CN211422574U

CN211422574U - Fishing device and fishing spear thereof

Info

Publication number: CN211422574U
Application number: CN201921789662.6U
Authority: CN
Inventors: 杨一迪; 刘浩; 刘云云; 王龙瓛; 王守义; 赵建军; 穆潇; 赵扬扬; 任广磊; 李雪晴; 王菁玫
Original assignee: China Petroleum and Chemical Corp; Sinopec North China Oil and Gas Co
Current assignee: China Petroleum and Chemical Corp; Sinopec North China Oil and Gas Co
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2020-09-04
Anticipated expiration: 2029-10-23

Abstract

The utility model relates to an oil gas field salvages equipment field, in particular to fishing device and fishing spear thereof, should drag for the lance and include: a salvaging body which is provided with a salvaging spear and is used for salvaging the steel wire; the fishing head is fixedly arranged on the fishing body and comprises a head part and a neck part; the neck is provided with an outer wall groove and is used for corresponding to an inner wall groove on a fishing sleeve of the primary fishing tool string to install a rubber piece, so that the primary fishing tool string is connected with the fishing spear, and the rubber piece is extruded to generate elastic deformation when the set pressure is reached, so that the fishing spear is separated from the primary fishing tool string; the head for with the cooperation of the joint hook of secondary fishing tool cluster to realize that secondary fishing tool cluster is connected with the fishing spear. Set up the rubber spare through the outer wall recess at fishing head and fishing sleeve's inner wall recess, when meeting when hindering at the fishing in-process, the rubber spare receives the extrusion to take place elastic deformation and makes fishing head and fishing sleeve separation, avoids causing the secondary operation accident, conveniently implements the secondary and salvages.

Description

Fishing device and fishing spear thereof

Technical Field

The utility model relates to an oil gas field salvages equipment field, in particular to fishing device and fishing spear thereof.

Background

At present, the steel wire is frequently used for logging test operation and throwing and fishing operation in the development process of an oil-gas field, but the used steel wire often falls into an oil well in the test process, so that a special fishing tool is needed for steel wire fishing.

The application publication No. CN103573204A discloses a fisher for falling steel wires of an over-diameter-variable pipe column, which comprises a central rod, namely a fishing spear, wherein a fishing hook is arranged on the central rod, when fishing operation is carried out, the steel wire head is bent by the impact force formed by the central rod on the steel wire, and then the fishing hook on the central spear is used for catching the steel wire head to fish the steel wire. When the fisher is matched with a fishing tool string for fishing, if the fisher is blocked, the fishing tool string cannot be lifted, so that secondary accidents are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a salvaging device to solve the technical problem that when the prior salvaging device is matched with a salvaging tool string for salvaging, if the salvaging tool string can not be lifted up when the salvaging device is blocked, secondary accidents are caused; an object of the utility model is also to provide a fishing spear for this fishing device.

In order to achieve the purpose, the utility model discloses the technical scheme of fishing for the lance is:

the fishing spear includes: a salvaging body which is provided with a salvaging spear and is used for salvaging the steel wire; the fishing head is fixedly arranged on the fishing body and comprises a head part and a neck part; the neck is provided with an outer wall groove and is used for corresponding to an inner wall groove on a fishing sleeve of the primary fishing tool string to install a rubber piece, so that the primary fishing tool string is connected with the fishing spear, and the rubber piece is extruded to generate elastic deformation when the set pressure is reached, so that the fishing spear is separated from the primary fishing tool string; the head for with the cooperation of the joint hook of secondary fishing tool cluster to realize that secondary fishing tool cluster is connected with the fishing spear.

The beneficial effects are that: the neck through at fishing head sets up the outer wall recess, makes the inner wall recess cooperation that sets up on its and fishing sleeve of fishing tool cluster, installs the rubber spare between inner wall recess and outer wall recess in order to realize fishing head and the connection of a fishing tool cluster, and then realizes the connection of a fishing tool cluster and fishing spear, makes fishing spear lift and transfer along with a fishing tool cluster to salvage the steel wire in the well. When a fishing steel wire of the fishing spear is blocked, the tensile force of the primary fishing tool string is increased, so that the rubber piece is extruded under set pressure to generate elastic deformation, and the primary fishing tool string is separated from the fishing spear; after the fishing tool string is separated from the fishing tool string, the primary fishing tool string is firstly lifted, and the fishing head is exposed at the moment, so that the secondary fishing tool string is conveniently put into the fishing tool string to carry out secondary fishing operation, and secondary accidents are avoided.

Further, the outer wall groove is an outer wall annular groove arranged along the circumferential direction of the fishing head, the corresponding inner wall groove is an inner wall annular groove arranged along the circumferential direction of the fishing sleeve, and the rubber part is a rubber ring.

The beneficial effects are that: the outer ring groove is formed into the outer wall ring groove, the inner wall groove is formed into the inner wall ring groove, and the rubber rings are placed in the outer wall ring groove and the inner wall ring groove, so that the connector and the circumferential circle of the fishing sleeve of the primary fishing tool string are connected through the rubber rings, and the connection stability is ensured.

Furthermore, the outer wall annular groove is provided with at least two along the axial direction of the fishing head.

The beneficial effects are that: through setting up a plurality of outer wall annular grooves to all install the rubber circle in every outer wall annular groove, with the stability of guaranteeing the fishing sleeve connection of fishing spear and fishing tool cluster.

Furthermore, the neck still is equipped with along its radial extension shear pin perforation for should link up with the dress shear pin in order to wear to adorn with the corresponding shear pin hole on the fishing sleeve of fishing tool cluster, and then realize the connection of fishing tool cluster and fishing spear once.

The beneficial effects are that: through shear pin and rubber spare cooperation, further improve the stability of salvaging the muffjoint of spear and fishing tool cluster.

Further, the fishing body includes: the fishing head is fixedly arranged on the supporting sleeve; the rotary body is assembled in the supporting sleeve, a spiral mechanism for driving the rotary body to rotate in the supporting sleeve when the rotary body is axially jacked is arranged between the rotary body and the supporting sleeve, and the supporting sleeve is provided with a blocking platform for supporting and matching with the rotary body so as to prevent the support body from falling off downwards; the supporting piece can be popped outwards and retracted inwards and is movably assembled on the revolving body in a reciprocating way, and the support piece popped outwards is used for being supported on the supporting sleeve; the elastic element is arranged on the revolving body and applies elastic acting force for forcing the supporting element to be outwards popped; the fishing spear is fixedly connected to the revolving body so as to be driven by the revolving body to rotate, so that the fished steel wire is wound on the fishing spear; when the revolving body is assembled with the supporting sleeve, the supporting piece is retracted inwards to enable the revolving body to be assembled in the supporting sleeve in a reverse revolving mode, and when the revolving body rotates forwards for a set angle to move upwards to a set position, the supporting piece is driven to pop out by the elastic piece.

The beneficial effects are that: during the use, receive the ascending axial roof pressure force of steel wire at the solid of revolution after, the solid of revolution is gyration in the supporting sleeve under screw mechanism's effect to it is rotatory to drive the lance of dragging for, thereby twine the steel wire on dragging for the lance, so that snatch the steel wire, the solid of revolution drives simultaneously and drags for lance upward movement, in order to drive the steel wire and enter into the supporting sleeve, has guaranteed to drag for the lance and has snatched the stability of steel wire. In addition, the solid of revolution upwards rotates behind the settlement angle, and the support piece that sets up on it stretches out under the elastic force of elastic component to support on the support sleeve, guarantee the fastness of steel wire winding on fishing spear.

Further, the supporting part is a stop pin which is popped out outwards and shrunk inwards along the radial direction of the revolving body.

The beneficial effects are that: the stop pin is outwards popped out and inwards contracted along the radial direction of the revolving body, so that the stop pin can conveniently stretch out and draw back in the revolving body.

Further, drag for the lance and drag for the lance in the center, the support sleeve lower extreme sets firmly around the outer lance of dragging for of center drag for lance equipartition, outer lance orientation drag for the inside of center drag for the lance is equipped with the outer hook of dragging for that the slope upwards extends.

The beneficial effects are that: set up outer bailing spear around central bailing spear, and set up outer fishing hook on outer bailing spear, at the solid of revolution area central bailing spear gyration in-process, the steel wire winding is on central bailing spear and outer fishing hook, makes central bailing spear and outer fishing hook snatch the steel wire jointly, effectively improves salvage operation success rate.

Further, the supporting sleeve comprises an upper sleeve and a lower sleeve detachably connected with the upper sleeve, the fishing head is arranged on the upper sleeve, and the revolving body is assembled in the lower sleeve.

The beneficial effects are that: the supporting sleeve comprises an upper sleeve and a lower sleeve which are detachably connected, so that the revolving body can be conveniently installed in the lower sleeve.

Further, the screw mechanism meets the requirement that after the revolving body rotates for a set angle, the supporting piece is exposed from the lower sleeve and springs outwards under the elastic force of the elastic piece so as to be supported on the upper end face of the lower sleeve.

The beneficial effects are that: the upper end face of the lower sleeve supports the supporting piece, so that a supporting piece inserting groove matched with the supporting piece is omitted on the inner wall of the lower sleeve, and the structure is simplified.

In order to achieve the above purpose, the utility model discloses fishing device's technical scheme is:

fishing device includes fishing spear and fishing tool cluster once, fishing tool cluster includes fishing sleeve once, is equipped with the inner wall recess on the fishing sleeve, fishing spear includes: a salvaging body which is provided with a salvaging spear and is used for salvaging the steel wire; the fishing head is fixedly arranged on the fishing body and comprises a head part and a neck part; the neck is provided with an outer wall groove and corresponds to the inner wall groove to mount a rubber piece, so that the connection between the primary fishing tool string and the fishing spear is realized, and the rubber piece is extruded to generate elastic deformation when the set pressure is reached, so that the fishing spear is separated from the primary fishing tool string; the head for with the cooperation of the joint hook of secondary fishing tool cluster to realize that secondary fishing tool cluster is connected with the fishing spear.

Further, be equipped with the shear pin hole on the salvage sleeve, the neck still is equipped with along its radial extension shear pin perforation, this shear pin perforation with the shear pin hole pair should link up in order to wear to adorn the shear pin, and then realizes once the connection of fishing tool cluster and fishing spear.

Drawings

FIG. 1 is a schematic structural view of a fishing device according to an embodiment 1 of the present invention before fishing;

FIG. 2 is a schematic structural view of the fishing device of the present invention in the embodiment 1 after fishing;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a bottom view of the fishing tool string of FIG. 1;

fig. 5 is a schematic structural view of embodiment 2 of the fishing device before fishing according to the present invention:

in the figure: 1-fishing head; 2-upper sleeve; 3-a solid of revolution; 4-lower sleeve; 5-stop pin; 6-blocking the platform; 7-a circumferential guiding surface; 8-fishing out the spear; 9-outer fishing hook; 10-inner fishing hook; 11-a central fishing spear; 12-inner wall annular groove; 13-one fishing tool string; 14-a rubber ring; 15-outer wall annular groove; 16-shear pin.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

The utility model discloses a concrete embodiment 1 of fishing device, as shown in fig. 1 and fig. 3, fishing device includes fishing tool cluster 13 and fishing spear once, and fishing spear includes the support sleeve that extends along upper and lower direction, is provided with solid of revolution 3 in the support sleeve, and solid of revolution 3's lower extreme fixedly connected with fishing spear to drive fishing spear rotation when solid of revolution 3 revolves. The fishing spears on the revolving body 3 are central fishing spears 11 relative to the outer fishing spears 8, and the outer fishing spears 8 are uniformly distributed with four fishing spears 11 around the central fishing spears.

Specifically, be equipped with on the center bailing spear 11 along upper and lower direction and be equipped with in the five levels fishhook 10, the quantity of fishhook 10 in every level is four and evenly distributed on the circumference of center bailing spear 11, is equipped with outer fishhook 9 on the outer bailing spear 8, and outer fishhook 9 on each outer bailing spear 8 is equipped with the level four, from the top down in proper order align to grid, and the directional inboard of direction to fishhook 10 salvages the steel wire in the cooperation.

The supporting sleeve comprises a lower sleeve 4 and an upper sleeve 2 assembled on the lower sleeve 4 through threads, a fishing head 1 is fixedly connected to the upper surface of the upper sleeve 2, the fishing head 1 is connected with an upper fishing tool in series during fishing, and the revolving body is assembled in the lower sleeve 4. In other embodiments, the lower sleeve is welded and fixed on the upper sleeve, and at the moment, a top cover of the upper sleeve needs to be opened, so that the revolving body is conveniently installed in the lower sleeve; or the lower sleeve is detachably connected with the upper sleeve through a flange.

In this embodiment, the lower end of the lower sleeve 4 is welded with the baffle table 6, and the baffle table 6 is in supporting fit with the revolving body 3 to prevent the revolving body 3 from moving downwards. The lower side of the abutment 6 is provided with a circumferential guiding surface 7, preferably an arc-shaped guiding surface, at the periphery of the central spear 11, the radial dimension of the circumferential guiding surface 7 decreasing from bottom to top to guide the steel wire to be fished under the rotator 3 and press the rotator 3 in the axial direction. The four outer fishing spears 8 are fixedly connected with the lower side surface of the baffle table 6. In other embodiments, the abutment is welded to the inner side wall of the lower sleeve and the circumferential guide surface is provided on the underside of the lower sleeve.

As shown in fig. 1 and 2, a spiral guide groove is formed on the inner wall of the lower sleeve 4, an external fitting structure which is matched with the spiral guide groove on the lower sleeve 4 is arranged on the rotation surface of the rotation body 3, the external fitting structure is a spiral protrusion, and the spiral guide groove and the spiral protrusion form a spiral mechanism. Can rotatory the rising under screw mechanism's guide when the solid of revolution 3 receives ascending axial roof pressure effort, because center drag for lance 11 fixed connection on the solid of revolution 3, drive center drag for lance 11 rotatory the rising when the solid of revolution 3 rotatory the rising to with the steel wire winding on center drag for lance 11.

In this embodiment, the lower portion of the rotator 3 is formed with a long hole extending in the radial direction, and the long hole is provided therein with a stopper pin 5 capable of extending and retracting in the radial direction and a compression spring for applying an elastic force to the stopper pin 5 to extend the stopper pin 5 outward out of the rotator 3, wherein the stopper pin constitutes a support member and the compression spring constitutes an elastic member. One end of the stop pin 5, which is far away from the pressure spring, is provided with a hemispherical head, and the diameter of the hemispherical head is larger than the width of the spiral guide groove on the lower sleeve 4, so that the friction is favorably reduced; meanwhile, after the revolving body 3 rotates and rises for a set angle, the lower sleeve 4 does not stop the stop pin 5, the stop pin 5 extends out of the revolving body 3, and the hemispherical head of the stop pin 5 can guide the stop pin 5 to the upper end face of the lower sleeve 4, so that the guiding effect is achieved. It should be noted that the upper end surface of the lower socket is a support end surface for blocking the stopper pin 5 in the up-down direction so that the rotation body 3 is supported on the lower socket 4. In order to meet the stability, the number of the stop pins is two, and the number of the corresponding pressure springs is two. The stop pin 5 is a brittle member, and is generally made of aluminum, copper, carbon steel or the like.

In this embodiment, backing pin 5 has big footpath section and path section, and big footpath section and pressure spring roof pressure cooperation, path section be used for with the up end support cooperation of lower sleeve 4, be equipped with in the slot hole and be used for 5 spacing limiting plates to backing pin to avoid the backing pin transition to pop out, the limiting plate has the perforation that supplies the path section to pass, the spacing cooperation of the medial surface of limiting plate and the lateral surface of big footpath section. In other embodiments, no limiting plate may be provided, and one end of the pressure spring is fixed to the bottom of the long hole and the other end is fixed to the stop pin.

As shown in fig. 1 and 4, the fishing head 1 is connected to a primary fishing tool string 13. Specifically, an inner wall annular groove 12 extending along the circumferential direction of the fishing sleeve is arranged on the fishing sleeve at the lower part of the primary fishing tool string 13, a neck of the fishing head 1 is provided with an outer wall annular groove 15, the outer wall annular groove 15 and the inner wall annular groove 12 are provided with a rubber ring 14, and the fishing head 1 is connected with the primary fishing tool string 13 through the rubber ring 14 arranged between the outer wall annular groove 15 and the inner wall annular groove 12. During specific assembly, pack into the outer wall annular groove 15 of fishing head 1 with rubber ring 14 earlier, then with the salvage sleeve suit of a fishing tool cluster 13 lower part on fishing head 1, rubber ring 14 takes place elastic deformation during the suit, because rubber ring 14's elasticity is great, therefore, need great power just can be with salvage sleeve suit on fishing head 1, and when inner wall annular groove 12 on salvage sleeve aligns with outer wall annular groove 15 on fishing head 1, rubber ring 14 resumes the original state and blocks in inner wall annular groove 12, in order to realize salvage sleeve and fishing head 1's being connected. It should be noted that the outer wall annular groove constitutes an outer wall ring groove, the inner wall annular groove constitutes an inner wall groove, and the rubber ring constitutes a rubber member. In other embodiments, the outer wall annular is provided with at least two along the circumference of fishing head, the inner wall annular is provided with at least two along fishing sleeve's circumference, inner wall annular and outer wall annular one-to-one to be used for placing the block rubber, at this moment, the fishing spear is connected through the block rubber with a fishing tool cluster, wherein in order to avoid the block rubber to drop in assembling process, can fix the block rubber in inner wall annular or outer wall annular in advance, if through sticky mode or screw fixation mode, when using the screw fixation, the length of screw can not be greater than the groove depth. It should be noted that the rubber ring and the rubber block are made of high-elasticity rubber to ensure the connection force, and both the rubber block and the rubber ring can be reused, but before use, whether cracks or aging phenomena exist needs to be checked.

In this embodiment, one outer wall annular groove 15 is provided along the axial direction of the fishing head 1, and one corresponding inner wall annular groove 12 is provided. Of course, in other embodiments, more than two can be arranged along the axial direction of the fishing head according to the requirement.

When the fishing spear is used for fishing, the upper sleeve 2 is screwed off from the lower sleeve 4, then the revolving body 3 with the central fishing spear 11 is arranged in the lower sleeve 4, at the moment, the stop pin 5 is required to be contracted into the revolving body 3 by overcoming the elastic action force of the pressure spring, then the revolving body 3 is rotated downwards until the lower end of the revolving body 3 is pressed on the stop table 6, and then the upper sleeve 2 is screwed on the lower sleeve 4 again, as shown in fig. 1. The fishing head 1 on the upper sleeve 2 is connected with a fishing tool string 13, a weighting rod is arranged on the fishing tool string 13, the fishing tool string 13 is placed firstly, the steel wire is detected to be blocked until the fishing spear, then the fishing tool string 13 is lifted for one time to 20 meters and then the fishing tool string 13 is loosened again, the fishing spear drops under the action of gravity of the weighting rod, the steel wire is guided to the lower part of the revolving body 3 through the circumferential guide surface 7 after the steel wire is detected, the revolving body 3 is rotationally lifted after being jacked by the steel wire axial direction revolving body, meanwhile, the central fishing spear 11 on the revolving body 3 drives the steel wire to rotate, the steel wire is wound on the staggered central fishing spear 11, and the fishing success rate is ensured through the inner fishing hook 10 and the outer fishing hook 9. Meanwhile, after the revolving body 3 rises, the lower sleeve 4 releases the limit of the stop pin 5, and the stop pin 5 is popped up under the action of the pressure spring and supported by the upper end face of the lower sleeve 4, so that the revolving body 3 is suspended on the lower sleeve 4, as shown in fig. 2. Then the fishing tool string 13 is lifted up once to fish the fishing spear together with the steel wire out of the pipeline, and the fishing operation in the continuous pipeline is completed.

If meet the card when lifting, then can shake disconnected backing pin 5 when the pulling force reaches the set for pulling force value, backing pin 5 is broken by the snap-off back, the solid of revolution 3 loses the support, under the resistance effect of solid of revolution 3 self gravity and steel wire, the solid of revolution 3 moves down, and reverse rotation under screw mechanism's effect, the solid of revolution 3 is at reverse rotation and downstream's in-process, the steel wire that the winding was on fishing spear 11 is fishing spear 11 downstream along with the center and is relieved the winding of fishing spear 11 at the center, avoid causing the secondary operation accident, be convenient for implement to salvage once more.

If backing pin 5 cuts off the back, the winding of steel wire on fishhook 10 and outer fishhook 9 is tighter including the winding, the solid of revolution 3 can not reverse gyration under the resistance effect of self gravity and steel wire, make the steel wire can not remove the winding, then need increase fishing tool cluster 13's pulling force once, take place elastic deformation by the extrusion when rubber ring 14 reaches the settlement pressure, make fishing spear and fishing tool cluster break away from once, and then make fishing tool cluster 13 can go up to propose outside the well, avoid causing the secondary operation accident. After the primary fishing tool string 13 is put forward, the fishing head 1 is exposed, the fishing spear is secondarily fished through the secondary fishing tool string with the universal joint, and the lower part of the secondary fishing tool string is hooked on the head of the fishing head 1 through the universal joint so as to realize secondary fishing. Of course, in other embodiments, the head of the fishing head may be hooked by other joints.

In other embodiments, the elastic element is a tension spring arranged in a long hole of the revolving body, one end of the tension spring is fixed on the revolving body, the other end of the tension spring is fixed on the stop pin, and when the stop pin is compressed into the long hole, the tension spring gives the stop pin an elastic acting force of the revolving body which extends outwards so as to realize outward springing and inward contraction of the stop pin along the radial direction of the revolving body; or an arc-shaped long groove is formed in the circumferential direction of the revolving body, an articulated shaft arranged along the axial direction of the revolving body is installed in the arc-shaped long groove, the supporting piece is an arc-shaped rod piece arranged in the arc-shaped long groove, one end of the arc-shaped rod piece is articulated on the articulated shaft, a torsional spring driving the arc-shaped rod piece to swing outwards is sleeved on the articulated shaft, and the arc-shaped rod piece is assembled on the revolving body in a swinging mode so as to realize the reciprocating movable assembly of the arc-shaped rod. It should be noted that the arc-shaped rod piece can overcome the elastic force of the torsion spring and enter the arc-shaped long groove without influencing the rotary lifting of the revolving body.

In other embodiments, the spiral guide groove may be provided on the revolution surface of the revolution body, and an outer continuous spiral structure or an outer fitting structure that fits the spiral guide groove is provided on the inside of the lower sleeve, wherein the outer continuous spiral structure is a continuous spiral protrusion, and the outer fitting structure is a plurality of protrusions arranged spirally; in other embodiments, the inner wall of the lower sleeve is provided with a spiral guide groove, and the rotating surface of the rotating body is provided with an external matching structure which is a plurality of protrusions arranged spirally.

In other embodiments, one end of the stop pin, which is far away from the pressure spring, can be arranged into a circular truncated cone structure; or the diameter of the hemispherical head of the stop pin may be less than or equal to the width of the helical guide groove.

In other embodiments, the stop pin may not be a frangible member, which requires the shear pin between the fishing tool string and the upper sleeve to be broken to lift the fishing tool string when the fishing encounters a jam.

In other embodiments, the circumferential guide surface may not be provided, and in this case, the wire does not easily enter below the rotator.

In other embodiments, the guide structure has an inclined guide surface to guide the wire to push against the body of revolution.

In other embodiments, can not set up outer fishing spear at fender platform lower extreme, only rely on central fishing spear to rotate in order to realize the steel wire fishing with the steel wire winding. Certainly, for improving the winding effect, also can drag for a peripheral suit outer barrel of lance at the center, utilize the space restriction of outer barrel to improve the winding effect that the lance was dragged for at the center.

In other embodiments, an annular groove may be formed in the inner wall of the lower sleeve, and after the rotator rotates and rises, the stop pin is ejected at the position of the annular groove and clamped into the annular groove to lock the rotator on the lower sleeve.

The utility model discloses a fishing device's embodiment 2, as shown in fig. 5, lie in with embodiment 1's difference, be equipped with the shear pin hole on fishing tool cluster 13's the fishing sleeve once, the neck of fishing head 1 is equipped with along its radial extension's shear pin perforation, should cut through the hole with the shear pin and correspond to link up with wearing shear pin 16 to with the cooperation of rubber circle 14, further improve fishing spear and fishing tool cluster 13's fishing muffjoint's stability once. Of course, in other embodiments, the number of shear pins may be more than one as desired.

The utility model discloses a concrete embodiment of fishing spear, fishing spear in this embodiment and

concrete embodiment

1 or 2 of above-mentioned fishing device the structure of fishing spear in the same, no longer describe here.

Claims

1. The trip spear, its characterized in that includes:

a salvaging body which is provided with a salvaging spear and is used for salvaging the steel wire;

the fishing head is fixedly arranged on the fishing body and comprises a head part and a neck part;

the neck is provided with an outer wall groove and is used for installing a rubber piece corresponding to an inner wall groove on a fishing sleeve of the primary fishing tool string, so that the primary fishing tool string is connected with the fishing spear, and the fishing spear is separated from the primary fishing tool string due to elastic deformation of the rubber piece caused by extrusion when the set pressure is reached;

the head is used for being matched with a connector hook of the secondary fishing tool string to realize that the secondary fishing tool string is connected with the fishing spear.

2. The fishing spear of claim 1 wherein the outer wall groove is an outer wall annular groove disposed circumferentially of the fishing head and the corresponding inner wall groove is an inner wall annular groove disposed circumferentially of the fishing sleeve, and the rubber member is a rubber ring.

3. The fishing spear of claim 2 wherein the outer wall annular grooves are provided in at least two in the axial direction of the fishing head.

4. The fishing spear of claim 1, 2 or 3 wherein the neck is further provided with shear pin through holes extending radially therethrough for corresponding through-threading of shear pins with corresponding shear pin holes in a fishing sleeve of a primary fishing tool string to thereby effect connection of the primary fishing tool string to the fishing spear.

5. The fishing spear of claim 1 or 2 or 3 wherein the fishing body comprises:

the fishing head is fixedly arranged on the supporting sleeve;

the rotary body is assembled in the supporting sleeve, a spiral mechanism for driving the rotary body to rotate in the supporting sleeve when the rotary body is axially jacked is arranged between the rotary body and the supporting sleeve, and the supporting sleeve is provided with a blocking platform for supporting and matching with the rotary body so as to prevent the support body from falling off downwards;

the supporting piece can be popped outwards and retracted inwards and is movably assembled on the revolving body in a reciprocating way, and the support piece popped outwards is used for being supported on the supporting sleeve;

the elastic element is arranged on the revolving body and applies elastic acting force for forcing the supporting element to be outwards popped;

the fishing spear is fixedly connected to the revolving body so as to be driven by the revolving body to rotate, so that the fished steel wire is wound on the fishing spear;

when the revolving body is assembled with the supporting sleeve, the supporting piece is retracted inwards to enable the revolving body to be assembled in the supporting sleeve in a reverse revolving mode, and when the revolving body rotates forwards for a set angle to move upwards to a set position, the supporting piece is driven to pop out by the elastic piece.

6. The fishing spear of claim 5 wherein the support is an outwardly sprung inwardly retracting catch pin in the radial direction of the swivel.

7. The fishing spear of claim 5, wherein the fishing spear is a central fishing spear, the lower end of the supporting sleeve is fixedly provided with outer fishing spears uniformly distributed around the central fishing spear, and the outer fishing spears are provided with outer fishing hooks extending obliquely upwards towards the inner side of the central fishing spear.

8. The fishing spear of claim 5 wherein the support sleeve comprises an upper sleeve and a lower sleeve detachably connected to the upper sleeve, the fishing head being disposed on the upper sleeve, the swivel fitting within the lower sleeve.

9. The fishing spear of claim 8 wherein the screw mechanism is adapted such that when the rotator is rotated by a set angle, the support member is exposed from the lower sleeve and springs outwardly under the resilient force of the resilient member to bear on the upper end surface of the lower sleeve.

10. Fishing device, including fishing spear and primary fishing tool cluster, its characterized in that, primary fishing tool cluster includes the fishing sleeve, is equipped with the inner wall recess on the fishing sleeve, the fishing spear is the fishing spear of any one of claims 1-9.