CN2835535Y - Wash-over fishing tool - Google Patents
Wash-over fishing tool Download PDFInfo
- Publication number
- CN2835535Y CN2835535Y CN 200520133876 CN200520133876U CN2835535Y CN 2835535 Y CN2835535 Y CN 2835535Y CN 200520133876 CN200520133876 CN 200520133876 CN 200520133876 U CN200520133876 U CN 200520133876U CN 2835535 Y CN2835535 Y CN 2835535Y
- Authority
- CN
- China
- Prior art keywords
- milling head
- fishing
- whipstock
- utility
- bailer grab
- 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
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to oil gas field branch well drilling, completion practice instrument, and particularly a kind of cover mills fishing tool.The utility model mainly is made up of top connection, fishing socket, crossover sub, bailer grab, milling head, top connection, fishing socket, crossover sub, milling head are fixedly connected sequentially together, there is local type conical bench milling head inside, bailer grab is the split ring of local taper, inwall has reverse pawl, and forms matched in clearance with milling head.The utility model is used by adopting milling head and bailer grab, realizes milling and salvaging and usefulness, has reduced the risk of whipstock fishing, has improved the success rate of the fishing of whipstock, and this instrument can also be as the usefulness of salvaging trouble of lost tool in hole simultaneously.
Description
Technical field
The utility model relates to oil gas field branch well drilling, completion practice instrument, and particularly a kind of cover mills fishing tool.
Background technology
Multilateral Wells elemental operation program is: brill, the completion of at first finishing main borehole; Be lowered to whipstock and carry out the casing sidetracking operation; Salvage whipstock; The branch well hole completion.In salvaging the whipstock process, can salvage the success or failure that whipstock is related to whole mouthful of well smoothly.At present, whipstock is salvaged the hook-types that adopt more and is salvaged mode, and because the complexity of underground work, make hook-type salvage and face very big risk, in case hook-type is salvaged failure, just can only adopt the method for milling whipstock, because the milling workload is big, the activity duration is long, complicated operation, feasibility is very poor again for this method.
Summary of the invention
The purpose of this utility model is to provide a kind of cover to mill fishing tool, reduces the fishing risk of whipstock, improves the success rate of the fishing of whipstock.
The utility model mainly is made up of top connection 1, fishing socket 2, crossover sub 3, bailer grab 4, milling head 5, top connection 1, fishing socket 2, crossover sub 3, milling head 5 are fixedly connected sequentially together, there is local type conical bench milling head 5 inside, bailer grab 4 is the split ring of local taper, inwall has reverse pawl, and forms matched in clearance with milling head 5.
The utility model is used by adopting milling head 5 and bailer grab 4, realizes milling and salvaging and usefulness, has reduced the risk of whipstock fishing, has improved the success rate of the fishing of whipstock.This instrument can also be as the usefulness of salvaging trouble of lost tool in hole simultaneously.
Description of drawings
Fig. 1 the utility model structural representation
Specific embodiments
Cover as described in Figure 1 mills fishing tool, mainly form by top connection 1, fishing socket 2, crossover sub 3, bailer grab 4, milling head 5, top connection 1, fishing socket 2, crossover sub 3, milling head 5 are fixedly connected sequentially together, there is local type conical bench milling head 5 inside, bailer grab 4 is the split ring of local taper, inwall has reverse pawl, and forms matched in clearance with milling head 5.
In addition, the weldering carbide alloy can also be applied in milling head of the present utility model 5 bottoms.
When the utility model during down to the whipstock tip position, slowly transfer and overlap and mill the whipstock urceolus, when coming downwards to certain distance, bailer grab 4 is strutted by whipstock, carry on this moment and salvage the pipe string, under the effect of whipstock bottom weight, bailer grab 4 need resile, by the reverse pawl of inwall whipstock is blocked, thereby whipstock is successfully salvaged.
Claims (2)
1, a kind of cover mills fishing tool, mainly form by top connection (1), fishing socket (2), crossover sub (3), bailer grab (4), milling head (5), top connection (1), fishing socket (2), crossover sub (3), milling head (5) are fixedly connected sequentially together, it is characterized in that: there is local type conical bench milling head (5) inside, bailer grab (4) is the split ring of local taper, inwall has reverse pawl, and forms matched in clearance with milling head (5).
2, cover according to claim 1 mills fishing tool, it is characterized in that: milling head (5) bottom is for applying the carbide alloy of weldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520133876 CN2835535Y (en) | 2005-11-10 | 2005-11-10 | Wash-over fishing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520133876 CN2835535Y (en) | 2005-11-10 | 2005-11-10 | Wash-over fishing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2835535Y true CN2835535Y (en) | 2006-11-08 |
Family
ID=37300191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520133876 Expired - Lifetime CN2835535Y (en) | 2005-11-10 | 2005-11-10 | Wash-over fishing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2835535Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619485A (en) * | 2012-04-11 | 2012-08-01 | 中国海洋石油总公司 | Building block type salvage process for sand prevention tubular columns |
-
2005
- 2005-11-10 CN CN 200520133876 patent/CN2835535Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619485A (en) * | 2012-04-11 | 2012-08-01 | 中国海洋石油总公司 | Building block type salvage process for sand prevention tubular columns |
| CN102619485B (en) * | 2012-04-11 | 2014-09-10 | 中国海洋石油总公司 | Building block type salvage process for sand prevention tubular columns |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102305022B (en) | Salvage-type casing pipe drilling tool for drilling | |
| CN101298830A (en) | Vertical shaft soft rock special drill construction technique | |
| CN101413384A (en) | Method for sealing branch well window by using metal expansion pipe | |
| CN104847263A (en) | Coal bed methane far-end butt joint horizontal well drilling method | |
| CN2835535Y (en) | Wash-over fishing tool | |
| CN104912480A (en) | Drilling and completion method for coal bed gas near-end butt-joint horizontal well | |
| CN202249879U (en) | Double-layer sleeve windowing whipstock | |
| CN102587840B (en) | Hard formation casing windowing drill bit | |
| CN2586812Y (en) | Continuous sand flushing tool | |
| CN109854203B (en) | Windowing sidetracking plugging device and method for branch well | |
| CN200982157Y (en) | Quick production-resuming device for deep well litter of small well hole | |
| CN113931591B (en) | Top-recyclable whipstock and application method thereof | |
| CN202391345U (en) | Recyclable well drilling and well completion whipstock for oil drilling | |
| CN101173607B (en) | Disjointing controllable multi-layer fracturing tubular pile device of sandblaster and method for controlling disjointing | |
| CN210217679U (en) | Small well bore sleeve milling, making and buckling, fishing and well repairing tool | |
| CN2713125Y (en) | Fishing and milling tool | |
| CN203685092U (en) | Continuous milling device | |
| CN217897797U (en) | Four-level branch well tool system | |
| CN2679349Y (en) | Oblique recovering and fishing tool for branch hole | |
| CN2811549Y (en) | Downhole milling and drilling tools | |
| CN2668821Y (en) | Self-positioning recoverable oblique device | |
| CN201148838Y (en) | Drill head for branch wellbore reentrance | |
| CN104141467A (en) | Tool special for fishing combination operation on tail pipe in coal-bed gas well and operation process by using tool | |
| CN2864078Y (en) | Isolating device for location of sub-well oblique machine | |
| CN2219957Y (en) | Hanging device for whipstock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee after: Western Drilling Kelamayi Drilling Technology Institute Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20081212 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20061108 |
|
| EXPY | Termination of patent right or utility model |