CN101382043A - Combined drill for drilling with casing - Google Patents
Combined drill for drilling with casing Download PDFInfo
- Publication number
- CN101382043A CN101382043A CNA2007100148884A CN200710014888A CN101382043A CN 101382043 A CN101382043 A CN 101382043A CN A2007100148884 A CNA2007100148884 A CN A2007100148884A CN 200710014888 A CN200710014888 A CN 200710014888A CN 101382043 A CN101382043 A CN 101382043A
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- CN
- China
- Prior art keywords
- casing
- drilling
- drill bit
- drill
- bit plug
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 66
- 230000036346 tooth eruption Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 210000000515 tooth Anatomy 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The invention relates to a casing drilling combined drill which comprises a casing column, a casing shoe, a drill bit plug and a changeable tool assembly. The casing drilling combined drill is characterized in that the casing shoe is connected with the casing column through screw threads, the drill bit plug is connected with the changeable drilling tool assembly through screw threads, and the casing shoe and the drill bit plug form the casing drilling combined drill through the positioning of positioning steps of the casing shoe and the drill bit plug. When the drill bit plug needs changing or other measuring tools are needed to be put into a well during the casing drilling construction, the drill column is not needed to be pulled out just like a conventional drilling process; instead, the changeable drilling tool assembly and the drill bit plug are pulled out of the well top through a cable winch system, and the drilling can be continued after the good changeable assembly and the good drill bit plug are sent in through the cable winch system.
Description
Technical field
The present invention relates to a kind of combined drill for drilling with casing that is used for oil, Natural Gas Drilling Operation.
Background technology
Casing drilling is meant that directly adopting sleeve pipe to replace traditional drilling rod transmits mechanical energy and hydraulic energy to the down-hole in drilling process, DHA is connected on below the casing string, the setting of casing while creeping into, the sleeve pipe of using as drill string after the finishing drilling are stayed a kind of advanced drilling mode of using as completion in the well.New casing combined drill for drilling with drilling technology will creep into setting of casing and be merged into an operation process, and removing in sleeve pipe of drill bit and downhole tool carried out, and no longer need conventional round trip.The purpose of Casing Drilling Technique is to reduce drilling cost, improves drilling efficiency and use with boring the setting of casing mode well problem is controlled to minimum level.Casing Drilling Technique is usually divided two kinds of forms, and a kind of is the one-stroke casing drilling, i.e. the not interchangeable structure of drill bit, and drill bit directly links to each other with casing string, and the degree of depth of drilling well is relevant with the life-span of drill bit; Second kind is that the multiple-pass casing drilling is the interchangeable structure of drill bit, and drill bit is that pilot bit and interchangeable drilling assembly link together, and links to each other with casing string by the special construction on the interchangeable drilling assembly again, and drill bit is realized lifting in sleeve pipe, and more bit change does not promptly pull out of hole.The degree of depth of drilling well is not only relevant with the life-span of pilot bit, but also relevant with the life-span of reaming hole instrument; Existing interchangeable drilling assembly is made up of pilot bit and reaming hole instrument, gets out neck eye earlier by pilot bit when creeping into, immediately following thereafter reaming hole instrument neck eye enlarged-diameter to the well of certain interval being arranged with sleeve pipe.Because the life-span of present reaming hole instrument is limited, often the life-span because of the reaming hole instrument proposes interchangeable drilling assembly in the casing drilling process, can not be synchronous with pilot bit, prolonged drilling time, and increased drilling cost.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of combined drill for drilling with casing.When the exceptional well body structure, adopt this kind combined drill for drilling with casing, can reduce the workload of the reaming hole instrument in the interchangeable drilling assembly in the casing drilling, improve the life-span of reaming hole instrument.Along with the development of new drilling, new technology, ripe gradually and the expansion of using of Casing Drilling Technique, existing casing drilling DHA can not satisfy the needs of current drillng operation.Purpose of the present invention just provides a kind of combined drill for drilling with casing.
For solving the problems of the technologies described above, combined drill for drilling with casing of the present invention comprises casing string, casing shoe, drill bit plug and interchangeable drilling assembly, casing shoe is connected with the casing string of transfer torque by screw thread, the drill bit plug is connected by the middle interchangeable drilling assembly of screw thread and casing string, and casing shoe and drill bit plug are formed a complete comprehensive Drilling bore bit by its positioning step location.Casing shoe is hollow cylindrical, and upper design has screw thread, is connected with casing string by screw thread, and the bottom design has toe-cap, is welded with cutting teeth and gauge teeth on the toe-cap, and the inner chamber design has positioning step.The stepped elongated cylindrical of drill bit plug, upper design has the taper thread that can bear than high pulling torque, the interchangeable tool combinations in top connects, middle design has the long-neck of heavy wall, can bear the snap-in force and the moment of torsion of tong, make things convenient for threaded together, the bottom design has bit, and cutting teeth being housed on the bit and designing has wing and chip area.
Advantage of the present invention is: can reduce the workload of the reaming hole instrument in the interchangeable drilling assembly in the casing drilling, improve the life-span of reaming hole instrument, shorten well construction period, reduce drilling cost.
Description of drawings
Fig. 1 is a kind of generalized section of combined drill for drilling with casing.
Among the figure: 1 casing string, 2 interchangeable tool combinations, 3 casing shoes, 4 drill bit plugs, 5 gauge teeths, 6 cutting teeths
The specific embodiment
Below according to Fig. 1, the present invention is further described.
By shown in Figure 1, a kind of combined drill for drilling with casing comprises casing string 1, casing shoe 3, drill bit plug 4 and interchangeable tool combinations 2.Casing shoe 3 is connected with the casing string 1 of transfer torque by screw thread, and drill bit plug 4 is connected by the middle interchangeable drilling assembly 2 of screw thread and casing string, and casing shoe 3 and drill bit plug 4 are formed a complete comprehensive Drilling bore bit by its positioning step location.
Combined drill is as the efficient rock-breaking instrument in the casing drilling process, and ring sleeve footwear 3 and drill bit plug 4 synchronous same-speeds creep into, and setting of casing work is finished in the follow-up of casing string 1 simultaneously.When drill bit plug 4 lost efficacy the drill bit plug 4 that need more renew when maybe needing to be lowered to other survey tool, need not trip out drill string as conventional drilling, but utilize the cable winch system that interchangeable drilling assembly 2 and drill bit plug 4 are proposed well head, good interchangeable drilling assembly 2 and drill bit plug 4 are sent into again with the cable winch system again, can be crept into again.
The present invention can reduce the workload of the reaming hole instrument in the interchangeable drilling assembly in the casing drilling, reduced make a trip, down-hole accident such as blowout and bit freezing, improved drilling safety, reduced drilling cost.
Claims (3)
1. combined drill for drilling with casing, it is characterized in that casing string (1), casing shoe (3), drill bit plug (4) and interchangeable tool combinations (2), casing shoe (3) is connected with casing string (1) by screw thread, drill bit plug (4) is connected with interchangeable drilling assembly (2) by screw thread, and casing shoe (3) and drill bit plug (4) form combined drill for drilling with casing by its positioning step location.
2. a kind of combined drill for drilling with casing according to claim 1 is characterized in that: casing shoe (3) is a hollow cylindrical, and top is provided with screw thread, and the bottom design has toe-cap, and cutting teeth (6) and gauge teeth (5) are housed on the toe-cap, and inner chamber is provided with positioning step.
3. a kind of combined drill for drilling with casing according to claim 1, it is characterized in that: drill bit plug (4) is the staged elongated cylindrical, and top is provided with tapered thread, and the centre is provided with the long-neck of heavy wall, the bottom is provided with bit, cutting teeth (6) is housed on bit and is provided with wing and chip area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100148884A CN101382043A (en) | 2007-09-07 | 2007-09-07 | Combined drill for drilling with casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100148884A CN101382043A (en) | 2007-09-07 | 2007-09-07 | Combined drill for drilling with casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101382043A true CN101382043A (en) | 2009-03-11 |
Family
ID=40462070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100148884A Pending CN101382043A (en) | 2007-09-07 | 2007-09-07 | Combined drill for drilling with casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101382043A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114812A (en) * | 2013-03-05 | 2013-05-22 | 山东托普森金刚石钻头有限公司 | Diamond compact annular concentric simultaneous casing drilling bit and working method thereof |
| CN103291237A (en) * | 2013-06-13 | 2013-09-11 | 中国海洋石油总公司 | Circumferential locking device for coring in sediment stratum |
| CN103643893A (en) * | 2013-12-19 | 2014-03-19 | 中煤科工集团西安研究院有限公司 | Sieve tube drilling process for outburst coal seam section in underground coal mine |
| CN106014352A (en) * | 2016-05-18 | 2016-10-12 | 中煤科工集团西安研究院有限公司 | Tube following sieve tube feeding device outside coal mine underground drill pipe and construction method thereof |
| CN110469269A (en) * | 2018-05-10 | 2019-11-19 | 新奥科技发展有限公司 | A kind of millimeter wave drill bit and millimeter wave drilling equipment |
| CN112196493A (en) * | 2020-09-14 | 2021-01-08 | 中国电建市政建设集团有限公司 | Improved well completion process method suitable for water-saturated thick-layer fine sand layer |
-
2007
- 2007-09-07 CN CNA2007100148884A patent/CN101382043A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114812A (en) * | 2013-03-05 | 2013-05-22 | 山东托普森金刚石钻头有限公司 | Diamond compact annular concentric simultaneous casing drilling bit and working method thereof |
| CN103291237A (en) * | 2013-06-13 | 2013-09-11 | 中国海洋石油总公司 | Circumferential locking device for coring in sediment stratum |
| CN103643893A (en) * | 2013-12-19 | 2014-03-19 | 中煤科工集团西安研究院有限公司 | Sieve tube drilling process for outburst coal seam section in underground coal mine |
| CN106014352A (en) * | 2016-05-18 | 2016-10-12 | 中煤科工集团西安研究院有限公司 | Tube following sieve tube feeding device outside coal mine underground drill pipe and construction method thereof |
| CN110469269A (en) * | 2018-05-10 | 2019-11-19 | 新奥科技发展有限公司 | A kind of millimeter wave drill bit and millimeter wave drilling equipment |
| CN110469269B (en) * | 2018-05-10 | 2021-06-22 | 新奥科技发展有限公司 | Millimeter wave drill bit and millimeter wave drilling equipment |
| CN112196493A (en) * | 2020-09-14 | 2021-01-08 | 中国电建市政建设集团有限公司 | Improved well completion process method suitable for water-saturated thick-layer fine sand layer |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090311 |