阅读说明：本技术 接箍定位锚定装置 (Coupling positioning anchoring device ) 是由 梁伟成 梁闯 于 2021-02-07 设计创作，主要内容包括：本发明涉及接箍定位锚定装置,包括上接头,打捞接头,外套,下中心管,固定活塞,拨叉,卡瓦片,主体,下工作筒,下接头；所述上接头套装有活塞Ⅰ,所述打捞接头和下中心管之间设有锁块；所述打捞接头和固定活塞设有解封环,所述解封环套装下中心管,所述解封环前部置于打捞接头末端和下中心管之间并设有钢球Ⅰ,所述拨叉包括拨叉Ⅰ和拨叉Ⅱ,所述主体中部内壁套装下中心管,所述卡瓦片通过销轴连接于主体；所述卡瓦片靠近下中心管内壁设有多个凹槽,靠近销轴处设有端部凸起；本装置锚定在套管接箍缝内定位准确,卡瓦片上没有坚硬的齿牙不会对套管内壁造成损伤,提高打捞成功率。(The invention relates to a coupling positioning and anchoring device, which comprises an upper joint, a fishing joint, an outer sleeve, a lower central pipe, a fixed piston, a shifting fork, a slip sheet, a main body, a lower working cylinder and a lower joint, wherein the upper joint is fixedly connected with the lower central pipe; the upper joint is sleeved with a piston I, and a locking block is arranged between the fishing joint and the lower central pipe; the fishing joint and the fixed piston are provided with deblocking rings, the deblocking rings are sleeved on a lower central pipe, the front parts of the deblocking rings are arranged between the tail end of the fishing joint and the lower central pipe and are provided with steel balls I, each shifting fork comprises a shifting fork I and a shifting fork II, the lower central pipe is sleeved on the inner wall of the middle part of the main body, and the clamping tiles are connected to the main body through pin shafts; the slip sheet is provided with a plurality of grooves close to the inner wall of the lower central tube, and end parts of the slip sheet close to the pin shaft are provided with bulges; the anchoring device is accurately positioned in a casing coupling seam in an anchoring mode, no hard teeth are arranged on the slip sheets, the inner wall of the casing cannot be damaged, and the fishing success rate is improved.)

1. The coupling positioning and anchoring device comprises an upper joint, a fishing joint, an outer sleeve, a lower central pipe, a fixed piston, a shifting fork, a slip sheet, a main body, a lower working cylinder and a lower joint; a spring is arranged between the lower working barrel and the lower central tube, and the external thread at the front end of the lower joint is connected with the lower end of the lower working barrel; the method is characterized in that:

the upper joint is sleeved with a piston I, and the piston I is fixedly connected with the upper joint through a pin I; the salvaging connector is sleeved at the lower part of the upper connector, and the claw-shaped protrusion of the upper connector is arranged between the salvaging connector and the piston I; the lower part of the salvaging connector is sleeved with a lower central pipe and is fixedly connected with the lower central pipe through a pin II; a locking block is arranged between the salvaging connector and the lower central pipe; the fixed piston is arranged below the fishing joint, the fishing joint and the fixed piston are provided with deblocking rings, the deblocking rings are sleeved on the lower central pipe, the front part of the deblocking ring is arranged between the tail end of the fishing joint and the lower central pipe and is provided with a steel ball I, and the steel ball I is embedded between the deblocking rings and the lower central pipe;

the fixed piston is in threaded connection with the lower central tube, a clamp spring is arranged at the front part of the fixed piston, and triangular helical teeth I are arranged on the clamp spring; the shifting fork comprises a shifting fork I and a shifting fork II, the shifting fork I is arranged below the fixed piston, is sleeved with the lower central tube and is fixedly connected with the pin III; the shifting fork I and the shifting fork II are fixedly connected through a connecting rod; the outer sleeve is sleeved on the lower part of the fishing joint, the unsealing ring and the fixed piston and is connected with the front part of the shifting fork I, the inner side of the outer sleeve is provided with an annular groove and triangular helical teeth II, and the triangular helical teeth II can be meshed with the triangular helical teeth I; the lower central tube is sleeved on the inner wall of the middle part of the main body, the shifting fork I is sleeved at the front end of the main body, and the lower end of the main body is connected with the front end of the lower working barrel; the clamping tile is connected to the main body through a pin shaft; the shifting fork II is arranged in the working barrel and sleeved with the lower central pipe, the upper end of the spring supports the lower end face of the shifting fork II, and the lower end of the spring supports the lower joint; the slip sheet is provided with a plurality of heads I at the front end, the slip sheet is provided with a plurality of grooves close to the inner wall of the lower central tube, the end part of the slip sheet is convex close to the pin shaft, the shift fork is provided with a plurality of front end heads II, the top ends of the front end heads II of the shift fork are trapezoidal blocks and are provided with inclined planes, the top ends of the front end heads II are arranged between the convex end parts of the slip sheet and the lower central tube, and the inclined planes of the front end heads II are in contact with the inner side cambered surface of the convex end parts of the slip sheet.

2. The collar locating and anchoring device of claim 1, wherein: the front end of the shifting fork I is provided with two heads I, and the top end of each head I is provided with a conical inclined plane; the shifting fork II is provided with two front end heads II; the two clamping tiles are arranged end to end, and two rhombic grooves are formed in the inner wall close to the lower central tube; when the shifting fork I goes down, the top end of the head part I at the front end is inserted into the rhombic groove in the clamping tile.

3. The collar locating and anchoring device of claim 1, wherein: the inner wall of the piston I is provided with a chamfer inclined plane, after the clamping process is finished, a steel ball II is thrown into the oil pipe from the ground, and the steel ball II falls to the chamfer inclined plane at the upper end of the piston I to form line sealing with the piston I.

Technical Field

The invention relates to the field of oil well equipment, in particular to a coupling positioning and anchoring device.

Background

At present, in the anchoring part of a tubing anchor or a releasing packer and other tools used on an oil pumping well, most of slips are displaced by utilizing hydraulic pressure or downward pressure, and one-way teeth on the slips are embedded in the inner wall of a sleeve to realize anchoring. The hardness of the teeth on the slips is higher than that of the inner wall of the casing, so that tooth marks are easily left on the inner wall of the casing in the working process, the casing is easily damaged, the production of an oil well is influenced, the service life of the oil well is shortened, the yield of the oil well is reduced, and great economic loss is generated.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention aims to provide a coupling positioning and anchoring device which is accurately positioned in a coupling seam of a casing pipe in an anchoring mode, and the inner wall of the casing pipe cannot be damaged due to the fact that no hard tooth is arranged on a slip sheet, so that the fishing success rate is improved.

The invention aims to realize the technical scheme that the coupling positioning and anchoring device comprises an upper joint, a fishing joint, an outer sleeve, a lower central pipe, a fixed piston, a shifting fork, a slip sheet, a main body, a lower working barrel and a lower joint; a spring is arranged between the lower working barrel and the lower central tube, and the external thread at the front end of the lower joint is connected with the lower end of the lower working barrel; the technical key points are as follows:

the upper joint is sleeved with a piston I, and the piston I is fixedly connected with the upper joint through a pin I; the salvaging connector is sleeved at the lower part of the upper connector, and the claw-shaped protrusion of the upper connector is arranged between the salvaging connector and the piston I; the lower part of the salvaging connector is sleeved with a lower central pipe and is fixedly connected with the lower central pipe through a pin II; a locking block is arranged between the salvaging connector and the lower central pipe; the fixed piston is arranged below the fishing joint, the fishing joint and the fixed piston are provided with deblocking rings, the deblocking rings are sleeved on the lower central pipe, the front part of the deblocking ring is arranged between the tail end of the fishing joint and the lower central pipe and is provided with a steel ball I, and the steel ball I is embedded between the deblocking rings and the lower central pipe;

the fixed piston is in threaded connection with the lower central tube, a clamp spring is arranged at the front part of the fixed piston, and triangular helical teeth I are arranged on the clamp spring; the shifting fork comprises a shifting fork I and a shifting fork II, the shifting fork I is arranged below the fixed piston, is sleeved with the lower central tube and is fixedly connected with the pin III; the shifting fork I and the shifting fork II are fixedly connected through a connecting rod; the outer sleeve is sleeved on the lower part of the fishing joint, the unsealing ring and the fixed piston and is connected with the front part of the shifting fork I, the inner side of the outer sleeve is provided with an annular groove and triangular helical teeth II, and the triangular helical teeth II can be meshed with the triangular helical teeth I; the lower central tube is sleeved on the inner wall of the middle part of the main body, the shifting fork I is sleeved at the front end of the main body, and the lower end of the main body is connected with the front end of the lower working barrel; the clamping tile is connected to the main body through a pin shaft; the shifting fork II is arranged in the working barrel and sleeved with the lower central pipe, the upper end of the spring supports the lower end face of the shifting fork II, and the lower end of the spring supports the lower joint; the slip piece is close to the inner wall of the lower central tube and is provided with a groove, a part bulge is arranged at a position close to the pin shaft, the top end of the head part II of the front end of the shifting fork is arranged between the bulge of the end part of the slip piece and the lower central tube, the head part II of the front end of the shifting fork is in a trapezoidal block shape and is provided with an inclined plane, and the inclined plane of the head part of the front end is in contact with the inner side cambered surface of the.

Furthermore, two heads I are arranged at the front end of the shifting fork I, and conical inclined planes are arranged at the top ends of the heads I; the shifting fork II is provided with two front end heads II; the card tile is two, and end to end arranges, and the inner wall that is close to lower center tube is equipped with two rhombus recesses.

Furthermore, the inner wall of the piston I is provided with a chamfer inclined plane, after the coupling positioning and anchoring device is subjected to the clamping process, a steel ball II is thrown into the oil pipe from the ground, and the steel ball II falls to the chamfer inclined plane at the upper end of the piston I to form linear sealing with the piston I.

Drawings

FIG. 1 is a schematic diagram of the construction of the collar locating and anchoring device;

FIG. 2 is a schematic view showing the connection of the internal structures of the casing of the device;

FIG. 3 is a schematic view showing the connection of the main body and other structures of the apparatus;

FIG. 4 is a cross-sectional view of FIG. 1A-A;

FIG. 5 is a cross-sectional view of FIG. 1B-B;

FIG. 6 is a schematic structural view of a shifting fork I;

FIG. 7 is a schematic structural view of a shifting fork II;

FIG. 8 is a schematic view of a connection structure of a shifting fork I, a shifting fork II and a slip sheet;

FIG. 9 is a schematic view of the connection between the steel ball II and the piston I.

In fig. 1 to 9, specific names of the respective structures are: an upper joint 1, a claw-shaped protrusion 1-1, a pin I2, a piston I3, a fishing joint 4, an upper groove hole I4-1, an outer sleeve 5, an annular groove 5-1, a triangular helical tooth II 5-2, a locking block 6, a lower central tube 7, a lower groove hole I7-1, a lower groove hole II 7-2, a pin II 8, a deblocking ring 9, an upper groove hole II 9-1, a steel ball 10, a snap spring 11, a triangular helical tooth I11-1, a fixed piston 12, a snap spring groove 12-1, a pin III 13, a shift fork I14, a head I14-1, a slip sheet 15, a diamond-shaped groove 15-1, an end protrusion 15-2, a connecting rod 16, an inner hexagonal bolt I17, a pin shaft 18, a main body 19, an inner hexagonal bolt II 20, a shift fork II 21, a head II 21-1, a lower working cylinder 22, a spring 23 and a lower joint 24, steel ball II 25 and oil pipe 26.

Detailed Description

Referring to fig. 1 to 9, the specific structure of the present embodiment is: a coupling positioning and anchoring device comprises an upper joint 1, a fishing joint 4, an outer sleeve 5, a lower central pipe 7, a fixed piston 12, a shifting fork, a slip sheet 15, a main body 19, a lower working cylinder 22 and a lower joint 24;

the upper joint 1 is sleeved with a piston I3, and the piston I3 is fixedly connected with the upper joint 1 through a pin I2; the fishing joint 4 is sleeved at the lower part of the upper joint 1, and the claw-shaped protrusions 1-1 of the upper joint 1 are arranged between the fishing joint 4 and the piston I3;

the lower part of the salvaging connector 4 is sleeved with a lower central pipe 7 and is fixedly connected with the lower central pipe through a pin II 8; the fishing joint 4 and the lower central pipe 7 are respectively provided with an upper groove hole I4-1 and a lower groove hole I7-1 to form a lock hole groove I, a lock block 6 is arranged in the lock hole groove I, and the lock block 6 is embedded in the upper groove hole I4-1 and the lower groove hole I7-1 of the fishing joint 4 and the lower central pipe 7 and is clamped and locked;

the fixed piston 12 is arranged below the fishing joint 4, an unsealing ring 9 is arranged between the fishing joint 4 and the fixed piston 12, the unsealing ring 9 is sleeved with a lower central pipe 7, the front part of the unsealing ring 9 is arranged between the tail end of the fishing joint 4 and the lower central pipe 7, the front part of the unsealing ring 9 and the lower central pipe 7 are respectively provided with an upper groove hole II 9-1 and a lower groove hole II 7-2 to form a lock hole groove II, a steel ball 10 is arranged in the lock hole groove II, and the steel ball 10 is embedded in the upper groove hole II and the lower groove hole II of the unsealing ring 9 and the lower central pipe 7 and is clamped and locked; the rear part of the unsealing ring 9 is arranged between the fishing joint 4 and the fixed piston 12;

the fixed piston 12 is in threaded connection with the lower central tube 7, a clamp spring groove 12-1 is formed in the front of the fixed piston 12, a clamp spring 11 is arranged in the clamp spring groove, and triangular oblique teeth I11-1 are arranged on the clamp spring 11;

the shifting fork comprises a shifting fork I14 and a shifting fork II 21, wherein the shifting fork I14 is arranged below the fixed piston 12, sleeved with the lower central tube 7 and fixedly connected with the pin III 13;

the outer sleeve 5 is sleeved with the lower part of the fishing joint 4, an unsealing ring 9 and a fixed piston 12 and is in threaded connection with the front part of the shifting fork I14, an annular groove 5-1 and triangular helical teeth II 5-2 are arranged on the inner side of the outer sleeve 5, and the triangular helical teeth II 5-2 can be meshed with the triangular helical teeth I11-1;

the lower central tube 7 is sleeved on the inner wall of the middle part of the main body 19, the shifting fork I14 is sleeved at the front end of the main body 19 and is in sliding connection with the front end of the lower working barrel 22, and the lower end of the main body 19 is in threaded connection with the front end of the lower working barrel 22; the tile clamping piece 15 is connected to the main body 19 through two pin shafts 18, the pin shafts 18 are connected with the main body 19 through inner hexagonal bolts II 20, and the inner hexagonal bolts II 20 are in threaded connection with the main body 19;

the shifting fork II 21 is arranged in the working barrel 22 and sleeved with the lower central tube 7, a spring 23 is arranged between the lower working barrel 22 and the lower central tube 7, the spring 23 is sleeved with the lower central tube 7 of the main body, and the upper end of the spring 23 supports the lower end face of the shifting fork II 21 and the lower end supports the lower joint 24; the external thread at the front end of the lower joint 24 is connected with the lower end of the lower working barrel 22;

the shifting fork I14 and the shifting fork II 21 are fixedly connected through two connecting rods 16; the connecting rod 16 is in threaded connection with the shifting fork I14, and the other end of the connecting rod 16 is connected with the shifting fork II 21 through an inner hexagon bolt I17;

the two clamping pieces 15 are arranged end to end, the inner wall of each clamping piece 15, which is close to the lower central tube 7, is provided with a diamond-shaped groove 15-1, two end protrusions 15-2 are respectively arranged at positions close to the two pin shafts 18, and the inner sides of the end protrusions 15-2 are provided with arc surfaces H;

the front end of the shifting fork I14 is provided with two triangular pyramid-shaped heads I14-1, and the heads I14-1 are provided with conical inclined planes E; the shifting fork II 21 is provided with two front end heads II 21-1; the front end head part II 21-1 of the shifting fork II is in a trapezoid block shape and is provided with a trapezoid inclined surface D, and the trapezoid inclined surface D is arranged on the outer side; when the shifting fork I14 moves downwards, the top end of the front end head I14-1 is inserted into the groove 15-1 in the clamping tile; the top end of the front end head part II 21-1 of the shifting fork II 21 is arranged between the bulge 15-2 at the end part of the slip sheet 15 and the lower central tube 7, and the trapezoidal inclined plane D of the front end head part II 21-1 of the shifting fork II 21 is contacted with the cambered surface H of the bulge at the end part of the slip sheet 15;

the inner wall of the piston I3 is provided with a chamfer inclined plane J, after the coupling positioning and anchoring device is subjected to the clamping process, a steel ball II 25 is thrown into the oil pipe 26 from the ground, and the steel ball II 25 falls to the chamfer inclined plane J at the upper end of the piston I3 to form linear sealing with the chamfer inclined plane J.

The working principle of the device is as follows:

after the tool is connected with the oil pipe 26 or other tools, the tool is delivered to the depth above the joint of the cutting sleeve according to the construction requirement. The pin III 13 is sheared by pressurizing in the oil pipe 26, the shifting fork I14 descends together with the outer sleeve 5, and the clamping piece 15 is opened and attached to the inner wall of the sleeve by the conical inclined surface at the lower end of the shifting fork I14. The string is slowly lowered so that the slip segments 15 enter the casing joint. Meanwhile, as the outer sleeve 5 descends, the annular groove 5-1 of the outer sleeve 5 runs to the position above the locking block 6 to complete unlocking; meanwhile, triangular helical teeth II 5-2 in the outer sleeve 5 are meshed and buckled with triangular helical teeth I11-1 on the outer surface of the clamp spring 11, and the sitting and the clamping are completed.

After the clamping process is finished, a steel ball II 25 is thrown into the oil pipe from the ground, and the steel ball II 25 falls to a chamfer J at the upper end of the piston I3 to form line sealing with the piston I3. At the moment, the shear pin I2 is pressurized into the oil pipe, the piston 3 moves downwards, the upper unlocking joint 1 and the fishing joint 4 are limited, and the oil pipe is lifted to complete releasing.

And lifting the pipe column by using a fishing tool, shearing the pin II 8, unlocking the fishing joint 4 and the lower central pipe 7, and driving the outer sleeve 5 and the shifting fork I14 to go upwards by the upward movement of the fishing joint 4. Because the connecting rod 16 is connected between the shifting fork I14 and the shifting fork II 21, the shifting fork I14 moves upwards while the shifting fork II 21 moves upwards under the action of the spring 23, and the slip sheets 15 are withdrawn to finish fishing.

The device has the structural characteristics that:

(1) the tool is anchored in the casing joint and accurately positioned, and the slip sheets 15 without hard teeth can not damage the inner wall of the casing.

(2) The steel ball 10 is embedded in the unsealing ring 9, so that the reverse force for opening the clamping tile 15 does not directly act on the pin II 8 but acts on the spigot surface C at the lower end of the fishing joint 4.

(3) A conical inclined plane E on the shifting fork I14 moves downwards to open the clamping tile 15 so as to anchor the clamping tile in a casing coupling seam; when the well is lowered, the upper end inclined plane D of the shifting fork II 21 limits the cambered surface H of the slip sheet 15 not to rotate along the pin shaft 18, and therefore the slip sheet 15 is guaranteed not to be opened in advance.

(4) During fishing, the shifting fork I14 and the shifting fork II 23 are connected by the connecting rod 16, and synchronous motion can be realized. When the pipe column is lifted up, the inclined plane D at the upper end of the shifting fork II 21 is in contact with the cambered surface H of the slip sheet 15, the slip sheet 15 is forced to rotate along the pin shaft 18, and the fishing success rate is guaranteed.