CN204113167U - A kind of coal bed gas well drags for sand instrument - Google Patents
A kind of coal bed gas well drags for sand instrument Download PDFInfo
- Publication number
- CN204113167U CN204113167U CN201420546779.2U CN201420546779U CN204113167U CN 204113167 U CN204113167 U CN 204113167U CN 201420546779 U CN201420546779 U CN 201420546779U CN 204113167 U CN204113167 U CN 204113167U
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- sleeve pipe
- bed gas
- coal bed
- elastic metallic
- gas well
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Abstract
The utility model discloses a kind of coal bed gas well and drag for sand instrument, comprise: salvage connecting rod, crossover sub, elasticity Drain Resistance structure and sleeve pipe, salvage connecting rod, crossover sub, sleeve pipe is flexibly connected from top to bottom in turn, the diameter of sleeve pipe is the 50%-80% of coal bed gas well diameter, the lower end of sleeve pipe is tiltedly sharp, the angle of inclination of oblique point is 30-60 degree, elasticity Drain Resistance vibrational power flow at internal surface of sleeve pipe near lower end, elasticity Drain Resistance structure comprises many elastic metallic ropes, the length of every root elastic metallic rope is less than casing diameter, one end of every root elastic metallic rope is fixed on internal surface of sleeve pipe, and every root elastic metallic rope is all arranged with the central axis of sleeve pipe, many elastic metallic ropes are netted irregular cross-distribution.The utility model by and to arrange near lower end at internal surface of sleeve pipe be the elasticity Drain Resistance structure of netted irregular cross-distribution by many elastic metallic ropes, block is fallen in the drilling well can effectively salvaged in the well of coal bed gas cave, it is easy that the utility model salvages process operation, and the work period is short.
Description
Technical field
The utility model relates to coal-bed gas exploitation field, and particularly a kind of coal bed gas well drags for sand instrument.
Background technology
Current China coal bed gas horizontal well well type mostly is cave branch horizontal well, namely be jointly made up of mining cave well and drilling well engineering well, the cave well that during construction, first finishing drilling a bite is vertical, simultaneously at the general 200 meters of construction a bite engineering wells of distance cave well, engineering well is bending gradually to during ground downward-extension, until level crosses the bottom of cave well, be two wells and carry out far-end and " thread a needle ".Then in the well of cave, carry out operation, install mining equipment, drainage and step-down is resolved and is given vent to anger, and goes out along cave well array.
But in operation process, in the well of cave, usually remain the coal seam left in drilling process fall block or mud stone falls the well drilling detritus such as block, use traditional sand-bailing equipment, generally connect fishing oil pipe by suction pump, in suction pump, valve is set, but due to the restriction of valve and suction pump technique and size, fine particle can only be extracted out, fall more greatly block cannot pull out, have a strong impact on lower pump operation and follow-up mining, common method only carries out workover treatment, namely by the instrument lower going-into-wells such as drill bit, the granule landwaste being drilled to and can circulating repeatedly is ground by falling block, well head is taken out of again by sand-bailing equipment.
Realizing in process of the present utility model, inventor finds that prior art at least exists following problem:
Prior art is for the eliminating of well drilling detritus falling more greatly block, and process is comparatively loaded down with trivial details, and the cycle is longer, easily delays exploitation process; And the instruments such as drill bit repeatedly grind to bore and easily cause damage to well, even cause the accidents such as hole collapse.
Utility model content
Fall more greatly to solve prior art eliminating the problem that block process is loaded down with trivial details, easily well is caused to damage, the utility model embodiment provides a kind of coal bed gas well and drags for sand instrument.Described technical scheme is as follows:
A kind of coal bed gas well drags for sand instrument, be arranged in coal bed gas well, described coal bed gas well drags for sand instrument and comprises: salvage connecting rod, crossover sub, elasticity Drain Resistance structure and sleeve pipe, described salvaging connecting rod, described crossover sub, described sleeve pipe is flexibly connected from top to bottom in turn, the diameter of described sleeve pipe is the 50%-80% of described coal bed gas well diameter, the lower end of described sleeve pipe is tiltedly sharp, the angle of inclination of described oblique point is 30-60 degree, described elasticity Drain Resistance vibrational power flow at described internal surface of sleeve pipe near lower end, described elasticity Drain Resistance structure comprises many elastic metallic ropes, the length of every root elastic metallic rope is less than described casing diameter, one end of every root elastic metallic rope is fixed on described internal surface of sleeve pipe, and every root elastic metallic rope is all arranged with the central axis of described sleeve pipe, many described elastic metallic ropes are netted irregular cross-distribution.
As preferably, described elastic metallic rope is wire rope pipe nipple.
Further, described wire rope pipe nipple is the wire rope pipe nipple of 6*19-22.
As preferably, the length of described sleeve pipe is 1.5m, and diameter is 139.7mm, and the length of described wire rope pipe nipple is 5-8cm, and at a distance of 0.5-2cm between every two wire rope pipe nipples and the fixing end of described internal surface of sleeve pipe.
As preferably, the angle of inclination of described oblique point is 45 degree.
As preferably, described salvaging connecting rod is drilling rod or operation tubing.
As preferably, described salvaging connecting rod, described crossover sub, described sleeve pipe are threaded from top to bottom in turn.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is:
The utility model will be by salvaging connecting rod, crossover sub, sleeve pipe directly connects, and to arrange near lower end at internal surface of sleeve pipe be the elasticity Drain Resistance structure of netted irregular cross-distribution by many elastic metallic ropes, block is fallen more greatly for down-hole, as long as aim at block the utility model is vertically transferred, fall block and namely can wash netted elasticity Drain Resistance structure open, be squeezed in sleeve pipe, netted elasticity Drain Resistance structure can effectively prevent the well drilling detritus such as block from spilling, on carry the utility model to ground, sleeve pipe is unloaded from crossover sub, and pour out falling the well drilling detritus such as block in sleeve pipe, block is fallen in the drilling well can effectively salvaged in the well of coal bed gas cave, especially for bulk fall block salvage very convenient, and, the diameter of sleeve pipe is set to the 50%-80% of coal bed gas well diameter by the utility model, increase casing diameter, be conducive to down-hole various fall the salvaging of block deposit, and sleeve bottom is set to oblique point, be conducive to the utility model and thrust various well drilling detritus depths, down-hole smoothly and thoroughly salvage, it is easy that the utility model salvages process operation, and the work period is short, substantially increases operating efficiency, in addition, the utility model reduces probability well being caused to damage, and collapse risk in minimizing cave, coal seam, reduces reservoir damage.
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 that coal bed gas well that the utility model embodiment provides drags for sand instrument;
Fig. 2 is the structural representation that coal bed gas well that the another embodiment of the utility model provides drags for sand tool cross sections;
Wherein: 1 crossover sub, 2 sleeve pipes, 3 elastic metallic ropes, 4 salvage connecting rod.
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
As shown in Figure 1, also can see Fig. 2, the utility model embodiment provides a kind of coal bed gas well to drag for sand instrument, be arranged in coal bed gas well, described coal bed gas well drags for sand instrument and comprises: salvage connecting rod 4, crossover sub 1, elasticity Drain Resistance structure and sleeve pipe 2, described salvaging connecting rod 4, described crossover sub 1, described sleeve pipe 2 is flexibly connected from top to bottom in turn, the diameter of described sleeve pipe 2 is the 50%-80% of described coal bed gas well diameter, the lower end of described sleeve pipe 2 is tiltedly sharp, the angle of inclination of described oblique point is 30-60 degree, described elasticity Drain Resistance vibrational power flow at described sleeve pipe 2 inwall near lower end, described elasticity Drain Resistance structure comprises many elastic metallic ropes 3, the length of every root elastic metallic rope 3 is less than described sleeve pipe 2 diameter, one end of every root elastic metallic rope 3 is fixed on described sleeve pipe 2 inwall, and every root elastic metallic rope 3 is all arranged with the central axis of described sleeve pipe 2, many described elastic metallic ropes 3 are in netted irregular cross-distribution.
Wherein, by ordinary casing 2 lower end oblique cutting, sleeve pipe 2 lower end can be cut into oblique point, the angle of its most tip is generally 30-60 degree, so arranges, for down-hole have more fall block pile up time, sleeve pipe 2 lower end can be thrust among cushion block smoothly, is convenient to salvage; Pawn block from bottom through elastic metallic rope 3 time, elastic metallic rope 3 needs certain elasticity, and block can be passed through smoothly, pawn block when entering above elastic metallic rope 3, elastic metallic rope 3 needs to have certain hardness, can support falling block, prevents its lower leakage; Elastic metallic rope 3 is average to be arranged on sleeve pipe 2 inwall, and elastic metallic rope 3 is irregular intersects in length and breadth for each, forms crossing net, thus effectively prevent various different size fall fast lower leakage.
The utility model will be by salvaging connecting rod 4, crossover sub 1, sleeve pipe 2 directly connects, and arrange by the elasticity Drain Resistance structure of many elastic metallic ropes 3 in netted irregular cross-distribution at sleeve pipe 2 inwall near lower end, block is fallen more greatly for down-hole, as long as aim at block the utility model is vertically transferred, fall block and namely can wash netted elasticity Drain Resistance structure open, be squeezed in sleeve pipe 2, netted elasticity Drain Resistance structure can effectively prevent the well drilling detritus such as block from spilling, on carry the utility model to ground, sleeve pipe 2 is unloaded from crossover sub 1, and pour out falling the well drilling detritus such as block in sleeve pipe 2, block is fallen in the drilling well can effectively salvaged in the well of coal bed gas cave, especially for bulk fall block salvage very convenient, and the diameter of sleeve pipe 2 is set to the 50%-80% of coal bed gas well diameter by the utility model, relative and prior art, increase sleeve pipe 2 diameter, the sand setting space of dragging for sand sleeve pipe 2 is large, can the larger well drilling detritus of receiving volume, efficiency is salvaged in effective raising, reduces number of times of going into the well, and be set to oblique point by bottom sleeve pipe 2, be conducive to the utility model and thrust various well drilling detritus depths, down-hole smoothly and thoroughly salvage, it is easy that the utility model salvages process operation, and the work period is short, substantially increases production efficiency, in addition, the utility model reduces probability well being caused to damage, collapse risk in minimizing cave, coal seam, reduce reservoir damage, by well onsite application such as, Zheng 4 flat-16 flat-6 Zheng 4, have received good result, that effectively can salvage maximum gauge 5cm falls block, well workover time shorten 30%-50%.Observed by downhole imaging equipment, the borehole wall is without obviously collapsing.
Embodiment two
As shown in Figure 1, also can see Fig. 2, the utility model embodiment provides a kind of coal bed gas well to drag for sand instrument, be arranged in coal bed gas well, described coal bed gas well drags for sand instrument and comprises: salvage connecting rod 4, crossover sub 1, elasticity Drain Resistance structure and sleeve pipe 2, described salvaging connecting rod 4, described crossover sub 1, described sleeve pipe 2 is flexibly connected from top to bottom in turn, the diameter of described sleeve pipe 2 is the 50%-80% of described coal bed gas well diameter, the lower end of described sleeve pipe 2 is tiltedly sharp, the angle of inclination of described oblique point is 30-60 degree, described elasticity Drain Resistance vibrational power flow at described sleeve pipe 2 inwall near lower end, described elasticity Drain Resistance structure comprises many elastic metallic ropes 3, the length of every root elastic metallic rope 3 is less than described sleeve pipe 2 diameter, one end of every root elastic metallic rope 3 is fixed on described sleeve pipe 2 inwall, and every root elastic metallic rope 3 is all arranged with the central axis of described sleeve pipe 2, many described elastic metallic ropes 3 are in netted irregular cross-distribution.
As shown in Figure 1, also can see Fig. 2, as preferably, described elastic metallic rope 3 is wire rope pipe nipple.In the utility model embodiment, elastic metallic rope 3 can select wire rope pipe nipple, also can select other metallic cable, or plastic material also can, as long as possess certain elasticity and hardness, meet the requirements.
Further, described wire rope pipe nipple is the wire rope pipe nipple of 6*19-22.Wherein, the above-mentioned meaning that arranges is, clench stranded for 6 finer wires, form the steel wire that one is thicker, clench stranded for steel wire thicker for 19-22 stock again, namely form the wire rope pipe nipple that the utility model embodiment adopts, so can ensure that it possesses certain elasticity and hardness, meets the requirements.
As shown in Figure 1, as preferably, the length of described sleeve pipe 2 is 1.5m, and diameter is 139.7mm, and the length of described wire rope pipe nipple is 5-8cm, and at a distance of 0.5-2cm between every two wire rope pipe nipples and the fixing end of described sleeve pipe 2 inwall.Wherein, in actual applications, for cave well conventional on general building site, inventor adopts length to be 1.5m, and diameter is the sleeve pipe 2 of 139.7mm, and length is the wire rope pipe nipple of 5-8cm, and effect is best, and does not waste material; One end of every root wire rope pipe nipple is fixed on sleeve pipe 2 inwall, this end of every two wire rope pipe nipples, at a distance of 0.5-2cm, so arranges, final netted elasticity Drain Resistance structure can be made comparatively intensive, and it is inner to be looped around sleeve pipe 2, can better salvage falling block; Certainly, also can arrange flexibly according to actual conditions.
As shown in Figure 1, as preferably, the angle of inclination of described oblique point is 45 degree.Oblique point is preferably 45 degree, be convenient to insert pile up in block, be also convenient to processing.
As preferably, described salvaging connecting rod 4 is drilling rod or operation tubing.Salvage connecting rod 4 and can connect solid drilling rod, namely the utility model embodiment removes use suction pump from, can salvage underground falling blocks; In addition, when down-hole has liquid to need to extract out, salvaging connecting rod 4 also can be oil pipe, now, then oil pipe can be connected suction pump, be convenient to the extraction of liquid.
As preferably, described salvaging connecting rod 4, described crossover sub 1, described sleeve pipe 2 are threaded from top to bottom in turn.Be threaded the dismounting be convenient to each other, make in sleeve pipe 2 salvage toppling over of the materials such as block, be also convenient to replacing and the maintenance of each parts.
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 drags for sand instrument, be arranged in coal bed gas well, it is characterized in that, described coal bed gas well drags for sand instrument and comprises: salvage connecting rod, crossover sub, elasticity Drain Resistance structure and sleeve pipe, described salvaging connecting rod, described crossover sub, described sleeve pipe is flexibly connected from top to bottom in turn, the diameter of described sleeve pipe is the 50%-80% of described coal bed gas well diameter, the lower end of described sleeve pipe is tiltedly sharp, the angle of inclination of described oblique point is 30-60 degree, described elasticity Drain Resistance vibrational power flow at described internal surface of sleeve pipe near lower end, described elasticity Drain Resistance structure comprises many elastic metallic ropes, the length of every root elastic metallic rope is less than described casing diameter, one end of every root elastic metallic rope is fixed on described internal surface of sleeve pipe, and every root elastic metallic rope is all arranged with the central axis of described sleeve pipe, many described elastic metallic ropes are netted irregular cross-distribution.
2. coal bed gas well according to claim 1 drags for sand instrument, it is characterized in that, described elastic metallic rope is wire rope pipe nipple.
3. coal bed gas well according to claim 2 drags for sand instrument, it is characterized in that, described wire rope pipe nipple is the wire rope pipe nipple of 6*19-22.
4. coal bed gas well according to claim 3 drags for sand instrument, it is characterized in that, the length of described sleeve pipe is 1.5m, and diameter is 139.7mm, the length of described wire rope pipe nipple is 5-8cm, and at a distance of 0.5-2cm between the fixing end of every two wire rope pipe nipples and described internal surface of sleeve pipe.
5. coal bed gas well according to claim 1 drags for sand instrument, it is characterized in that, the angle of inclination of described oblique point is 45 degree.
6. coal bed gas well according to claim 1 drags for sand instrument, it is characterized in that, described salvaging connecting rod is drilling rod or operation tubing.
7. coal bed gas well according to claim 1 drags for sand instrument, it is characterized in that, described salvaging connecting rod, described crossover sub, described sleeve pipe are threaded from top to bottom in turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420546779.2U CN204113167U (en) | 2014-09-22 | 2014-09-22 | A kind of coal bed gas well drags for sand instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420546779.2U CN204113167U (en) | 2014-09-22 | 2014-09-22 | A kind of coal bed gas well drags for sand instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204113167U true CN204113167U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420546779.2U Expired - Fee Related CN204113167U (en) | 2014-09-22 | 2014-09-22 | A kind of coal bed gas well drags for sand instrument |
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| CN (1) | CN204113167U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930522A (en) * | 2018-08-16 | 2018-12-04 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of minery CBM Drilling wire rope fishing tool and Refloatation method |
-
2014
- 2014-09-22 CN CN201420546779.2U patent/CN204113167U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930522A (en) * | 2018-08-16 | 2018-12-04 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of minery CBM Drilling wire rope fishing tool and Refloatation method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |