CN201599001U - Washover fishing tool with large-range die collar - Google Patents
Washover fishing tool with large-range die collar Download PDFInfo
- Publication number
- CN201599001U CN201599001U CN2010200376638U CN201020037663U CN201599001U CN 201599001 U CN201599001 U CN 201599001U CN 2010200376638 U CN2010200376638 U CN 2010200376638U CN 201020037663 U CN201020037663 U CN 201020037663U CN 201599001 U CN201599001 U CN 201599001U
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- China
- Prior art keywords
- female coupling
- large scale
- coupling tap
- fish
- washover
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- Expired - Lifetime
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Abstract
The utility model discloses a washover fishing tool with a large-range die collar and relates to the technical field of manufacture of fishing tools of oil pipes in underground rework operation projects. The washover fishing tool adopts the way of completing washover, unfreezing and fishing once and designs the washover fishing tool with the large-range die collar, which is applicable to the oil pipes in corrosion deformation of low-pressure wells and comprises the large-range die collar, wherein the upper part of the large-range die collar is connected with a left-hand drill rod, a left-hand fishing thread is arranged in a cylinder body of the large-range die collar, and the lower part of the large-range die collar is connected with a washover shoe. The washover fishing tool has the characteristics of large fishing range and effects of reducing the washover difficulty of the oil pipes in the corrosion deformation and reducing the washover workload.
Description
Technical field: a kind of band cover of female coupling tap on a large scale mills fishing tool, is used for the salvaging of the gas well corrosion oil pipe that produces oil of oil gas field, relates to the fishing tool manufacturing technology field of oil pipe in the down-hole workover treatment engineering of petroleum and natural gas well.
Background technology: the oil gas well is after production after a while, because the downhole corrosion material is to the corrosion of production tube, be corroded fracture and fall into the down-hole of the meeting that has, cause the oil gas well can not ordinary production, therefore, need carry out workover treatment, to the effect that remove the oil pipe of the distortion that is corroded the oil gas well, change new oil pipe, so that keep the ordinary production of oil gas well; At present, in implementing the down-hole workover treatment, the operation of salvaging and trip out the distortion oil pipe from the down-hole is a bigger difficult problem, high gas rate well particularly, the tube corrosion fracture mainly occurs in the tubing string middle and upper part, owing to be producing well, no fluid column in the well, after being corroded and rupturing, tubing string can fall rapidly, because in the process that falls, oil pipe string is subjected to enormous impact, fragments into multistage usually once more and produce broken piece of some oil pipes and fragment, and, the broken piece of the oil pipe of fracture and oil pipe and fragment are in the same place by impact extruded mutually, even the oil pipe that the top fracture can occur is inserted between the bottom oil pipe and the borehole wall, form two sections oil pipes and are squeezed in the down-hole side by side, therefore the oil pipe that causes rupturing dislocation forms the generation of lock of tool drilling; In addition,, cause oil pipe fracture distortion serious because the oil pipe of fracture bump mutually in dropping process also can clash into the borehole wall, have in addition become pie, shapeless, so the shape of each oil pipe fracture and appearance and size are all inequality; Because the existence of these problems, make fracture oil pipe string card very dead of down-hole, near reasons such as the oil pipe fragment adding top of fish in the pit shaft make the back-off unfreezing fishing very difficult, and needing cover to mill unfreezing often could salvage; The way of prior art is that cover mills earlier, salvage back instrument down, drag in specifically comprising and drag for outward: in drag for be to use in vatman's tool insert in the oil pipe itself and tube inner wall interlock salvaged in oil pipe, vatman has the lance of dragging for class fishing tool and die nipple in conventional, because cover mill can not the alignment bending the oil pipe top of fish, so vatman's tool is gone into the fish difficulty in conventional, may damage instrument simultaneously, cause the down-hole complexity between top of fish and the sleeve pipe if use die nipple also may be inserted into, thus in drag for inapplicable; Drag for outward is to be enclosed within the oil pipe outside with outer vatman's tool itself and oil-pipe external wall interlock are salvaged outside oil pipe, conventional outer vatman has dipper class fishing tool and female coupling tap, the condition that is suitable for is that top of fish must be complete or be out of shape less, it is shorter that existing female coupling tap is salvaged reach, therefore, can only salvage the little fish of external diameter scope, salvage screw thread as the female coupling tap in the 177.8mm sleeve pipe and be no more than 350mm, its salvaging scope is two kinds of 76mm～95mm and 86mm～108mm, therefore, only be applicable to and salvage the oil pipe that top of fish is intact or the top of fish distortion is little, and it is irregular to corrode the top of fish of oil pipe usually, 73mm corrosion-deformation oil pipe top of fish maximum outside diameter as fracture can surpass 90～105mm usually, therefore, in order to salvage larger-diameter fish, guarantee to salvage successfully, it is regular earlier top of fish to be rested and reorganized, and therefore will increase cover and mill workload and task difficulty; In addition, the cover miller skill of taking at present also might further be destroyed top of fish, the oil pipe chip, the fragment that form cause bit freezing easily or increase the weight of bit freezing, the down-hole situation is further worsened, strengthen and salvage difficulty, even can't salvage, particularly subnormal pressure oil gas well just can not be set up circulation when these situations take place.
Summary of the invention: the purpose of this utility model is the problem at present salvaging corrosion-deformation oil pipe cover mills, unfreezing and salvaging process exist, adopt that cover mills, unfreezing and salvaging once finish mode, designed a kind of band that is applicable to low pressure well corrosion-deformation oil pipe on a large scale the cover of female coupling tap mill fishing tool.
The utility model is achieved in that the utility model comprises female coupling tap and milling shoe, it is characterized in that: described female coupling tap is made of female coupling tap 2 on a large scale, left-handed drill rod thread 1 jointed rod on female coupling tap 2 tops on a large scale, female coupling tap 1 cylinder lumen is provided with left-handed salvaging screw thread 3 on a large scale, and the synchronous screw thread 4 of the outer left-handed twin-stage of female coupling tap 2 bottoms is threaded synchronously with the interior left-handed twin-stage of milling shoe 5 on a large scale;
On the bottom surface of described milling shoe 5 and inner headed face, cutting teeth 6 is arranged;
The bottom of described milling shoe 5 is the structure of round speaker shape;
During use, female coupling tap 2 is connected with milling shoe 5 on a large scale earlier, the upper end of female coupling tap 2 is connected with left-hand screw drill pipe on a large scale, G.I.H after connection is finished, when milling shoe 5 touches corrosion-deformation oil pipe top of fish, because milling shoe 5 bottom surfaces and inner headed face are provided with cutting teeth 6, therefore, can overlap the deformation place of corrosion oil pipe top of fish and mill integer, progressively enter milling shoe 5 then, then, the top of fish of corrosion oil pipe enters female coupling tap 2 on a large scale by milling shoe 5 again, because female coupling tap 2 cylinder lumens are provided with left-handed salvaging screw thread 3 on a large scale, and the salvaging scope is bigger, so, as long as the external diameter of corrosion oil pipe top of fish is no more than the salvaging scope, just the energy engagement with the fish is realized unfreezing fishing; After top of fish enters on a large scale female coupling tap 2, continue to keep 10～20KN the pressure of the drill, because the left-handed salvaging screw thread 3 of female coupling tap 1 inner chamber setting on a large scale is that lower diameter is big, upper diameter is little, so, top of fish can enter into suitable salvaging position soon, behind left-handed salvaging screw thread 3 wedging top of fish outer walls, makes top of fish outer wall and progressively interlock realization thread making salvaging of female coupling tap 2 on a large scale.
Advantage of the present utility model with beneficial effect is: the female coupling tap on a large scale of design is connected use with milling shoe, can play under the effect that the pressure of the drill and anticlockwise drilling tool are arranged earlier Side outside the top of fish of the oil pipe of corrosion-deformation overlapped and mill shaping, revise the top of fish finish then and can enter smoothly on a large scale in the female coupling tap, finish unfreezing fishing the corrosion-deformation oil pipe; Simultaneously, because diameter of a circle is bigger in the female coupling tap on a large scale, it is also corresponding bigger to salvage opening, therefore the salvaging scope is also big, the opening of large-size can effectively reduce cover and mill difficulty and cover mills workload, therefore, can be suitable for the salvaging of the corrosion-deformation oil pipe of more different top of fish shape and appearance and size, the cover that is specially adapted to the corrosion-deformation oil pipe mills unfreezing fishing.
Description of drawings:
Fig. 1 is that partial cutaway of the present utility model is shown assembling assumption diagram.
Below in conjunction with accompanying drawing the utility model is further specified: the utility model comprises female coupling tap and milling shoe, female coupling tap is made of female coupling tap 2 on a large scale, left-handed drill rod thread 1 jointed rod on female coupling tap 2 tops on a large scale, female coupling tap 1 cylinder lumen is provided with left-handed salvaging screw thread 3 on a large scale, the synchronous screw thread 4 of the outer left-handed twin-stage of female coupling tap 2 bottoms is threaded synchronously with the interior left-handed twin-stage of milling shoe 5 on a large scale, on the bottom surface of milling shoe 5 and inner headed face cutting teeth 6 is arranged, the bottom of milling shoe 5 is the structure of round speaker shape;
During use, female coupling tap 2 is threaded with the interior left-handed twin-stage that milling shoe 5 upper ends are provided with synchronously by the synchronous screw thread 4 of the outer left-handed twin-stage of lower end on a large scale earlier, the left-handed drill rod thread 1 in the upper end of female coupling tap 2 is connected with left-hand screw drill pipe on a large scale, after finishing, connection will manage the string G.I.H, when milling shoe 5 touches corrosion-deformation oil pipe top of fish, left-hand rotation also applies 10～20KN the pressure of the drill, the pressure of the drill and moment of torsion are delivered to female coupling tap 2 and milling shoe 5 on a large scale, because milling shoe 5 bottom surfaces and inner headed face are provided with cutting teeth 6, therefore, milling shoe 5 can overlap the deformation place of the corrosion oil pipe top of fish that can not enter milling shoe 5 and mill integer, make it progressively enter milling shoe 5, because the internal diameter of milling shoe 5 is less than the internal diameter of the big end of left-handed salvaging screw thread 3 opening diameters, so, corrosion oil pipe top of fish is easy to just can enter female coupling tap 2 on a large scale after by milling shoe 5, because the salvaging scope of female coupling tap 2 is big on a large scale, and because female coupling tap 1 cylinder lumen is provided with left-handed salvaging screw thread 3 on a large scale, so, as long as the external diameter of corrosion oil pipe top of fish is no more than the salvaging scope, just the energy engagement with the fish is realized unfreezing fishing; After top of fish enters on a large scale female coupling tap 2, continue to keep 10～20KN the pressure of the drill, drilling tool turns left, because the left-handed salvaging screw thread 3 of female coupling tap 1 inner chamber setting on a large scale is that lower diameter is big, upper diameter is little, so, top of fish can enter into suitable salvaging position soon, behind left-handed salvaging screw thread 3 wedging top of fish outer walls, just can implement thread making to fish, top of fish outer wall and female coupling tap 2 on a large scale progressively are interlocked realize thread making to be salvaged, salvage successfully and carry drilling tool on the back, direct trip-out just can be taken out and do not dragged for the oil pipe that obtains if the drill string suspending weight increases that fish blocks, the drill string that turns left if fish is blocked, because be that right-handed thread connects between the oil pipe, the left-hand rotation drill string just can be opened by the card portion oil pipe, trips out drilling tool and can take out and drag for the oil pipe that obtains.
Embodiment 1
At internal diameter is that 157mm, external diameter are that the salvaging diameter is the corrosion-deformation oil pipe of 73mm in the 177.8mm sleeve pipe:
The external diameter of the female coupling tap on a large scale 2 that adopts is 150mm, the tapering of the left-handed salvaging screw thread 3 in the female coupling tap 2 is 1: 8 on a large scale, salvage screw thread maximum inner diameter 115mm, salvage reach 440mm, G.I.H can be salvaged the corrosion-deformation oil pipe that the top of fish external diameter is 60mm～115mm; The length of milling shoe 5 is 160mm, and external diameter is 150mm, and internal diameter is 110mm; Will be on a large scale during use female coupling tap 2 bottoms and milling shoe 5 link together, female coupling tap 2 tops are connected with left-hand screw drill pipe and G.I.H on a large scale then, the contact top of fish, start drilling tool, left-handed and transfer drill string simultaneously top of fish is applied the pressure of the drill 10～20KN, behind the contact top of fish, moment of torsion is passed to milling shoe 5 by female coupling tap 2 on a large scale, the 6 pairs of tops of fish of cutting teeth that are arranged on the milling shoe 5 bottom round speaker shape and structures carry out the milling finishing, because the internal diameter of milling shoe 5 is less than the internal diameter of the big end of left-handed salvaging screw thread 3 opening diameters, so, top of fish is through the milling finishing of milling shoe 5, be easy to along the lower end of left-handed salvaging screw thread 3 after passing milling shoe 5 then, and enter on a large scale in the female coupling tap 2; Continue to keep the pressure of the drill, screw thread 3 is salvaged in the left-hand rotation that is provided with will wedging top of fish outer wall and carry out thread making, top of fish and female coupling tap 2 on a large scale progressively are interlocked, drill string is carried in examination then, continue if suspending weight does not change cover mill 200mm～400mm can on carry drill string, if suspending weight increases, and fish is not stuck in the down-hole, just can directly pull out of hole, and finishes the work of thread making fish up, if fish is stuck in the down-hole, just need to continue left-handed drilling tool, open the fish that is stuck in the down-hole, pull out of hole then, the fish of pulling out open is realized the work that back-off is salvaged.
Embodiment 2
At internal diameter is that 124.3mm, external diameter are that the salvaging diameter is the corrosion-deformation oil pipe of 60.3mm in the 139.7mm sleeve pipe:
The external diameter of the female coupling tap on a large scale 2 that adopts is 118mm, the tapering of the left-handed salvaging screw thread 3 in the female coupling tap 2 is 1: 8 on a large scale, salvage screw thread maximum inner diameter 85mm, salvage reach 300mm, G.I.H can be salvaged the corrosion-deformation oil pipe that the top of fish external diameter is 48mm～85mm; Milling shoe 2 long 140mm, external diameter 118mm, internal diameter 80mm; Will be on a large scale during use female coupling tap 2 bottoms and milling shoe 5 link together, female coupling tap 2 tops are connected with left-hand screw drill pipe on a large scale then, and G.I.H, the contact top of fish, rotate drilling tool left, and transfer drill string simultaneously top of fish is applied the pressure of the drill 10～20KN, behind the contact top of fish, moment of torsion is passed to milling shoe 5 by female coupling tap 2 on a large scale, the mill teeth of milling shoe 5 carries out the milling finishing to top of fish, because the minimum diameter of milling shoe 5 is littler than left-handed salvaging screw thread 3 maximum inner diameters, so top of fish is through milling shoe milling finishing, pass milling shoe 5 then, in being easy to enter on a large scale female coupling tap 1 along left-handed salvaging screw thread 3, continue to keep the pressure of the drill, make the outer wall that turns left to salvage screw thread 3 wedging tops of fish carry out thread making, and top of fish and female coupling tap on a large scale progressively are interlocked, sting and after, drill string is carried in examination, continue if suspending weight does not change cover mill 200mm～400mm can on carry drill string, if suspending weight increases, and fish is not stuck in the down-hole, just can directly pull out of hole, pull fish out, finish the thread making salvage, if fish is stuck in the down-hole, then continue to turn left to open by the card fish, the fish that pulls out of hole and just can pull out open, the realization back-off is salvaged.
Claims (3)
1. one kind is milled fishing tool with the cover of female coupling tap on a large scale, comprise female coupling tap and milling shoe, it is characterized in that: described female coupling tap is made of female coupling tap on a large scale, left-handed drill rod thread (1) jointed rod on female coupling tap top on a large scale, the female coupling tap cylinder lumen is provided with left-handed salvaging screw thread on a large scale, and the synchronous screw thread of outer left-handed twin-stage of female coupling tap bottom is threaded synchronously with the interior left-handed twin-stage of milling shoe on a large scale.
2. the band according to claim 1 cover of female coupling tap on a large scale mills fishing tool, it is characterized in that: on the bottom surface of described milling shoe and inner headed face cutting teeth is arranged.
3. the band according to claim 1 cover of female coupling tap on a large scale mills fishing tool, it is characterized in that: the bottom of described milling shoe is the structure of round speaker shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200376638U CN201599001U (en) | 2010-01-12 | 2010-01-12 | Washover fishing tool with large-range die collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200376638U CN201599001U (en) | 2010-01-12 | 2010-01-12 | Washover fishing tool with large-range die collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201599001U true CN201599001U (en) | 2010-10-06 |
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ID=42810055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200376638U Expired - Lifetime CN201599001U (en) | 2010-01-12 | 2010-01-12 | Washover fishing tool with large-range die collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201599001U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966326A (en) * | 2012-11-16 | 2013-03-13 | 沈阳北方重矿机械有限公司 | Profiled salvage drill bit |
| CN106869849A (en) * | 2017-02-21 | 2017-06-20 | 中国石油集团渤海钻探工程有限公司 | Set milling fishing integrated tool and its fishing method |
-
2010
- 2010-01-12 CN CN2010200376638U patent/CN201599001U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966326A (en) * | 2012-11-16 | 2013-03-13 | 沈阳北方重矿机械有限公司 | Profiled salvage drill bit |
| CN106869849A (en) * | 2017-02-21 | 2017-06-20 | 中国石油集团渤海钻探工程有限公司 | Set milling fishing integrated tool and its fishing method |
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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: 20101006 |