CN203515431U - Withdrawable fishing spear - Google Patents
Withdrawable fishing spear Download PDFInfo
- Publication number
- CN203515431U CN203515431U CN201320730944.5U CN201320730944U CN203515431U CN 203515431 U CN203515431 U CN 203515431U CN 201320730944 U CN201320730944 U CN 201320730944U CN 203515431 U CN203515431 U CN 203515431U
- Authority
- CN
- China
- Prior art keywords
- slips
- mandrel
- slip
- track cover
- withdrawable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 235000017771 Acacia greggii Nutrition 0.000 claims description 5
- 241000372389 Anigozanthos humilis Species 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 claims description 5
- 241000282326 Felis catus Species 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract 1
- 241000251468 Actinopterygii Species 0.000 description 21
- 238000005553 drilling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Images
Landscapes
- Fishing Rods (AREA)
Abstract
The utility model relates to an oil field well workover tool, and particularly relates to a withdrawable fishing spear. The withdrawable fishing spear is a tool which is used for fishing from inner bores of falling matter cavities and can be used for fishing and reversing falling matters such as oil pipes, drill rods and casing pipes with different sizes and having cylindrical top cavities. When the falling matter is engaged and cannot be fished out, the withdrawable fishing spear can be withdrawn from the falling matter and is lifted to the ground. The withdrawable fishing spear comprises an upper connector, wherein the inner bore of the upper connector is connected to a mandrel, the mandrel is sleeved with a cylindrical slip, slip inserts are arranged on the outer surface of the front end of the slip, multiple slit grooves are formed in the front end of the slip along the periphery so as to form multiple strip jaws, the front end of the mandrel is provided with a cone, and sloping surfaces enabling the strip jaws to expand outside are formed on the surface of the matching part of the front end of the slip and the mandrel along the periphery; the outer surface of the lower end of the upper connector is connected to a track sleeve, the lower end of the track sleeve is connected to the upper end of the slip, an L-shaped notch is formed in the surface of the track sleeve, and a limiting dowel is arranged in the L-shaped notch; interval and raised alloy welding joints are formed on the end surface of the lower end of the track sleeve.
Description
technical field
The utility model relates to a kind of oil well instrument, i.e. releasing spear.Releasing spear is that (fish refers to the junk of down-hole from fish, refer in particular to and stay drilling tool, oil pipe, drilling rod and the sleeve pipe etc. in well because of accident) a kind of instrument that chamber endoporus is salvaged can be that columniform fish is salvaged, back-off operation to top of fish inner chambers such as the oil pipe of different size, drilling rod and sleeve pipes; In the time of can not pulling out when engaging fish, this product can exit fish, carries go back to ground.
Background technology
In the prior art, fishing spear is conventional workover tool.It comprises top connection, top connection endoporus is connected with mandrel, tubular slip sleeve is on mandrel, slips front end external surface has slip insert, slips front end edge circumference is processed with a plurality of slots, form a plurality of strip cat's paws, mandrel front end is cone, and slips front end and surface, mandrel fitting face place have and make inclined-plane swollen outside strip cat's paw along circumference.Its shortcoming is when fish is overweight or back-off is not opened, and cannot need to discharge fish, causes new obstruction.
Utility model content
The purpose of this utility model is for above-mentioned deficiency, to provide a kind of to drag for, can exit fish, and releasing spear simple and reasonable for structure.
Technical solution of the present utility model is: releasing spear comprises top connection, top connection endoporus is connected with mandrel, tubular slip sleeve is on mandrel, slips front end external surface has slip insert, slips front end edge circumference is processed with a plurality of slots, form a plurality of strip cat's paws, mandrel front end is cone, and slips front end and surface, mandrel fitting face place have and make inclined-plane swollen outside strip cat's paw along circumference.Top connection lower end external surface is connected with track cover, and track cover lower end is connected with slips upper end, and there is L-type notch on track cover surface, limited location pin in L-type notch; The alloy solder joint that has interval, projection on track cover lower end surface.
In such scheme, there is the block body inserting for slips slot on slips front end and surface, mandrel fitting face place along circumference.Or there is spacer ring between top connection and track cover.Or there is the sheath that covers L-type notch on track cover surface.Or track cover lower end and slips upper end clasp joint, and track overlap with slips between by a plurality of steel balls, be connected, steel ball has holding screw by pore area.
The utility model has the advantages that: increase track nested structure, realize fishing spear along the transposition of L-type track, can drag for, can exit fish, and simple in structure, reasonable in design, meet on-the-spot use.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.Above or following description, be the specific embodiment of the present utility model, various not illustrating is construed as limiting flesh and blood of the present utility model.
Accompanying drawing explanation
Fig. 1 is the utility model structure diagram.
The structure diagram of Fig. 2 track cover four direction.
The specific embodiment
Referring to Fig. 1,2, component title is as follows: top connection 1, mandrel 2, slips 3, slip insert 4, slot 5, strip cat's paw 6, inclined-plane 7, track cover 8, position-limitting pin 9, alloy solder joint 10, block body 11, spacer ring 12, sheath 13, steel ball 14, holding screw 15, L-type notch 16.
Referring to Fig. 1, releasing spear comprises top connection 1, and top connection 1 endoporus is connected with mandrel 2, and tubular slips 3 is enclosed within on mandrel 2, can slide up and down.Slips 3 front end external surfaces have slip insert 4, and slips 3 front end edge circumference are processed with a plurality of slots 5, form a plurality of strip cat's paws 6, can realize elastic deformation.Mandrel 2 front ends are cone, for the top of fish inner chambers such as oil pipe, drilling rod and sleeve pipe that insert different size, are columniform fish.Slips 3 front ends and mandrel 2 surfaces, fitting face place have and make the outer swollen inclined-plane 7 of strip cat's paw 6 along circumference.Top connection 1 lower end external surface is connected with track cover 8, track overlaps 8 lower ends and is connected with slips 3 upper ends, track overlaps 8 surfaces has L-type notch 16(to see Fig. 2), vertically and laterally and the groove connecting, the interior limited location pin 9 of L-type notch 16, realizes track cover 8 and moves up and down in L-type notch 16 vertical slots along top connection 1, lateral rotation, form track and overlap 8 movement locus, therefore claim track cover 8.Track overlaps four alloy solder joints 10 that have interval, projection on 8 lower end surfaces, increases the frictional force between track cover 8 and fish while being convenient to back-off.
There is the block body 11 inserting for slips slot 5 on slips 3 front ends and mandrel 2 surfaces, fitting face place along circumference, with transmitting torque to slips 3.
Between top connection 1 and track cover 8, there is spacer ring 12, to adjust the gap of track cover 8 and top connection 1.
Track overlaps 8 surfaces the sheath 13 that covers L-type notch 16.
Referring to Fig. 2, L-type notch 16(groove axial and that laterally also connect) can make top connection 1 move up and down along notch by position-limitting pin 9, left or right moves afterwards.In Fig. 2, be left-hand thread returnable fishing spear track cover 8, the L direction of the track of right-hand thread and the track of left-hand thread is just in time axially symmetrical.
Operating principle: top connection 1 is connected with tubing string, when slip insert 4 enters fish inner chamber, upper lifting pipe post, slips 3 inner conical surfaces contact with mandrel 2 conical surfaces 7, make its distending, promptly after fish, realize salvaging, back-off.When fish is overweight or back-off does not open need release fish, transfer tubing string, after making track overlap 8 end face alloy solder joints 10 to contact with fish upper surface, the direction that links closely is rotated tubing string 60 degree, position-limitting pin 9 is entered in L-type track translot, upper lifting pipe post, now slip insert 4 is retracted, mandrel 2 can not produce relative motion with slips 3, can discharge fish.
As found, fish tubing string is stuck, and the method that can not adopt hard draw firmly to drag can only consider to return instrument.Fishing spear can be joined many cover slips, meets different fish needs.
Claims (5)
1. a releasing spear, comprise top connection (1), top connection (1) endoporus is connected with mandrel (2), tubular slips (3) is enclosed within on mandrel (2), slips (3) front end external surface has slip insert (4), slips (3) front end edge circumference is processed with a plurality of slots (5), form a plurality of strip cat's paws (6), mandrel (2) front end is cone, slips (3) front end and surface, mandrel (2) fitting face place have and make inclined-plane (7) swollen outside strip cat's paw (6) along circumference, it is characterized in that top connection (1) lower end external surface is connected with track cover (8), track cover (8) lower end is connected with slips (3) upper end, there is L-type notch (16) on track cover (8) surface, the interior limited location pin of L-type notch (16) (9), the alloy solder joint (10) that has interval, projection on track cover (8) lower end surface.
2. according to releasing spear claimed in claim 1, it is characterized in that there is the block body (11) inserting for slips slot (5) on slips (3) front end and surface, mandrel (2) fitting face place along circumference.
3. according to the releasing spear described in claim 1 or 2, it is characterized in that there is spacer ring (12) between top connection (1) and track cover (8).
4. according to releasing spear claimed in claim 3, it is characterized in that there is the sheath (13) that covers L-type notch (16) on track cover (8) surface.
5. according to releasing spear claimed in claim 4, it is characterized in that track cover (8) lower end and slips (3) upper end clasp joint, and between track cover (8) and slips (3), by a plurality of steel balls (14), be connected, steel ball (14) has holding screw (15) by pore area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320730944.5U CN203515431U (en) | 2013-11-19 | 2013-11-19 | Withdrawable fishing spear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320730944.5U CN203515431U (en) | 2013-11-19 | 2013-11-19 | Withdrawable fishing spear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203515431U true CN203515431U (en) | 2014-04-02 |
Family
ID=50374378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320730944.5U Expired - Lifetime CN203515431U (en) | 2013-11-19 | 2013-11-19 | Withdrawable fishing spear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203515431U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057739A (en) * | 2018-09-11 | 2018-12-21 | 西南石油大学 | A kind of pilot-operated type underground fishing tool |
-
2013
- 2013-11-19 CN CN201320730944.5U patent/CN203515431U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057739A (en) * | 2018-09-11 | 2018-12-21 | 西南石油大学 | A kind of pilot-operated type underground fishing tool |
| CN109057739B (en) * | 2018-09-11 | 2022-06-21 | 西南石油大学 | Hydraulic control type underground fishing tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |