CN201354591Y - Permafrost drill bit - Google Patents
Permafrost drill bit Download PDFInfo
- Publication number
- CN201354591Y CN201354591Y CNU2009201058930U CN200920105893U CN201354591Y CN 201354591 Y CN201354591 Y CN 201354591Y CN U2009201058930 U CNU2009201058930 U CN U2009201058930U CN 200920105893 U CN200920105893 U CN 200920105893U CN 201354591 Y CN201354591 Y CN 201354591Y
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- China
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- drill bit
- shaped cutter
- permafrost
- cutter hub
- gap
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- Expired - Fee Related
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Abstract
The utility model relates to a permafrost drill bit which is applied to well drilling in geophysical prospecting of permafrost in severe cold districts. The drill bit is characterized in that a U-shaped cutter body adopts the structure that symmetrical openings are arranged on the wall of a steel tube; the opening is strip-shaped; the width of the upper part of the opening is smaller than that of the lower part thereof; and the cutter body is U-shaped. A threaded connector is fixed at the upper end of the U-shaped cutter body, and a drill stem external threads are arranged at the top end of the threaded connector. Triangular cutting teeth are arranged at the lower end of the U-shaped cutter body. A rock debris containing space is formed in the center of the U-shaped cutter body. The drill bit has the advantages that high-efficiency well drilling in permafrost in severe cold districts can be realized. Under the conditions of identical drilling machine and identical permafrost, compared with common drill bit, the time for drilling through the permafrost of the permafrost drill bit is improved by 78 percent, and the well drilling efficiency in permafrost is greatly improved.
Description
Technical field
The utility model relates to the oil seismic exploration technical field, and particularly a kind of drill bit of petroleum exploration rig well is that a kind of suitable extremely frigid zones ice soil freezes the efficient drill bit of layer physical prospecting drilling well.
Background technology
In the oil seismic exploration process, explosive is put at first drilling well in well, receives by instrument and blows out the seismic wave that produces, and judges the stratigraphic structure under the face of land.
At present, mostly the rig of drilling well employing is rotary petroleum exploration rig.The drill bit that adopts generally is divided into horizontal knive-edge drill bit (consulting Fig. 1) and spiral blade drill bit (consulting Fig. 2).Horizontal knive-edge drill bit and spiral blade drill bit are made up of blade 1 and bit body 2, on the outer wall of bit body 2 flight are arranged.Can be divided into both wings drill bit, three-wing bit again by horizontal blade drill bit.No matter horizontal knive-edge drill bit or screw type bit, working mechanism all is a scraping corresponding geological layer, does not collect the chip function.The chip that drilling process forms will be taken out of by the mud circulation that forms between the flight that is welded on the bit body outer wall or drilling rod center and pit shaft.Facts have proved that these drill bits are higher to the wellbore construction efficient on non-frozen soil stratum, the drilling efficiency that extremely frigid zones ice soil is frozen layer is then very low.In the manufacturing process, for improving drilling efficiency, purchase high-power rig usually, break through by the downward thrust that increases drilling rod and freeze layer, the result of making has increased the drilling equipment load like this, has brought huge security risk hidden danger.
Adopt common drill bit to be difficult in western hard loess tableland stratum, the someone adopts the luoyang spade well-digging, and ground be accommodated and be taken out of to luoyang spade can with stabbing broken formation fines.
The utility model content
The purpose of this utility model is: provide a kind of ice soil to freeze a layer drill bit, can realize that extremely frigid zones ice soil freezes floor height and imitates drilling well, be used for improving marsh, area, Siberia band, intermediate zone oil exploration drilling in winter efficient.
The technical solution adopted in the utility model is: ice soil freezes a layer drill bit, mainly form by cutting teeth, U-shaped cutter hub and nipple, it is characterized in that: the structure of U-shaped cutter hub is the gap that symmetry is arranged on the tube wall of steel pipe, gap is a strip, the width on the top of gap is less than the width of gap bottom, and the U-shaped cutter hub takes the shape of the letter U.The preparation method of U-shaped cutter hub is that symmetry cuts two block length bar shaped tube walls on outer wall of steel pipe, and does not cut the upper end of steel pipe, and it is complete to keep the raw steel tube wall; The lower end cross section of steel pipe is two fan-shaped rings to becoming.Whole steel pipe be shaped as the U font.Upper end at the U-shaped cutter hub is fixed with nipple, and there is the drilling rod external screw thread on the top of nipple, can be connected with drilling rod during drilling well.In the lower end of U-shaped cutter hub leg-of-mutton cutting teeth is arranged.In the middle of the U-shaped cutter hub, form the landwaste spatial accommodation.
There is blade at the edge of described U-shaped cutter hub gap, can borehole wall scraping is smooth.
Described U-shaped cutter hub upper end retaining thread joint is that welding is fixing.
In order to improve the hardness of cutting teeth, the top of described cutting teeth is welded with alloy block.
The effect of cutting teeth is the cutting and separating stratum, makes the stratum form the borehole wall.
The effect of U-shaped cutter hub is the smooth borehole wall of scraping, and the landwaste spatial accommodation is provided.
The effect of elasticity spatial accommodation is by the rotation of drilling rod and pressurization downwards, causes the drill bit internal volume to change, and it is cracked to cause that the ice soil of cutting apart freezes layer, and holds and mince.
The effect of nipple is to connect top rod.
The beneficial effects of the utility model: the utility model ice soil freezes a layer drill bit, can realize that extremely frigid zones ice soil freezes floor height and imitates drilling well.Once on probation in the petroleum seismic team of Siberia winter construction.Data analysis according to statistics, identical rig, under the identical freezing formation condition, common drill bit drills ice soil and freezes layer 28min consuming time, adopts ice soil to freeze layer drill bit about 6min consuming time, and efficient improves 78%.Greatly improve the native drilling efficiency that freezes layer of ice, prepared to drop into batch machining.
Description of drawings
Fig. 1 is horizontal knive-edge drill bit structure schematic diagram.
Fig. 2 is spiral blade drill bit schematic diagram.
Fig. 3 is that the utility model ice soil freezes a layer drill bit structure schematic diagram.
Among the figure, 1. blade, 2. bit body, 3. cutting teeth, 4.U shape cutter hub, 5. landwaste spatial accommodation, 6. nipple.
The specific embodiment
Embodiment 1: with an external diameter is 60mm, length be 0.64 meter ice soil to freeze layer drill bit be example, the utility model is described in further detail.
Consult Fig. 3.The utility model ice soil freezes a layer drill bit, mainly is made up of cutting teeth 3, U-shaped cutter hub 4 and nipple 6.The length of U-shaped cutter hub 4 is 600 millimeters, 60 millimeters of external diameters, 52 millimeters of internal diameters.The structure of U-shaped cutter hub 4 is two gap that symmetry is arranged on the tube wall of steel pipe, and gap is a strip, and the width on the top of gap is less than the width of gap bottom, and U-shaped cutter hub 4 takes the shape of the letter U.There is blade at the edge of U-shaped cutter hub 4 gap, and promptly the length of gap is 540 millimeters, 25 millimeters of upper width, 48 millimeters of lower width.Be welded with a nipple 6 in the upper end of U-shaped cutter hub 4, there is the drilling rod external screw thread on the top of nipple 6.Be distributed with leg-of-mutton cutting teeth 3 in the lower end of U-shaped cutter hub 4.Be welded with an alloy block on the top of each cutting teeth 3.In the middle of U-shaped cutter hub 4, form columned landwaste spatial accommodation 5.
Claims (4)
1, a kind of ice soil freezes a layer drill bit, mainly form by cutting teeth (3), U-shaped cutter hub (4) and nipple (6), it is characterized in that: the structure of U-shaped cutter hub (4) is the gap that symmetry is arranged on the tube wall of steel pipe, gap is a strip, the width on the top of gap is less than the width of gap bottom, U-shaped cutter hub (4) takes the shape of the letter U, be fixed with nipple (6) in the upper end of U-shaped cutter hub (4), there is the drilling rod external screw thread on the top of nipple (6), in the lower end of U-shaped cutter hub (4) leg-of-mutton cutting teeth (3) is arranged, in the middle of U-shaped cutter hub (4), form landwaste spatial accommodation (5).
2, ice soil according to claim 1 freezes a layer drill bit, it is characterized in that: there is blade at the edge of described U-shaped cutter hub (4) gap.
3, ice soil according to claim 1 freezes a layer drill bit, it is characterized in that: described U-shaped cutter hub (4) upper end retaining thread joint (6) is that welding is fixing.
4, ice soil according to claim 1 freezes a layer drill bit, it is characterized in that: the top of described cutting teeth (3) is welded with alloy block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201058930U CN201354591Y (en) | 2009-02-26 | 2009-02-26 | Permafrost drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201058930U CN201354591Y (en) | 2009-02-26 | 2009-02-26 | Permafrost drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201354591Y true CN201354591Y (en) | 2009-12-02 |
Family
ID=41410931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201058930U Expired - Fee Related CN201354591Y (en) | 2009-02-26 | 2009-02-26 | Permafrost drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201354591Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835275A (en) * | 2014-03-12 | 2014-06-04 | 卓仲表 | Rapid icebreaking drilling mechanism |
| CN107829678A (en) * | 2017-10-27 | 2018-03-23 | 吉林大学 | A kind of ice sheet drilling method of ultrasonic activation Air Reverse Circulation |
-
2009
- 2009-02-26 CN CNU2009201058930U patent/CN201354591Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835275A (en) * | 2014-03-12 | 2014-06-04 | 卓仲表 | Rapid icebreaking drilling mechanism |
| CN107829678A (en) * | 2017-10-27 | 2018-03-23 | 吉林大学 | A kind of ice sheet drilling method of ultrasonic activation Air Reverse Circulation |
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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: 20091202 Termination date: 20170226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |