CN105064921A - Double-stage drill bit - Google Patents
Double-stage drill bit Download PDFInfo
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- CN105064921A CN105064921A CN201510495057.8A CN201510495057A CN105064921A CN 105064921 A CN105064921 A CN 105064921A CN 201510495057 A CN201510495057 A CN 201510495057A CN 105064921 A CN105064921 A CN 105064921A
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- cutting
- drill bit
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- twin
- stage drill
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Abstract
The invention discloses a double-stage drill bit which comprises a pilot hole body (1) and a reaming body (2). The pilot hole body (1) is fixedly arranged above the reaming body (2). The maximum outer diameter of the pilot hole body (1) is smaller than the maximum outer diameter of the reaming body (2). A plurality of first cutting units (3) are arranged on the pilot hole body (1). The reaming body (2) is provided with a plurality of second cutting units (4). Cutting teeth (5) are distributed on the first cutting units (3) and the second cutting units (4). A first chip removing groove (6) is formed between every two adjacent first cutting units (3). A second chip removing groove (7) is formed between every two adjacent second cutting units (4). A pilot hole nozzle (8) is arranged on each first chip removing groove (6). A reaming nozzle (9) is arranged on each second chip removing groove (7). The double-stage drill bit is reasonable in design and suitable for drilling operation of the hard stratums, the upper part and the lower part act on well wall rock stratums together, and the penetrating ability of the drill bit and grinding resistant performance of an outer cone are outstanding.
Description
Technical field
The present invention relates to geological prospecting drilling tool field, be specifically related to a kind of twin-stage drill bit being applicable to hard formation and extremely hard formation and creeping into.
Background technology
PDC drill bit is a kind of drilling tool that oil drilling industry is commonly used.But it cannot use at heterogeneity hard formation at present, reason have following some: one be heterogeneity hard formation PDC drill bit wedging stratum difficulty; Two is that cutter-wear rate is fast in the drilling process of heterogeneity hard formation; Three is that PDC drill bit moment of torsion when broken rock is excessive because heterogeneity is strong, hardness is high, and drill bit is axial in shaft bottom, oscillation crosswise is serious, and the unconventional damage of cutting teeth is serious, and cutting teeth bursts apart seriously.The design of existing PDC drill bit is unreasonable, existing defects, and properties can not be taken into account, and cannot meet use.
Summary of the invention
The problem to be solved in the present invention overcomes the deficiencies in the prior art, provides a kind of twin-stage drill bit.
A kind of twin-stage drill bit of the present invention, comprise neck eye body and reaming hole body, described neck eye body is fixed at above reaming hole body, the maximum outside diameter of described neck eye body is less than the maximum outside diameter of reaming hole body, described neck eye body is provided with several the first cutting units, reaming hole body is provided with several the second cutting units, described first cutting unit and the second cutting unit are distributed with cutting teeth, the first chip area is provided with between described adjacent first cutting unit, the second chip area is provided with between described adjacent second cutting unit, described first chip area is provided with neck eye nozzle, second chip area is provided with reaming hole nozzle.
As a further improvement on the present invention, described neck eye body is long inner cone short throwing shape, and described neck eye body 1 is provided with five the first cutting units.
As a further improvement on the present invention, described reaming hole body is smoothed curve shape, and described reaming hole body is provided with five the second cutting units.
As a further improvement on the present invention, described first cutting unit and the second cutting unit correspondence are arranged, and form deflection angle theta, described deflection angle theta=5-15 ° between the first cutting unit side that described correspondence is arranged and the second cutting unit side.Be preferably described deflection angle theta=10 °
As a further improvement on the present invention, described first cutting unit and the second cutting unit are also provided with several conical tooths.Described cutting teeth is located at a side of the first cutting unit or the second cutting unit, and described conical tooth and adjacent two cutting teeths form spatial triangle structure.
As a further improvement on the present invention, the height of described conical tooth is lower than the height 0.5-1.5mm of cutting teeth.Be preferably, the height of described conical tooth is lower than the height 1.0mm of cutting teeth.
The present invention compared with prior art has the following advantages.
(1) the present invention is reasonable in design, cooperatively interacts between all parts, makes product applicability of the present invention wide, and the boring being suitable for hard bottom uses, and reduces the wearing and tearing of cutting teeth.Because neck eye body is fixed at above reaming hole body, the maximum outside diameter of described neck eye body is less than the maximum outside diameter of reaming hole body, PDC drill bit of the present invention comprises neck eye and reaming hole two parts, neck eye body is provided with several the first cutting units, reaming hole body is provided with several the second cutting units, first cutting unit and the second cutting unit are distributed with cutting teeth, by the little drill bit of neck eye wedging stratum release in advance confined pressure, drive the efficient wedging of re-drill bit.Because the first chip area and the second chip area are provided with nozzle, depart from shaft bottom for cooling and cutting carring.
(2) described neck eye body is provided with five the first cutting units, be further long inner cone short throwing shape, there is stronger aggressiveness, described reaming hole body is provided with five the second cutting units, re-drill bit adopts smoothed curve, promote drill bit abrasive resistant, the shape of neck eye body and reaming hole body limits the resistance that can reduce drill bit wedging stratum further, thus is easier to the use at hard bottom.Applicant is for heterogeneity hard formation features such as brown, Dark grey limestone, argillaceous limestone, light grey Yun Yan, cloud matter limestone alternating layers, in conjunction with bit cutting loading characteristic and wearing and tearing feature, carry out multiple comparison test, thus determined to be applicable to firmly and the outer shape of the neck eye body on heterogeneity stratum and reaming hole body.
(3) because the first cutting unit and the second cutting unit correspondence are arranged; deflection angle theta is formed between the first cutting unit side that described correspondence is arranged and the second cutting unit side; side is the wing portion of cutting teeth; thus enhance the access of cutting teeth and the borehole wall; reduce moment of torsion; protection drill bit thus strengthen stability of bit, and the mode of neck eye body and the cutting straggly of reaming hole body improves stock-removing efficiency.The cutting effect arranged in all angles and deflection angle theta=5-15 ° under the considering of protection cutting teeth, and reach best effect when deflection angle theta=10 °.
(4) due to the first cutting unit and the second cutting unit being also provided with several conical tooths.Adopt conical tooth, the Conversion of Energy produced by underground vibrating is the impact force that conical tooth breaks rock, and protection drill bit, promotes drill bit drilling efficiency.Because cutting teeth is located at a side of the first cutting unit or the second cutting unit, described conical tooth and adjacent two cutting teeths form spatial triangle structure, in drilling process, form spatial triangle structure with cutting teeth, strengthen stability of bit.Because the height of conical tooth is lower than the height 0.5-1.5mm of cutting teeth.Conical tooth participates in a small amount of cutting, strengthens the stability of drill bit further, and the height of preferred conical tooth is lower than the height 1.0mm of cutting teeth.Conical tooth the ability effectively controlling on the one hand drill bit wedging rock is set, reach again on the other hand and enhance the aggressive feature of drill bit under cutting teeth abrasion condition, thus ensure that long period rate of penetration faster.
(5) reasonable in design of the present invention, can strengthen the wedging ability of drill bit to bad ground, reduces the wearing and tearing of composite sheet at Guan Ding, outer cone place, thus extends the application life of drill bit, reaches the object reducing drilling cost.Drill bit of the present invention is mainly used in hard formation and extremely hard formation, and the advantage relying on little drill bit to be easy to creep into reaches the object of reaming while drilling, fast drilling.Also can be used for deviation control with drilling straight well, be suitable for wide.
Accompanying drawing explanation
Fig. 1 is the structural representation of twin-stage drill bit of the present invention.
Fig. 2 is the top view of twin-stage drill bit of the present invention.
In figure: 1-leads eye body, 2-reaming hole body, 3-first cutting unit, 4-second cutting unit, 5-cutting teeth, 6-first chip area, 7-second chip area, 8-leads eye nozzle, 9-reaming hole nozzle, 10-conical tooth.
Detailed description of the invention
Below in conjunction with drawings and Examples the present invention will be further explained explanation.
As shown in Figure 1-2, a kind of twin-stage drill bit, comprises neck eye body 1 and reaming hole body 2, neck eye body 1 is fixed at above reaming hole body 2, the maximum outside diameter of neck eye body 1 is more than or equal to the maximum outside diameter of reaming hole body 2, and neck eye body 1 is long inner cone short throwing shape, and neck eye body 1 is provided with five the first cutting units 3.Reaming hole body 2 is smoothed curve shape, and reaming hole body 2 is provided with five the second cutting units 4.
First cutting unit 3 and the second cutting unit 4 are distributed with cutting teeth 5, the first chip area 6 is provided with between adjacent first cutting unit 3, be provided with the second chip area 7, first chip area 6 between adjacent second cutting unit 4 to be provided with neck eye nozzle 8, second chip area 7 and to be provided with reaming hole nozzle 9.
First cutting unit 3 and the second cutting unit 4 correspondence are arranged, and form deflection angle theta, deflection angle theta=12 ° between the first cutting unit 3 side of corresponding setting and the second cutting unit 4 side
First cutting unit 3 and the second cutting unit 4 are also provided with several conical tooths 10.Cutting teeth 5 is located at a side of the first cutting unit 3 or the second cutting unit 4, and conical tooth 10 and adjacent two cutting teeths 5 form spatial triangle structure.The height of conical tooth 10 is lower than the height 1.0mm of cutting teeth 5.
embodiment 1
Twin-stage bit bore environment and progress: Chang Ling, northeast battalion city group igneous rock down-hole 3260 ~ 3640m, drilling depth 380m;
The twin-stage bit bore time: drilling time 78.5h, rate of penetration 4.84/h;
Above-mentioned data show, twin-stage drill bit of the present invention, have increased substantially the application life of rate of penetration and drill bit.
Foregoing is example of the present invention and explanation; but do not mean that the obtainable advantage of the present invention is so limited, may to wherein one or more of the advantage realized in the simple transformation of structure and/or some embodiments all in the protection domain of the application in every practice process of the present invention.
Claims (9)
1. a twin-stage drill bit, it is characterized in that: comprise neck eye body (1) and reaming hole body (2), described neck eye body (1) is fixed at reaming hole body (2) top, the maximum outside diameter of described neck eye body (1) is less than the maximum outside diameter of reaming hole body (2), described neck eye body (1) is provided with several the first cutting units (3), on reaming hole body, (2) are provided with several the second cutting units (4), described first cutting unit (3) and the second cutting unit (4) are distributed with cutting teeth (5), the first chip area (6) is provided with between described adjacent first cutting unit (3), the second chip area (7) is provided with between described adjacent second cutting unit (4), described first chip area (6) is provided with neck eye nozzle (8), second chip area (7) is provided with reaming hole nozzle (9).
2. twin-stage drill bit according to claim 1, is characterized in that: described neck eye body (1) corona shape is long inner cone short throwing shape, and described neck eye body (1) is provided with five the first cutting units (3).
3. twin-stage drill bit according to claim 1, is characterized in that: described reaming hole body (2) corona shape is smoothed curve shape, and described reaming hole body (2) is provided with five the second cutting units (4).
4. twin-stage drill bit according to claim 1, it is characterized in that: described first cutting unit (3) and the second cutting unit (4) correspondence are arranged, deflection angle theta is formed, described deflection angle theta=5-15 ° between the first cutting unit (3) side that described correspondence is arranged and the side of the second cutting unit (4).
5. twin-stage drill bit according to claim 4, is characterized in that: described deflection angle theta=10 °.
6. twin-stage drill bit according to claim 1, is characterized in that: described first cutting unit (3) and the second cutting unit (4) are also provided with several conical tooths (10).
7. twin-stage drill bit according to claim 6, it is characterized in that: described cutting teeth (5) is located at a side of the first cutting unit (3) or the second cutting unit (4), described conical tooth (10) and adjacent two cutting teeths (5) form spatial triangle structure.
8. twin-stage drill bit according to claim 6, is characterized in that: the height of described conical tooth (10) is lower than the height 0.5-1.5mm of cutting teeth (5).
9. twin-stage drill bit according to claim 6, is characterized in that: the height of described conical tooth (10) is lower than the height 1.0mm of cutting teeth (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495057.8A CN105064921A (en) | 2015-08-13 | 2015-08-13 | Double-stage drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495057.8A CN105064921A (en) | 2015-08-13 | 2015-08-13 | Double-stage drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105064921A true CN105064921A (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510495057.8A Pending CN105064921A (en) | 2015-08-13 | 2015-08-13 | Double-stage drill bit |
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| CN (1) | CN105064921A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720060A (en) * | 2019-03-18 | 2020-09-29 | 中国石油大学(华东) | Impact cutting composite two-stage drill bit |
| CN113334030A (en) * | 2021-06-07 | 2021-09-03 | 山东瑞鑫钨业有限公司 | Machining method of hard alloy teeth of mining drill bit |
| US11208847B2 (en) | 2017-05-05 | 2021-12-28 | Schlumberger Technology Corporation | Stepped downhole tools and methods of use |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5904213A (en) * | 1995-10-10 | 1999-05-18 | Camco International (Uk) Limited | Rotary drill bits |
| US7726415B1 (en) * | 2005-04-07 | 2010-06-01 | Ots International, Inc. | Fixed cutter drill bit |
| CN203905815U (en) * | 2014-02-21 | 2014-10-29 | 西南石油大学 | Double-core reaming bit with multiple stages of reaming bodies |
| CN204238859U (en) * | 2014-10-17 | 2015-04-01 | 中国石油集团长城钻探工程有限公司 | Pdc drill bit |
| CN204476280U (en) * | 2015-01-29 | 2015-07-15 | 杨英祥 | A kind of Double Circular Bit |
| CN204941348U (en) * | 2015-08-13 | 2016-01-06 | 泰州市宝锐石油设备制造有限公司 | A kind of twin-stage drill bit |
-
2015
- 2015-08-13 CN CN201510495057.8A patent/CN105064921A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5904213A (en) * | 1995-10-10 | 1999-05-18 | Camco International (Uk) Limited | Rotary drill bits |
| US7726415B1 (en) * | 2005-04-07 | 2010-06-01 | Ots International, Inc. | Fixed cutter drill bit |
| CN203905815U (en) * | 2014-02-21 | 2014-10-29 | 西南石油大学 | Double-core reaming bit with multiple stages of reaming bodies |
| CN204238859U (en) * | 2014-10-17 | 2015-04-01 | 中国石油集团长城钻探工程有限公司 | Pdc drill bit |
| CN204476280U (en) * | 2015-01-29 | 2015-07-15 | 杨英祥 | A kind of Double Circular Bit |
| CN204941348U (en) * | 2015-08-13 | 2016-01-06 | 泰州市宝锐石油设备制造有限公司 | A kind of twin-stage drill bit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11208847B2 (en) | 2017-05-05 | 2021-12-28 | Schlumberger Technology Corporation | Stepped downhole tools and methods of use |
| CN111720060A (en) * | 2019-03-18 | 2020-09-29 | 中国石油大学(华东) | Impact cutting composite two-stage drill bit |
| CN113334030A (en) * | 2021-06-07 | 2021-09-03 | 山东瑞鑫钨业有限公司 | Machining method of hard alloy teeth of mining drill bit |
| CN113334030B (en) * | 2021-06-07 | 2022-04-12 | 山东瑞鑫钨业有限公司 | Machining method of hard alloy teeth of mining drill bit |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |