CN215718583U - Heavy-load throwing and fishing device - Google Patents

Abstract

The utility model provides a heavy-load throwing and fishing device, relates to the technical field of throwing and fishing equipment and aims to solve the technical problem that the existing throwing and fishing device is inconvenient to use; the heavy-load throwing and fishing device comprises a joint, a shaft body, a throwing and fishing claw, a sheath and a second elastic piece; the shaft body is slidably arranged in the joint in a penetrating manner, the joint is provided with a limiting piece, and when the limiting piece is positioned at a limiting position, the shaft body is prevented from sliding towards a first direction; the throwing and fishing claw is arranged on the shaft body and is provided with a clamping part, the clamping part can move towards the second direction and is clamped on the tool, and the first direction is opposite to the second direction; the protective sleeve is provided with a large-diameter hole section and a small-diameter hole section, the throwing and fishing claw can be clamped on the tool in the large-diameter hole section or can be disengaged from the tool, and when the limiting part is disengaged from the limiting position, the second elastic part pushes the shaft body and the throwing and fishing claw to move towards the first direction, so that the throwing and fishing claw is disengaged from the tool. The heavy-load throwing and fishing device can be separated from the tool when the tool is stuck and cannot be taken out, and is convenient to use.

Description

Heavy-load throwing and fishing device

Technical Field

The utility model relates to the technical field of casting and fishing equipment, in particular to a heavy-load casting and fishing device.

Background

In the drilling and downhole operations, the normal drilling, well repairing and well completion operations are interrupted due to the blockage or breakage of a drill rod, a drill collar, a casing pipe and a tubing string, the falling of a cone of a drill bit, the blockage of a logging instrument or a cable, the breakage of a cable steel wire rope, the blockage of a packer, sand setting, serious well leakage, well collapse, well blowout and the like, a throwing and fishing tool is required or special measures are taken to remove leakage, collapse, blockage and blowout so as to recover the normal operations, and the operations and the processes for removing leakage, collapse, blockage and blowout are called 'throwing and fishing'.

When a tool or an instrument with an outer throwing and fishing neck is thrown and fished, a power device generally drives a heavy-load throwing and fishing device to extend into a well, a connecting rod of the heavy-load throwing and fishing device is clamped on the throwing and fishing neck of the tool or the instrument, then the power device drives the heavy-load throwing and fishing device and the tool or the instrument to ascend, and the tool or the instrument is fished out of the well.

However, the use of the existing casting and fishing device is inconvenient.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a heavy-load throwing and fishing device which has a better using effect.

The technical scheme of the utility model is as follows:

the utility model provides a device is salvaged to heavy-duty type, includes the joint that is used for being connected with external power equipment, and it still includes:

the shaft body is slidably arranged in the joint in a penetrating manner, a limiting part is arranged on the joint and comprises a limiting part, and when the limiting part is located at a limiting position, the shaft body is prevented from sliding towards a first direction;

the throwing and fishing claw is arranged on the shaft body and provided with a clamping part, and the clamping part can move towards the second direction and is clamped on a tool to be thrown and fished; wherein the second direction is opposite the first direction;

the sheath is connected with the joint and covers the shaft body and the outer side of the throwing and fishing claw, the inner cavity of the sheath comprises a large-diameter hole section and a small-diameter hole section which are connected in series along the second direction, a first elastic piece is arranged between the joint and the throwing and fishing claw, the first elastic piece applies elastic force to the throwing and fishing claw, and the elastic force pushes the throwing and fishing claw to extend into the small-diameter hole section; when the throwing and fishing claw is arranged on the large-diameter hole section, the clamping part can be clamped on the tool or separated from the tool;

when the throwing and fishing claw is arranged on the small-diameter hole section, the inner wall of the small-diameter hole section limits the clamping part to be clamped on the tool or separated from the tool;

the second elastic piece is abutted between the shaft body and the joint; the thrust exerted by the second elastic piece on the shaft body is greater than the elastic force exerted by the first elastic piece on the throwing and fishing claw; when the limiting part is separated from the limiting position, the second elastic piece pushes the shaft body and the throwing and fishing claw to slide towards a first direction, so that the throwing and fishing claw is separated from the tool.

Further, the joint comprises a body and a mounting seat, and the body is detachably connected with the mounting seat;

the second elastic piece is sleeved on the shaft body and abutted between the shaft body and the mounting seat.

Furthermore, a mounting hole is formed in the side wall of the shaft body, a connecting hole is formed in the side wall of the body, and the connecting hole is opposite to the mounting hole;

the limiting part is a connecting pin which penetrates through the connecting hole and extends into the mounting hole.

Further, the shaft body comprises a shaft body and a pin boss, and the pin boss is detachably sleeved on the shaft body; the mounting hole is formed in the pin boss.

Furthermore, the body comprises a large-diameter shaft section and a small-diameter shaft section which are connected in series, and the connecting hole is formed in the small-diameter shaft section;

the mounting seat is sleeved on the small-diameter shaft section and covers the connecting hole.

Furthermore, the periphery of the small-diameter shaft section is provided with an external thread, the hole wall of the inner hole of the mounting seat is provided with an internal thread, and the external thread is in threaded connection with the internal thread.

Furthermore, the throwing and fishing claw comprises a base body and a plurality of connecting rods; the base body is annular, the connecting rods are fixedly arranged on the end face of one end of the base body, and the connecting rods are arranged around the axis of the base body at intervals;

the clamping part comprises clamping blocks respectively arranged on the inner side surfaces of the connecting rods;

two opposite side surfaces of the clamping block, which are intersected with the first direction, extend obliquely towards the middle of the two side surfaces along the direction from the connecting rods to the centers of the connecting rods.

Further, the second elastic member and the first elastic member are springs, respectively.

The working principle and the beneficial effects of the utility model are as follows:

according to the heavy-load throwing and fishing device, the limiting piece is arranged on the joint, and the limiting part of the limiting piece prevents the shaft body from sliding towards the first direction, so that the throwing and fishing claw on the shaft body can move towards the second direction opposite to the first direction and is clamped on a tool to be thrown and fished, and the tool to be thrown and fished can be taken out by the throwing and fishing claw; and when the instrument was blocked can't take out, the accessible makes spacing portion break away from limit position, and the claw of salvaging of throwing on promotion axis body and the axis body by the second elastic component removes to the second direction, makes throw and drag for the claw and break away from with the instrument to throw the heavy load type and drag for the device and take out, facilitate the use.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the overall structure of a heavy-duty casting and fishing device according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

fig. 4 is an isometric view of an overshooting claw provided in accordance with an embodiment of the utility model;

fig. 5 is a top view of the overshooting claw provided in the embodiments of the present invention;

FIG. 6 is a cross-sectional view taken at D-D of FIG. 5;

fig. 7 is a schematic view of the fishing claw and the tool according to the embodiment of the present invention;

fig. 8 is a partially enlarged view of C in fig. 1.

In the figure: 100-a linker; 110-a body; 111-large diameter shaft section; 112-minor diameter shaft section; 113-connecting hole, 120-mounting seat; 121-step surface; 200-shaft body; 210-a pin boss; 211-mounting hole, 220-shaft body; 221-flange, 300-throwing and fishing claw; 310-a substrate; 320-a connecting rod; 330-a clamping block; 331-a first inclined surface, 332-a second inclined surface, 400-a second elastic member; 500-connecting pins; 600-a tool; 700-a sheath; 710-a large diameter bore section; 720-a transition section; 730-small diameter hole section; 740-stop ring, 800-first elastic element.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.

The embodiment provides a heavy-duty casting and fishing device, and referring to fig. 1, the heavy-duty casting and fishing device comprises a joint 100, a shaft body 200, a casting and fishing claw 300, a sheath 700 and a second elastic element 400; wherein, the joint 100 is used for connecting with external power equipment; the shaft body 200 is slidably inserted into the joint 100, and a limiting member is disposed on the joint 100, the limiting member includes a limiting portion, and when the limiting portion is located at a limiting position, the limiting portion blocks the shaft body 200 from sliding in a first direction; the throwing and fishing claw 300 is arranged on the shaft body 200, and the throwing and fishing claw 300 is provided with a clamping part which can move towards the second direction and is clamped on the tool 600 to be thrown and fished, wherein the first direction is opposite to the second direction;

the sheath 700 is connected with the joint 100 and covers the shaft body 200 and the outer side of the throwing and fishing claw 300, the inner cavity of the sheath 700 comprises a large-diameter hole section 710 and a small-diameter hole section 720 which are connected in series along the second direction, a first elastic element 800 is arranged between the joint 100 and the throwing and fishing claw 300, the first elastic element 800 applies elastic force to the throwing and fishing claw 300, and the throwing and fishing claw 300 is pushed by the elastic force to extend into the small-diameter hole section 720; when the dropping and fishing claw 300 is arranged on the large-diameter hole section 710, the clamping part can be clamped on the tool 600 or separated from the tool 600; when the throwing and fishing claw 300 extends into the small-diameter hole section 720, the inner wall of the small-diameter hole section 720 limits the clamping part to be clamped on the tool 600 or separated from the tool 600;

the second elastic member 400 abuts between the shaft body 200 and the joint 100, and when the second elastic member 400 applies a pushing force to the shaft body 200 and the stopper portion is disengaged from the stopper position, the pushing force pushes the shaft body 200 and the fishing claw 300 to move in the first direction, so that the fishing claw 300 is disengaged from the tool 600.

That is, when the tool 600 is left in the well, the joint 100 of the heavy-duty casting and fishing device can be connected with external power equipment, and the power equipment drives the heavy-duty casting and fishing device to extend into the well; under normal conditions, also when the instrument 600 is not blocked, block axis body 200 by spacing portion and slide to first direction for throw joint portion on fishing claw 300 can the joint on instrument 600, at this moment, can throw heavy load type by power equipment and drag for device and instrument 600 and pull out. In an abnormal situation, that is, when the tool 600 is stuck, the second elastic member 400 pushes the shaft body 200 and the grappling claw 300 to slide in the first direction relative to the joint 100 by separating the limiting part from the limiting position, so that the grappling claw 300 is separated from the tool 600, and thus the heavy-duty grappling device can be taken out by the power equipment when the tool 600 is stuck and cannot be taken out.

Compared with the existing heavy-load throwing and fishing device which cannot be separated from the tool 600, when the heavy-load throwing and fishing device cannot be separated from the tool 600, the heavy-load throwing and fishing device needs to be left in the underground, and when the new throwing and fishing mode is adopted for throwing and fishing the tool 600, the heavy-load throwing and fishing device left in the underground may bring adverse effects to the new throwing and fishing mode.

Under the overall inventive concept of the above-mentioned heavy-duty casting and fishing device, the present embodiment provides a joint 100 with a better structure, specifically, referring to fig. 1 and fig. 2, the joint 100 of the present embodiment includes a body 110 and a mounting seat 120, the body 110 is detachably connected with the mounting seat 120, the second elastic member 400 is sleeved on the shaft 200 and abuts between the shaft 200 and the mounting seat 120, specifically, the body 110 is connected with an external power device, and the structure of the body 110 connected with the external power device may refer to the prior art, and will not be described in detail herein.

That is, the joint 100 of the present embodiment includes a body 110 and a mounting seat 120 detachably connected, the shaft body 200 passes through the mounting seat 120 and extends into the body 110, and the second elastic element 400 is sleeved on the shaft body 200 and abuts between the shaft body 200 and the mounting seat 120. By arranging the joint 100 to include the body 110 and the mounting seat 120 which are detachably connected, the mounting seat 120 and the body 110 can be fixedly connected after the second elastic element 400 is sleeved on the shaft body 200 and penetrates into the body 110, so that the shaft body 200 and the second elastic element 400 can be conveniently installed on the joint 100.

Referring to fig. 1, an inner hole of the mounting base 120 of this embodiment includes a large-diameter section and a small-diameter section connected in series, a step surface 121 is formed between the large-diameter section and the small-diameter section, and the second elastic element 400 is specifically abutted between the step surface 121 and the shaft body 200.

The body 110 of the present embodiment includes a large-diameter shaft section 111 and a small-diameter shaft section 112 connected in series, an external thread is disposed on the outer circumference of the small-diameter shaft section 112, and an internal thread is disposed on the inner wall of the inner hole of the mounting seat 120, and the internal thread is screwed with the external thread. That is, the body 110 and the mounting seat 120 are screwed and fixedly connected with the internal thread of the mounting seat 120 through the external thread of the small diameter shaft section 112.

In some embodiments, the body 110 may not include the large diameter shaft section 111 and the small diameter shaft section 112, that is, the body 110 does not adopt a stepped shaft but adopts a straight shaft, at this time, an external thread may be disposed on the periphery of the body 110, and the fixing of the mounting seat 120 and the body 110 is formed by screwing the mounting seat 120 and the external thread, but when the scheme is adopted, the periphery of the mounting seat 120 protrudes out of the periphery of the body 110, and when the joint 100 moves up and down in a well, the joint is easily blocked by an obstacle in the well, and the use of the heavy-duty casting and fishing device is affected.

In some embodiments, the mounting seat 120 may also be a disk-shaped plug, that is, the body 110 may be a straight cylinder, an internal thread is provided at the end of the inner hole of the body 110, and an external thread is provided on the outer circumference of the mounting seat 120; at this time, the mounting base 120 may be sleeved on the shaft body 200, and the mounting base 120 may be rotated to screw the external threads on the periphery of the mounting base 120 with the internal threads in the inner hole of the body 110, thereby completing the fixed connection between the mounting base 120 and the body 110.

Referring to fig. 1 and 2, in the present embodiment, a mounting hole 211 is provided on a sidewall of the shaft body 200, and a connection hole 113 is provided on a sidewall of the body 110, the connection hole 113 being opposite to the mounting hole 211; the limiting member is a connecting pin 500, and the connecting pin 500 passes through the connecting hole 113 and extends into the mounting hole 211.

That is, the limiting member of the present embodiment is the connecting pin 500, the connecting pin 500 is simultaneously inserted into the connecting hole 113 of the body 110, that is, the joint 100, and the mounting hole 211 of the shaft body 200, and the portion of the connecting pin 500 inserted into the mounting hole 211 constitutes the limiting portion; since the connecting pin 500 is simultaneously inserted into the joint 100 and the shaft body 200, the connecting pin 500 can limit the shaft body 200 from sliding relative to the joint 100 in a first direction, wherein the first direction is an X direction in fig. 1, and the second direction is a Y direction in fig. 1.

In some embodiments, the limiting member may also be a baffle fixed on the inner wall of the joint 100, and the baffle can abut against the end surface of the shaft body 200 to prevent the shaft body 200 from sliding in the first direction. When the limiting member is a baffle, compared with the scheme of the embodiment that the connecting pin 500 is used, on one hand, the baffle is difficult to form on the joint 100, and on the other hand, because the baffle is disposable and cannot be reused, the joint 100 needs to be replaced after the baffle is damaged; in contrast, after connecting pin 500 is broken, only connecting pin 500 may be replaced, and the use of joint 100 is not affected. That is, when the stopper adopts the solution of the connection pin 500, the joint 100 can be reused, and thus, may have a lower cost.

The present embodiment provides a better way to arrange the connecting pin 500, and specifically, the mounting hole 211 of the present embodiment penetrates through the shaft body 200 along the radial direction of the shaft body 200, the connecting hole 113 penetrates through the body 110 along the radial direction of the body 110, and the connecting pin 500 penetrates through the mounting hole 211 from the connecting hole 113 on one side and then extends into the connecting hole 113 on the other side.

In some embodiments, the mounting hole 211 does not penetrate through the shaft body 200, but two opposite blind holes are formed in the outer periphery of the shaft body 200, and through holes opposite to the two blind holes are respectively formed in the outer periphery of the body 110, in this case, two connecting pins 500 are provided, and the two connecting pins 500 respectively penetrate through the corresponding through holes and then extend into the corresponding blind holes.

In the scheme of arranging two blind holes on the periphery of the shaft body 200, two connecting pins need to be installed; in the scheme that the mounting hole 211 penetrates through the shaft body 200, only one connecting pin 500 needs to be mounted, that is, the scheme provided by the embodiment is convenient to mount.

On the basis of the arrangement scheme of the connecting pin 500, the embodiment further provides a better arrangement mode, specifically, referring to fig. 1 and fig. 2, the connecting hole 113 is provided on the small-diameter shaft segment 112, and after the mounting seat 120 is screwed with the small-diameter shaft segment 112, the mounting seat 120 covers the connecting hole 113. Through setting up connecting hole 113 on the path section to cover this connecting hole 113 by mount pad 120, can block connecting pin 500 by mount pad 120, avoid deviating from of connecting pin 500 from the both sides of mount pad 120, thereby can improve this heavily loaded type and throw and drag for the stability in use of device.

In some embodiments, the mounting seat 120 may not cover the connection hole 113, and in this case, the connection pin 500 and the connection hole 113 and the mounting hole 211 need a tighter interference fit, which may increase the difficulty of installing and removing the connection pin 500.

On the basis of the above solution, the present embodiment further provides a shaft body 200 with a better structure, specifically, referring to fig. 1 and fig. 2, the shaft body 200 of the present embodiment includes a shaft body 220 and a pin boss 210, the pin boss 210 is detachably sleeved on the shaft body 220, the mounting hole 211 is disposed on the pin boss 210, and the second elastic element 400 is abutted between the pin boss 210 and the joint 100, that is, between the step surface 121 and the end surface of the pin boss 210.

In this embodiment, the second elastic member 400 is specifically a spring, and the second elastic member 400 is sleeved on the shaft body 220, and has one end abutting against the step surface 121 on the mounting seat 120 and the other end abutting against the end surface of the pin seat 210.

In this embodiment, referring to fig. 2, a blind hole is formed at one end of the pin holder 210, an internal thread is formed on an inner wall of the blind hole, an external thread is formed on an outer periphery of the shaft body 220, and the pin holder 210 and the shaft body 220 can be detachably connected by screwing the internal thread and the external thread.

Because when making spacing portion break away from spacing position, have stronger effort between connecting pin 500 and the key seat 210, may lead to the key seat 210 to damage, through dismantling axle body 220 and key seat 210 in this embodiment and connect, compare in axle body 220 and key seat 210 integrated into one piece, when axle body 220 and key seat 210 can be dismantled and connect, can be through changing the key seat 210 that damages, and need not to change whole axis body 200, make axle body 220 repeatedly usable to can reduce cost.

In this embodiment, the sheath 700 is detachably connected to the joint 100, specifically, as shown in fig. 1, an external thread is disposed on the outer circumference of the mounting seat 120, an internal thread is disposed on the inner wall of the inner cavity of the sheath 700, and the sheath 700 can be fixed on the mounting seat 120 by screwing the internal thread and the external thread.

It should be noted that the sheath 700 may be fixed to the mount 120 by welding, but when the sheath 700 is fixed to the joint 100 by welding, it is inconvenient to detach the sheath 700 from the joint 100.

In this embodiment, referring to fig. 1 and 3, the inner cavity of the sheath 700 further includes a transition section 720 disposed between the large diameter bore section 710 and the small diameter bore section 730, wherein the transition section 720 is tapered to facilitate the movement of the grappling claw between the large diameter bore section 710 and the small diameter bore section 730; the first elastic member 800 abuts against the joint 100 and the throwing and fishing claw 300, the first elastic member 800 applies elastic force to the throwing and fishing claw 300, the elastic force pushes the throwing and fishing claw 300 to extend into the small-diameter hole section 730, and the thrust force applied to the shaft body 200 by the second elastic member 400 is greater than the elastic force applied to the throwing and fishing claw 300 by the first elastic member 800.

That is to say, in this embodiment, when the tool 600 to be thrown and fished is not clamped, the first elastic element 800 pushes the throwing and fishing claw 300 to extend into the small-diameter hole section 730, so as to keep the throwing and fishing claw 300 in a contracted state, thereby preventing the throwing and fishing claw 300 from being opened unexpectedly; and in the process that the throwing and fishing claw 300 moves along the second direction and is connected with the tool 600 in a clamping manner, the tool 600 can push the throwing and fishing claw 300 and compress the first elastic piece 800, so that the throwing and fishing claw 300 moves from the small-diameter hole section 730 to the large-diameter hole section 710, and the throwing and fishing claw 300 can be opened, thereby being connected with the tool 600 in a clamping manner.

In this embodiment, the first elastic member 800 is a spring sleeved on the shaft body 220, one end of the spring abuts against the end surface of the mounting seat 120, and the other end abuts against the end surface of the throwing and fishing claw 300, and it should be noted that other elastic components can be adopted as the first elastic member 800.

Referring to fig. 4 to 6, the grappling claw 300 of the present embodiment specifically includes a base 310 and a plurality of connecting rods 320; the base body 310 is annular, the connecting rods 320 are fixedly arranged on the side surface of one side of the base body 310, and the connecting rods 320 are arranged at intervals around the axis of the base body 310; the clamping portion includes clamping blocks 330 respectively disposed on inner side surfaces of the connecting rods 320; and along the direction from the connecting rod 320 to the center of each connecting rod 320, two opposite side surfaces of each clamping block, which are intersected with the first direction, extend obliquely towards the middle of the two side surfaces.

That is, in the process of moving in the second direction, the side of the clamping block 330, which is first contacted with the tool 600, is an inclined surface which is inclined and extends towards the center of the base 310 and towards the first direction, and for convenience of description, the inclined surface is referred to as a first inclined surface 331 in this embodiment; the side of the clamping block 330 opposite to the first inclined surface 331 extends toward the center of the base 310 and inclines in a second direction, which is referred to as a second inclined surface 332 in this embodiment. The general structure of the tool 600 to be fished is shown in fig. 7, which generally has a fishing neck, that is, an annular groove is provided on the tool 600, each of the clamping blocks 330 can be correspondingly clamped into the groove, wherein the heavy-duty fishing device shown in fig. 7 is in a state of being clamped into the groove on the tool 600.

In this embodiment, referring to fig. 3, a retaining ring 740 is disposed at an end surface of the inner cavity of the sheath 700, and an inner diameter of the retaining ring 740 is smaller than an outer diameter of the casting claw 300 in a contracted state; that is, the catch ring 740 can block the grappling claw 300 from being withdrawn from the sheath 700 in the axial direction of the sheath 700.

In this embodiment, referring to fig. 6 and 8, a flange 221 is provided at an end of the shaft body 220 away from the pin boss 210, and an outer diameter of the flange 221 is larger than a diameter of an inner hole of the base body 310, so that the base body 310, that is, the grappling claw 300, can be prevented from being pulled out from the shaft body 220.

Based on the structure, the use process of the heavy-duty casting and fishing device of the embodiment is as follows:

connecting the joint 100 with an external power device;

the heavy-duty casting and fishing device is driven by power equipment to extend into the well, after the heavy-duty casting and fishing device contacts the tool 600, when the heavy-duty casting and fishing device continues to move towards the second direction, because the inner diameter of each clamping block 330 is smaller than the outer diameter of the tool 600, the tool 600 firstly pushes the casting and fishing claw 300, and the casting and fishing claw 300 compresses the first elastic piece 800, so that the casting and fishing claw 300 has movement towards the first direction relative to the sheath 700; the part of the throwing and fishing claw 300 extending into the small-diameter section hole 730 moves into the large-diameter hole section 710;

after the throwing and fishing claw 300 moves into the large-diameter hole section 710, when the throwing and fishing claw moves towards the second direction relative to the tool 600 again, the tool 600 extrudes the first inclined surface 331 to enable each connecting rod 320 of the throwing and fishing claw 300 to be outwards expanded, and after the clamping blocks 330 on each connecting rod 320 move to be opposite to the grooves on the tool 600, each connecting rod 320 is elastically restored to enable each clamping block 330 to be clamped into the groove;

at this time, the power equipment drives the heavy-duty throwing and fishing device to move upwards, under the action of the first elastic piece 800, the joint 100 and the sheath 700 move towards the first direction firstly until the tail end of the throwing and fishing claw 300 extends into the small-diameter hole section 730 and contacts with the end face of the baffle ring 740, at this time, due to the constraint of the inner wall of the small-diameter hole section 730, each connecting rod 320 cannot be opened outwards, namely, the clamping block 330 can be kept clamped in the groove;

when the power equipment continues to move towards the first direction, the heavy-duty throwing and fishing device and the tool 600 are driven to move towards the first direction, and therefore the tool 600 is taken out of the well.

When the tool 600 is blocked and the power equipment cannot pull the tool 600, the use process of the heavy-load throwing and fishing device is as follows:

the power equipment drives the heavy-duty casting and fishing device to move towards a second direction, namely towards the direction of going deep into the well;

because the tool 600 is clamped and fixed, the tool 600 will push the shaft body 200 or the throwing and fishing claw to keep still,

when the power equipment continues to drive the joint 100 to move towards the second direction, the shaft body 200 is kept fixed, and the connecting pin 500 between the joint 100 and the shaft body 200 is sheared due to overlarge stress;

at this time, the shaft body 200 is pushed by the second elastic element 400 to move in the first direction, after the shaft body 200 moves for a certain distance, the flange 221 on the shaft body 200 impacts the base body 310 of the throwing and fishing claw 300, and then drives the throwing and fishing claw 300 to move in the first direction, the edge of the groove of the tool 600 presses the second inclined surface 332, so that each connecting rod 320 is opened outwards, the shaft body 200 continues to drive the throwing and fishing claw 300 to move upwards, and the throwing and fishing claw 300 is disengaged from the tool 600;

after the grappling claw 300 is disengaged from the tool 600, the power equipment can pull the heavy duty grappling device out of the well.

After the heavy-load throwing and fishing device is pulled out from the well by the power equipment, the tool 600 can be thrown and fished in other replaceable modes, and the heavy-load throwing and fishing device can be taken out of the tool 600 without influencing other throwing and fishing modes.

In summary, in the heavy-duty casting and fishing device provided in this embodiment, the limiting part is disposed on the joint 100, and the limiting part of the limiting part blocks the shaft body 200 from sliding in the first direction, so that the casting and fishing claw 300 on the shaft body 200 can move in the second direction opposite to the first direction and be clamped on the tool 600 to be cast and fished, and the casting and fishing claw 300 can take the tool 600 to be cast and fished; when the tool 600 is blocked and cannot be taken out, the second elastic element 400 pushes the shaft body 200 and the throwing and fishing claw 300 on the shaft body 200 to move towards the second direction by separating the limiting part from the limiting position, so that the throwing and fishing claw 300 is separated from the tool 600, and the heavy-duty throwing and fishing device is taken out and is convenient to use.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a device is salvaged to heavy-duty type, is including being used for the joint of being connected with external power equipment, its characterized in that still includes:

the shaft body is slidably arranged in the joint in a penetrating manner, a limiting part is arranged on the joint and comprises a limiting part, and when the limiting part is located at a limiting position, the shaft body is prevented from sliding towards a first direction;

the throwing and fishing claw is arranged on the shaft body and provided with a clamping part, and the clamping part can move towards the second direction and is clamped on a tool to be thrown and fished; wherein the second direction is opposite the first direction;

the sheath is connected with the joint and covers the shaft body and the outer side of the throwing and fishing claw, the inner cavity of the sheath comprises a large-diameter hole section and a small-diameter hole section which are connected in series along the second direction, a first elastic piece is arranged between the joint and the throwing and fishing claw, the first elastic piece applies elastic force to the throwing and fishing claw, and the elastic force pushes the throwing and fishing claw to extend into the small-diameter hole section; when the throwing and fishing claw is arranged on the large-diameter hole section, the clamping part can be clamped on the tool or separated from the tool; when the throwing and fishing claw is arranged on the small-diameter hole section, the inner wall of the small-diameter hole section limits the clamping part to be clamped on the tool or separated from the tool;

the second elastic piece is abutted between the shaft body and the joint; the thrust exerted by the second elastic piece on the shaft body is greater than the elastic force exerted by the first elastic piece on the throwing and fishing claw; when the limiting part is separated from the limiting position, the second elastic piece pushes the shaft body and the throwing and fishing claw to slide towards a first direction, so that the throwing and fishing claw is separated from the tool.

2. The heavy duty fishing device of claim 1, wherein said joint comprises a body and a mounting, said body and said mounting being removably connected;

the second elastic piece is sleeved on the shaft body and abutted between the shaft body and the mounting seat.

3. The heavy-duty fishing device according to claim 2, wherein a mounting hole is provided on a side wall of the shaft body, a connecting hole is provided on a side wall of the body, and the connecting hole is opposite to the mounting hole;

the limiting part is a connecting pin which penetrates through the connecting hole and extends into the mounting hole.

4. The heavy-duty fishing device according to claim 3, wherein the shaft body comprises a shaft body and a pin seat, the pin seat is detachably fitted on the shaft body; the mounting hole is formed in the pin boss.

5. The heavy-duty casting and fishing device according to claim 3, wherein the body comprises a large-diameter shaft section and a small-diameter shaft section which are connected in series, and the connecting hole is formed in the small-diameter shaft section;

the mounting seat is sleeved on the small-diameter shaft section and covers the connecting hole.

6. The heavy-duty casting and fishing device according to claim 5, wherein the small-diameter shaft section is provided with an external thread on the outer circumference thereof, and the mounting seat is provided with an internal thread on the hole wall of the inner hole thereof, and the external thread is screwed with the internal thread.

7. The heavy-duty casting and salvaging device according to any one of claims 1 to 6, wherein the casting and salvaging claw comprises a base body and a plurality of connecting rods; the base body is annular, the connecting rods are fixedly arranged on the end face of one end of the base body, and the connecting rods are arranged around the axis of the base body at intervals;

the clamping part comprises clamping blocks respectively arranged on the inner side surfaces of the connecting rods;

two opposite side surfaces of the clamping block, which are intersected with the first direction, extend obliquely towards the middle of the two side surfaces along the direction from the connecting rods to the centers of the connecting rods.

8. The heavy-duty fishing device according to any of claims 1 to 6, wherein the second elastic member and the first elastic member are each a spring.

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