CN204113176U - A kind of coal bed gas well fishing tool - Google Patents
A kind of coal bed gas well fishing tool Download PDFInfo
- Publication number
- CN204113176U CN204113176U CN201420564629.4U CN201420564629U CN204113176U CN 204113176 U CN204113176 U CN 204113176U CN 201420564629 U CN201420564629 U CN 201420564629U CN 204113176 U CN204113176 U CN 204113176U
- Authority
- CN
- China
- Prior art keywords
- coal bed
- bed gas
- gas well
- fishing rod
- recovery hook
- 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 discloses a kind of coal bed gas well fishing tool, be arranged in coal bed gas well, specifically comprise: the salvaging connecting rod of hollow, the crossover sub of hollow, the fishing rod of hollow and multiple recovery hook.Fishing rod is connected on salvaging connecting rod by crossover sub by the utility model, and the lower end of each recovery hook is fixed on fishing rod, and upper end is all upward oblique, opens to surrounding in barb-like; When salvaging nonmetal screen casing in well, as long as the inner chamber aiming at nonmetal screen casing inserts the utility model, the upper end of recovery hook can be easy to snap in the sieve aperture on nonmetal screen casing, hook nonmetal screen casing, and, barb-like recovery hook is easier to stab the inwall into nonmetal screen casing diagonally, and fix with it, make to carry in junk process upper, junk is not easy midway and drops, therefore, success rate when using the utility model to salvage nonmetal screen casing is higher, save the time of repeatedly salvaging, and it is simple to operation, therefore salvaging efficiency is also higher.
Description
Technical field
The utility model relates to coal bed gas well exploitation field, particularly a kind of coal bed gas well fishing tool.
Background technology
In the water pumping gas production process of coal bed gas well, because in coal seam, pressure alters a great deal, especially at net horizontal section, collapsing of the easy generation borehole wall, for this reason, usually in net horizontal section, transfer nonmetal screen casing, namely a kind of surrounding of polythene material is gathered the pipe fitting of sieve aperture, for supporting coal seam, but due in decentralization process, nonmetal screen casing usually midway comes off in well, affects the normal operation of coal bed gas well, therefore, special fishing tool is needed to carry out salvaging well.
At present, be directed to the situation often having junk in coal bed gas well, conventional fishing tool is slip-type sliding block trip spear, and it is made up of shaft, rail plate, slips and lock dog, and rail plate is positioned at the side of shaft, and the closer to the bottom direction of shaft, the distance of rail plate and shaft central axis is larger, and slips and lock dog are all arranged on rail plate, and slips can slide along rail plate, lock dog, for limiting slips, makes it not skid off rail plate.This fishing tool is generally used for the salvaging of rigid tubular object, first will enter junk inner chamber under it, slips is because gravity meeting own is along the rail plate downslide of tilting, with the downslide of slips, slips increases to the distance at shaft center, makes slips withstand junk inwall, afterwards, on carry slip-type sliding block trip spear, utilize the frictional force between slips and junk inwall that fishing junk is gone out well.
Realizing in process of the present utility model, inventor finds that prior art at least exists following problem:
When utilizing slip-type sliding block trip spear to salvage junk, what utilize is frictional force between slips and junk inwall, relatively be applicable to the object salvaging rigid tubular, but, when salvaging softer nonmetal screen casing, fishing tool is carried in process upper, junk rigidity is inadequate, its internal diameter will Flexible change, make to be difficult between slips and junk inwall clamp, slips easily skids on junk inwall, namely the frictional force between slips and junk inwall is large not, cause salvaging unsuccessfully, therefore, slip-type sliding block trip spear in the middle of prior art is when salvaging the junk of the rigidity deficiencies such as nonmetal screen casing, success rate is lower, affect construction speed.
Utility model content
In order to the problem that success rate when the slip-type sliding block trip spear solving prior art salvages softer nonmetal screen casing junk is lower, the utility model embodiment provides a kind of coal bed gas well fishing tool.Described technical scheme is as follows:
A kind of coal bed gas well fishing tool, be arranged in coal bed gas well, described coal bed gas well fishing tool comprises: the salvaging connecting rod of hollow, the crossover sub of hollow, the fishing rod of hollow and multiple recovery hook, described salvaging connecting rod, described crossover sub, described fishing rod is flexibly connected from top to bottom in turn, the lower end of described fishing rod is tiltedly sharp, the angle of inclination of described oblique point is 30-60 degree, the lower end of each described recovery hook is fixed on the external surface of the bottom of described fishing rod, the upper end of each described recovery hook is all upward oblique, multiple described recovery hook is evenly arranged along the periphery of the external surface of described fishing rod, and multiple described recovery hook is evenly set to multilayer along the axis of described fishing rod.
Further, the external diameter of described fishing rod is 50mm, and length is 1.2m.
Further, each described recovery hook is the reinforcing bar pipe nipple of long 25-30mm, diameter 19-22mm, and the upper end of described reinforcing bar pipe nipple is tip.
Particularly, the angle between each described reinforcing bar pipe nipple and the central axis of described fishing rod is 45 degree.
Further, the angle of inclination of the oblique point of the lower end of described fishing rod is 45 degree.
Alternatively, described salvaging connecting rod is drilling rod or the operation tubing of hollow.
Particularly, described salvaging connecting rod, described crossover sub, described fishing rod are threaded from top to bottom in turn, weld between described recovery hook with described fishing rod.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
Fishing rod is connected on salvaging connecting rod by crossover sub by the utility model, and the lower end of each recovery hook is fixed on fishing rod, and upper end is all upward oblique, and namely recovery hook opens to surrounding as barb-like on fishing rod, when salvaging the nonmetal screen casing fallen within coal bed gas well, as long as the inner chamber aiming at nonmetal screen casing inserts the utility model, the upper end of recovery hook can be easy to snap in the sieve aperture on nonmetal screen casing, hook nonmetal screen casing, recovery hook is fixed with it, and, barb-like recovery hook is easier to stab the inwall into nonmetal screen casing diagonally, and fix with it, make to carry in junk process upper, junk is not easy to drop from fishing tool, therefore, success rate when using the utility model to salvage nonmetal screen casing is higher, save the time of repeatedly salvaging, and it is simple to operation, make salvaging efficiency also higher,
And, salvage connecting rod, fishing rod and crossover sub and be hollow structure, when the inside of nonmetal screen casing is blocked by things such as silts, can cleaning fluid be passed into, nonmetal screen casing is rinsed, reduce the things such as silt to the impact of salvaging; The lower end of fishing rod is set to the oblique point of 30-60 degree, is conducive to the utility model and thrusts various well drilling detritus depths, down-hole smoothly and thoroughly salvage;
In addition, when junk in well is other soft object, during as the junk such as flexible pipe, rope, also the utility model can be used, when recovery hook touches above-mentioned soft junk, as long as can (advise deleting) and rotate the utility model, make it to be intertwined with this junk, just easily fishing junk can be gone out well, therefore, the utility model can be applicable to the salvaging of junk in multiple well, and success rate is higher.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the coal bed gas well fishing tool that the utility model embodiment provides;
Wherein: 1 salvages connecting rod, 2 crossover subs, 3 fishing rods, 31 is tiltedly sharp, 4 recovery hooks.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment one
The utility model embodiment provides a kind of coal bed gas well fishing tool, be arranged in coal bed gas well, described coal bed gas well fishing tool comprises: the salvaging connecting rod 1 of hollow, the crossover sub 2 of hollow, the fishing rod 3 of hollow and multiple recovery hook 4, described salvaging connecting rod 1, described crossover sub 2, described fishing rod 3 is flexibly connected from top to bottom in turn, the lower end of described fishing rod 3 is oblique point 31, the described oblique angle of inclination of sharp 31 is 30-60 degree, the lower end of each described recovery hook 4 is fixed on the external surface of the bottom of described fishing rod 3, the upper end of each described recovery hook 4 is all upward oblique, multiple described recovery hook 4 is evenly arranged along the periphery of the external surface of described fishing rod 3, and multiple described recovery hook 4 is evenly set to multilayer along the axis of described fishing rod 3.
Wherein, fishing rod 3 is connected on salvaging connecting rod 1 by crossover sub 2 by the utility model, multiple oblique recovery hook 4 is upward set in the bottom of fishing rod 3, recovery hook 4 opens to surrounding as barb-like on fishing rod 3, when salvaging the nonmetal screen casing fallen within coal bed gas well, as long as the inner chamber aiming at nonmetal screen casing inserts the utility model, the upper end of recovery hook 4 is just easy to snap in the sieve aperture on nonmetal screen casing, hook nonmetal screen casing, recovery hook 4 is fixed with it, and, barb-like recovery hook 4 is easier to stab the inwall into nonmetal screen casing diagonally, and fix with it, make to carry in junk process upper, junk is not easy to drop from fishing tool, therefore, success rate when using the utility model to salvage nonmetal screen casing is higher, save the time of repeatedly salvaging, and it is simple to operation, make salvaging efficiency also higher, salvage the structure that connecting rod 1, fishing rod 3 and crossover sub 2 are all set to hollow, therefore, when the inside of nonmetal screen casing is blocked by things such as silts, the utility model can pass into cleaning fluid, as a large amount of water, rinse in nonmetal screen casing, reduce the things such as silt to the impact of salvaging, the utility model by trying flat 9U Zheng, Fan tries the well onsite application such as U1, have received good result, salvaged several nonmetal screen casing, and fishing success ratio reach 100%,
Further, the external surface in the bottom of fishing rod 3 circumferentially same, evenly arrange four recovery hooks 4 for good, and the bottom of recovery hook 4 repeats the setting of this circumference of 3-6 layer vertically; So, when the junk in coal bed gas well is other soft object, during as the junk such as flexible pipe, rope, also the utility model can be used, when recovery hook 4 touches above-mentioned soft junk, as long as rotation the utility model, make it to be intertwined with this junk, just can easily be hooked and salvage well, therefore, the utility model is applicable to the salvaging of junk in multiple well, and fishing success ratio is higher;
In addition, the lower end of fishing rod 3 is set to oblique sharp 31 of 30-60 degree, not only be conducive to the inner chamber that the utility model thrusts junk smoothly, thus salvage, and in the way of salvaging junk, the various well drilling detritus of down-hole often block the passage in well, therefore, the setting of this oblique point 31 enables the utility model back down the well drilling detritus of obstruction smoothly, thus thoroughly salvages the depths of coal bed gas well, maintains the clean environment in coal bed gas well.
Embodiment two
The another embodiment of the utility model provides a kind of coal bed gas well fishing tool, be arranged in coal bed gas well, described coal bed gas well fishing tool comprises: the salvaging connecting rod 1 of hollow, the crossover sub 2 of hollow, the fishing rod 3 of hollow and multiple recovery hook 4, described salvaging connecting rod 1, described crossover sub 2, described fishing rod 3 is flexibly connected from top to bottom in turn, the lower end of described fishing rod 3 is oblique point 31, the described oblique angle of inclination of sharp 31 is 30-60 degree, the lower end of each described recovery hook 4 is fixed on the external surface of the bottom of described fishing rod 3, the upper end of each described recovery hook 4 is all upward oblique, multiple described recovery hook 4 is evenly arranged along the periphery of the external surface of described fishing rod 3, and multiple described recovery hook 4 is evenly set to multilayer along the axis of described fishing rod 3.
Further, the external diameter of described fishing rod 3 is 50mm, and length is 1.2m.
Wherein, the external diameter of fishing rod 3 is preferably 50mm, and length is preferably 1.2m, compares the salvaging being applicable to most coal bed gas well and uses; The external diameter of fishing rod 3 and length also can adjust according to actual conditions; In addition, fishing rod 3 also can be wherein one section that directly intercepts on the drilling rod of discarded hollow, multiple recovery hook 4 on its underpart is fixedly connected with again, upper end is flexibly connected with salvaging connecting rod 1 by crossover sub 2, form the utility model, its processing and manufacturing is simple, recycles discarded drilling rod and makes cost lower.
Further, each described recovery hook 4 is the reinforcing bar pipe nipple of long 25-30mm, diameter 19-22mm, and the upper end of described reinforcing bar pipe nipple is tip.
Wherein, recovery hook 4 can select discarded steel bar meter to form, as long as be that the reinforcing bar of 19-22mm cuts the reinforcing bar pipe nipple of growing into 25-30mm by discarded diameter, both make use of refuse, and has saved cost, and make simple and convenient, comparatively practical; The size of this reinforcing bar pipe nipple also suitably can change according to the needs of practical application.
Particularly, the angle between each described reinforcing bar pipe nipple and the central axis of described fishing rod 3 is 45 degree.The setting of this angle is beneficial to the easy of processing, and be beneficial to recovery hook 4 and can hook junk smoothly, and while hooking junk, decrease the flexural stress that junk applies the position that the lower end of recovery hook 4 is connected with fishing rod 3, recovery hook 4 is not easily fractureed in this position, therefore improves durability of the present utility model.
Further, described fishing rod 3 lower end oblique sharp 31 angle of inclination be 45 degree.The selection of this angle make the utility model push up wear the well drilling detritus of passage time, tiltedly point 31 can not push up because of too blunt and wear difficulty, also tiltedly point 31 will be caused to fracture because of too point, maintain simultaneously this tiltedly sharp 31 practicality and durability.
Alternatively, described salvaging connecting rod 1 is drilling rod or the operation tubing of hollow.Wherein, the utility model is the structure of axial hollow, is convenient to pass into cleaning fluid and rinses junk.
Particularly, described salvaging connecting rod 1, described crossover sub 2, described fishing rod 3 are threaded from top to bottom in turn, weld between described recovery hook 4 with described fishing rod 3.Wherein, crossover sub 2 salvages connecting rod 1 for being connected to by fishing rod 3, is threaded between three, is convenient to change.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. a coal bed gas well fishing tool, be arranged in coal bed gas well, it is characterized in that, described coal bed gas well fishing tool comprises: the salvaging connecting rod of hollow, the crossover sub of hollow, the fishing rod of hollow and multiple recovery hook, described salvaging connecting rod, described crossover sub, described fishing rod is flexibly connected from top to bottom in turn, the lower end of described fishing rod is tiltedly sharp, the angle of inclination of described oblique point is 30-60 degree, the lower end of each described recovery hook is fixed on the external surface of the bottom of described fishing rod, the upper end of each described recovery hook is all upward oblique, multiple described recovery hook is evenly arranged along the periphery of the external surface of described fishing rod, and multiple described recovery hook is evenly set to multilayer along the axis of described fishing rod.
2. coal bed gas well fishing tool according to claim 1, is characterized in that, the external diameter of described fishing rod is 50mm, and length is 1.2m.
3. coal bed gas well fishing tool according to claim 2, is characterized in that, each described recovery hook is the reinforcing bar pipe nipple of long 25-30mm, diameter 19-22mm, and the upper end of described reinforcing bar pipe nipple is tip.
4. coal bed gas well fishing tool according to claim 3, is characterized in that, the angle between each described reinforcing bar pipe nipple and the central axis of described fishing rod is 45 degree.
5. coal bed gas well fishing tool according to claim 1, is characterized in that, the angle of inclination of the oblique point of the lower end of described fishing rod is 45 degree.
6. coal bed gas well fishing tool according to claim 1, is characterized in that, described salvaging connecting rod is drilling rod or the operation tubing of hollow.
7. coal bed gas well fishing tool according to claim 1, is characterized in that, described salvaging connecting rod, described crossover sub, described fishing rod are threaded from top to bottom in turn, weld between described recovery hook with described fishing rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420564629.4U CN204113176U (en) | 2014-09-28 | 2014-09-28 | A kind of coal bed gas well fishing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420564629.4U CN204113176U (en) | 2014-09-28 | 2014-09-28 | A kind of coal bed gas well fishing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204113176U true CN204113176U (en) | 2015-01-21 |
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ID=52330500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420564629.4U Expired - Fee Related CN204113176U (en) | 2014-09-28 | 2014-09-28 | A kind of coal bed gas well fishing tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN204113176U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285543A (en) * | 2015-06-04 | 2017-01-04 | 中国石油天然气股份有限公司 | Packer fishing tool |
| CN106481298A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of spiral combination fisher |
| CN109915055A (en) * | 2019-04-22 | 2019-06-21 | 中国海洋石油集团有限公司 | A kind of grab skipping fishing rope device |
| CN110127002A (en) * | 2019-05-29 | 2019-08-16 | 上海海洋大学 | A kind of intelligent device salvaged coastal waters seabed and lose discarding netting gear |
-
2014
- 2014-09-28 CN CN201420564629.4U patent/CN204113176U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285543A (en) * | 2015-06-04 | 2017-01-04 | 中国石油天然气股份有限公司 | Packer fishing tool |
| CN106481298A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of spiral combination fisher |
| CN109915055A (en) * | 2019-04-22 | 2019-06-21 | 中国海洋石油集团有限公司 | A kind of grab skipping fishing rope device |
| CN110127002A (en) * | 2019-05-29 | 2019-08-16 | 上海海洋大学 | A kind of intelligent device salvaged coastal waters seabed and lose discarding netting gear |
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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: 20150121 |