CN115263222A - Dual fixed anti-drop's a sucker rod overshot - Google Patents
Dual fixed anti-drop's a sucker rod overshot Download PDFInfo
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- CN115263222A CN115263222A CN202211196338.XA CN202211196338A CN115263222A CN 115263222 A CN115263222 A CN 115263222A CN 202211196338 A CN202211196338 A CN 202211196338A CN 115263222 A CN115263222 A CN 115263222A
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- 230000009977 dual effect Effects 0.000 title claims description 8
- 238000001125 extrusion Methods 0.000 claims description 44
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007787 solid Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 6
- 238000005553 drilling Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
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- Marine Sciences & Fisheries (AREA)
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Abstract
The invention provides a double-fixed anti-falling sucker rod overshot, which relates to the technical field of sucker rod overshots and comprises a top connector, wherein the top connector is sequentially connected with a first barrel, a second barrel and a guide shoe, the guide shoe is used for guiding and positioning the upper end of a sucker rod, chutes are circumferentially arranged on the annular surface in the first barrel at equal intervals, a guide plate is slidably connected in the chute of the first barrel, the guide plate is provided with a limiting chute, a limiting round shell is fixedly connected between the guide plates, the limiting round shell and the first barrel are coaxially arranged, an annular net bag is arranged at the inner top of the limiting round shell, and the limiting round shell is provided with a limiting trigger component. Has the advantages that: utilize annular string bag to tighten up simultaneously sucker rod and link fixed, make the sucker rod receive the comprehensive parcel of annular string bag, improve the fixed effect of annular string bag to the sucker rod, annular string bag upwards draws the sucker rod of dragging, and annular string bag further tightens up, and increase annular string bag avoids the sucker rod to lose fixedly at the in-process that goes upward.
Description
Technical Field
The invention relates to the technical field of sucker rod overshot, in particular to a double-fixed anti-falling sucker rod overshot.
Background
In the process of oil field exploitation, the sucker rod is broken due to eccentric wear in the oil pumping process, the broken sucker rod can directly influence the normal production of an oil well, the sucker rod overshot extends into the underground through a drill rod and is fixed on the broken sucker rod in the prior art, and the broken sucker rod is taken out of the oil well by lifting the drill rod.
When current sucker rod overshot was fixed the sucker rod, the slips can only contact the link of sucker rod, and area of contact between slips and the sucker rod link is less to can adhesion paraffin and oil on the sucker rod, lead to lifting the in-process of pulling the sucker rod upwards, the link of sucker rod easily and take place to skid between the slips and drop, take place the accident in the pit again very likely.
Disclosure of Invention
In order to overcome the defects of the prior sucker rod overshot, a double-fixed anti-falling sucker rod overshot is provided.
The technical scheme of the invention is as follows: a dual-fixed anti-falling sucker rod overshot comprises a top connector, wherein the top connector is sequentially connected with a first cylinder, a second cylinder and a guide shoe, the guide shoe is used for guiding and positioning the upper end of a sucker rod, chutes are formed in the circumferential direction of an inner ring surface of the first cylinder at equal intervals, guide plates are connected in the chutes in a sliding mode and provided with limiting chutes, limiting round shells are fixedly connected among the guide plates and coaxially arranged with the first cylinder, annular net bags for sleeving and fixing the sucker rod are installed inside the limiting round shells, limiting trigger assemblies for limiting the annular net bags are arranged on the limiting round shells, the upper end of the sucker rod extrudes the limiting round shells, the compressed annular net bags are released and attached to the outer side surface of the sucker rod, the contraction force of the annular net bags is increased along with the increase of the tensile force borne by the sucker rod, an extrusion fixing mechanism for extruding and fixing the sucker rod is arranged on the inner side surface of the second cylinder, and the extrusion fixing mechanism is matched with the annular net bags to perform dual fixation on the sucker rod; the upper part of the annular net bag is contracted towards the middle and fixedly connected to the top center of the limiting round shell, anti-skid lines are arranged on the inner ring surface of the annular net bag, and the lower end of the annular net bag is connected with a balancing weight which is used for enabling the annular net bag to be quickly released downwards and tightened towards the middle;
spacing subassembly that triggers is including the slide bar that circumference equidistant set up, slide bar sliding connection is in the spacing spout of deflector, be provided with first spring between the downside of deflector and the adjacent slide bar, the one end rigid coupling of slide bar has the guide bar, the inner rotation of guide bar is connected with the live-rollers that are used for reducing frictional force, the other end rigid coupling of slide bar has the arc limiting plate spacing to annular string bag, the downside rigid coupling of top connection have with guide bar extrusion fit's toper platform.
Furthermore, the diameter of the inner ring surface of the arc limiting plate is smaller than that of the inner ring surface of the limiting circular shell, and the arc limiting plate is magnetic and is connected with the counterweight at the lower end of the annular net bag in a magnetic manner.
Further, extrusion fixed establishment is including the sliding sleeve, sliding sleeve sliding connection is in the interior anchor ring of second barrel, the equidistant through-hole that is used for spacing of outer anchor ring circumference of sliding sleeve, the equidistant sliding connection of sliding sleeve circumference has the arc slips, the interior anchor ring rigid coupling of second barrel has with the spacing extrusion shell of arc slips complex, the lower part of spacing extrusion shell sets up to frustum shape, the arc slips is located spacing extrusion shell, the interior anchor ring rigid coupling of second barrel has first solid fixed ring, be provided with the second spring between first solid fixed ring and the sliding sleeve, the interior anchor ring rigid coupling of second barrel has the solid fixed ring of second, the solid fixed ring circumference of second is equidistant to be provided with the spout, the solid fixed ring of second is located the upside of first solid fixed ring, the solid fixed ring of second is provided with and is used for carrying out spacing connection spacing subassembly to the sliding sleeve.
Furthermore, the inner ring surface of the arc-shaped slip is provided with sawtooth-shaped anti-slip strips at equal intervals, and the lower side of the arc-shaped slip is provided with an inclined surface matched with the inner side surface of the limiting extrusion shell.
Further, connect spacing subassembly including the fixed column, fixed column circumference equidistant rigid coupling in the solid fixed ring's of second side of going up, sliding connection has the connecting rod in the solid fixed ring's of second spout, the fixed column passes adjacent connecting rod and rather than sliding connection, the lower extreme of connecting rod sets up to the hook-shaped and cooperates with the through-hole of sliding sleeve, be used for fixing the position of sliding sleeve, be provided with reset spring between fixed column and the adjacent connecting rod, the upper end rigid coupling of connecting rod has first elastic plate, first elastic plate makes the connecting rod remove the fixed to sliding sleeve 301 to the outside.
Furthermore, the lower end of the limiting extrusion shell is communicated with a guide shell, the guide shell is in a frustum shape, the lower part of the guide shell is fixedly connected with the inner annular surface of the second cylinder, and the guide shell is used for limiting and guiding the upper end of the sucker rod.
Further, still including the fixing base of symmetry formula rigid coupling in the interior anchor ring surface of guide shoe, the fixing base articulates through the connecting rod has and is used for carrying on spacing card to sucker rod circular bead department, and the inner of spacing card sets up to arc, and the interior anchor ring diameter of spacing card is less than the diameter of sucker rod link and is greater than the oil pumping diameter, is provided with the torsional spring between the connecting rod of fixing base and the adjacent spacing card, and the downside rigid coupling of fixing base has and is used for restricting spacing card downward swinging's baffle.
Further, still including the equidistant rigid coupling of circumference in the second elastic plate of the interior anchor ring face of guide shoe, the inner rigid coupling of second elastic plate has the clearance scraper blade that is used for clearing up sucker rod adhesion impurity, and upper and lower adjacent clearance scraper blade is crisscross each other, and the downside of clearance scraper blade is provided with the arc that is used for the direction to impurity, and the clearance scraper blade sets up to the elastic material for increase the area of contact of clearance scraper blade and sucker rod.
The invention has the following beneficial effects:
1. the sucker rod and the connecting end are simultaneously tightened and fixed by utilizing the annular net bag, so that the sucker rod is completely wrapped by the annular net bag, the fixing effect of the annular net bag on the sucker rod is improved, the annular net bag is further tightened along with the sucker rod pulled upwards by the annular net bag, the tightening force of the annular net bag on the sucker rod is increased, and the sucker rod is prevented from losing fixation and falling in the ascending process; when the annular net bag is released from fixing the sucker rod, the annular net bag only needs to be moved upwards to reset, the deformation of the annular net bag loses the fixation of the sucker rod, and the sucker rod is convenient and fast to disassemble.
2. Utilize four arc slips and spacing extrusion shell to mutually support, make the sucker rod link pass through simultaneously, the sucker rod drives four arc slips downstream extrusion spacing extrusion shells through frictional force, and four arc slips receive the extrusion force adduction, make four arc slips extrude fixedly to the polished rod department of sucker rod, through four arc slips and the dual fixed of annular string bag, improve the success rate of salvaging the sucker rod.
3. Utilize the clearance scraper blade to follow the sucker rod downstream and clear up impurity such as paraffin and oil on the sucker rod, take place to skid when avoiding annular string bag and arc slips to the sucker rod is fixed, the clearance effect to the sucker rod is improved to the clearance scraper blade that interlocks each other, and the arc on the clearance scraper blade has reduced impurity simultaneously and has remained, has improved the clearance effect of clearance scraper blade to the sucker rod.
4. Utilize two spacing clamps to sucker rod reducing circular bead department spacing, avoid annular string bag and arc slips to fixed failure of sucker rod, cause the sucker rod to fall downwards, cause the damage to the oil-well pump in the well.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic sectional perspective view of the present invention.
Fig. 3 is a partially sectional perspective structure diagram of the present invention.
Fig. 4 is a schematic perspective view of the position-limiting trigger assembly of the present invention.
Fig. 5 is a schematic cross-sectional three-dimensional structure diagram of the limiting round shell of the present invention.
Fig. 6 is a schematic bottom perspective view of a part of the position-limiting trigger set according to the present invention.
Fig. 7 is a schematic perspective view of the pressing and fixing mechanism of the present invention.
Fig. 8 is a partially cut-away perspective view of the fixing device of the present invention.
Fig. 9 is a schematic perspective view of the connection limiting assembly of the present invention.
Fig. 10 is a partially cut-away perspective view of the connection limiting assembly of the present invention.
Fig. 11 is a schematic sectional perspective view of the guide shoe of the present invention.
Fig. 12 is a schematic bottom perspective view of the cleaning scraper of the present invention.
In the reference symbols: 101-top joint, 102-first cylinder, 103-second cylinder, 104-guide shoe, 201-guide plate, 202-limiting round shell, 203-annular net bag, 204-sliding rod, 205-first spring, 206-guide rod, 207-arc limiting plate, 208-conical table, 301-sliding sleeve, 302-arc slip, 303-limiting extrusion shell, 304-first fixing ring, 305-second spring, 306-second fixing ring, 307-fixing column, 308-connecting rod, 309-reset spring, 310-first elastic plate, 311-guide shell, 401-fixing seat, 402-limiting clamp, 404-torsion spring, 404-baffle, 501-second elastic plate and 502-cleaning scraper.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of systems and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Example 1
A double-fixed anti-drop sucker rod overshot is disclosed, referring to fig. 1-10, comprising a top connector 101, the lower end of the top connector 101 is connected with a first cylinder 102 by screw thread, the lower end of the first cylinder 102 is connected with a second cylinder 103 by screw thread, the lower end of the second cylinder 103 is connected with a guide shoe 104 for guiding and positioning the upper end of the sucker rod by screw thread, the inner ring surface of the first cylinder 102 is provided with chutes at equal intervals along the circumference direction, the chutes are connected with a guide plate 201 in sliding way, the guide plate 201 is provided with a limit chute, a limit round shell 202 is welded between the guide plates 201, the limit round shell 202 and the first cylinder 102 are coaxially arranged, the inner top of the limit round shell 202 is fixedly connected with an annular net bag 203 for sleeving and fixing the sucker rod by a mounting plate, the upper part of the annular net bag 203 is collected towards the middle and fixedly connected to the top center of the limit round shell 202, the annular net bag 203 pulls the sucker rod upwards, the annular net bag 203 is deformed and contracted towards the middle, the contraction force generated by the annular net bag 203 fixes the sucker rod, the inner ring surface of the annular net bag 203 is provided with anti-skid lines to avoid slipping between the annular net bag 203 and the sucker rod, the lower end of the annular net bag 203 is bound with a balancing weight through a connecting rope, the balancing weight drops quickly, the annular net bag 203 is released quickly and fixes the sucker rod quickly, the reduction of the tightening force on the sucker rod caused by the annular net bag 203 not being released is avoided, the limiting round shell 202 is provided with a limiting trigger component for limiting the annular net bag 203, the limiting round shell 202 is extruded at the upper end of the sucker rod, the compressed annular net bag 203 is released and attached to the outer side surface of the sucker rod, the contraction force of the annular net bag 203 is increased along with the increase of the tensile force borne by the sucker rod, the inner side surface of the second barrel 103 is provided with an extrusion fixing mechanism for extruding and fixing the sucker rod, the extrusion fixing mechanism is matched with the annular net bag 203 to carry out double fixation on the sucker rod.
Referring to fig. 3-6, the limiting trigger assembly includes sliding rods 204 arranged at equal intervals in the circumferential direction, the sliding rods 204 are slidably connected in limiting sliding grooves of the guide plate 201, a first spring 205 is fixedly connected between the lower side of the guide plate 201 and the adjacent sliding rods 204, guide rods 206 are welded at the upper ends of the sliding rods 204, rotating wheels for reducing friction are rotatably connected to the inner ends of the guide rods 206, arc-shaped limiting plates 207 for limiting the annular string bag 203 are welded at the lower ends of the sliding rods 204, the diameter of the inner ring surface of each arc-shaped limiting plate 207 is smaller than that of the inner ring surface of the limiting circular shell 202, the arc-shaped limiting plates 207 are magnetic and are magnetically connected with objects at the lower end of the annular string bag 203, the arc-shaped limiting plates 207 adsorb the objects at the lower end of the annular string bag 203 through magnetic force, the objects at the lower end of the annular string bag 203 are prevented from being vibrated in the process of being placed down along a hoistway, the arc-shaped limiting plates 207 lose the limiting of the lower ring-shaped string bag 203 to prematurely release the annular string bag 203, a conical platform 208 in a bolted connection with the lower side of the top joint 101, the four guide rods 206 respectively drive the sliding rods 204 to be away from the outer side of the annular string bag 203, and the annular string bag 203 to release the annular string bag to be tightened down.
Referring to fig. 7-10, the extrusion fixing mechanism includes a sliding sleeve 301, the sliding sleeve 301 is slidably connected to an inner annular surface of the second cylinder 103, through holes for limiting are circumferentially and equidistantly formed in an outer annular surface of the sliding sleeve 301, the sliding sleeve 301 is circumferentially and equidistantly slidably connected with four arc slips 302, a limiting extrusion shell 303 matched with the arc slips 302 is welded to the inner annular surface of the second cylinder 103, saw-tooth-shaped anti-slip strips are equidistantly formed in an inner annular surface of the arc slips 302 to increase friction between the arc slips 302 and the sucker rod and avoid slipping when the sucker rod is lifted upwards, an inclined surface matched with an inner side surface of the limiting extrusion shell 303 is arranged on a lower side of the arc slips 302, a lower portion of the limiting extrusion shell 303 is in a frustum shape, the arc slips 302 are tightened inwards after being subjected to extrusion force of the limiting extrusion shell 303, fix the sucker rod, arc slips 302 is located spacing extrusion shell 303, the interior anchor ring welding of second barrel 103 has first solid fixed ring 304, be provided with second spring 305 between first solid fixed ring 304 and the sliding sleeve 301, the medial surface that makes arc slips 302 through second spring 305 contacts and extrudes the sucker rod all the time, the interior anchor ring welding of second barrel 103 has the solid fixed ring 306 of second, the solid fixed ring 306 circumference equidistant slide groove that is provided with of second, the solid fixed ring 306 of second is located the upside of first solid fixed ring 304, the solid fixed ring 306 of second is provided with and is used for carrying out spacing connection spacing subassembly to sliding sleeve 301, it is spacing to sliding sleeve 301 and arc slips 302 to connect spacing subassembly, make the link of sucker rod pass four arc slips 302.
Referring to fig. 9 and 10, the connection limiting assembly includes fixing posts 307, the fixing posts 307 are welded to the upper side surface of the second fixing ring 306 at equal intervals in the circumferential direction, a connecting rod 308 is slidably connected in a sliding groove of the second fixing ring 306, the fixing posts 307 pass through and are slidably connected with adjacent connecting rods 308, the lower ends of the connecting rods 308 are hook-shaped and are matched with a through hole of the sliding sleeve 301 for fixing the position of the sliding sleeve 301, a return spring 309 is arranged between the fixing posts 307 and the adjacent connecting rods 308, a first elastic plate 310 is bolted to the upper ends of the connecting rods 308, and the first elastic plate 310 enables the connecting rods 308 to move outwards to release the fixing of the sliding sleeve 301.
Referring to fig. 7, the lower end of the limiting extrusion shell 303 is communicated with a guide shell 311, the guide shell 311 is in a frustum shape, the lower portion of the guide shell 311 is welded with the inner annular surface of the second cylinder 103, the guide shell 311 is used for guiding the upper end of the sucker rod, and the phenomenon that the sucker rod collides with the limiting extrusion shell 303 and cannot be fixed, so that the sucker rod is failed to be salvaged is avoided.
When a down-hole sucker rod is fished, the top connector 101 is connected to a drill rod, the drill rod is released into the well, the top connector 101, the first barrel 102 and parts on the first barrel are lowered into the well until the drill rod reaches a fishing station, the drill rod is driven to rotate and is released downwards again, the guide shoes 104 move downwards to guide the sucker rod to enter the inside of the second barrel 103, the top connector 101 and the parts on the top connector are moved downwards along with the lowered drilling rod, the sucker rod passes through the guide shell 311, the guide shell 311 guides the upper end of the sucker rod, the phenomenon that the upper end of the sucker rod is deflected and impacts the lower end of the limiting extrusion shell 303 to prevent the upper end of the sucker rod from fixing the sucker rod and causing failure in fishing the sucker rod is avoided, the sucker rod passes through the limiting extrusion shell 303 and the adjacent arc slips 302, and the diameter of the reducing shoulder of the sucker rod is smaller than the distance between the four arc slips 302, four first elastic plates 310 are extruded in the connecting end outside of the sucker rod, deformation occurs after the first elastic plates 310 are extruded, four first elastic plates 310 push adjacent connecting rods 308 to the outside respectively, and compress the reset spring 309, four connecting rods 308 are far away from the sliding sleeve 301, the connecting rods 308 are separated from adjacent through holes on the sliding sleeve 301, the limitation to the sliding sleeve 301 is relieved, under the action of the second spring 305, the sliding sleeve 301 drives four arc slips 302 to move downwards along the inner ring surface of the limiting extrusion shell 303, the four arc slips 302 are extruded by the limiting extrusion shell 303, the four arc slips 302 are close to the sucker rod and are attached to the sucker rod, the drill rod moves downwards, and the four arc slips 302 and the sucker rod slide relatively.
The sucker rod enters the limiting round shell 202, the upper end of the sucker rod upwards extrudes the limiting round shell 202 along with downward movement of the drill rod, the limiting round shell 202 upwards slides along the first barrel 102 through the guide plate 201, the rotating wheels at the inner ends of the four guide rods 206 contact the conical table 208, the four guide rods 206 are extruded to respectively drive the adjacent sliding rods 204 to move outwards, the four sliding rods 204 respectively drive the arc limiting plates 207 on the four sliding rods to be far away from the annular net bag 203 and extrude the first spring 205, the annular net bag 203 loses the limiting of the four arc limiting plates 207, the weights at the lower ends of the arc limiting plates 207 and the annular net bag 203 lose magnetic connection, before the drill rod contacts the top in the limiting round shell 202, the arc limiting plates 207 are magnetically connected with the weights at the lower end of the annular net bag 203, the phenomenon that the weights and the arc limiting plates 207 lose the matching in the downward movement process of the annular net bag 203, the annular net bag 203 is prematurely released and contracted on the outer side surface of the sucker rod, and the annular net bag 203 is rapidly released and contracted on the outer side surface of the sucker rod after the drill rod is placed and pulled upwards.
The drill rod is lifted upwards to enable the limiting round shell 202 to move downwards along the first barrel 102 through the guide plate 201, the four guide rods 206 lose contact with the conical table 208, the sliding rod 204 resets under the elastic action of the first spring 205, the drill rod is lifted upwards to enable the annular net bag 203 to be tightened on the outer side face of the sucker rod, the sucker rod and the connecting end are both subjected to the tightening force of the annular net bag 203, the sucker rod is pulled upwards along with the annular net bag 203, the annular net bag 203 is further tightened, the tightening force of the annular net bag 203 on the sucker rod is increased, and the sucker rod is prevented from losing fixing and dropping in the ascending process.
Upwards pull the drilling rod and make second barrel 103 drive spacing extrusion shell 303 rebound, four arc slips 302 through with the extrusion force between the sucker rod along spacing extrusion shell 303 rebound, zigzag on four arc slips 302 has increased and the sucker rod between frictional force, four arc slips 302 receive the extrusion force adduction of spacing extrusion shell 303 to fix the sucker rod, utilize four arc slips 302 and the dual fixed of annular string bag 203, improve the success rate of salvaging the sucker rod, drilling rod rebound to the well head, accomplish the salvage to the sucker rod.
After the sucker rod reaches the ground, the staff disconnects the connection between the first cylinder 102 and the second cylinder 103, pushes the counter weights at the lower end of the annular net bag 203 to reset, so that the annular net bag 203 is attached to the inner annular surface of the limiting circular shell 202 again, the annular net bag 203 loses the fixation on the sucker rod, the staff resets the sliding sleeve 301 and the four arc-shaped slips 302 and takes out the sucker rod from the four arc-shaped slips 302 and the annular net bag 203, and the staff reconnects the first cylinder 102 and the second cylinder 103.
Example 2
On the basis of embodiment 1, as shown in fig. 11, the sucker rod fixing device further comprises a fixing seat 401 symmetrically welded to an inner annular surface of the guide shoe 104, the fixing seat 401 is hinged with a limiting clamp 402 used for limiting the shoulder of the sucker rod through a connecting rod 308, the inner end of the limiting clamp 402 is arc-shaped, the diameter of the inner annular surface of the limiting clamp 402 is smaller than the diameter of the shoulder of the sucker rod and larger than the diameter of the sucker rod, the two limiting clamps 402 limit the shoulder of the sucker rod to prevent the sucker rod from falling downwards due to loss of fixation, a torsion spring 403 is arranged between the connecting rod 308 of the fixing seat 401 and the adjacent limiting clamp 402, and a baffle 404 used for limiting the limiting clamp 402 to swing downwards is welded on the lower side of the fixing seat 401.
After two spacing cards 402 are extruded to the reducing shoulder department of sucker rod, two spacing cards 402 are along adjacent fixing base 401 upswing, torsional spring 403 is screwed, when two spacing cards 402 contact the polished rod department of sucker rod, make two spacing cards 402 reset fast and ring cover on the sucker rod under torsional spring 403's effect, when the sucker rod is losing the fixed of annular string bag 203 and arc slips 302 to carrying the in-process of drawing, the sucker rod is downward, the reducing shoulder department landing of sucker rod is middle to two spacing cards 402, it is spacing to utilize two spacing cards 402 to sucker rod reducing shoulder department, avoid annular string bag 203 and arc slips 302 to fixed failure of sucker rod, cause the sucker rod to fall downwards, cause the damage to the oil-well pump in the well.
Referring to fig. 11 and 12, still including the second elastic plate 501 of circumference equidistant bolted connection in guide 104 inner ring face, the inner bolted connection of second elastic plate 501 has the clearance scraper blade 502 that is used for clearing up sucker rod adhesion impurity, clearance scraper blade 502 laminates and clears up in the outside of sucker rod to face impurity such as paraffin and sump oil of sucker rod adhesion, avoid taking place to skid between annular string bag 203 and the arc slips 302, adjacent clearance scraper blade 502 interlocks from top to bottom, the downside of clearance scraper blade 502 is provided with the arc that is used for the direction to impurity, the arc of clearance scraper blade 502 prevents that the impurity that clears up down from flowing to both sides, the volume of remaining of sucker rod lateral surface impurity has been reduced, clearance scraper blade 502 sets up to the elastic material, be used for increasing the area of contact of clearance scraper blade 502 and sucker rod, improve the clearance effect of clearance scraper blade 502 to the sucker rod.
After the upper end of sucker rod entered into guide 104, along with the upper end extrusion clearance scraper blade 502 that the drilling rod downshifted made the sucker rod, second elastic plate 501 takes place the deformation bending and clearance scraper blade 502 laminating is at the lateral surface of sucker rod, along with clearance scraper blade 502 along the sucker rod downshifting to the sucker rod impurity such as paraffin and oil clear up, avoid annular string bag 203 and arc slips 302 to take place to skid when fixed to the sucker rod, crisscross clearance scraper blade 502 clears up the sucker rod lateral surface comprehensively, and the arc plate on the clearance scraper blade 502 has reduced impurity and has remained, the clearance effect of clearance scraper blade 502 to the sucker rod has been improved.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (8)
1. The utility model provides a dual fixed anti-drop's sucker rod overshot, including top connection (101), top connection (101) connect gradually first barrel (102), second barrel (103) and guide shoe (104), guide shoe (104) are used for leading the upper end of sucker rod to fix, a serial communication port, the annular face circumference is equidistant to be provided with the spout in first barrel (102), and sliding connection has deflector (201) in the spout, deflector (201) are provided with spacing spout, rigid coupling has spacing shell (202) between deflector (201), spacing shell (202) and first barrel (102) coaxial setting, the internally mounted of spacing shell (202) is used for the annular string bag (203) of suit fixed sucker rod, spacing shell (202) are provided with the spacing trigger assembly that is used for spacing annular string bag (203), the upper end extrusion spacing shell (202) of sucker rod, compressed annular string bag (203) release and laminating in the lateral surface of sucker rod, the shrink power of annular string bag (203) increases along with the increase of the pulling force that receives, the medial surface is used for the fixed sucker rod fixed string bag of fixed sucker rod (103) extrudees the mechanism with sucker rod fixed double extrusion mechanism; the upper part of the annular net bag (203) is contracted towards the middle and fixedly connected to the top center of the limiting round shell (202), anti-skid lines are arranged on the inner ring surface of the annular net bag (203), the lower end of the annular net bag (203) is connected with a balancing weight, and the balancing weight is used for enabling the annular net bag (203) to be rapidly released downwards and tightened towards the middle;
spacing subassembly that triggers is including slide bar (204) that circumference equidistant setting, slide bar (204) sliding connection is in the spacing spout of deflector (201), be provided with first spring (205) between downside and adjacent slide bar (204) of deflector (201), the one end rigid coupling of slide bar (204) has guide bar (206), the inner rotation of guide bar (206) is connected with the rotation wheel that is used for reducing frictional force, the other end rigid coupling of slide bar (204) has arc limiting plate (207) spacing annular string bag (203), the downside rigid coupling of top joint (101) has with guide bar (206) extrusion fit's toper platform (208).
2. The dual fixed anti-drop overshot for the sucker rod according to claim 1, wherein the diameter of the inner ring surface of the arc limiting plate (207) is smaller than that of the inner ring surface of the limiting circular shell (202), and the arc limiting plate (207) has magnetism and is magnetically connected with the counterweight at the lower end of the annular net bag (203).
3. The dual-fixed anti-drop sucker rod overshot of claim 1, wherein the extrusion fixing mechanism comprises a sliding sleeve (301), the sliding sleeve (301) is slidably connected to the inner annular surface of the second cylinder body (103), through holes for limiting are circumferentially arranged on the outer annular surface of the sliding sleeve (301) at equal intervals, the sliding sleeve (301) is circumferentially and slidably connected with arc slips (302) at equal intervals, a limiting extrusion shell (303) matched with the arc slips (302) is fixedly connected to the inner annular surface of the second cylinder body (103), the lower portion of the limiting extrusion shell (303) is in a frustum shape, the arc slips (302) are located in the limiting extrusion shell (303), a first fixing ring (304) is fixedly connected to the inner annular surface of the second cylinder body (103), a second spring (305) is arranged between the first fixing ring (304) and the sliding sleeve (301), a second fixing ring (306) is fixedly connected to the inner annular surface of the second cylinder body (103), sliding grooves are circumferentially arranged at equal intervals on the second fixing ring (306), the second fixing ring (306) is located on the upper side of the first fixing ring (304), and the second fixing ring (306) is arranged to connect the limiting assembly (301).
4. The dual-fixed anti-drop sucker rod overshot of claim 3, wherein the inner ring surface of the arc slip (302) is provided with saw-tooth-shaped anti-slip strips at equal intervals, and the lower side of the arc slip (302) is provided with an inclined surface matched with the inner side surface of the limiting extrusion shell (303).
5. The dual-fixed anti-falling sucker rod overshot of claim 4, characterized in that the connection limiting assembly comprises fixing columns (307), the fixing columns (307) are circumferentially and equidistantly fixedly connected to the upper side surface of the second fixing ring (306), connecting rods (308) are slidably connected in sliding grooves of the second fixing ring (306), the fixing columns (307) penetrate through the adjacent connecting rods (308) and are slidably connected with the adjacent connecting rods (308), the lower ends of the connecting rods (308) are hook-shaped and are matched with through holes of the sliding sleeve (301) for fixing the position of the sliding sleeve (301), return springs (309) are arranged between the fixing columns (307) and the adjacent connecting rods (308), the upper ends of the connecting rods (308) are fixedly connected with first elastic plates (310), and the first elastic plates (310) enable the connecting rods (308) to move outwards to release the fixing of the sliding sleeve (301).
6. The dual-fixed anti-falling off sucker rod overshot of claim 5, characterized in that the lower end of the limiting extrusion shell (303) is communicated with a guide shell (311), the guide shell (311) is set to be frustum-shaped, the lower part of the guide shell (311) is fixedly connected with the inner annular surface of the second cylinder (103), and the guide shell (311) is used for limiting and guiding the upper end of the sucker rod.
7. The dual-fixed anti-falling sucker rod overshot of claim 1, further comprising a fixed seat (401) symmetrically fixedly connected to the inner annular surface of the guide shoe (104), wherein the fixed seat (401) is hinged with a limit clip (402) for limiting the shoulder of the sucker rod through a connecting rod (308), the inner end of the limit clip (402) is arc-shaped, the diameter of the inner annular surface of the limit clip (402) is smaller than the diameter of the connecting end of the sucker rod and larger than the diameter of the sucker rod, a torsion spring (403) is arranged between the connecting rod (308) of the fixed seat (401) and the adjacent limit clip (402), and a baffle (404) for limiting the limit clip (402) to swing downwards is fixedly connected to the lower side of the fixed seat (401).
8. The dual fixed anti-drop overshot for the sucker rod according to claim 1, further comprising a second elastic plate (501) circumferentially and equidistantly fixedly connected to the inner annular surface of the guide shoe (104), wherein a cleaning scraper (502) for cleaning adhesion impurities of the sucker rod is fixedly connected to the inner end of the second elastic plate (501), the upper and lower adjacent cleaning scrapers (502) are staggered with each other, an arc-shaped plate for guiding the impurities is arranged on the lower side of the cleaning scraper (502), and the cleaning scraper (502) is made of elastic material for increasing the contact area between the cleaning scraper (502) and the sucker rod.
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| CN202211196338.XA CN115263222B (en) | 2022-09-29 | 2022-09-29 | Dual fixed anti-drop's a sucker rod socket |
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| CN202211196338.XA CN115263222B (en) | 2022-09-29 | 2022-09-29 | Dual fixed anti-drop's a sucker rod socket |
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| CN115263222A true CN115263222A (en) | 2022-11-01 |
| CN115263222B CN115263222B (en) | 2022-12-02 |
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| CN116752923A (en) * | 2023-08-16 | 2023-09-15 | 牡丹江市林海石油打捞工具有限公司 | Screw pump hydraulic overshot |
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| CN116752923B (en) * | 2023-08-16 | 2023-11-07 | 牡丹江市林海石油打捞工具有限公司 | Screw pump hydraulic overshot |
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| CN115263222B (en) | 2022-12-02 |
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