CN203939476U - Downhole falling object catch sleeve - Google Patents
Downhole falling object catch sleeve Download PDFInfo
- Publication number
- CN203939476U CN203939476U CN201420286950.0U CN201420286950U CN203939476U CN 203939476 U CN203939476 U CN 203939476U CN 201420286950 U CN201420286950 U CN 201420286950U CN 203939476 U CN203939476 U CN 203939476U
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- CN
- China
- Prior art keywords
- cylindrical shell
- falling object
- small falling
- external diameter
- top connection
- 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 a kind of downhole falling object catch sleeve, belongs to oilfield horizontal well workover treatment small falling object fishing tool technical field.Top connection, cylindrical shell, consist of, top connection is connected with cylindrical shell by screw thread, and cylindrical shell is provided with windows and window tongue, and cylinder inboard wall is welded with steel wire, and the lower end of cylindrical shell is the cylinder pawl that length does not wait, and the middle part of cylindrical shell has bar-shaped trough.The beneficial effects of the utility model are by utilizing the elastic characteristic of steel wire, guarantee that small falling object enters cylindrical shell, window small falling object is fixed in cylindrical shell, guarantee the small falling object the dragging for well that do not fall in lift pipe string process, easy to operate, improved salvaging efficiency, saved operating cost, cylinder pawl external diameter is greater than running string external diameter, can effectively avoid the complicated risk of down-hole accident.
Description
Technical field
The utility model relates to a kind of downhole falling object catch sleeve, belongs to oilfield horizontal well workover treatment small falling object fishing tool technical field.
Background technology
In horizontal well operation process, often there will be rig tool, bias-wearing-proof apparatus of pumping rod, packing element fragment to equal the strip of small volume, the smallclothes class junk of sheet, will cause major diameter instrument (drift size gauge tool, packer etc.) to be difficult to be lowered to, lower conventional instrument is difficult to realize and salvages, strong magnetic die for example, enable, by smallclothes absorption, at trip-out process extension, to touch casing wall and can again fall into well; The result of use of tackling all problems at once in straight well is pretty good, but success rate is very low in horizontal well.
The patent No. 02232113.6 discloses a kind of downhole fishing claw, it is comprised of top connection, fishing socket, the lower end of fishing socket 2-4 the thin-walled bailer grab that be threaded, on the inwall of bailer grab, be welded with steel wire or reinforcing bar, there is simple in structure, handling ease, with low cost, easy to operate, fishing success ratio advantages of higher, but in horizontal well, use and limited by well bore, fishing success ratio is low.
Summary of the invention
The purpose of this utility model be for overcome above-mentioned of the prior art horizontal well fish for small falling object operation easier large, salvage weak effect, the easy defect of bit freezing, a kind of high efficiency horizontal well small falling object fishing tool is provided.
The utility model is comprised of top connection, cylindrical shell, and top connection is connected with cylindrical shell by screw thread, and cylindrical shell is provided with windows and window tongue, and cylinder inboard wall is welded with steel wire, and the lower end of cylindrical shell is the cylinder pawl that length does not wait, and the middle part of cylindrical shell has bar-shaped trough.
The beneficial effects of the utility model are by utilizing the elastic characteristic of steel wire, guarantee that small falling object enters cylindrical shell, window small falling object is fixed in cylindrical shell, guarantee the small falling object the dragging for well that do not fall in lift pipe string process, easy to operate, improved salvaging efficiency, saved operating cost, cylinder pawl external diameter is greater than running string external diameter, can effectively avoid the complicated risk of down-hole accident.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
The specific embodiment
As shown in Figure 1, the utility model is comprised of top connection 1, cylindrical shell 2, and top connection 1 is connected with cylindrical shell 2 by screw thread, cylindrical shell 2 is provided with windows 4 and window tongue 5, cylindrical shell 2 inwalls are welded with steel wire 3, and the lower end of cylindrical shell 2 is the cylinder pawl 7 that length does not wait, and the middle part of cylindrical shell 2 has bar-shaped trough 6.
Described window 4, window tongue 5 is trapezoidal or triangle, be evenly distributed on cylindrical shell 2 inwalls.
Described window tongue 5 opening angles are 30 °-60 °.
Described cylinder pawl 7 is taper, and its external diameter is greater than the external diameter of its top cylindrical shell 2.
At horizontal well when small falling object is salvaged, top connection 1 of the present utility model is connected with top tubing string by screw thread, down to apart from junk top of fish 1-2 rice, turn on pump well-flushing, termination of pumping after the sand setting on top of fish top is cleaned, transfer tubing string pressurization, the cylinder pawl 7 that length does not wait very easily enters small falling object inside, small falling object under the effect of the pressure of the drill along cylindrical shell 2 lower ends cylinder pawl 7 inner chamber move, top-open window tongue 5, steel wire 3 enters cylindrical shell 2 inside, rotation tubing string 5-7 circle, make small falling object compacting under the elastic reaction of steel wire, the small falling object that does not enter steel wire is descending when lift pipe string enters pit shaft vertical section, by window tongue 5, stopped, therefore, the small falling object dragging for is firmly enclosed in cylindrical shell 2 inner chambers, during lift pipe string, can not fall in well, cylinder pawl 7 external diameters are greater than running string external diameter simultaneously, after being lowered to horizontal segment, can be close to casing wall, can effectively avoid bit freezing to cause the complicated risk of down-hole accident, thereby complete the object of salvaging small falling object, guaranteed salvaging efficiency.
Claims (4)
1. downhole falling object catch sleeve, by top connection (1), cylindrical shell (2), formed, it is characterized in that: top connection (1) is connected with cylindrical shell (2) by screw thread, cylindrical shell (2) is provided with windows (4) and window tongue (5), cylindrical shell (2) inwall is welded with steel wire (3), the lower end of cylindrical shell (2) is the cylinder pawl (7) that length does not wait, and the middle part of cylindrical shell (2) has bar-shaped trough (6).
2. downhole falling object catch sleeve according to claim 1, is characterized in that: described windowing (4), window tongue (5) are trapezoidal or triangle, are evenly distributed on cylindrical shell (2) inwall.
3. downhole falling object catch sleeve according to claim 1 and 2, is characterized in that: described window tongue (5) opening angle is 30 °-60 °.
4. downhole falling object catch sleeve according to claim 1 and 2, is characterized in that: described cylinder pawl (7) is taper, and its external diameter is greater than the external diameter of its top cylindrical shell (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286950.0U CN203939476U (en) | 2014-05-30 | 2014-05-30 | Downhole falling object catch sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286950.0U CN203939476U (en) | 2014-05-30 | 2014-05-30 | Downhole falling object catch sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203939476U true CN203939476U (en) | 2014-11-12 |
Family
ID=51858799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420286950.0U Expired - Fee Related CN203939476U (en) | 2014-05-30 | 2014-05-30 | Downhole falling object catch sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203939476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041256A (en) * | 2015-08-27 | 2015-11-11 | 淮北矿业（集团）勘探工程有限责任公司 | Device used for fishing objects falling in geological drill hole |
-
2014
- 2014-05-30 CN CN201420286950.0U patent/CN203939476U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041256A (en) * | 2015-08-27 | 2015-11-11 | 淮北矿业（集团）勘探工程有限责任公司 | Device used for fishing objects falling in geological drill hole |
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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: 20141112 Termination date: 20200530 |