CN110617012A - PDC drill bit with rotary oscillation impact function - Google Patents
PDC drill bit with rotary oscillation impact function Download PDFInfo
- Publication number
- CN110617012A CN110617012A CN201911002348.3A CN201911002348A CN110617012A CN 110617012 A CN110617012 A CN 110617012A CN 201911002348 A CN201911002348 A CN 201911002348A CN 110617012 A CN110617012 A CN 110617012A
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- CN
- China
- Prior art keywords
- drill bit
- bit
- rotary
- circumferential
- static
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/18—Roller bits characterised by conduits or nozzles for drilling fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
Abstract
The PDC drill bit with the rotary oscillation impact function comprises a drill bit static part, a drill bit movable part and a rotating body; the drill bit movable part is clamped with the drill bit static part and can rotate circumferentially. The rotating body is provided with radial through holes, and the rotating body can periodically open and close the well-flushing liquid channel. The well-flushing liquid channel is closed in a rapid rotating mode, water hammer can be generated in a drill pipe pipeline, vibration force is generated by the water hammer, the deep groove bottom position of the circumferential deepening groove is pushed to move along the circumferential direction, and rock breaking and cutting reaction force in the drilling process can enable the drill bit to rotate. Under the action of water impact force and rock breaking and cutting reaction force, the axial feeding is realized while circumferential oscillation is generated to improve the rock breaking efficiency. The beneficial effects are that: by using the drilling fluid, the circumferential vibration generated by water hammer can be controlled, and the tangential rock breaking efficiency is improved; the diversity of the functions of the new drill bit is increased; the internal space of the dynamic and static drill bits is effectively utilized; the requirement of tangential rock breaking in the rock breaking process is met, and the rock breaking efficiency is improved.
Description
Technical Field
The invention relates to a roller bit for geology, in particular to a PDC bit with a rotary oscillation impact function.
Background
Roller cone drill bits are one of the most widely used types of drilling bits. When the drill bit enters a hard stratum, the reaction force of rock on the teeth is increased, so that the tooth breaking phenomenon of the drill bit is caused, the rock breaking efficiency of the drill bit is reduced, and the service life of the drill bit is also reduced.
At present, the existing technical scheme of drill bit design and the actual situation of drilling engineering are combined, and when the drill bit is in a hard stratum or a stratum with stronger abrasiveness, the rock breaking efficiency of the drill bit is low due to the large hardness of rocks. In order to solve the problems, generally, a speed-up tool is added into a drilling tool assembly to assist a drill bit in rock breaking, but the existing various speed-up tools are complex in structure and not necessarily capable of meeting production requirements in applicability, and due to the fact that the speed-up tool is added, the length of the drilling tool assembly is increased, and working parameters of the speed-up tool also affect the working performance of a logging instrument.
201420707866.1A hydraulic pulse oscillating motor is provided for improving the rock breaking efficiency of the underground power motor, fully playing the technical advantages of axial impact in rock breaking, simultaneously increasing the oscillation drag reduction effect, protecting the drill bit and reducing the comprehensive drilling cost.
201910329215.0, the PDC drill bit for impacting rock breaking is realized by jet oscillation, a jet oscillation short section structure is added, the drill bit can be enabled to have a jet oscillation function, pulse oscillation can be generated in the rock breaking process by the drill bit on the basis of realizing the rock breaking function of the drill bit, and the rock breaking efficiency of the drill bit is improved.
The water hammer is a phenomenon of pressure intensity fluctuation caused by the rapid change of liquid flow velocity in a pressure pipeline. The water hammer can be generated when the gate in the pipeline system is opened and closed rapidly, the water pump of the water delivery pipe is shut down suddenly, the water turbine opens and closes the water guide vane, and the indoor sanitary appliance closes the faucet. The' 200420038847.0 patent utilizes the water hammer principle to produce axial motion to improve drilling efficiency.
The main rock breaking mode of the PDC drill bit is tangential rock breaking, powerful oscillating force generated by water attack can be controllably utilized, and equipment for generating circumferential vibration rock breaking impact force to improve drilling efficiency is designed.
Disclosure of Invention
In order to overcome the defects in the prior art and optimize the prior art, the invention provides the PDC drill bit with the rotary oscillation impact function.
A PDC drill bit with rotary oscillation impact function comprises a drill bit static part (1) and a drill bit (16).
The drilling machine also comprises a drill bit moving part (9) and a rotating body (17); the drill bit moving part (9) is movably clamped with the drill bit static part (1) at the position of the rotary buckle (8), and the drill bit moving part (9) can circumferentially rotate for a certain angle relative to the drill bit static part (1). The clamping of the type is mutual occlusion, so that the drill bit movable part (9) and the drill bit static part (1) can move a certain angle relative to each other in the circumferential direction and can not be disconnected.
The drill bit moving part (9) and the drill bit (16) are fixed into a whole.
The rotating body (17) is provided with a radial through hole (18), and the rotating body (17) can periodically open and close a well-flushing fluid channel in the drill bit moving part (9). The well-flushing fluid channel is opened, pressure is relieved, pressure is reduced, the well-flushing fluid channel is quickly rotated and closed, the phenomenon that pressure rises steeply in a pipeline for conveying well-flushing fluid through the whole drill rod, namely water hammer is generated, and the shock force is generated by utilizing sudden rise of the water hammer pressure.
A circumferential deepening groove (10) is formed in the drill bit movable part (9), and a static flow channel (7) of the drill bit static part (1) is communicated with the bottom (12) of the shallow groove; so that the static flow passage (7) is communicated with the circumferential deepening groove (10) to form a through blind hole. The circumferential deepening groove (10) may be a groove having a constant depth.
The vibration force can push the deep groove bottom (11) of the circumferential deepening groove (10) to move along the circumferential direction, and rock breaking and cutting reaction force in the drilling process can enable the drill bit (16) to rotate anticlockwise. Under the action of water impact force and rock breaking and cutting reaction force, the axial feeding is realized while circumferential oscillation is generated to improve the rock breaking efficiency.
The invention has the beneficial effects that: 1. the drilling fluid in the drilling process is used as a power source, and the water hammer principle is utilized to generate circumferential vibration, so that the tangential rock breaking efficiency is improved; 2. the bit body is modified, the design of the PDC bit is not changed, and the diversity of functions of a new bit is increased; 3. the inner space of the dynamic and static drill bit parts is fully utilized for design, so that the space is effectively utilized; 4. the requirement of tangential rock breaking in the rock breaking process is met, and the rock breaking efficiency is effectively improved.
Drawings
The invention will be further described with reference to the accompanying drawings.
The names of the attached drawings are:
FIG. 1: front view of the invention.
FIG. 2: AA cross-section of the invention.
FIG. 3: BB cross-section of the invention.
FIG. 4: cross-sectional view CC of the present invention.
FIG. 5: DD cross-sectional view of the present invention.
FIG. 6: EE cross-sectional view of the present invention.
FIG. 7: section 1 of the EE of the invention.
FIG. 8: section 2 of the EE of the invention.
FIG. 9: sectional view of FF of the present invention.
FIG. 10: the invention discloses a schematic diagram of a circumferential deepening groove part.
FIG. 11: the rotating body of the invention is a perspective view.
Wherein:
1-static drill bit part, 2-drill rod connecting part, 3-main runner, 4-water hammer shock cavity, 5-impeller driving hole, 6-impact hole, 7-static runner, 8-rotary buckle, 9-movable drill bit part, 10-circumferential deepening groove, 11-deep groove bottom, 12-shallow groove bottom, 13-drainage hole, 14-drainage flow cavity, 15-diversion well washing hole, 16-drill bit, 17-rotator, 18-radial through hole, 19-circumferential impeller, 20-rotator supporting groove, 21-driving water outlet hole and 22-clamping gap.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings.
As shown in fig. 1-11:
as a preferred embodiment two: the rotating action of the rotating body (17) is driven by a driving device. The driving device is driven by external force and can be a motor as described below or a hydraulic driven pump and the like.
As a preferred embodiment three: the driving device is a motor arranged in the drill bit moving part (9), and the motor is sealed and isolated from liquid flowing in the drill bit moving part (9).
As a preferred embodiment four: a circumferential impeller (19) is provided on the rotating body (17) along the circumferential direction thereof. The specific design of the peripheral impeller (19) is shown in fig. 11.
An impeller driving hole (5) is arranged on the drill bit moving part (9) and is parallel to the impact hole (6), and the impeller driving hole (5) is over against the edge part of the circumferential impeller (19). When the flushing liquid water flow flows out of the impeller driving hole (5) and flows to the tangential edge of the circumferential impeller (19), the driving force of the water flow enables the rotating body (17) to rotate. So that the radial through holes (18) and the drain holes (13) are periodically overlapped or disconnected. When the two holes are coincident, a large flow of water can flow through the radial through hole (18); when the impeller is disconnected, only a small flow of water flows through the impeller driving hole (5) and only the rotating body (17) can be driven to rotate.
The relation between the rotating speed of the rotating body (17) and water hammer generated by blocking of the drain hole (13) is adjusted by designing the diameter ratio of the impeller driving hole (5) and controlling the drain hole (13). The larger the impeller driving hole (5), the larger the rotating speed of the rotating body (17) is, the faster the drain hole (13) is closed, the more obvious the water hammer phenomenon is, the more obvious the vibration force is, but at the same time, the flow of the drain hole (13) is too small, and the vibration force of the water hammer is reduced.
The ratio of the flux of the impeller drive orifice (5) to the flux of the control bleed orifice (13) does not generally exceed 1/4.
And a driving water outlet (21) is also arranged and is respectively arranged at two sides of the circumferential impeller (19) and opposite to the impeller driving hole (5). Flows into the circumferential impeller (19) from the impeller driving hole (5), finally flows out of the water flow and merges with the drain hole (13) through the driving water outlet hole (21) to form a drain flow dividing cavity (14), and finally is discharged to be used as well-flushing liquid. The drill bit moving part (9) is fixed with the drill bit (16), a flushing fluid channel is communicated with the drill bit, and flushing fluid is discharged to a cutting area through the drill bit (16).
As a preferred embodiment five: the circumferential deepening groove (10) extends clockwise from shallow to deep; forming a sealing area at the axial contact surface of the drill bit static part (1) and the drill bit dynamic part (9), namely: the circumferential deepening groove (10) is communicated with the static flow passage (7) only at the lower opening part of the static flow passage (7), and the rest parts are not communicated with other parts.
The clockwise arrangement is to match the direction of rotation of the drill bit as is typical. When the drill bit breaks rock clockwise, the oscillating force that the water hammer produced also drives the drill bit clockwise and moves portion (9) and drill bit (16) rotatory certain angle to on the basis of the original clockwise rotation of drill bit (16), the stack oscillating force promotes and breaks the rock effect.
As a preferred embodiment six: the extension is in the clockwise direction and the angular span of the extension is 45-80 degrees.
As a preferred embodiment seven: the two circumferential deepening grooves (10) are symmetrical about the central line of the drill bit moving part (9); meanwhile, the number of the static flow channels (7) is two. The symmetrical design can ensure that the exciting force is distributed along the axis in a balanced way, so that the clockwise exciting force of the drill bit (16) is balanced.
As a preferred embodiment eight: the drill bit movable part (9) and the drill bit static part (1) are movably clamped at a rotary buckle (8), and the relative rotation angle between the two parts is limited within the range of 0-5 degrees. The rotation angle is not easy to be too large, and the relative displacement of the circumferential edge part at the movable clamping part is preferably controlled within 2 mm. The control is in millimeter range, so as to match the sliding distance of the broken rock in size order. The control of the displacement is mainly ensured by the clamping gap (22) value of the movable clamping position.
Of course, even if the reserved clearance of the movable clamping part is larger, the movable part (9) of the drill bit cannot have larger displacement relative to the static part (1) of the drill bit, and the reaction force of the rock exists in the normal rock breaking process of the drill bit.
As a preferred embodiment nine: a rolling bearing is provided in a rotor support groove (20) of the bit motion part (9) to support the rotation of the rotor (17) and reduce the friction force.
As a preferred embodiment ten: the inside of the rotating body supporting groove (20) is in clearance fit with the rotating body (17), and the maximum clearance is not more than 0.5 mm.
The embodiments of the present invention are examples of the contents of the present invention, and may be combined with other known techniques, or may be configured by being modified by omitting a part or the like within a range not departing from the gist of the present invention.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. The PDC drill bit with the rotary oscillation impact function comprises a drill bit static part (1) and a drill bit (16), and is characterized by further comprising a drill bit movable part (9) and a rotating body (17);
the drill bit movable part (9) is movably clamped with the drill bit static part (1) at a rotary buckle (8), and the drill bit movable part (9) can circumferentially rotate for a certain angle relative to the drill bit static part (1);
a radial through hole (18) is formed in the rotating body (17), and the rotating body (17) can periodically open and close a well-flushing fluid channel in the drill bit moving part (9);
a circumferential deepening groove (10) is formed in the drill bit movable part (9), and a static flow channel (7) of the drill bit static part (1) is communicated with the bottom (12) of the shallow groove; so that the static flow passage (7) is communicated with the circumferential deepening groove (10) to form a through blind hole.
2. The PDC bit having a rotary oscillating percussive function according to claim 1, wherein: the rotating action of the rotating body (17) is driven by a driving device.
3. A PDC bit having a rotary oscillating percussive function according to claim 2 wherein the drive means is a motor built into the bit driver (9) and the motor is sealed from the fluid flowing inside the bit driver (9).
4. The PDC bit having a rotary oscillating percussive function according to claim 1, wherein: a circumferential impeller (19) is arranged on the rotating body (17) along the circumferential direction thereof; an impeller driving hole (5) is arranged on the drill bit moving part (9) and is parallel to the impact hole (6), and the impeller driving hole (5) is over against the edge part of the circumferential impeller (19); a driving water outlet (21) is also arranged and is respectively arranged at two sides of the circumferential impeller (19) and opposite to the impeller driving hole (5); the driving water outlet hole (21) and the discharge hole (13) are combined in the discharge flow dividing cavity (14).
5. A PDC drill bit having a rotary oscillatory percussive function according to claim 1 or 4, characterized in that the circumferential deepening groove (10) extends in a clockwise direction from shallow to deep; forming a sealing area at the axial contact surface of the drill bit static part (1) and the drill bit dynamic part (9), namely: the circumferential deepening groove (10) is communicated with the static flow passage (7) only at the lower opening part of the static flow passage (7), and the rest parts are not communicated with other parts.
6. The PDC bit having a rotary oscillating percussive function as in claim 5 wherein the extension in the clockwise direction is over an angular span in the range of 45 ° to 80 °.
7. A PDC drill bit having a rotary oscillatory percussive function according to claim 5 or 6 characterised in that the circumferential deepening grooves (10) are two symmetrical about a centre line of the bit dynamic portion (9); meanwhile, the number of the static flow channels (7) is two.
8. A PDC drill bit with rotary oscillating percussive function according to claim 7, characterized in that the movable bit part (9) is movably clamped with the static bit part (1) at the rotary catch (8), and the relative rotation angle between the two parts is limited in the range of 0-5 °.
9. The PDC bit having the rotary oscillation percussive function according to claim 8, wherein a rolling bearing is provided in the rotary body support groove (20) of the bit motion part (9) to support the rotation of the rotary body (17).
10. The PDC drill bit having a rotary oscillating percussive function according to claim 9, wherein the rotary body support groove (20) is in clearance fit with the rotary body (17), and the maximum clearance is not more than 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002348.3A CN110617012B (en) | 2019-10-21 | 2019-10-21 | PDC drill bit with rotary oscillation impact function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911002348.3A CN110617012B (en) | 2019-10-21 | 2019-10-21 | PDC drill bit with rotary oscillation impact function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110617012A true CN110617012A (en) | 2019-12-27 |
| CN110617012B CN110617012B (en) | 2021-05-11 |
Family
ID=68926136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911002348.3A Active CN110617012B (en) | 2019-10-21 | 2019-10-21 | PDC drill bit with rotary oscillation impact function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110617012B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718465A (en) * | 2022-04-18 | 2022-07-08 | 中南大学 | Dynamic pulling-shearing tunneling drill bit and composite rock breaking method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140054092A1 (en) * | 2012-08-24 | 2014-02-27 | Buckman Jet Drilling, Inc. | Rotary jet bit for jet drilling and cleaning |
| US8899354B1 (en) * | 2009-07-06 | 2014-12-02 | Northbasin Energy Services Inc. | Drill bit with a flow interrupter |
| CN105822229A (en) * | 2016-05-16 | 2016-08-03 | 廊坊市鼎鑫联拓工贸有限公司 | PDC bit with torsion impact function |
| CN109898996A (en) * | 2019-01-24 | 2019-06-18 | 西南石油大学 | PDC drill bit with self-excitation torsional oscillation function |
| CN109915029A (en) * | 2019-04-23 | 2019-06-21 | 西南石油大学 | The PDC drill bit of multidirectional coupling fluidic oscillation |
| CN110005342A (en) * | 2019-04-23 | 2019-07-12 | 西南石油大学 | The PDC drill bit of fluidic oscillation realization rock fracture in dynamic indentation |
| CN110029939A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | Regulatable impulse hunting PDC drill bit |
| CN110029944A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | The PDC drill bit of impulse hunting realization rock fracture in dynamic indentation |
-
2019
- 2019-10-21 CN CN201911002348.3A patent/CN110617012B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8899354B1 (en) * | 2009-07-06 | 2014-12-02 | Northbasin Energy Services Inc. | Drill bit with a flow interrupter |
| US20140054092A1 (en) * | 2012-08-24 | 2014-02-27 | Buckman Jet Drilling, Inc. | Rotary jet bit for jet drilling and cleaning |
| CN105822229A (en) * | 2016-05-16 | 2016-08-03 | 廊坊市鼎鑫联拓工贸有限公司 | PDC bit with torsion impact function |
| CN109898996A (en) * | 2019-01-24 | 2019-06-18 | 西南石油大学 | PDC drill bit with self-excitation torsional oscillation function |
| CN109915029A (en) * | 2019-04-23 | 2019-06-21 | 西南石油大学 | The PDC drill bit of multidirectional coupling fluidic oscillation |
| CN110005342A (en) * | 2019-04-23 | 2019-07-12 | 西南石油大学 | The PDC drill bit of fluidic oscillation realization rock fracture in dynamic indentation |
| CN110029939A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | Regulatable impulse hunting PDC drill bit |
| CN110029944A (en) * | 2019-04-23 | 2019-07-19 | 西南石油大学 | The PDC drill bit of impulse hunting realization rock fracture in dynamic indentation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718465A (en) * | 2022-04-18 | 2022-07-08 | 中南大学 | Dynamic pulling-shearing tunneling drill bit and composite rock breaking method |
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| Publication number | Publication date |
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| CN110617012B (en) | 2021-05-11 |
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