CN201121488Y - Drilling bit plug for casing tube well drilling - Google Patents
Drilling bit plug for casing tube well drilling Download PDFInfo
- Publication number
- CN201121488Y CN201121488Y CNU2007200276036U CN200720027603U CN201121488Y CN 201121488 Y CN201121488 Y CN 201121488Y CN U2007200276036 U CNU2007200276036 U CN U2007200276036U CN 200720027603 U CN200720027603 U CN 200720027603U CN 201121488 Y CN201121488 Y CN 201121488Y
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- CN
- China
- Prior art keywords
- drilling
- drill
- drill bit
- casing
- hole
- 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
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 57
- 230000036346 tooth eruption Effects 0.000 claims abstract description 8
- 238000004904 shortening Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 210000000515 tooth Anatomy 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relates to a drill plug used in sleeve well drilling. The drill plug is characterized in that a drill plug body is of a step-shaped long column shape with a taper thread at the upper part, a thick-wall column with a semi through hole in the middle and a cutting head at the lower part; a crown part of the cutting head is provided with cutting teeth, a blade and a junk slot in which a water hole is arranged and communicated with the thick-wall column with the semi through hole. The outer edge of the drill plug is provided with positioning steps rather than gauge teeth so as to combine with a particular sleeve shoe to form a sleeve drilling assembled drill. The drill can be arbitrarily replaced when being damaged, thereby shortening the time for well drilling and reducing the well drilling cost.
Description
Technical field
The utility model relates to a kind of casing drilling that is used for oil, Natural Gas Drilling Operation new drill plug.
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, creep on the limit, and limit setting of casing, 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 Casing Drilling Technique purpose 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 divided two kinds of forms usually, and a kind of is that the one-stroke casing drilling is 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
For overcoming the loaded down with trivial details structure of DHA pilot bit and enlarging while drilling device in the present casing drilling, and existing reamer relatively poor shortcoming of reliability under high pulling torque, utilize the utility model to be combined into combined drill and improve drilling safety with special casing shoe.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.The purpose of this utility model provides a kind of casing drilling drill bit plug more reliably for Casing Drilling Technique exactly.
The design scheme that its technical problem that solves the utility model adopts is: the stepped elongated cylindrical of drill bit plug body external form, top is provided with taper thread, the centre is provided with the heavy wall cylinder of half through hole, the bottom is provided with bit, cutting teeth is housed on the bit bizet and is provided with wing and chip area, the hydrophthalmia design communicates in chip area and with the heavy wall cylinder of half through hole.Screw thread is connected with the interchangeable tool combinations in top, and the heavy wall cylinder physical efficiency that the centre is designed to half through hole is born the snap-in force and the moment of torsion of tong, makes things convenient for threaded together; The bit whole profile of bottom design is inner conical, has guaranteed the stationarity of creeping into; Chip area adopts low-angle, large space, the design of plan streamlined, satisfies the convenience of processing and the fluency requirement of chip removal; Drill bit edge does not beyond the Great Wall have the gauge teeth design, is convenient to form complete combined drill for drilling with casing with special casing shoe.
The utility model has the advantages that with comprehensive Drilling bore bit that casing shoe is formed, runner is big, the cloth tooth is many, and the life-span is long, is satisfying existing casing drilling equipment requirement, when having inherited the various advantage of casing drilling, convenient, reliable, durable, reduce the generation of down-hole accidents such as bit freezing; Shorten drilling time, reduce drilling cost.
Description of drawings
Fig. 1 is the schematic diagram of a kind of casing drilling with the drill bit plug.
Among the figure: 1 body, 2 cutting teeths
The specific embodiment
According to Fig. 1 the utility model is further described below.
A kind of casing drilling new drill plug mainly is made up of body 1 and cutting teeth 2.The stepped elongated cylindrical of drill bit plug body 1 external form, top is provided with taper thread, and the centre is provided with the heavy wall cylinder of half through hole, and the bottom is provided with bit, cutting teeth 2 is housed on the bit bizet and is provided with wing and chip area, the hydrophthalmia design communicates in chip area and with the heavy wall cylinder of half through hole.Screw thread design becomes can bear the taper thread of bigger moment of torsion, is connected with the interchangeable tool combinations in top.The heavy wall cylinder of middle half through hole, length is longer, lays tong in the time of can making things convenient for threaded together, and can bear the snap-in force and the moment of torsion of tong.The bottom bit is important cutting tip, design has wing above, and cutting teeth 2 is housed on wing, bit bizet shape utilization wide-angle, long profile, large space design, make whole bizet can arrange more cutting teeth 2, the design of wing type increases the cutting power of drill bit plug; The bit bottom profile is inner conical, guarantees the stationarity of creeping into; Design has chip area in the middle of two wings, and chip area adopts low-angle, large space, the design of plan streamlined, satisfies the convenience of processing and the fluency requirement of chip removal, and the chip area cross section is male-tapered, makes things convenient for the discharge of landwaste; Drill bit edge does not beyond the Great Wall design gauge teeth, is convenient to be combined into complete combined drill for drilling with casing with special casing shoe.Drill bit edge design beyond the Great Wall has positioning step, is used for axial location.
The utility model has the advantages that: form comprehensive Drilling bore bit with special casing shoe, runner is big, and the cloth tooth is many, Life-span is long, is satisfying existing casing drilling equipment requirement, when having inherited the various advantage of casing drilling, Reduce the generation of the down-hole accidents such as bit freezing; Shorten drilling time, reduce drilling cost.
Claims (4)
1. casing drilling drill bit plug, it is characterized in that: the stepped elongated cylindrical of drill bit plug body (1) external form, top is provided with taper thread, the centre is provided with the heavy wall cylinder of half through hole, the bottom is provided with bit, cutting teeth (2) is housed on the bit bizet and is provided with wing and chip area, the hydrophthalmia design communicates in chip area and with the heavy wall cylinder of half through hole.
2. a kind of casing drilling drill bit plug according to claim 1 is characterized in that the bit bizet is designed to inner conical.
3. a kind of casing drilling drill bit plug according to claim 1 is characterized in that chip area is designed to streamlined.
4. a kind of casing drilling drill bit plug according to claim 1 is characterized in that drill bit edge design beyond the Great Wall has positioning step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200276036U CN201121488Y (en) | 2007-09-07 | 2007-09-07 | Drilling bit plug for casing tube well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200276036U CN201121488Y (en) | 2007-09-07 | 2007-09-07 | Drilling bit plug for casing tube well drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201121488Y true CN201121488Y (en) | 2008-09-24 |
Family
ID=40008714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200276036U Expired - Fee Related CN201121488Y (en) | 2007-09-07 | 2007-09-07 | Drilling bit plug for casing tube well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201121488Y (en) |
-
2007
- 2007-09-07 CN CNU2007200276036U patent/CN201121488Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 Termination date: 20110907 |