CN107795282B - Double control channel pulse jet ball tooth drill bit - Google Patents
Double control channel pulse jet ball tooth drill bit Download PDFInfo
- Publication number
- CN107795282B CN107795282B CN201711162639.XA CN201711162639A CN107795282B CN 107795282 B CN107795282 B CN 107795282B CN 201711162639 A CN201711162639 A CN 201711162639A CN 107795282 B CN107795282 B CN 107795282B
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- drill bit
- control
- control channel
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- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000011435 rock Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 10
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Nozzles (AREA)
Abstract
The invention relates to a double-control-channel pulse jet spherical tooth drill bit which consists of a pressure head, a double-control-channel monostable jet element, a drill bit body and an internal flow channel. The double-control-channel monostable jet element, the upper end pressure head and the peripheral bit body form a whole in a welding mode. The double control channel bistable jet element is internally provided with a large control channel, a small control channel and a large fluid outlet and a small fluid outlet which are respectively connected with the large nozzle and the small nozzle of the drill bit. In the collision-separation process of the impact hammer and the drill bit, one of the double control channels is opened and closed periodically, and the fluid in the jet flow element is switched at high frequency to generate pulse jet flow, so that the cleaning effect of the bottom of the nozzle hole is enhanced. The impact hammer impact process is not negatively influenced by pressure surge generated after impact, the return start of the impact hammer is facilitated, the impact frequency is increased to a certain extent, and the rock crushing efficiency is improved.
Description
Technical Field
The invention relates to a drilling tool, in particular to a double-control-channel pulse jet flow spherical tooth drill bit.
Background
The rapid drilling of deep wells and ultra-deep well hard rock formations is a research hot spot all the time and is a future development direction. The pressure holding effect caused by the pressure of the hydrostatic column with a large deep well often makes the rock fragments at the bottom of the hole difficult to clean thoroughly. This is especially true for down-the-hole hammer drilling processes. To ensure that the ram impact energy is transferred downhole, the pressure at the entry of the down-the-hole hammer button bit is often small to avoid the adverse effects of fluid back pressure on the ram impact motion. The lower nozzle inlet pressure plus the presence of leaks in the bit spline mating portion makes the down-the-hole hammer button bit nozzle jet fluid less effective in removing cuttings. In addition, the rotation speed of the down-the-hole hammer is far smaller than that of the conventional rotation drilling process when the down-the-hole hammer drills, so that the coverage range of a relatively fixed nozzle position to the hole bottom is smaller in the same time, the accumulation of rock fragments caused by insufficient power of a flushing medium at the hole bottom is aggravated, a series of problems such as repeated crushing, local overhigh temperature, aggravation of drill bit abrasion and the like are further caused, and finally, the problems are manifested as reduced drilling efficiency and increased cost.
Disclosure of Invention
The invention provides a double-control-channel pulse jet flow spherical tooth drill bit, which aims to solve the contradiction between the influence of back pressure and sufficient hole bottom cleaning power. The drill bit is matched with the drill bit fluid channel by utilizing high-frequency reciprocating impact of the impact hammer, high-frequency oscillation jet flow is formed at the bottom of the hole, hydraulic pulse formed by jet flow switching can be used for strengthening the purifying capacity of the bottom of the hole, and adverse effects of high back pressure generation and impact energy reduction of the impact hammer on broken rock can be avoided.
The technical scheme adopted by the invention is as follows:
the invention relates to a double-control channel pulse jet spherical tooth drill bit which mainly comprises a pressure head, a double-control channel monostable jet element and a drill bit body, wherein the pressure head, the double-control channel monostable jet element and the drill bit body are integrated in a welding mode. The pressure head is used for sealing the bistable jet element with the double control channels in the drill bit body, and the inside of the pressure head is respectively provided with a passage communicated with the nozzle of the bistable jet element with the double control channels and the control channel of the bistable jet element with the double control channels; the double-control-channel monostable jet element is of a cuboid structure, a fluid channel is formed by slotting on the side surface, the asymmetric design of the double control channels is adopted in design, the right control channel is larger than the flow area of the left control channel, the left wall surface and the right wall surface which are respectively positioned below the left control channel and the right control channel are different in distance from the central line of the nozzle of the double-control-channel monostable jet element, and the left wall surface is closer to the central line of the nozzle of the double-control-channel monostable jet element relative to the right wall surface and has smaller included angle with the vertical direction; two blind holes with different diameters are formed in the drill bit body and are respectively connected to two outlets of the double-control-channel monostable jet element, wherein the large blind hole is connected with the large nozzle, and the small blind hole is connected with the small nozzle.
Before the impact hammer collides with the drill bit, drilling fluid enters the bistable jet element with double control channels through the nozzle of the bistable jet element with double control channels and the two control channels. Because the two control channels are different in size and the distances between the left wall surface and the right wall surface and the central line of the nozzle of the bistable jet flow element of the double control channels are different, drilling fluid can stably attach to the left wall surface and pass through the bottom of a large nozzle flushing hole; when the impact hammer collides with the drill bit, the right control channel is blocked, and the drilling fluid entering the double control channel monostable jet element is attached to the right wall surface and enters the small nozzle of the drill bit under the action of the fluid thrust from the left control channel, so that pressure surge is generated inside the drill bit and pulse jet is formed at the bottom of the hole. In the repeated collision and separation process of the impact hammer and the drill bit, the right control channel in the double control channel is opened and closed periodically, and drilling fluid entering the single stable jet element of the double control channel is switched at high frequency immediately, so that high-frequency pulse jet flushing hole bottom is generated.
The number of the nozzles connected with the large blind holes and the small blind holes is multiple.
The beneficial effects of the invention are as follows:
the high-frequency reciprocating impact hammer is regarded as a control valve, and fluid in the double-control-channel monostable jet element is switched between fluid channels with different diameters at the moment of impact so as to form high-frequency pressure pulse at the bottom of a well; the asymmetrical double control channel design increases the fluid overflow rate and ensures that the drill bit inlet is in a low-pressure state before impact; the pressure increase is completed after the impact contact between the impact hammer and the drill bit, so that the impact process is not negatively affected; the design makes full use of the characteristic of good cleaning effect of pulse water jet flow on the premise of not influencing the movement of the impact hammer, effectively solves the problem that rock scraps are easy to accumulate when deep holes are drilled quickly, reduces repeated crushing and prolongs the service life of the drill bit. Meanwhile, the fluid channel is switched, so that the jet flow injection position is changed, the defects of low rotating speed and small coverage range of injection fluid of the ball tooth drill bit of the down-the-hole hammer are overcome to a certain extent, and the rock debris removal effect is further enhanced; because of the sudden increase of the pressure after the impact, the return response of the impact hammer is accelerated, the impact frequency is improved to a certain extent, and the drilling efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a dual control channel pulse jet ball tooth drill bit of the present invention;
FIG. 2 is a cross-sectional view of A-A at a dual control channel monostable fluidic element of the present invention.
In the figure: i, a pressure head, II, a double-control channel monostable jet element, III, a drill bit body, 1, a pressure head central channel, 2, a double-control channel monostable jet element nozzle, 3, a pressure head control channel, 4, a left control channel, 5, a right control channel, 6, a jet element small outlet, 7, a jet element large outlet, 8, a small blind hole, 9, a large blind hole, 10, a large nozzle, 11, a small nozzle, 12, 13 and a left wall.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example 1
Referring to fig. 1-2, the dual-control-channel pulse jet spherical tooth drill bit in the embodiment mainly comprises a pressure head I, a dual-control-channel monostable jet element II and a bit body III. A large blind hole 9 and a small blind hole 8 are respectively arranged in the drill bit body III, wherein the large blind hole 9 is communicated with two large nozzles 10, and the small blind hole 8 is connected with two small nozzles 11; the inside of the pressure head I is provided with a pressure head center channel 1 which is respectively communicated with the double-control-channel monostable jet element nozzle 2 and a pressure head control channel 3 which is communicated with the double-control-channel monostable jet element nozzle 2; the double-control-channel monostable jet element II is a complete rectangular block, one side of the double-control-channel monostable jet element is welded with the pressure head I, ground and then placed into the bit body III, and the pressure head I and the bit body III are welded into a whole. Conventional bit tail channels are provided to the front end of the ram to further strengthen the bit. The right control channel 5 of the double-control channel monostable jet element is larger than the flow area of the left control channel 4, and compared with the right wall surface 12 below the right control channel 5, the left wall surface 13 below the left control channel 4 has smaller vertical axial included angle and is also closer to the center line of the nozzle 2 of the double-control channel monostable jet element, so that the main jet sprayed by the nozzle 2 of the double-control channel monostable jet element is easier to adhere to the left wall surface 13 and flows to the bottom of a hole through the large nozzle 10; when the impact hammer collides with a drill bit, a diversion trench on the impact hammer is opposite to the left control channel 4, so that the flow-through smoothness is kept, the right control channel 5 communicated with the right side of the pressure head control channel 3 is blocked by the lower end surface of the impact hammer, thus negative pressure is formed in the right control channel 5, the fluid on the left side is instantaneously switched to the right side to enter the small nozzle 11 by the pushing action of the fluid on the left control channel 4, and the pressure in the drill bit is increased rapidly to form a strong jet flow cleaning hole bottom; along with the high-frequency reciprocating impact of the impact hammer, the drill bit forms high-frequency pulse jet flow at the bottom of the hole, so that the hole bottom rock debris removal efficiency can be effectively improved. The double control channel design has the advantages that by adding a larger flow channel, the lower pressure at the inlet of the drill bit can be ensured under the condition of larger flow, and the influence of back pressure on the movement of the impact hammer can be further reduced.
Claims (2)
1. The utility model provides a double control way pulse jet ball tooth drill bit which characterized in that: the device comprises a pressure head, a double-control-channel monostable jet element and a drill bit body, wherein the pressure head seals the double-control-channel monostable jet element in the drill bit body, a pressure center channel communicated with a nozzle of the double-control-channel monostable jet element and a pressure control channel communicated with a control channel of the double-control-channel monostable jet element are respectively arranged in the pressure head, the double-control-channel monostable jet element is arranged in the drill bit body and is of a cuboid structure, a fluid channel is formed by slotting on the side surface, the asymmetric design of the double-control channel is adopted, the flow area of a right control channel is larger than that of a left control channel, compared with that of a right wall below the left control channel, the included angle between the left wall and the vertical direction is smaller and is closer to the center line of the nozzle of the double-control-channel monostable jet element, and a large nozzle and a small nozzle are respectively connected to two outlets of the double-control-channel monostable jet element; when the impact hammer collides with a drill bit, a diversion trench on the impact hammer is opposite to a left control channel (4), so that the flow passage is kept smooth, the lower end surface of the impact hammer plugs a right control channel (5) communicated with the right side of a pressure head control channel (3), thereby forming negative pressure in the right control channel (5), and the fluid attached to the left side is instantaneously switched to a right side small nozzle (11) under the pushing action of the fluid of the left control channel (4), so that the pressure in the drill bit is increased to form a strong jet cleaning hole bottom; along with the high-frequency reciprocating impact of the impact hammer, the drill bit forms high-frequency pulse jet flow at the bottom of the hole, so that the hole bottom rock debris removal efficiency can be effectively improved.
2. The dual control channel pulse jet ball tooth drill bit of claim 1, wherein: the drill bit body is internally provided with a large blind hole and a small blind hole, the large blind hole is communicated with the large nozzle, and the small blind hole is connected with the small nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711162639.XA CN107795282B (en) | 2017-11-21 | 2017-11-21 | Double control channel pulse jet ball tooth drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711162639.XA CN107795282B (en) | 2017-11-21 | 2017-11-21 | Double control channel pulse jet ball tooth drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107795282A CN107795282A (en) | 2018-03-13 |
| CN107795282B true CN107795282B (en) | 2023-10-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711162639.XA Active CN107795282B (en) | 2017-11-21 | 2017-11-21 | Double control channel pulse jet ball tooth drill bit |
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| Country | Link |
|---|---|
| CN (1) | CN107795282B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725646B (en) * | 2018-07-17 | 2024-07-12 | 中石化石油工程技术服务有限公司 | Jet type three-dimensional composite impactor |
| CN109736714A (en) * | 2019-03-12 | 2019-05-10 | 四川吉赛特科技有限公司 | A kind of quick broken rock geophysical prospecting bit suitable for hard-rock boring |
| CN109915030A (en) * | 2019-04-23 | 2019-06-21 | 西南石油大学 | The PDC drill bit of multidirectional coupled pulse oscillation |
| CN110318677B (en) * | 2019-08-06 | 2023-12-19 | 吉林大学 | Dry-hot rock high-energy hydraulic down-the-hole hammer jet reaming device |
| CN114753769B (en) * | 2022-04-15 | 2024-10-29 | 中国石油化工股份有限公司 | Drill bit based on central multi-edge tooth modulation pulse jet flow and drilling method thereof |
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| US4262757A (en) * | 1978-08-04 | 1981-04-21 | Hydronautics, Incorporated | Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
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| US5165438A (en) * | 1992-05-26 | 1992-11-24 | Facteau David M | Fluidic oscillator |
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| CN106703701A (en) * | 2017-01-20 | 2017-05-24 | 中国石油大学(华东) | Pulse impact producing mechanism and center differential pressure drill comprising same |
| CN106930688A (en) * | 2017-03-09 | 2017-07-07 | 长江大学 | A kind of eddy current type waterpower pulse axial impact instrument |
| CN207553976U (en) * | 2017-11-21 | 2018-06-29 | 中南大学 | Double control road pulsing jet button bit |
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2017
- 2017-11-21 CN CN201711162639.XA patent/CN107795282B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4262757A (en) * | 1978-08-04 | 1981-04-21 | Hydronautics, Incorporated | Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
| SU905409A1 (en) * | 1980-06-05 | 1982-02-15 | Проектно-Конструкторская Контора Треста "Востокбурвод" | Hydraulic percussive device |
| US5230389A (en) * | 1989-12-01 | 1993-07-27 | Total | Fluidic oscillator drill bit |
| RU2023859C1 (en) * | 1991-03-27 | 1994-11-30 | Научно-исследовательский институт буровой техники | Drill bits and diamond tool |
| US5165438A (en) * | 1992-05-26 | 1992-11-24 | Facteau David M | Fluidic oscillator |
| US6109370A (en) * | 1996-06-25 | 2000-08-29 | Ian Gray | System for directional control of drilling |
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| CN103790521A (en) * | 2013-12-09 | 2014-05-14 | 中国石油大学(北京) | Safe and efficient mud drilling jet mill bit for horizontal wells |
| CN103774983A (en) * | 2013-12-25 | 2014-05-07 | 中国石油大学(华东) | Jet type torsional impact drilling tool |
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| CN105275402A (en) * | 2015-11-12 | 2016-01-27 | 中国石油大学(华东) | Particle jet flow-based drill bit for impacting and breaking rocks |
| CN106285482A (en) * | 2016-10-24 | 2017-01-04 | 中国石油大学(北京) | Crusher drill in self-excited oscillation pulse enhanced |
| CN106703701A (en) * | 2017-01-20 | 2017-05-24 | 中国石油大学(华东) | Pulse impact producing mechanism and center differential pressure drill comprising same |
| CN106930688A (en) * | 2017-03-09 | 2017-07-07 | 长江大学 | A kind of eddy current type waterpower pulse axial impact instrument |
| CN207553976U (en) * | 2017-11-21 | 2018-06-29 | 中南大学 | Double control road pulsing jet button bit |
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| Publication number | Publication date |
|---|---|
| CN107795282A (en) | 2018-03-13 |
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