CN203362093U - Claw hook type overshot - Google Patents
Claw hook type overshot Download PDFInfo
- Publication number
- CN203362093U CN203362093U CN 201320393168 CN201320393168U CN203362093U CN 203362093 U CN203362093 U CN 203362093U CN 201320393168 CN201320393168 CN 201320393168 CN 201320393168 U CN201320393168 U CN 201320393168U CN 203362093 U CN203362093 U CN 203362093U
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- China
- Prior art keywords
- hook type
- claw hook
- cylindrical shell
- fishing socket
- type fishing
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- Expired - Fee Related
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Abstract
The utility model discloses a claw hook type overshot which comprises a cylinder body (102), a fishing grab (110) and an upper joint (101). The fishing grab (110) is placed in a cavity of the cylinder body (102), a certain space allowing moving up and down is formed, and thus a falling object (300) can be conveniently fished. When the falling object is fished to the ground, and a ground unclamping tool (200) can be utilized to enable the fishing grab (110) of the claw hook type overshot (100) to be opened and enable the falling object to be released. The claw hook type overshot (100) enables the falling object to be fished to the ground conveniently, simply and safely, fishing efficiency is high, damage to the falling object is small, the claw hook type overshot is provided with the special unclamping tool (200) and is safer, easier and more convenient, the falling object is released in a labor saving mode, and the ground unclamping tool (200) also overcomes the defect that non-firmness is caused due to the facts that the falling object is fastened reversely and released through screws on the bottom according to a traditional method and fixing bolts easily fall off in a well.
Description
Technical field
The utility model relates to a kind of fishing tool of oil field development underground work, is specifically related to a kind of claw hook type fishing socket.
Background technology
In the manufacturing process of oil field development underground work, often due to reasons such as down-hole accidents, oil-water well can not normally be produced, after down-hole bit freezing and trouble of lost tool in hole particularly occur, will cause the reduce or stop production of oil-water well, when serious, oil-water well is scrapped.Therefore preventing the generation of down-hole accident, process rapidly down-hole accident, is to guarantee the normal important measures of producing in oil field.And fishing socket is the useful tool for oil-water well fishing junk fast processing, although up to the present the technical patent of relevant fishing socket has a lot, but need to understand fully the shape, size, character of junk etc. when processing the oil-water well fishing junk, could select more suitable fishing tool to be able to junk quicker, safer, salvage more securely.And current fishing socket is all slip-type, and release function fits over the fishing socket below by engage thread back-off locking junk and discharges junk, can Yin Kawa the clamping of junk be caused to damage to junk and salvage junk with this slip-type fishing socket, the junk of some well-regulated instruments and pieces of equipment class particularly, can make this class junk salvaged cancel because of damage, the shortcoming that this slip-type fishing socket also exists is that its release function fits over the fishing socket below, make in the salvaging process locking junk inconvenient but also easily come off, make the releasing tool of fishing socket come off to cause to increase in well and salvage difficulty.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of claw hook type fishing socket, it can prevent that the junk to well-regulated instrument and pieces of equipment class from causing damage and can improve fishing success ratio, and the ground releasing tool is not gone into the well easily to come off with fishing socket and caused the hidden danger of secondary junk with the go into the well instrument that can eliminate in salvaging process releasing tool or release function class of claw hook type fishing socket.
For solving the problems of the technologies described above, the utility model provides a kind of claw hook type fishing socket, this claw hook type fishing socket has cylindrical shell, bailer grab and the large parts of top connection three, its cylindrical shell comprises barrel and is surrounded the cavity that holds formed by barrel, the bottom of described barrel has the section of getting out of a predicament or an embarrassing situation of extending to inner barrel, the middle part of this barrel surrounds the diameter that holds cavity formed and is greater than the diameter that remainder holds cavity, the section of namely getting out of a predicament or an embarrassing situation excessively is provided with 90 degree steps or 45 degree steps to holding more greatly cavity, in order with the ground releasing tool, to be used in conjunction with to discharge junk, the barrel top of this cylindrical shell is provided with a plurality of the first pin holes and all on the same circumference of cylindrical shell, the second pin hole on these first pin holes and ground releasing tool is corresponding and can through the first pin hole and the second corresponding pin hole, make thin bar fishing socket and ground releasing tool keep mutual inactive state simultaneously, contribute to like this ground releasing tool to discharge the junk of fishing socket.Preferably on barrel, be provided with the middle flow orifice of a plurality of perforations, in this, the flow orifice design, at the cylindrical shell middle part, contributes to the middle flow orifice by cylindrical shell in the salvaging process to reduce the resistance that fishing socket moves up and down.
Its finger catcher is cylinder-like structure, the top of described finger catcher is complete cylinder, bottom along the circumferential direction interval is vertically cut open, to form a plurality of plates that are separated from each other, the lower end of described plates forms kink to the internal bend of cylinder-like structure, only have like this plates bottom that the power outwards strutted is arranged, the plates of this cylinder-like structure will outwards open and the inside power that will recover the cylinder original state arranged, this structure just contributes to catch junk, and can firmly tangle junk by kink, particularly regular or the junk of bailing neck class arranged.Preferably the kink lower end of finger catcher has the inclined-plane that 45 degree tilt, and the inclined-plane that has this 45 degree to tilt can contribute to import junk, and the inclined-plane that junk is tilted by this 45 degree enters in bailer grab, improves and salvages efficiency.
Its top connection is nested in holding in cavity of described cylindrical shell top, and protrudes upward from cylindrical shell, and extension is to facilitate the rope traction salvaging junk of going into the well.This top connection can separate with the cylindrical shell dismounting, so that the ground releasing tool is inserted in cylindrical shell and discharges junk from tearing opening part open, wherein, described finger catcher is arranged on holding in cavity of described cylindrical shell, and can be up or down described get out of a predicament or an embarrassing situation and described top connection bottom between.Preferably the top of described top connection comprises gable top and the cylindrical neck portion that is connected in top, the bottom of described top connection is for having externally threaded cylinder-like structure, and the top of cylindrical shell has internal thread, the internal thread on the external screw thread of top connection bottom and cylindrical shell top is threaded connection, so that top connection is nested in holding in cavity of described cylindrical shell top.Preferably described top connection bottom is provided with the upper flow orifice of a plurality of perforations, on this effect of the middle flow orifice of flow orifice and cylindrical shell the same, be all to reduce the claw hook type fishing socket resistance that the claw hook type fishing socket is walked about up and down in salvaging the junk process.
The ground releasing tool of claw hook type fishing socket also has housing, three piths of pull bar and tapered sleeve form, its housing is lower large little cone tubular structure, the top of described housing is complete cylindrical shell, and the inwall of top cylindrical shell is provided with internal thread, bottom along the circumferential direction interval is vertically cut open, to form a plurality of expansion sets that are separated from each other, can move and make the outside distending of expansion set by the past direction of boring the expansion set minor diameter of tubular structure of tapered sleeve like this.Be nut type on the inwall of the top cylindrical shell of described housing, and be provided with second pin hole corresponding with first pin hole on the barrel top of claw hook type fishing socket.Its pull bar has external screw thread, and pull bar is located in housing, and the internal thread on the inwall of described external screw thread and described housing top cylindrical shell is threaded, and the lower end of pull bar has outward extending pull bar step.Preferably tie rod hole has been opened on the top of described pull bar, and this tie rod hole through to facilitate, utilizing lever principle, can twist convenient and strength-savingly and pull the pull bar of ground releasing tool for other thin bar, discharges better the junk of fishing socket.Its tapered sleeve, it is also lower large little cone tubular structure, tapered sleeve is set in pull bar periphery lower end, tapered sleeve is between pull bar and expansion set, and the inwall upper end of tapered sleeve has the tapered sleeve step extended internally, wherein, the tapered sleeve step is overlapped on the pull bar step, so that the upper shipper pole mantle of pull bar puts to move, makes outwards distending of expansion set (202) again.
To be claw hook type fishing sockets can reduce damage to the fishing junk of well-regulated instrument and pieces of equipment class to the beneficial effects of the utility model, and fishing success ratio is high, the cylindrical shell of this claw hook type fishing socket and top connection have respectively middle flow orifice and upper flow orifice can in the salvaging process, reduce the resistance that the claw hook type fishing socket moves, the extension of top connection is standard bailing neck structure, this Structure Improvement traditional use wire rope that is threaded draw fishing socket and go into the well and be prone to fishing socket and firmly grasp stuck junk and make fishing socket and wire rope be difficult to the situation reclaimed, and this structure guarantees that the safety of these instruments and wire rope is unlikely to accident cover accident.The ground releasing tool of claw hook type fishing socket not only can discharge the junk salvaged quickly and easily from the claw hook type fishing socket, and it does not go into the well with the claw hook type fishing socket, has eliminated the hidden danger that it comes off in well.
The accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of the utility model claw hook type fishing socket;
Fig. 2 is the cross-sectional schematic of the utility model ground releasing tool;
Fig. 3 is the amplification cross-sectional schematic of the utility model claw hook type fishing socket bailer grab nature;
Fig. 4 is that the utility model junk enters the claw hook type fishing socket and the amplification cross-sectional schematic that do not enter the bailer grab state;
Fig. 5 be the utility model junk enter fully grapple and with the amplification cross-sectional schematic of the meshing state of grapple;
Fig. 6 is that the utility model junk is clenched the amplification cross-sectional schematic of state by bailer grab;
Fig. 7 is the amplification cross-sectional schematic that the utility model ground releasing tool discharges claw hook type fishing socket junk.
The specific embodiment
The utility model relates to a kind of fishing tool of oil field development underground work, adopt fishing tool and releasing tool independent separate to open, fishing tool is the junk that the claw hook type fishing socket can be salvaged well-regulated instrument and pieces of equipment class, and releasing tool is that the junk that the ground releasing tool can salvage the claw hook type fishing socket discharges.
Known at Fig. 1, claw hook type fishing socket 100 has cylindrical shell 102, bailer grab 110 and the large parts of top connection 101 3, its cylindrical shell 102 comprises barrel and is surrounded the cavity that holds formed by barrel, the bottom of described barrel has the section of getting out of a predicament or an embarrassing situation 109 of extending to inner barrel, the middle part of this barrel surrounds the diameter that holds cavity formed and is greater than the diameter that remainder holds cavity, the section 109 of namely getting out of a predicament or an embarrassing situation excessively is provided with to holding more greatly cavity the inclined-plane 108 that 90 degree steps or the one 45 degree tilt, in order with the ground releasing tool, to be used in conjunction with to discharge junk, the barrel top of this cylindrical shell is provided with a plurality of the first pin holes 107 and all on the same circumference of cylindrical shell, the second pin hole on these first pin holes 107 and ground releasing tool is corresponding and can through the first pin hole 107 and the second corresponding pin hole, make thin bar fishing socket and ground releasing tool keep mutual inactive state simultaneously, contribute to like this ground releasing tool to discharge the junk of fishing socket.Preferably on barrel, be provided with the middle flow orifice 106 of a plurality of perforations, in this, flow orifice 106 designs, at the cylindrical shell middle part, contribute to the middle flow orifice 106 by cylindrical shell in the salvaging process to reduce the resistance that fishing socket moves up and down.Its finger catcher 110 is cylinder-like structure, the top of described finger catcher 110 is complete cylinder, bottom along the circumferential direction interval is vertically cut open, to form a plurality of plates that are separated from each other, the lower end of described plates forms kink 111 to the internal bend of cylinder-like structure, only have like this plates bottom that the power outwards strutted is arranged, the plates of this cylinder-like structure will outwards open and the inside power that will recover the cylinder original state arranged, this structure just contributes to catch junk, and can firmly tangle junk by kink 111, particularly regular or the junk of bailing neck class arranged.Preferably kink 111 lower ends of finger catcher 110 have the inclined-plane 113 that the 2 45 degree tilts, the inclined-plane 113 that has this 2 45 degree to tilt can contribute to import junk, the inclined-plane 113 that junk is tilted by this 2 45 degree enters in bailer grab better, improves and salvages efficiency.Its top connection 101 is nested in holding in cavity of described cylindrical shell 102 tops, and protrudes upward from cylindrical shell 102, and extension is to facilitate the rope traction salvaging junk of going into the well.This top connection 101 can separate with cylindrical shell 102 dismountings, so that the ground releasing tool is inserted in the interior junk that discharges of cylindrical shell 102 from tearing opening part open, wherein, described finger catcher 110 is arranged on holding in cavity of described cylindrical shell 102, and can described, get out of a predicament or an embarrassing situation between section 109 and described top connection 101 bottoms up or down.Preferably the top of described top connection 101 comprises gable top 104 and the cylindrical neck portion that is connected in top, the bottom of described top connection 101 is for having externally threaded cylinder-like structure, and the top of cylindrical shell 102 has internal thread, the internal thread on the external screw thread of top connection 101 bottoms and cylindrical shell 102 tops is threaded connection, so that top connection 101 is nested in holding in cavity of described cylindrical shell 102 tops.Preferably described top connection 101 bottoms are provided with the upper flow orifice 105 of a plurality of perforations, above the effect of the middle flow orifice 106 of flow orifice 105 and cylindrical shell 102 is the same, is all to reduce claw hook type fishing socket 100 resistance that claw hook type fishing socket 100 is walked about up and down in salvaging the junk process.
Known at Fig. 2, the ground releasing tool 200 of claw hook type fishing socket also has housing 206,203 3 piths of pull bar 201 and tapered sleeve form, its housing 206 is lower large little cone tubular structure, the top of described housing 206 is complete cylindrical shell, and the inwall of top cylindrical shell is provided with internal thread, bottom along the circumferential direction interval is vertically cut open, to form a plurality of expansion sets that are separated from each other 202, can move and make the outside distending of expansion set 202 by the past direction of boring expansion set 202 minor diameters of tubular structure of tapered sleeve 203 like this.Be nut type on the inwall of the top cylindrical shell of described housing 206, and be provided with second pin hole 204 corresponding with first pin hole on the barrel top of claw hook type fishing socket.Its pull bar 201 has external screw thread, and pull bar 201 is located in housing 206, and the internal thread on the inwall of described external screw thread and described housing 206 top cylindrical shells is threaded, and the lower end of pull bar 201 has outward extending pull bar step 207.Preferably tie rod hole 205 has been opened on the top of described pull bar 201, this tie rod hole 205 passes and utilizes lever principle to facilitate for other thin bar, can twist convenient and strength-savingly and pull the pull bar 201 of ground releasing tool, discharge better the junk of claw hook type fishing socket.Its tapered sleeve 203, it is also lower large little cone tubular structure, tapered sleeve 203 is set in pull bar 201 periphery lower ends, tapered sleeve 203 is between pull bar 201 and expansion set 202, and the inwall upper end of tapered sleeve 203 has the tapered sleeve step 208 extended internally, wherein, tapered sleeve step 208 is overlapped on pull bar step 207, so that move and make the outside distending of expansion set 202 again on the upper shipper pole mantle cover 203 of pull bar 201.
Fig. 3 shows under the nature of claw hook type fishing socket bailer grab the bailer grab bottom and makes its hanging sleeve in the cavity of claw hook type fishing socket by the lower step of withstanding the claw hook type fishing socket and can not fall down from the bottom of claw hook type fishing socket, and make bailer grab freely not move up and down regularly in certain cavity of claw hook type fishing socket and to expand, state now is the unexpanded nature of bailer grab, can be that the claw hook type fishing socket is gone into the well and do not run into the situation of junk, for bailer grab can import better junk and hang tight junk, preferably the inboard place of bending of bailer grab kink be 90 degree bending steps 112, bottom design the 2 45 degree inclined-plane 113 of bailer grab kink makes bailer grab contact junk to import in bailer grab better.After Fig. 4 and Fig. 5 show the claw hook type fishing socket and go into the well and run into junk 300, because the go into the well Action of Gravity Field of downward movement velocity and itself of claw hook type fishing socket makes junk 300 enter in the claw hook type fishing socket from the cylinder body bottom 103 of claw hook type fishing socket, and further promote bailer grab 110 and upwards move past by the section of getting out of a predicament or an embarrassing situation 109 inclined-plane 108 the holding in cavity to claw hook type fishing socket cylindrical shell maximum gauge that the one 45 degree tilts, junk 300 and bailer grab 110 together continue on entity ring that the mobile until top of bailer grab 110 touches top connection bottom or the little internal diameter of cylindrical shell to make bailer grab 110 to stop mobile and junk 300 to utilize the power potential energy inclined-plane 113 tilted along bottom the 2 45 degree of bailer grab 110 that continues to move up to make bailer grab plates distending junk 300 be easy to enter in bailer grab 110 again, and firmly tangled by the kink of bailer grab 110.In Fig. 6, be after the bailer grab 110 of claw hook type fishing socket tangles junk 300, the claw hook type fishing socket is pulled on the process on ground with junk 300, now due to the gravity of junk 300 and the effect moved upward, the lower step that the claw hook type fishing socket is withstood in the bailer grab bottom that makes to hang junk makes itself and junk 300 hang in the claw hook type fishing socket and bailer grab enters in the more minor diameter of claw hook type fishing socket bottom 103, make bailer grab catch more firmly junk 300, and do not have releasing tool to discharge junk 300, be can not fall down from the bottom 103 of claw hook type fishing socket, thereby can salvage upper ground surface to junk 300 by the claw hook type fishing socket.
Fig. 7 shows the operation that ground releasing tool 200 discharges the junk 300 that the claw hook type fishing sockets salvage, after claw hook type fishing socket and junk 300 are together pulled on to ground from well, first the top connection 101 of claw hook type fishing socket and cylindrical shell 102 dismountings are separated, then from tearing opening part open, be ground releasing tool 200 that the top nozzle of claw hook type fishing socket cylindrical shell 102 is inserted in cylindrical shell 102, and the expansion set 202 that makes ground releasing tool 200 also is nested in the bailer grab cylindrical shell, make the second pin hole and the corresponding UNICOM of the first pin hole on claw hook type fishing socket cylindrical shell 102 on ground releasing tool 200 simultaneously, then hard thin bar 209 together UNICOM insert the first and second pin holes, after making ground releasing tool 200 and claw hook type fishing socket cylindrical shell 102 fixing, counterclockwise screw thread rotation pull bar 201 makes pull bar 201 outwards move and drive tapered sleeve 203 to move to the direction of expansion set 202 minor diameters, thereby make expansion set 202 tightly be close to the inwall of bailer grab 110 cylindrical shells, until pull bar 201 rotation is motionless, rear thin bar 209 is extracted from the first and second pin holes, upper lifting rod 201 drives on bailer grab 110 and moves, the tension force that the maximum that makes bailer grab 110 together enter into claw hook type fishing socket cylindrical shell 102 with junk 300 is held cavity and the expansion set 202 by ground releasing tool 200 is release conditions to the plates distending of bailer grab 110 by bailer grab 110 discharges the junk 300 salvaged.Preferably tie rod hole 205 is arranged at pull bar 201 tops, when screw thread rotation pull bar 201 is with upper lifting rod 201 counterclockwise, can separately looks for stiff rod to pass tie rod hole 205 and utilize lever principle to rotate and upper lifting rod 201 convenient and strength-savingly.
The utility model versatility strong adaptability, the external diameter small intensity is large, solved in the past and can't have been salvaged by the place of some little interior warp the difficult problem of special junk, the ground releasing tool has prevented the hidden danger of with the claw hook type fishing socket, going into the well and coming off, the upper flow orifice of top connection and claw hook type fishing socket cylindrical shell and middle flow orifice can reduce the resistance in claw hook type fishing socket salvaging process, the standard bailing strength way of the top connection cover accident of can preventing accident, used the bailer grab mode to salvage not only simple and convenient but also special junk is reduced to damage.
Claims (6)
1. a claw hook type fishing socket, is characterized in that, comprising:
Cylindrical shell (102), comprise barrel and surrounded the cavity that holds formed by barrel, the bottom of described barrel has the section of getting out of a predicament or an embarrassing situation (109) of extending to inner barrel, and the middle part of described barrel surrounds the diameter that holds cavity formed and is greater than the diameter that remainder holds cavity;
Finger catcher (110), it is cylinder-like structure, and the top of described finger catcher is complete cylinder, and bottom along the circumferential direction interval is vertically cut open, to form a plurality of plates that are separated from each other, the lower end of described plates forms kink (111) to the internal bend of cylinder-like structure;
Top connection (101), it is nested in holding in cavity of described cylindrical shell (102) top, and protrudes upward from described cylindrical shell (102);
Wherein, described finger catcher (110) is arranged on holding in cavity of described cylindrical shell (102), and can be positioned at up or down between described getting out of a predicament or an embarrassing situation (109) and described top connection (101) bottom.
2. claw hook type fishing socket as claimed in claim 1, is characterized in that, is provided with the middle flow orifice (106) of a plurality of perforations on described barrel.
3. claw hook type fishing socket as claimed in claim 1, is characterized in that, the top of described barrel is provided with the first pin hole (107).
4. claw hook type fishing socket as claimed in claim 1, is characterized in that, the lower end of the kink (111) of described finger catcher (110) has the inclined-plane (113) that 45 degree tilt.
5. claw hook type fishing socket as claimed in claim 1, it is characterized in that, the top of described top connection (101) comprises gable top (104) and is connected in the cylindrical neck portion at top, the bottom of described top connection (101) is for having externally threaded cylinder-like structure, and the top of cylindrical shell (102) has internal thread, the internal thread on the external screw thread of top connection (101) bottom and cylindrical shell (102) top is threaded connection, so that top connection (101) is nested in holding in cavity of described cylindrical shell (102) top.
6. claw hook type fishing socket as claimed in claim 1, is characterized in that, described top connection (101) bottom is provided with the upper flow orifice (105) of a plurality of perforations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320393168 CN203362093U (en) | 2013-07-03 | 2013-07-03 | Claw hook type overshot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320393168 CN203362093U (en) | 2013-07-03 | 2013-07-03 | Claw hook type overshot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203362093U true CN203362093U (en) | 2013-12-25 |
Family
ID=49809879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320393168 Expired - Fee Related CN203362093U (en) | 2013-07-03 | 2013-07-03 | Claw hook type overshot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203362093U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018798A (en) * | 2014-06-04 | 2014-09-03 | 中国海洋石油总公司 | Pipe interior chip fishing claw for oil-gas well |
-
2013
- 2013-07-03 CN CN 201320393168 patent/CN203362093U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018798A (en) * | 2014-06-04 | 2014-09-03 | 中国海洋石油总公司 | Pipe interior chip fishing claw for oil-gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20160703 |