CN204899829U - Cover mills back -off integration fishing device - Google Patents
Cover mills back -off integration fishing device Download PDFInfo
- Publication number
- CN204899829U CN204899829U CN201520559492.8U CN201520559492U CN204899829U CN 204899829 U CN204899829 U CN 204899829U CN 201520559492 U CN201520559492 U CN 201520559492U CN 204899829 U CN204899829 U CN 204899829U
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- CN
- China
- Prior art keywords
- coupling
- left hand
- utility
- model
- antitorque
- 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 - Fee Related
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Abstract
The utility model relates to an oil drilling and borehole operation salvage technical field, in particular to cover mills back -off integration fishing device. The device's top connection lower extreme wall connection coupling and through last antitorque nail fixing, coupling lower extreme adapter sleeve mills the tubular column and through antitorque nail fixing down, inlays hard alloy block on the milling pipe post, and the left hand fishing spear connection is at the top connection lower extreme, and the left hand fishing spear is arranged in inside coupling and the milling pipe post. The utility model discloses a casing string has simultaneously that the cover mills concurrently, back -off and salvage the function, reaches labour saving and time saving, shortens construction cycle's purpose, and the coupling has the effect of rightting concurrently, reduces the construction process, reduces the potential safety hazard. It often needs to bore twice down to have overcome current sticking of tool accident, wastes time and energy, and construction cycle is long, has the not enough of potential safety hazard.
Description
Technical field:
The utility model relates to oil drilling and underground work fishing operation field, particularly one cover milling back-off integration fishing device.
Background technology:
Lock of tool drilling is run in drilling process, when adopting left hand fishing spear or back taper still cannot salvage all tubing strings after breakouting pack of dynamite, first conventional fishing process is carry out cover milling unfreezing with milled sleeve, and then to bore for second time with dragging for lance or back taper carries out back-off salvaging down, accident settlement cycle that makes a trip twice is long, and down-hole accident hidden danger easily appears in midway; In addition tubing string is salvaged in general employing and is dragged for mode, and left hand fishing spear or back taper need before going into the well to weld outside and install sleeve arrangement additional and play centralizing function, and technique is loaded down with trivial details and to weld the potential safety hazard brought larger.
Utility model content:
The technical problems to be solved in the utility model is to provide a kind of cover milling back-off integration fishing device, the arrangement achieves a casing string have cover milling, back-off simultaneously concurrently and salvage function, reach time saving and energy saving, shorten the object of construction period, box cupling has centralizing function concurrently, reduce working procedure, reduce potential safety hazard.Overcoming under existing lock of tool drilling often needs and bore twice, waste time and energy, there is the deficiency of potential safety hazard in long construction period.
Technical solution adopted in the utility model is: a kind of cover milling back-off integration fishing device, comprises top connection; Top connection lower end outer wall connection coupling is also fixed by upper antitorque nail, box cupling lower end is connected milled sleeve and is fixed by lower antitorque nail, tungsten carbide button's block on milled sleeve, left hand fishing spear is connected to top connection lower end, and left hand fishing spear is placed in box cupling and milled sleeve is inner.
The beneficial effects of the utility model are: the utility model achieves a casing string and has cover milling, back-off simultaneously concurrently and salvage function, reaches time saving and energy saving, and shorten the object of construction period, box cupling has centralizing function concurrently, reduces working procedure, reduces potential safety hazard.
Accompanying drawing illustrates:
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention:
As shown in Figure 1, a kind of cover milling back-off integration fishing device, comprises top connection 1; Top connection 1 lower end outer wall connection coupling 3 is also fixed by upper antitorque nail 2, box cupling 3 lower end is connected milled sleeve 6 and is fixed by lower antitorque nail 5, tungsten carbide button's block on milled sleeve 6, left hand fishing spear 4 is connected to top connection 1 lower end, left hand fishing spear 4 is placed in box cupling 3 and milled sleeve 6 is inner, and milled sleeve 6 and box cupling 3 have centralizing function.
During use, drilling rod is connected to the utility model top connection 1 top, and during down to distance top of fish 5 ~ 10 meters, stop transferring tubing string, ground connects kelly bar and rotating disc, and turn on pump circulates, and rotates rotating disk, carries out cover milling operation by code requirement.Judge whether left hand fishing spear 4 enters fish inner chamber according to milled sleeve 6 length and suspending weight change, after left hand fishing spear 4 enters fish inner chamber, back-off, unfreezing code requirement carry out fishing routinely.Judge whether to drag for according to weight indicator instruction change and obtain fish and open fish, confirm to arrest fish, can venting pump pressure.When confirmation fish has been opened or unfreezing success, just can normally pull out of hole.
Be understandable that, above about specific descriptions of the present utility model, the technical scheme described by the utility model embodiment is only not limited to for illustration of the utility model, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within protection domain of the present utility model as long as meet.
Claims (1)
1. overlap a milling back-off integration fishing device, comprise top connection (1); It is characterized in that: top connection (1) lower end outer wall connection coupling (3) is also fixed by upper antitorque nail (2), box cupling (3) lower end is connected milled sleeve (6) and is fixed by lower antitorque nail (5), milled sleeve (6) upper tungsten carbide button block, left hand fishing spear (4) is connected to top connection (1) lower end, and left hand fishing spear (4) is placed in box cupling (3) and milled sleeve (6) is inner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520559492.8U CN204899829U (en) | 2015-07-30 | 2015-07-30 | Cover mills back -off integration fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520559492.8U CN204899829U (en) | 2015-07-30 | 2015-07-30 | Cover mills back -off integration fishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204899829U true CN204899829U (en) | 2015-12-23 |
Family
ID=54922015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520559492.8U Expired - Fee Related CN204899829U (en) | 2015-07-30 | 2015-07-30 | Cover mills back -off integration fishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204899829U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250639A (en) * | 2020-08-28 | 2021-08-13 | 中国海洋石油集团有限公司 | High-torsion-resistance back-off fishing pipe column and fishing method and application thereof |
-
2015
- 2015-07-30 CN CN201520559492.8U patent/CN204899829U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250639A (en) * | 2020-08-28 | 2021-08-13 | 中国海洋石油集团有限公司 | High-torsion-resistance back-off fishing pipe column and fishing method and application thereof |
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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: 20151223 Termination date: 20170730 |