CN204040909U - Anti-oblique packed hole assembly is used in underground heat exploitation - Google Patents
Anti-oblique packed hole assembly is used in underground heat exploitation Download PDFInfo
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- CN204040909U CN204040909U CN201420493854.3U CN201420493854U CN204040909U CN 204040909 U CN204040909 U CN 204040909U CN 201420493854 U CN201420493854 U CN 201420493854U CN 204040909 U CN204040909 U CN 204040909U
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- oblique
- drill collar
- hole assembly
- drilling rod
- underground heat
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Abstract
The utility model provides the exploitation of a kind of underground heat to use anti-oblique packed hole assembly.Anti-oblique packed hole assembly is used in underground heat exploitation of the present utility model, comprise drill bit, drill collar, drilling rod, connect successively between described drill bit, drill collar, drilling rod, described drilling rod is provided with one group of centralizer, inside described drill collar and described drilling rod, there is axially through duct, the outer wall of described drill collar is uniformly distributed one group and has the groove axially parallel with drill collar, and the cross section of described groove is fan-shaped.The light pressure that the utility model avoids drilling well is hung up and beaten and repeatedly makes a trip well straightening, improves drilling efficiency, ensure that the verticality of boring, improve the wellbore quality of boring.
Description
technical field:
The utility model relates to the exploitation of a kind of underground heat and uses anti-oblique packed hole assembly, belongs to earth source heat pump and develops corollary equipment technical field.
background technology:
Geothermal drilling feature is: many in 2000-3000m well depth, its heat reservori and cap rock mostly are structure Area cracked.Geothermal drilling stratum is loose, broken, interbedding of soft and hard rocks, attitude of rocks are not mild; And these distribution of strata are extensive; Geothermal drilling acquires a certain degree of difficulty.Drilling well gradient is with very much and is caused drill string wear, fatigue; Key-seating sticking; Make a trip, setting of casing difficulty; Cementing quality is poor, in order to ensure that the gradient of drilling well is in controlled scope, often needs light pressure to hang up and beat and repeatedly make a trip well straightening, and the light pressure in drilling process is hung up and beaten and repeatedly make a trip well straightening, causes drilling efficiency low.
summary of the invention:
The purpose of this utility model provides the exploitation of a kind of underground heat to use anti-oblique packed hole assembly for above-mentioned Problems existing, the light pressure avoiding drilling well is hung up and beaten and repeatedly makes a trip well straightening, improve drilling efficiency, ensure that the verticality of boring, improve the wellbore quality of boring.
Above-mentioned object is realized by following technical scheme:
Anti-oblique packed hole assembly is used in underground heat exploitation, comprise drill bit, drill collar, drilling rod, connect successively between described drill bit, drill collar, drilling rod, described drilling rod is provided with one group of centralizer, inside described drill collar and described drilling rod, there is axially through duct, the outer wall of described drill collar is uniformly distributed one group and has the groove axially parallel with drill collar, and the cross section of described groove is fan-shaped.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and described centralizer has 2.
Anti-oblique packed hole assembly is used in described underground heat exploitation, described centralizer comprises tubular body, the two ends of described tubular body have the joint be connected with described drilling rod respectively, the outer wall of described tubular body is evenly arranged one group of projection, described projection is provided with one group of ball grooves, be provided with ball inside each described ball grooves, described ball exceeds described ball grooves, and the height exceeded is not more than 20% of ball diameter.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and described joint is nipple.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and the external diameter of described centralizer is greater than the external diameter of described drilling rod.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and the wing part of described drill bit is provided with one group of helicla flute.
Beneficial effect:
1. anti-oblique packed hole assembly of the present utility model, the light pressure avoiding drilling well is hung up and beaten and repeatedly makes a trip well straightening, improves drilling efficiency, ensure that the verticality of boring, improve the wellbore quality of boring.Meanwhile, the outer wall of drill collar of the present utility model is uniformly distributed one group and has the groove axially parallel with drill collar, and the cross section of described groove is fan-shaped, and in the process of creeping into, concave part potential energy enough keeps medium motion, avoids bit freezing phenomenon occurs, and works more reliable.
2. the utility model is provided with two centralizers, combines with a drill collar, forms three point of safes of a drill collar and two centralizers like this, maintain the three point contact borehole wall on drilling tool.The linearity of well and the transverse shifting of restriction drill bit can be ensured, anti-oblique better effects if.
3. centralizer of the present utility model is set to roll structure, in the process of creeping into, become rolling friction between centralizer and the borehole wall from sliding friction, creeps into more smooth and easy.
4. wing part of the present utility model is provided with one group of helicla flute, avoids bit freezing phenomenon occurring, reliable operation in the process of creeping into.
accompanying drawing illustrates:
Fig. 1 is main TV structure schematic diagram of the present utility model.
Fig. 2 is the A-A sectional drawing of Fig. 1.
Fig. 3 is the B-B sectional drawing of Fig. 1.
In figure: 1, drill bit, 2, drill collar, 3, drilling rod, 4, centralizer; 5, axially through duct; 6, groove; 7, helicla flute; Tubular body 4-1; Joint 4-2; Protruding 4-3; Ball 4-4.
detailed description of the invention:
As shown in Figure 1-2: anti-oblique packed hole assembly is used in the underground heat exploitation of the present embodiment, comprise drill bit 1, drill collar 2, drilling rod 3, connect successively between described drill bit, drill collar, drilling rod, described drilling rod is provided with one group of centralizer 4, inside described drill collar and described drilling rod, there is axially through duct 5, the outer wall of described drill collar is uniformly distributed one group and has the groove 6 axially parallel with drill collar, and the cross section of described groove is fan-shaped.Drill bit, drill collar, be threaded connection between drilling rod, the through duct of axis inside drill collar and drilling rod is for carrying flushing liquor, in the process of creeping into, drill collar plays the rigidity improving bottom drilling rod, reduce its degree of crook, to eliminate the knockdown of drill bit, can reduce and limit the increasing hole angle power produced due to drill stem buckling, therefore drill collar needs to be full of whole well, but in the process of creeping into, often there is bit freezing phenomenon, drill collar outer wall of the present utility model is uniformly distributed one group and has the groove axially parallel with drill collar, bit freezing phenomenon is avoided while anti-oblique, work more reliable.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and described centralizer has 2.Two centralizers, combine with a drill collar, form three point of safes of a drill collar and two centralizers like this, maintain the three point contact borehole wall on drilling tool.The linearity of well and the transverse shifting of restriction drill bit can be ensured, anti-oblique better effects if.In the present embodiment, drill collar, two centralizers, be equally spaced between three, at a distance of about 9 meters, and anti-oblique better effects if.The difference of drill collar and middle centralizer diameter and bit diameter is not more than 3mm; The difference of upper centralizer diameter and bit diameter is not more than 6mm.
Anti-oblique packed hole assembly is used in described underground heat exploitation, described centralizer comprises tubular body 4-1, the two ends of described tubular body have the joint 4-2 be connected with described drilling rod respectively, the outer wall of described tubular body is evenly arranged one group of protruding 4-3, described projection is provided with one group of ball grooves, be provided with ball 4-4 inside each described ball grooves, described ball exceeds described ball grooves, and the height exceeded is not more than 20% of ball diameter.In the process of creeping into, become the rolling friction of ball on the borehole wall from sliding friction between centralizer and the borehole wall, creep into more smooth and easy.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and described joint is nipple.Screwed union connection disassembling is convenient.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and the external diameter of described centralizer is greater than the external diameter of described drilling rod.
Anti-oblique packed hole assembly is used in described underground heat exploitation, and the wing part of described drill bit is provided with one group of helicla flute 7.
Technological means disclosed in the utility model scheme is not limited only to the technological means disclosed in above-described embodiment, also comprises and replaces by above technical characteristic is equivalent arbitrarily the technical scheme formed.Unaccomplished matter of the present utility model, belongs to the common practise of those skilled in the art.
Claims (6)
1. anti-oblique packed hole assembly is used in a underground heat exploitation, comprise drill bit, drill collar, drilling rod, connect successively between described drill bit, drill collar, drilling rod, it is characterized in that: described drilling rod is provided with one group of centralizer, inside described drill collar and described drilling rod, there is axially through duct, the outer wall of described drill collar is uniformly distributed one group and has the groove axially parallel with drill collar, and the cross section of described groove is fan-shaped.
2. anti-oblique packed hole assembly is used in underground heat exploitation according to claim 1, it is characterized in that: described centralizer has 2.
3. anti-oblique packed hole assembly is used in underground heat exploitation according to claim 1 and 2, it is characterized in that: described centralizer comprises tubular body, the two ends of described tubular body have the joint be connected with described drilling rod respectively, the outer wall of described tubular body is evenly arranged one group of projection, described projection is provided with one group of ball grooves, be provided with ball inside each described ball grooves, described ball exceeds described ball grooves, and the height exceeded is not more than 20% of ball diameter.
4. anti-oblique packed hole assembly is used in underground heat exploitation according to claim 3, it is characterized in that: described joint is nipple.
5. anti-oblique packed hole assembly is used in the underground heat exploitation according to claim 1 or 2 or 4, it is characterized in that: the external diameter of described centralizer is greater than the external diameter of described drilling rod.
6. anti-oblique packed hole assembly is used in the underground heat exploitation according to claim 1 or 2 or 4, it is characterized in that: the wing part of described drill bit is provided with one group of helicla flute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493854.3U CN204040909U (en) | 2014-08-29 | 2014-08-29 | Anti-oblique packed hole assembly is used in underground heat exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493854.3U CN204040909U (en) | 2014-08-29 | 2014-08-29 | Anti-oblique packed hole assembly is used in underground heat exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204040909U true CN204040909U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420493854.3U Expired - Fee Related CN204040909U (en) | 2014-08-29 | 2014-08-29 | Anti-oblique packed hole assembly is used in underground heat exploitation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019163A (en) * | 2018-01-20 | 2018-05-11 | 西南石油大学 | Elastic ball-type casing and drill pipe protector |
| CN108397136A (en) * | 2018-04-13 | 2018-08-14 | 西南石油大学 | A kind of elastic ball-type drilling tool applied to super short radial horizontal well |
| CN109826571A (en) * | 2019-02-25 | 2019-05-31 | 中国石油天然气股份有限公司 | Small-gap low-friction-resistance casing centralizer |
| CN110630180A (en) * | 2019-10-22 | 2019-12-31 | 河南理工大学 | Coal seam drilling is protected directly and is prevented oblique device |
-
2014
- 2014-08-29 CN CN201420493854.3U patent/CN204040909U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019163A (en) * | 2018-01-20 | 2018-05-11 | 西南石油大学 | Elastic ball-type casing and drill pipe protector |
| CN108397136A (en) * | 2018-04-13 | 2018-08-14 | 西南石油大学 | A kind of elastic ball-type drilling tool applied to super short radial horizontal well |
| CN109826571A (en) * | 2019-02-25 | 2019-05-31 | 中国石油天然气股份有限公司 | Small-gap low-friction-resistance casing centralizer |
| CN110630180A (en) * | 2019-10-22 | 2019-12-31 | 河南理工大学 | Coal seam drilling is protected directly and is prevented oblique device |
| CN110630180B (en) * | 2019-10-22 | 2024-03-12 | 河南理工大学 | Coal seam drilling straight-keeping and inclined-preventing device |
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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 |
Granted publication date: 20141224 Termination date: 20190829 |
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| CF01 | Termination of patent right due to non-payment of annual fee |