second connecting sleeve 04 through the tenth through hole 112. The connection portion 121 may be made of a material having high conductivity, and the sealing portion 122 may be made of a material having high sealing property. For example, the connection portion 121 may be made of copper or the like, and the sealing portion 122 may be made of rubber or the like. The structures of the second pressure-bearing sealing plug 13, the third pressure-bearing sealing plug 20 and the fourth pressure-bearing sealing plug 22 which appear later are all similar to the structure of the first pressure-bearing sealing plug 12, and the description of the embodiment of the invention is omitted later.

Furthermore, the diameter of the second pressure-bearing sealing plug 13 can be slightly smaller than the aperture of the eighth through hole 073, so that the second pressure-bearing sealing plug 13 can be attached to the eighth through hole 073 more tightly, the second pressure-bearing sealing plug 13 is not easy to slip from the eighth through hole 073, and the liquid in the oil well is prevented from entering the second cavity 072 through the eighth through hole 073.

It should be noted that the first connector 14 is a member for connecting the second pressure-bearing sealing plug 13 to the logging tool, and in a possible implementation, the first connector 14 may be screwed into the second cavity 072, and the cable may be soldered to the first end of the first connector 14. The second end of first connector 14 can be provided with the contact pin, the position of being connected with the second end of first connector 14 on the logging instrument that meets the card can be provided with this contact pin complex socket, so can realize the second end of first connector 14 and meet being connected between the logging instrument of card, and can set up a plurality of flexure strips on the outer wall of this contact pin, so that the diameter of contact pin is greater than the internal diameter of the entry end of this socket, in the in-process that this contact pin got into this socket, because the diameter of this contact pin is greater than the internal diameter of the entry end of this socket, consequently these a plurality of flexure strips can contract at the position of the entry end of this socket, until this contact pin gets into in the socket completely, these a plurality of flexure strips resume initial condition again, thereby can be in the same place first connector 14 with meet the logging instrument of card comparatively firmly connecting together.

It is worth noting that in order to avoid short circuit caused by liquid in the oil well entering the inner cavity of the second connecting sleeve 04 and contacting with the cable in the inner cavity of the second connecting sleeve 04, a grease injection hole can be arranged on the side wall of the second connecting sleeve 04, and sealing insulating materials such as silicone grease and the like can be injected into the inner cavity of the second connecting sleeve 04 through the grease injection hole, so that the sealing insulating effect is achieved, and the cable in the inner cavity of the second connecting sleeve 04 is not easy to contact with the liquid in the oil well.

As it is common to lower the logging tool through a wireline to the bottom of the well and to obtain data from the logging tool during the logging process through the wireline. Thus, in embodiments of the invention, the connection of the device to the logging tool may optionally be made at the surface before the stuck logging tool is lowered to the bottom of the well, and the logging tool connected to the device may then be lowered to the bottom of the well. Because the second end of the first connector 14 is connected with the logging instrument, the first end of the first connector 14 is connected with the second end of the second pressure-bearing sealing plug 13 through a cable, the first end of the second pressure-bearing sealing plug 13 is connected with the second end of the first pressure-bearing sealing plug 12 through a cable, and the first end of the first pressure-bearing sealing plug 12 is connected with external data acquisition equipment through a cable. Therefore, under the condition that the logging instrument is successfully lowered to the bottom of the oil well, the device can acquire data in the logging process from the logging instrument, and when the subsequent logging instrument encounters a card in the oil well, power can be supplied to the motor 02 through the external cable 100 connected to the power supply end of the motor 02, so that other components in the device except the first fishing head 07 are far away from the first fishing head 07, and the first fishing head 07 and the card-encountering logging instrument connected to the second end of the first connector 14 are left in the oil well, so that the subsequent fishing tool can further fish the card-encountering logging instrument through the first fishing head 07. The device can assist to salvage the logging instrument meeting the card, and can acquire data in the logging process from the logging instrument meeting the card.

In addition, power is supplied to the motor 02 through the external cable 100 connected to the power supply end of the motor 02 to disengage at least one latch 061 from the first latch groove 071, and then a force is applied to the external cable 100 connected to the power supply end of the motor 02 in a direction away from the first fishing head 07, so that the other components of the device except for the first fishing head 07, the second pressure-bearing sealing plug 13 and the first connector 14 are moved in a direction away from the first fishing head 07. In the above process, the cable connected between the first end of the second pressure-bearing sealing plug 13 and the second end of the first pressure-bearing sealing plug 12 is broken due to the fact that the distance between the first pressure-bearing sealing plug 12 and the second pressure-bearing sealing plug 13 is longer and longer, and finally the first fishing head 07 and the logging instrument connected with the second end of the first connector 14 and meeting the card are left in the oil well.

Furthermore, in order to more conveniently detach or mount the cable connected between the first pressure-bearing sealing plug 12 and the second pressure-bearing sealing plug 13, referring to fig. 6, a first mounting window 042 is provided on the sidewall of the second connecting sleeve 04, and the device further includes a wire protecting cover 15, wherein the wire protecting cover 15 is mounted on the second connecting sleeve 04 at the position of the first mounting window 042.

It should be noted that the first mounting window 042 is a window for detaching or replacing a cable connected between the first pressure-bearing sealing plug 12 and the second pressure-bearing sealing plug 13, and the position and the size of the first mounting window 042 may be preset according to a use requirement, which is not specifically limited in the embodiment of the present invention.

In addition, the plate wire protecting cover plate 15 is a member for sealing the first mounting window 042, and the wire protecting cover plate 15 is mounted at the position of the first mounting window 042 on the second connecting sleeve 04, so that liquid in the oil well can be prevented from entering the inner cavity of the second connecting sleeve 04 through the first mounting window 042, and further, the liquid in the oil well is prevented from contacting with the cable to cause short circuit. The size of the wire protecting cover 15 may be larger than that of the first mounting window 042, and the wire protecting cover 15 and the second connecting sleeve 04 may be connected by a screw, or may be connected by other methods, which is not specifically limited in the embodiment of the present invention.

In the process that other components except the first fishing head 07, the second pressure-bearing sealing plug 13 and the first connector 14 move away from the first fishing head 07, the cable connected between the first end of the second pressure-bearing sealing plug 13 and the second end of the first pressure-bearing sealing plug 12 is broken due to the fact that the distance between the first pressure-bearing sealing plug 12 and the second pressure-bearing sealing plug 13 is longer and longer, and the tensile force is larger and larger. After a subsequent fishing tool salvages a logging instrument encountering a jam to the ground through the first fishing head 07, the partially broken cable connected to the second end of the first pressure-bearing sealing plug 12 and the partially broken cable connected to the first end of the second pressure-bearing sealing plug 13 need to be detached, and a new cable is replaced and connected to the second end of the first pressure-bearing sealing plug 12 and the first end of the second pressure-bearing sealing plug 13, so that the device can be recycled. Therefore, the first mounting window 042 is formed in the side wall of the second connecting sleeve 04, so that the cable which is connected to the second end of the first pressure-bearing sealing plug 12 and is partially broken can be conveniently detached and replaced.

Further, referring to fig. 7, the device further comprises a second fishing head 16, a fourth connecting sleeve 17 and at least one shear pin 18; the first end of the second fishing head 16 is connected with the first end of the first connecting sleeve 01, the second end of the second fishing head 16 is located in the inner cavity of the fourth connecting sleeve 17, the side wall of the second end of the second fishing head 16 is provided with at least one second clamping groove 161 and at least one blind hole 162, the part, close to the first end of the fourth connecting sleeve 17, of the side wall of the fourth connecting sleeve 17 is provided with at least one eleventh through hole 171, the at least one shear pin 18 and the at least one blind hole 162 correspond to the at least one eleventh through hole 171 in a one-to-one manner, and the first end of the at least one shear pin 18 penetrates through the corresponding eleventh through hole 171 and is located in the corresponding blind hole 162.

It should be noted that a second slot 161 is disposed on a side wall of the second end of the second fishing head 16 for matching with a fishing tool to fish the logging instrument encountering the second fishing head 16. Optionally, the second catch slot 161 is added closer to the second end of the second fishing head 16 than the at least one blind hole 162 so that a fishing tool may more easily mate with the second catch slot 161 and be fished.

In addition, the at least one blind hole 162 may have an aperture that is equal to or slightly smaller than the diameter of the at least one shear pin 18, and the eleventh through hole 171 may have an aperture that is equal to or slightly smaller than the diameter of the at least one shear pin 18, such that the at least one shear pin 18 is in closer contact with the at least one blind hole 162 and the eleventh through hole 171, such that the at least one shear pin 18 does not easily slip out of the at least one blind hole 162 and the eleventh through hole 171. For example, the at least one blind hole 162 may have an aperture that is 1mm, 2mm, etc. smaller than the diameter of the at least one shear pin 18, and the eleventh through hole 171 may have an aperture that is 1mm, 2mm, etc. smaller than the diameter of the at least one shear pin 18.

Furthermore, the at least one shear pin 18 is configured to break when the fourth connecting sleeve 17 moves away from the second fishing head 16, so that the second fishing head 16 is separated from the inner cavity of the fourth connecting sleeve 17, and the size, the type, and the like of the at least one shear pin 18 may be preset according to a use requirement, which is not specifically limited in the embodiment of the present invention.

It should be noted that, in order to make the fourth connection sleeve 17 move in the direction away from the second fishing head 16, the second end of the fourth connection sleeve 17 may be connected to a cable with a larger bearing capacity, and when the logging instrument encountering a card needs to be assisted to be fished, the cable with the larger bearing capacity may be pulled to make the fourth connection sleeve 17 move in the direction away from the second fishing head 16. At this point, the at least one shear pin 18 can break under the action of the shear stress, so that the second fishing head 16 can be detached from the fourth connecting sleeve 17.

In addition, in a possible implementation, a through-line slot 200 may be provided on the first end of the second fishing head 16, so that the external cable 100 may sequentially pass through the through-line slot 200 and the first through-hole 021 to be connected with the power supply end of the motor 02, and the cable of the external data acquisition device may sequentially pass through the through-line slot 200 and the first through-hole 021 to be connected with the first end of the first pressure-bearing sealing plug 12.

When the motor 02 cannot be supplied with power through the external cable 100 connected to the power supply terminal of the motor 02, a force in a direction away from the second fishing head 16 may be applied to the fourth connection sleeve 17, so that the at least one shear pin 18 is broken under the action of shear stress, thereby disengaging the second fishing head 16 from the fourth connection sleeve 17, and facilitating a subsequent fishing tool to fish a logging instrument encountering a card through the second fishing head 16.

Furthermore, in order to conveniently supply power to the motor 02 and acquire data from a logging instrument in a logging process, referring to fig. 8, when the device further includes the first pressure-bearing sealing plug 12, the second fishing head 16 is provided with a third cavity 163, a twelfth through hole 164 is provided between a first bottom surface of the third cavity 163 and a second end of the second fishing head 16, and the device further includes a second connector 19, a third pressure-bearing sealing plug 20, a fifth connecting sleeve 21, a fourth pressure-bearing sealing plug 22 and a third connector 23; the second connector 19 is positioned in the third cavity 163, the first end of the second connector 19 is connected with the motor 02 through a cable, the first end of the second connector 19 is further connected with the first end of the first pressure-bearing sealing plug 12 through a cable, the second end of the second connector 19 is connected with the first end of the third pressure-bearing sealing plug 20 through a cable, and the outer wall of the third pressure-bearing sealing plug 20 is attached to the inner wall of the twelfth through hole 164; the first end of the fifth connecting sleeve 21 is connected with the second end of the fourth connecting sleeve 17, a fourth cavity 211 is arranged in the fifth connecting sleeve 21, a thirteenth through hole 212 is arranged between the first bottom surface of the fourth cavity 211 and the first end of the fifth connecting sleeve 21, the second end of the third pressure-bearing sealing plug 20 is connected with the first end of the fourth pressure-bearing sealing plug 22 through a cable, the outer wall of the fourth pressure-bearing sealing plug 22 is attached to the inner wall of the thirteenth through hole 212, the second end of the fourth pressure-bearing sealing plug 22 is connected with the first end of the third connector 23 through a cable, the third connector 23 is located in the fourth cavity 211, and the second end of the third connector 23 is connected with external data acquisition equipment through a cable.

It should be noted that the structures of the second connector 19 and the third connector 23 are similar to the structure of the first connector 14, and the description of the embodiment of the present invention is omitted. The cable may be soldered to the second connector 19 and the cable may be soldered to the third connector 23.

In addition, the diameter of the third pressure-bearing sealing plug 20 may be slightly smaller than the diameter of the twelfth through hole 164, so that the third pressure-bearing sealing plug 20 and the twelfth through hole 164 may be attached tightly, so that the third pressure-bearing sealing plug 20 is not easy to slip from the twelfth through hole 164, and the liquid in the oil well is prevented from entering the third cavity 163 through the twelfth through hole 164.

Furthermore, the diameter of the fourth pressure-bearing sealing plug 22 may be slightly smaller than the aperture of the thirteenth through hole 212, so that the fourth pressure-bearing sealing plug 22 and the thirteenth through hole 212 can be attached tightly, the fourth pressure-bearing sealing plug 22 is not easy to slip from the thirteenth through hole 212, and the liquid in the oil well is prevented from entering the inner cavity of the fourth connecting sleeve 17 through the thirteenth through hole 212.

It should be noted that the fifth connecting sleeve 21 is a member for connecting the fourth connecting sleeve 17 and can accommodate the fourth pressure-bearing sealing plug 22 and the third connector 23.

Specifically, the fifth connecting sleeve 21 and the fourth connecting sleeve 17 connected to the second end of the fifth connecting sleeve 21 can be moved away from the second fishing head 16 by applying a force to the fifth connecting sleeve 21 in a direction away from the second fishing head 16, the at least one shear pin 18 is broken under the action of shear stress, and the second fishing head 16 is separated from the fourth connecting sleeve 17, so that the subsequent fishing tool can conveniently fish the logging instrument encountering the stuck well through the second fishing head 16.

It should be noted that the first end of the second connector 19 may be respectively connected to the power supply end of the motor 02 and the first end of the first pressure-bearing sealing plug 12 through cables, the second end of the second connector 19 is sequentially connected to the third pressure-bearing sealing plug 20, the fourth pressure-bearing sealing plug 22 and the third connector 23 through cables, and the second end of the third connector 23 is connected to an external data acquisition device through cables, so that power supply to the motor 02 may be achieved through the external data acquisition device, and data in a logging process may be acquired from a logging instrument that meets a card.

Further, in order to facilitate the removal or installation of the at least one shear pin 18, referring to fig. 9, a second installation window 172 is provided on a sidewall of the fourth connection sleeve 17, the apparatus further includes a pin cover 24, the pin cover 24 is installed on the fourth connection sleeve 17 at the position of the second installation window 172, and the sidewall of the pin cover 24 contacts the second end of the at least one shear pin 18.

It should be noted that the second installation window 172 is a window for detaching or installing the at least one shear pin 18, and the position and the size of the second installation window 172 may be preset according to a use requirement, which is not specifically limited in the embodiment of the present invention.

In addition, the pin cover plate 24 is a member for sealing the second mounting window 172, and the sidewall of the pin cover plate 24 contacts the second end of the at least one shear pin 18, so that when the fourth connection sleeve 17 moves away from the second fishing head 16, and the at least one shear pin 18 breaks under the action of shear stress, the at least one shear pin 18 is prevented from moving to the external space of the fourth connection sleeve 17, so that the at least one shear pin 18 is broken more easily, and the second fishing head 16 is separated from the fourth connection sleeve 17 more quickly. The size of the pin cover plate 24 may be larger than that of the second mounting window 172, and the pin cover plate 24 and the fourth connection sleeve 17 may be connected by screws, or may be connected by other methods, which is not specifically limited in this embodiment of the present invention.

When the fifth connecting sleeve 21 and the fourth connecting sleeve 17 connected to the second end of the fifth connecting sleeve 21 are pulled to move away from the second fishing head 16, the at least one shear pin 18 breaks under the action of shear stress, the second fishing head 16 is detached from the fourth connecting sleeve 17, at this time, at least one partially broken shear pin 18 is present in the at least one blind hole 162, and at least one partially broken shear pin 18 is present in the eleventh through hole 171, under the condition that the at least one partially broken shear pin 18 is removed from the eleventh through hole 171 through the second mounting window 172, after which the second fishing head 16 is lifted out of the oil well, the at least one partially broken shear pin 18 can be removed from the at least one blind hole 162, the eleventh through hole 171 can be realigned with the at least one blind hole 162, and then a new at least one shear pin can be mounted into the at least one blind hole 162 and the eleventh through hole 171 through the second mounting window 172 And (6) a nail 18.

In the embodiment of the invention, the auxiliary fishing device comprises a first connecting sleeve 01, a motor 02, a rotating mechanism 03, a second connecting sleeve 04, a limiting sleeve 05, a buckle 06 and a first fishing head 07. Be provided with first cavity 011 in the first connecting sleeve 01, motor 02 is located first cavity 011, and the power supply end and the outside cable 100 of motor 02 are connected, and the power take off end of motor 02 is connected with rotary mechanism 03's first end, and when supplying power to motor 02 through outside cable 100, rotary mechanism 03 axial rotation can be driven to the power take off end of motor 02. The second end of the first connecting sleeve 01 is connected with the first end of the second connecting sleeve 04; the second end of the rotating mechanism 03 is connected with the first end of the limiting sleeve 05, the limiting sleeve 05 is located in the inner cavity of the second connecting sleeve 04, and when the rotating mechanism 03 rotates around the axial direction, the limiting sleeve 05 can be driven to move towards the rotating mechanism 03. The buckle 06 is located the stop collar 05 inner chamber, the inner wall of the first end of buckle 06 is provided with at least one latch 061, the lateral wall of the first end of first salvage head 07 is provided with the first draw-in groove 071 with at least one latch 061 one-to-one, at least one latch 061 is located the first draw-in groove 071 that corresponds respectively, when the stop collar 05 moved to rotary mechanism 03's direction, the first end of the buckle 06 that is located in the inner chamber of stop collar 05 can break away from the stop collar 05, and then at least one latch 061 can break away from in first draw-in groove 071. When the device is used for assisting in fishing a logging instrument encountering a card, the motor 02 is powered through the external cable 100 connected with the power supply end of the motor 02, so that at least one latch 061 positioned in the first card slot 071 is separated from the first card slot 071, and then applies a force to the outer cable 100 in a direction away from the first overshot 07, the other components of the device than the first overshot 07 can be moved away from the first overshot 07, leaving the first overshot 07 and the stuck logging instrument connected to the second end of the first overshot 07 in the well, further facilitating the subsequent fishing tool to further fish the logging instrument encountering the jam through the first fishing head 07, the fishing auxiliary device provides convenient and fast fishing conditions for fishing the logging instrument meeting the card, improves the fishing efficiency of the logging instrument meeting the card, and saves time and labor.

Fig. 10 is a schematic structural view of another fishing aid provided by an embodiment of the present invention, and referring to fig. 10, the fishing aid includes: a second fishing head 16, a fourth connecting sleeve 17 and at least one shear pin 18; the first end of the second fishing head 16 is used for being connected with a logging instrument encountering a card, the second end of the second fishing head 16 is located in an inner cavity of the fourth connecting sleeve 17, the side wall of the second end of the second fishing head 16 is provided with at least one second clamping groove 161 and at least one blind hole 162, the part, close to the first end of the fourth connecting sleeve 17, of the side wall of the fourth connecting sleeve 17 is provided with at least one eleventh through hole 171, the at least one shear pin 18 and the at least one blind hole 162 are in one-to-one correspondence with the at least one eleventh through hole 171, and the first end of the at least one shear pin 18 penetrates through the corresponding eleventh through holes 171 and is located in the corresponding blind hole 162.

It should be noted that the second fishing head 16, the fourth connecting sleeve 17 and the at least one shear pin 18 have been described in detail in the above embodiments, and the embodiments of the present invention are not described again.

When the device is used for assisting in fishing the logging instrument meeting the card, force in the direction away from the second fishing head 16 can be applied to the fourth connecting sleeve 17 firstly, so that at least one shearing pin 18 is broken under the action of shearing stress, the second fishing head 16 is separated from the fourth connecting sleeve 17, and then a subsequent fishing tool can conveniently fish the logging instrument meeting the card through the second fishing head 16.

Further, referring to fig. 11, a third cavity 163 is disposed in the second fishing head 16, a twelfth through hole 164 is disposed between a first bottom surface of the third cavity 163 and a second end of the second fishing head 16, and the device further includes a second connector 19, a third pressure-bearing sealing plug 20, a fifth connecting sleeve 21, a fourth pressure-bearing sealing plug 22, and a third connector 23; the second connector 19 is located in the third cavity 163, a first end of the second connector 19 is used for being connected with a logging instrument meeting a card, a second end of the second connector 19 is connected with a first end of the third pressure-bearing sealing plug 20 through a cable, and the outer wall of the third pressure-bearing sealing plug 20 is attached to the inner wall of the twelfth through hole 164; the first end of the fifth connecting sleeve 21 is connected with the second end of the fourth connecting sleeve 19, a fourth cavity 211 is arranged in the fifth connecting sleeve 21, a thirteenth through hole 212 is arranged between the first bottom surface of the fourth cavity 211 and the first end of the fifth connecting sleeve 21, the second end of the third pressure-bearing sealing plug 20 is connected with the first end of the fourth pressure-bearing sealing plug 22 through a cable, the outer wall of the fourth pressure-bearing sealing plug 22 is attached to the inner wall of the thirteenth through hole 212, the second end of the fourth pressure-bearing sealing plug 22 is connected with the first end of the third connector 23 through a cable, the third connector 23 is located in the fourth cavity 211, and the second end of the third connector 23 is connected with external data acquisition equipment through a cable.

It should be noted that the second connector 19, the third pressure-bearing sealing plug 20, the fifth connecting sleeve 21, the fourth pressure-bearing sealing plug 22 and the third connector 23 have been described in detail in the above embodiments, and the embodiments of the present invention are not described again.

When the fifth connecting sleeve 21 and the fourth connecting sleeve 17 connected with the second end of the fifth connecting sleeve 21 are pulled to move in a direction away from the second fishing head 16, at least one shear pin 18 is broken under the action of shear stress, so that the second fishing head 16 is separated from the fourth connecting sleeve 17, and a subsequent fishing tool can conveniently fish the logging instrument encountering a card through the second fishing head 16.

In an embodiment of the invention, the fishing aid comprises a second fishing head 16, a fourth connecting sleeve 17 and at least one shear pin 18. The first end of the second fishing head 16 is used for connecting with a logging instrument meeting a jam, the second end of the second fishing head 16 is positioned in the inner cavity of the fourth connecting sleeve 17, the side wall of the second end of the second fishing head 16 is provided with at least one second clamping groove 161 and at least one blind hole 162, the at least one second clamping groove 161 is used for matching with a fishing tool, the part of the side wall of the fourth connecting sleeve 17, which is close to the first end of the fourth connecting sleeve 17, is provided with at least one eleventh through hole 171, the at least one shear pin 18 and the at least one blind hole 162 are in one-to-one correspondence with the at least one eleventh through hole 171, and the first ends of at least one shear pin 18 each pass through a corresponding eleventh through hole 171 and are located in a corresponding blind hole 162, when the fourth connecting sleeve 17 is moved away from the second fishing head 16, the at least one shear pin 18 can break under the effect of shear stress. When using the device to assist the fishing to the logging instrument that meets the card, exert a power of keeping away from the direction of second fishing head 16 to fourth adapter sleeve 17 earlier, so that at least one shearing pin 18 breaks off under the effect of shearing stress, thereby make second fishing head 16 break away from fourth adapter sleeve 17, and then be convenient for follow-up fishing tool salvage the logging instrument that meets the card through second fishing head 16, this salvage auxiliary device provides convenient and fast's salvage condition for the salvage of the logging instrument that meets the card, the salvage efficiency of the logging instrument that meets the card has been improved, and labour saving and time saving.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A fishing aid, the device comprising: the fishing device comprises a first connecting sleeve (01), a motor (02), a rotating mechanism (03), a second connecting sleeve (04), a limiting sleeve (05), a buckle (06) and a first fishing head (07);

a first cavity (011) is arranged in the first connecting sleeve (01), a first through hole (012) is arranged between the first bottom surface of the first cavity (011) and the first end of the first connecting sleeve (01), a second through hole (013) is arranged between the second bottom surface of the first cavity (011) and the second end of the first connecting sleeve (01), the motor (02) is positioned in the first cavity (011), the power supply end of the motor (02) is connected with an external cable penetrating through the first through hole (012), the power output end of the motor (02) is connected with the first end of the rotating mechanism (03), the motor (02) is used for driving the rotating mechanism (03) to rotate around the shaft when the external cable supplies power, and the diameter of the first through hole (012) and the diameter of the second through hole (013) are both smaller than the diameter of the circumscribed circle of the motor (02), the second end of the first connecting sleeve (01) is connected with the first end of the second connecting sleeve (04);

the second end of the rotating mechanism (03) penetrates through the second through hole (013) and is connected with the first end of the stop collar (05), the stop collar (05) is located in an inner cavity of the second connecting sleeve (04), the stop collar (05) is used for moving towards the rotating mechanism (03) when the rotating mechanism (03) rotates around the axial direction, the buckles (06) are located in the inner cavity of the stop collar (05), at least one clamping tooth (061) is arranged on the inner wall of the first end of each buckle (06), first clamping grooves (071) corresponding to the at least one clamping tooth (061) in one-to-one mode are arranged on the side wall of the first end of the first fishing head (07), the at least one clamping tooth (061) is located in the corresponding first clamping groove (071), and the buckles (06) are used for enabling the at least one clamping tooth (061) to be separated from the corresponding first clamping groove (071) when the stop collar (05) moves towards the rotating mechanism (03), the second end of the first dredging head (07) is used for being connected with a logging instrument meeting a jam;

the device also comprises a limiting plate (09) and an anti-rotation pin (10);

the limiting plate (09) is arranged in the inner cavity of the second connecting sleeve (04), a third through hole (091) is formed in the limiting plate (09), and the first end of the limiting sleeve (05) penetrates through the third through hole (091) and is connected with the second end of the rotating mechanism (03);

the limiting plate (09) is further provided with a fourth through hole (092), the side wall of the second connecting sleeve (04) is provided with a fifth through hole (041), the side wall of the limiting sleeve (05) is provided with a limiting groove (051), the radial direction of the fourth through hole (092) is parallel to the radial direction of the fifth through hole (041), the direction of the limiting groove (051) is perpendicular to the radial direction of the fourth through hole (092), the first end of the anti-rotation pin (10) penetrates through the fourth through hole (092) and the fifth through hole (041) and is located in the limiting groove (051), and the anti-rotation pin (10) is used for preventing the limiting sleeve (05) from rotating around the axial direction when the limiting sleeve (05) moves towards the rotating mechanism (03);

the limiting plate (09) is further provided with a sixth through hole (093), the side wall of the limiting sleeve (05) is further provided with a seventh through hole (052), a second cavity (072) is arranged in the first fishing head (07), an eighth through hole (073) is arranged between the first bottom surface of the second cavity (072) and the first end of the first fishing head (07), the radial direction of the sixth through hole (093) is parallel to the radial direction of the third through hole (091), and the device further comprises a third connecting sleeve (11), a first pressure-bearing sealing plug (12), a second pressure-bearing sealing plug (13) and a first connector (14);

the first end of third adapter sleeve (11) with the second end connection of first adapter sleeve (01), the second end of third adapter sleeve (11) with the first end connection of second adapter sleeve (04), be provided with ninth through-hole (111) and tenth through-hole (112) in third adapter sleeve (11), the second end of rotary mechanism (03) passes ninth through-hole (111) and with the first end of stop collar (05) is connected, the outer wall of first pressure-bearing sealing plug (12) with the inner wall laminating of tenth through-hole (112), the first end of first pressure-bearing sealing plug (12) passes through the cable and is connected with outside data acquisition equipment, the second end of first pressure-bearing sealing plug (12) with through passing in proper order between the first end of second pressure-bearing sealing plug (13) the cable junction of sixth through-hole (093) and seventh through-hole (052), the outer wall of the second pressure-bearing sealing plug (13) is attached to the inner wall of the eighth through hole (073), the first connector (14) is located in the second cavity (072), the second end of the second pressure-bearing sealing plug (13) is connected with the first end of the first connector (14) through a cable, and the second end of the first connector (14) is used for being connected with a logging instrument encountering a card.

2. The device according to claim 1, wherein the rotating mechanism (03) comprises a transmission shaft (031) and a lead screw (032), the device further comprising a preloaded spring (08);

the first end of transmission shaft (031) with the power take off end of motor (02) is connected, the second end of transmission shaft (031) with the first end threaded connection of lead screw (032), the second end of lead screw (032) with the first end of stop collar (05) is connected, pretension spring (08) cover is established on transmission shaft (031), just the first end of pretension spring (08) with the second end contact of first connecting sleeve (01), the second end of pretension spring (08) with the first end contact of lead screw (032), pretension spring (08) are used for transmission shaft (031) drive lead screw (032) prevent when rotating around the axle direction lead screw (032) to the direction removal of transmission shaft (031).

3. The device according to claim 1, characterized in that a first mounting window (042) is arranged on the side wall of the second connecting sleeve (04), the device further comprises a wire protecting cover plate (15), the wire protecting cover plate (15) is mounted on the second connecting sleeve (04) at the position of the first mounting window (042), and the wire protecting cover plate (15) is used for sealing the first mounting window (042).

4. A device according to any one of claims 1-3, characterised in that the device further comprises a second fishing head (16), a fourth connecting sleeve (17) and at least one shear pin (18);

the first end of the second fishing head (16) is connected with the first end of the first connecting sleeve (01), the second end of the second fishing head (16) is located in the inner cavity of the fourth connecting sleeve (17), the side wall of the second end of the second fishing head (16) is provided with at least one second clamping groove (161) and at least one blind hole (162), the portion, close to the first end of the fourth connecting sleeve (17), on the side wall of the fourth connecting sleeve (17) is provided with at least one eleventh through hole (171), the at least one shear pin (18), the at least one blind hole (162) and the at least one eleventh through hole (171) are in one-to-one correspondence, the first end of the at least one shear pin (18) respectively penetrates through the corresponding eleventh through hole (171) and is located in the corresponding blind hole (162), and the at least one shear pin (18) is used for moving the fourth connecting sleeve (17) in the direction far away from the second fishing head (16) And then the fishing rod is broken so that the second fishing head (16) is separated from the inner cavity of the fourth connecting sleeve (17).

5. The device according to claim 4, characterized in that when the device further comprises a first pressure-bearing sealing plug (12), a third cavity (163) is arranged in the second fishing head (16), a twelfth through hole (164) is arranged between a first bottom surface of the third cavity (163) and a second end of the second fishing head (16), and the device further comprises a second connector (19), a third pressure-bearing sealing plug (20), a fifth connecting sleeve (21), a fourth pressure-bearing sealing plug (22) and a third connector (23);

the second connector (19) is located in the third cavity (163), the first end of the second connector (19) is connected with the motor (02) through a cable, the first end of the second connector (19) is further connected with the first end of the first pressure-bearing sealing plug (12) through a cable, the second end of the second connector (19) is connected with the first end of the third pressure-bearing sealing plug (20) through a cable, and the outer wall of the third pressure-bearing sealing plug (20) is attached to the inner wall of the twelfth through hole (164);

the first end of the fifth connecting sleeve (21) is connected with the second end of the fourth connecting sleeve (17), a fourth cavity (211) is arranged in the fifth connecting sleeve (21), a thirteenth through hole (212) is arranged between the first bottom surface of the fourth cavity (211) and the first end of the fifth connecting sleeve (21), the second end of the third pressure-bearing sealing plug (20) is connected with the first end of the fourth pressure-bearing sealing plug (22) through a cable, the outer wall of the fourth pressure-bearing sealing plug (22) is attached to the inner wall of the thirteenth through hole (212), the second end of the fourth pressure-bearing sealing plug (22) is connected with the first end of the third connector (23) through a cable, the third connector (23) is located in the fourth cavity (211), and a second end of the third connector (23) is connected with an external data acquisition device through a cable.

6. The device according to claim 4, characterized in that a second mounting window (172) is provided on the side wall of the fourth connecting sleeve (17), the device further comprising a pin cover plate (24), the pin cover plate (24) being mounted on the fourth connecting sleeve (17) at the location of the second mounting window (172), and the side wall of the pin cover plate (24) being in contact with the second end of the at least one shear pin (18).

7. A fishing aid, the device comprising: a second fishing head (16), a fourth connecting sleeve (17) and at least one shear pin (18);

the first end of the second fishing head (16) is used for being connected with a logging instrument encountering a jam, the second end of the second fishing head (16) is positioned in an inner cavity of the fourth connecting sleeve (17), the side wall of the second end of the second fishing head (16) is provided with at least one second clamping groove (161) and at least one blind hole (162), the part, close to the first end of the fourth connecting sleeve (17), of the side wall of the fourth connecting sleeve (17) is provided with at least one eleventh through hole (171), the at least one shearing pin (18) and the at least one blind hole (162) are in one-to-one correspondence with the at least one eleventh through hole (171), the first end of the at least one shearing pin (18) respectively penetrates through the corresponding eleventh through hole (171) and is positioned in the corresponding blind hole (162), and the at least one shearing pin (18) is used for breaking when the fourth connecting sleeve (17) moves towards the direction far away from the second fishing head (16), so that the second fishing head (16) is separated from the inner cavity of the fourth connecting sleeve (17);

a third cavity (163) is arranged in the second fishing head (16), a twelfth through hole (164) is arranged between the first bottom surface of the third cavity (163) and the second end of the second fishing head (16), and the device further comprises a second connector (19), a third pressure-bearing sealing plug (20), a fifth connecting sleeve (21), a fourth pressure-bearing sealing plug (22) and a third connector (23);

the second connector (19) is positioned in the third cavity (163), a first end (191) of the second connector (19) is used for being connected with the logging instrument encountering the card, a second end of the second connector (19) is connected with a first end of a third pressure-bearing sealing plug (20) (192) through a cable, and the outer wall of the third pressure-bearing sealing plug (20) is attached to the inner wall of the twelfth through hole (164);

the first end of the fifth connecting sleeve (21) is connected with the second end of the fourth connecting sleeve (17), a fourth cavity (211) is arranged in the fifth connecting sleeve (21), a thirteenth through hole (212) is arranged between the first bottom surface of the fourth cavity (211) and the first end (211) of the fifth connecting sleeve (21), the second end of the third pressure-bearing sealing plug (20) is connected with the first end of the fourth pressure-bearing sealing plug (22) through a cable, the outer wall of the fourth pressure-bearing sealing plug (22) is attached to the inner wall of the thirteenth through hole (212), the second end of the fourth pressure-bearing sealing plug (22) is connected with the first end of the third connector (23) through a cable, the third connector (23) is located in the fourth cavity (211), and a second end of the third connector (23) is connected with an external data acquisition device through a cable.