CN215213402U

CN215213402U - Slider fishing spear with reciprocating fish exiting and fishing functions

Info

Publication number: CN215213402U
Application number: CN202121356558.5U
Authority: CN
Inventors: 李智; 张天桐; 周恒仓; 王磊
Original assignee: Mudanjiang Linhai Petroleum Fishing Tool Co ltd
Current assignee: Mudanjiang Linhai Petroleum Fishing Tool Co ltd
Priority date: 2021-06-19
Filing date: 2021-06-19
Publication date: 2021-12-17
Anticipated expiration: 2031-06-19

Abstract

A sliding block fishing spear with the functions of reciprocating withdrawal and salvage of fallen fishes comprises an upper joint, a spear rod, a hoop sleeve, a pull rod, a limiting barrel, a friction block and a slip, wherein the upper joint is connected with the spear rod and the hoop sleeve, the limiting barrel is sleeved at the upper end of the spear rod, a pull rod embedding groove for embedding the pull rod and a dovetail rail for connecting the slip are formed in the side wall of the spear rod embedding groove, a guide groove is formed in the outer side surface of the limiting barrel, the friction block is arranged at the lower end of the pull rod, the slip is fixedly connected with the lower end head of the pull rod, the sliding block fishing spear adopts a matching structure of the pull rod and the limiting barrel, the pull rod is limited and positioned by utilizing long vertical grooves and short vertical grooves on the limiting barrel alternately, the conversion between a salvage state and a withdrawal state is realized, the withdrawal and salvage functions of the fallen fishes can be controlled in a reciprocating manner under the condition without lifting a drilling tool, and the cyclic operation of salvage, release and refloatation can be realized in the actual production, the fishing efficiency and the fishing effect are improved, and the fishing cost is reduced.

Description

Slider fishing spear with reciprocating fish exiting and fishing functions

Technical Field

The utility model relates to a slider drags for lance, in particular to slider drags for lance with reciprocal withdraw from of fish and salvage function.

Background

The sliding block fishing spear is an internal fishing tool which is common in oilfield production and application, can be used for fishing underground falling fishes with inner holes, such as drill pipes, oil pipes, milling pipes, liner pipes, packers, water distributors, production distributors and the like, and can also be used for carrying out back-off operation or being matched with other tools when meeting the falling fishes to process the falling fishes and the blocking faults. The utility model discloses a patent number 202020604752's utility model discloses a "can move back formula double block drags for lance", adopts the mode of cutting shear pin release piece, controls two elastic lance pole body contractions that open that have, relies on the reduction of lance combination pole footpath to make two slider slips that set up respectively on the lance lose the tight function of the card of holding that rises to the fish, reaches the purpose of withdrawing from the fish. Although this technical scheme has the fish and withdraws from the function to can in time release the fish when salvaging and meet the card, nevertheless, still there is the functional limitation great in actual production, and it is lower to salvage efficiency, and the higher problem of running cost mainly embodies in following two aspects: on one hand, the control mode of cutting off the connecting shear pin has higher requirement on the stability of fishing operation, and the instant impact action in actual production is easy to cause accidental cutting off of the shear pin, so that fishing accidents are caused, and fishing failure is caused; on the other hand, after the shear pin is cut off and the fish is dropped, the shear pin must be pulled out to replace the fishing tool for fishing again, so that the labor intensity of workers is increased, and the waste of production resources is also caused, therefore, the structural function of the sliding block fishing spear in the prior art is improved and perfected, the fishing efficiency is improved, and the fishing cost is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a spear is dragged for to slider with the reciprocal withdraw from of fish and salvage function realizes the reciprocal operation function of fish release and salvage among the fish salvage process of fish that falls in the pit.

A slider fishing spear with reciprocating fish exiting and fishing functions comprises: top connection, spear, ferrule, pull rod, spacing section of thick bamboo, clutch blocks and slips.

The upper end of the upper joint is provided with a threaded connection structure connected with a drill rod of a drilling tool, the lower end of the upper joint is simultaneously connected with the spear and the ferrule, and the side wall of the upper joint is provided with a liquid flow hole penetrating through the interior and the exterior; the spear is a rod-shaped body, the upper end of the spear is provided with a reducing shoulder, the lower end of the spear is provided with a conical end, the side wall of the spear is provided with a pull rod embedding groove along the axial direction, and the lower end of the pull rod embedding groove extends to form a dovetail rail inclined outwards and downwards; the limiting cylinder is sleeved at the upper end of the lance rod through the reducing shoulder support, a guide groove of a concave structure is formed in the outer side surface of the limiting cylinder, the guide groove is composed of a long vertical groove, a short vertical groove and a transition groove, the long vertical groove and the short vertical groove are vertically arranged at intervals along the outer circumference of the limiting cylinder, the transition groove is respectively communicated with the adjacent long vertical groove and the short vertical groove, the top ends of the long vertical groove and the short vertical groove are respectively provided with a first side guide surface in an inclined state, and the bottom of the transition groove is respectively provided with a second side guide surface in an inclined state; the pull rod body is embedded in the pull rod embedding groove, the upper end of the pull rod body is superposed on the outer circumferential surface of the limiting cylinder, a guide pin which is structurally matched with the guide groove is arranged on the inner side of the pull rod body and is embedded in the guide groove, the outer side of the pull rod body is radially limited by the hoop sleeve, the lower end of the pull rod is provided with the friction block, and the outer side surface of the friction block protrudes out of the outer circumferential surface of the lance; the outer side of the slip is a tooth surface, the inner side of the slip is provided with a dovetail groove correspondingly matched with the dovetail rail and matched and connected with the dovetail rail, and the upper end of the slip is fixedly connected with the end head of the lower end of the pull rod.

Further, it is preferable that a spring is installed between the friction block and the pull rod to improve the safety and reliability of the operation of the friction block.

Preferably, 2 pull rod embedding grooves are formed in the side wall of the lance, the pull rod embedding grooves are arranged in a staggered mode in the axial direction, namely long pull rod embedding grooves and short pull rod embedding grooves with lower end ends staggered by a distance L, the pull rods with lengths matched with the lengths of the long pull rod embedding grooves are correspondingly embedded in the long pull rod embedding grooves, the short pull rods are embedded in the short pull rod embedding grooves, the dovetail rails are correspondingly and respectively arranged at the lower ends of the long pull rod embedding grooves and the short pull rod embedding grooves in an extending mode, and the slips are installed in a matched mode.

Still further, preferably, 1 friction block is additionally arranged at the same circumferential position on the long pull rod and the lower end of the short pull rod.

Further, it is preferable that a lock piece is mounted on the lance at a lower end tip of the dovetail rail.

The beneficial effects of the utility model are that, a slider drag for lance with function is withdrawed from and salvages to fish reciprocating to the fish that falls is provided, adopts pull rod and a spacing cooperation structure of section of thick bamboo, utilizes long perpendicular recess and short perpendicular recess to restrict the location to the pull rod in turn on the spacing section of thick bamboo, regulates and control the function of salvaging of snatching of slips, can realize not promoting the tubular column to salvage, release and the reciprocal cycle operation of salvaging again of falling fish in the pit at the salvage in-process, improves salvage efficiency, reduces and salvages the cost.

Drawings

Fig. 1 is a front view of a fishing state of a sliding block fishing spear with the function of reciprocating withdrawal and fishing of fish.

Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.

Fig. 3 is a front view showing the withdrawal state of the sliding block fishing spear with the function of reciprocating and fishing the fallen fish.

Fig. 4 is a side view showing the withdrawing state of the sliding block fishing spear having the reciprocating withdrawing and fishing functions of the fallen fish.

Fig. 5 is a schematic structural view of the limiting cylinder.

Detailed Description

The claimed technical solution of the present invention is further described below with reference to the following specific embodiments and the accompanying drawings.

A sliding block fishing spear with a function of reciprocating and withdrawing and fishing a fallen fish, as shown in fig. 1 to 5, comprising: the upper joint 1, the lance 2, the hoop 3, the pull rod 4, the limiting barrel 5, the friction block 6, the slips 7 and the locking block 8.

The upper end of the upper joint 1 is provided with an internal thread, the lower end of the upper joint is provided with an internal thread and an external thread at the same time and is respectively in threaded connection with the lance and the ferrule, the side wall is symmetrically provided with liquid flow holes 10, the radial symmetric position of the side wall of the lance 2 is correspondingly provided with 2 pull rod embedding grooves along the axial direction, the lower end heads of the 2 pull rod embedding grooves are staggered by a distance L, the lower end of each pull rod embedding groove is respectively extended and provided with a dovetail rail 11 inclined outwards and downwards, the lower end heads of the dovetail rails 11 are respectively provided with the locking block 8, the limiting cylinder 5 is sleeved on the lance 2, the outer side surface is provided with a guide groove of a concave structure, the guide groove is composed of a long vertical groove 12, a short vertical groove 13 and a transition groove 14, the long vertical groove 12 and the short vertical groove 13 are vertically arranged along the outer circumference of the limiting cylinder 5 at intervals, the long vertical grooves 12 and the short vertical grooves 13 are respectively kept radially symmetrical, the transition grooves 14 are respectively communicated with the adjacent long vertical grooves 12 and the adjacent short vertical grooves 14, the top ends of the long vertical grooves 12 and the short vertical grooves 13 are respectively provided with a first side guide surface 15, the bottom of the transition grooves 14 are respectively provided with a second side guide surface 16, the rod bodies of the pull rods 4 with matched lengths are respectively and correspondingly embedded in 2 pull rod embedding grooves, the upper ends of the pull rods are respectively superposed on the limiting cylinder 5, guide pins 9 arranged on the inner sides are respectively embedded in the guide grooves, the outer sides of the slip are radially limited by the hoop sleeves 2, the outer sides of the slip are tooth surfaces, the inner sides of the slip are provided with dovetail grooves and are matched and connected with the dovetail tracks 11, the upper ends of the slip rods are fixedly connected with the pull rods 4, the lower ends of the pull rods 4 are respectively provided with the friction blocks 6, meanwhile, 1 friction block 6 is additionally arranged at the same circumferential symmetrical position of the friction block 6 arranged on the long pull rod with long length and the lower end of the short pull rod with short length, the outer side surface of each friction block 6 protrudes out of the outer circumferential surface of the lance 2, and a spring is arranged between each friction block 6 and the pull rod 2.

When the sliding block fishing spear with the functions of reciprocating withdrawing and fishing of the fallen fish is in a fishing state, as shown in fig. 1 and fig. 2, the guide pins 9 on the two pull rods 4 are respectively embedded in the long vertical grooves 12 which are symmetrical to the radial two sides of the pull rod 5, the slips 7 connected to the lower ends of the pull rods 4 are positioned at the lower parts of the dovetail tracks 11 on the spear rods 2, at this time, because the tooth surfaces of the slips 7 are far away from the center of the spear rods 2, the tooth surfaces of the slips 7 are protruded out of the outer circumferential surface of the spear rods 2, and meanwhile, free spaces which move up and down are also arranged in the length range of the long vertical grooves 12, when the fallen fish is fished underground, along with the descending of the drill rods, the spear rods 2 extend into the inner hole of the fallen fish in the underground, and continue to descend, the fallen fish sequentially acts on the 2 slips 7, namely: the slips 7 are pushed to move upwards along the spear 2, so that the distance between tooth surfaces of the slips 7 and the center of the spear 2 is gradually reduced, when the distance between the tooth surfaces and the center of the spear 2 is reduced to be smaller than the equivalent radius of an inner hole of a fish falling in a well, the slips 7 also enter the inner hole of the fish falling in the well, after the two slips 7 respectively enter the inner hole of the fish falling in the well, a drill stem of a drilling tool is lifted, the fish falling in the well can be driven to move downwards relative to the spear by friction under the action of self gravity, so that the tooth surfaces of the slips 7 are engaged on the side wall of the inner hole of the fish falling in the well, the fish falling in the well is held in an expanding manner, and the fish falling in the well is lifted and extracted by a drilling tool while drilling.

In the fishing operation process, when a blockage cannot salvage and lift the output well and a falling fish needs to exit the well, the drill pipe is reversely sent downwards, the falling fish in the well is placed back, the drill pipe is continuously sent downwards after the falling fish in the well falls stably, the falling fish in the well acts on the tooth surfaces of the slips 7 to push 2 pull rods 4 to move upwards in a linkage mode relative to the spear rod 2, after the center distance between the tooth surfaces of the slips 7 and the spear rod 2 is reduced to be smaller than the equivalent radius of an inner hole of the falling fish in the well, the falling fish in the well can be rotated to act on each friction block 6 arranged on 2 pull rods 4 to continuously push the spear rod 2 to move upwards, when the guide pin 9 arranged on the pull rod 4 moves upwards to the top end of the long vertical groove 12 and acts on the first side guide surface 15, the limiting cylinder 5 can be pushed to rotate until the guide pin 9 reaches the top end of the first side guide surface 15, stopping sending and lifting the drill pipe, and under the gravity of the slips 7 and the friction between the falling fish and the tooth surfaces of the

slips

1, 2 pull rods 4 are linked to descend relative to the lance 2, the guide pin 9 descends along the transition groove 14, and acts on the second side guide surface 16 at the lower part to rotate the limiting cylinder 5 again until the guide pin 9 falls into the bottom end of the short vertical groove 13, at this time, as shown in fig. 3 and 4, 2 slips 7 are locked at the upper part of the dovetail rail 11, and the falling fish is released back to the oil well without having the function of catching and fishing the falling fish because the distance between the tooth surfaces and the lance 2 is smaller than the circumferential radius of the lance 2 and the free space moving up and down along the axial direction is lost.

When the underground fish needs to be salvaged again, the drill rod of the drill tool can be directly sent down again without lifting the drill rod to the ground, the lance 2 is sent into the returned underground inner hole, the inner wall of the underground fish acts on the friction block 6 to push 2 pull rods 4 to move upwards relative to the lance 2, similarly, the guide pin 9 acts on the first side guide surface 15 and the second side guide surface 16 respectively to push the limiting cylinder 5 to rotate and is guided into the long vertical groove 12 from the short vertical groove 13, so that the slip 7 is unlocked, the slip block fishing spear with the reciprocating withdrawing and fishing functions of the fish is switched to a fishing state again, and at the moment, the drill rod is lifted to directly salvage the underground fish again.

Above-mentioned operation is implemented in the circulation, can realize a slider drags for lance with reciprocal withdraw from and salvage function of fish changes between salvage state and withdraw from the state, can not promote under the circumstances of drilling tool drilling rod in actual production, carries out the reciprocal regulation and control of withdrawing from and salvage function to the fish that falls in the pit, improves salvage effect and salvage efficiency.

Claims

1. The utility model provides a slider drag for lance with reciprocal withdraw from of fish and salvage function which characterized in that includes: the device comprises an upper joint (1), a lance (2), a hoop sleeve (3), a pull rod (4), a limiting cylinder (5), a friction block (6) and a slip (7);

the upper end of the upper connector (1) is provided with a threaded connection structure, the lower end of the upper connector is connected with the lance (2) and the hoop (3), and the side wall of the upper connector is provided with a liquid flow hole (10) penetrating through the inside and the outside; the spear (2) is a rod-shaped body, the upper end of the spear is provided with a reducing shoulder, the lower end of the spear is provided with a conical end, the side wall of the spear is provided with a pull rod embedding groove along the axial direction, and the lower end of the pull rod embedding groove extends to form a dovetail rail (11) which inclines outwards and downwards; the limiting cylinder (5) is arranged at the upper end of the lance rod (2) through the reducing shoulder support sleeve, a guide groove of a concave structure is formed in the outer side surface of the limiting cylinder (5), the guide groove is composed of long vertical grooves (12), short vertical grooves (13) and transition grooves (14), wherein the long vertical grooves (12) and the short vertical grooves (13) are vertically arranged at intervals along the outer circumference of the limiting cylinder (5), the transition grooves (14) are respectively communicated with the adjacent long vertical grooves (12) and short vertical grooves (13), the top ends of the long vertical grooves (12) and the short vertical grooves (13) are respectively provided with a first side guide surface (15) in an inclined state, and the bottom of the transition grooves (14) are respectively provided with a second side guide surface (16) in an inclined state; the pull rod (4) body is embedded in the pull rod embedding groove, the upper end of the pull rod (4) body is overlapped on the outer circumferential surface of the limiting cylinder (5), a guide pin (9) which is matched with the guide groove forming structure is installed on the inner side of the pull rod and is embedded in the guide groove, the outer side of the pull rod is limited by the hoop sleeve (3) in the radial direction, the lower end of the pull rod (4) is provided with the friction block (6), and the outer side surface of the friction block (6) protrudes out of the outer circumferential surface of the lance (2); the outside of slips (7) is the tooth flank, the inboard seted up with dovetail track (11) correspond complex dovetail and with dovetail track (11) cooperation is connected, the upper end with pull rod (4) lower extreme end fixed connection.

2. The slider fishing spear with the function of reciprocating withdrawing and fishing of the fallen fish as claimed in claim 1, is characterized in that: a spring (17) is arranged between the friction block (6) and the pull rod (4).

3. The slider fishing spear with the function of reciprocating withdrawing and fishing of the fallen fish as claimed in claim 1 or 2, is characterized in that: the side wall of the lance rod (2) is provided with 2 pull rod embedding grooves, the pull rod embedding grooves are arranged in a staggered manner in the axial direction, namely long pull rod embedding grooves and short pull rod embedding grooves with lower end ends staggered by a distance L, and the pull rods (4) with lengths matched with the long pull rod embedding grooves are correspondingly embedded in the long pull rod embedding grooves respectively, namely long pull rods are embedded in the short pull rod embedding grooves, short pull rods are embedded in the short pull rod embedding grooves, the lower ends of the long pull rod embedding grooves and the short pull rod embedding grooves are correspondingly extended to form dovetail rails (11) respectively, and the slips (7) are installed in a matched manner.

4. The slider fishing spear with the function of reciprocating withdrawing and fishing of the fallen fish as claimed in claim 3, is characterized in that: and 1 friction block (6) is additionally arranged at the same circumferential position of the friction block (6) arranged and arranged on the lower end of the short pull rod on the long pull rod.

5. The slider fishing spear with the function of reciprocating withdrawing and fishing of the fallen fish as claimed in claim 4, is characterized in that: a locking block (8) is arranged at the lower end head of the dovetail rail (11) on the lance (2).