CN113882805A - Drilling tool combination capable of drilling easily-inclined and difficultly-drilled stratum quickly - Google Patents
Drilling tool combination capable of drilling easily-inclined and difficultly-drilled stratum quickly Download PDFInfo
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- CN113882805A CN113882805A CN202111011725.7A CN202111011725A CN113882805A CN 113882805 A CN113882805 A CN 113882805A CN 202111011725 A CN202111011725 A CN 202111011725A CN 113882805 A CN113882805 A CN 113882805A
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- 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
- E21B47/00—Survey of boreholes or wells
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/10—Correction of deflected boreholes
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Abstract
The invention relates to a drilling tool assembly for drilling an easily inclined and difficultly drilled stratum at a high speed, which comprises a straight screw rod power drilling tool, a vertical drilling system and a drill bit which are sequentially connected, wherein a sensor is embedded in the drill bit and can be used for detecting the inclination angle and position information of the drill bit in real time. The vertical drilling system can receive well deviation position signals sent by the sensor in real time and can adjust well track in real time so as to realize automatic deviation correction. The invention can adopt higher mechanical rotation speed in the easily inclined and difficultly drilled stratum, realizes the purpose of quick drilling and speed increasing, and has reliable inclination correcting effect.
Description
Technical Field
The invention relates to the technical field of oilfield drilling engineering, in particular to a drilling tool assembly capable of drilling easily inclined and difficultly drilled stratum and accelerating drilling speed.
Background
The problem of preventing inclined drilling and straightening in the easily inclined and difficultly drilled stratum is always a difficult problem which puzzles the drilling field. In order to solve the problem, the drilling is realized by adopting a pendulum drilling tool assembly and a bent screw rod deflecting drilling tool assembly. When the well is deviated and needs to be declined, the two drilling tool combinations can not use too large drilling pressure absolutely, and not only can not play a role in descending, but also the inclination of the well is possibly increased. Meanwhile, the well deviation needs to be measured at any time during drilling, and drilling parameters are adjusted in time according to results, so that the drilling efficiency is seriously influenced. Therefore, when the vertical drilling is carried out on the stratum which is easy to incline and difficult to drill, the traditional inclination prevention technology is adopted, the bit pressure is difficult to release, the drilling speed cannot be improved, and the drilling benefit is severely limited.
Therefore, the inventor provides a drilling tool assembly which is easy to incline and difficult to drill a stratum and can increase the drilling speed quickly by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
Disclosure of Invention
The invention aims to provide a drilling tool assembly for drilling a formation which is easy to incline and difficult to drill and accelerating, which can achieve the purpose of drilling a formation which is easy to incline and difficult to drill by adopting higher mechanical rotating speed and has reliable deviation correcting effect.
The invention aims to realize the drilling tool assembly for drilling the easily inclined and difficultly drilled stratum and quickly increasing the speed, which comprises a straight screw rod power drilling tool, a vertical drilling system and a drill bit which are sequentially connected; a sensor is embedded in the drill bit and can be used for detecting the well inclination angle and position information of the drill bit in real time; the vertical drilling system can receive well deviation position signals sent by the sensor in real time and can adjust well track in real time so as to realize automatic deviation correction.
In a preferred embodiment of the invention, the vertical drilling system comprises a control part and a mechanical part, the control part being electrically connected to both the sensor and the mechanical part; the control part can receive well deviation position signals in real time and can control the mechanical part to act so as to adjust the track of the well hole.
In a preferred embodiment of the present invention, the sensor is a gyroscope sensor.
In a preferred embodiment of the present invention, the sensor is embedded in the center of the inner hole of the drill.
In a preferred embodiment of the invention, the drill bit is a roller cone bit, a PDC bit or a composite bit.
In a preferred embodiment of the invention, the straight screw power drill is a high torque straight screw, the torque of which is greater than 7kN · m.
In a preferred embodiment of the present invention, a first stabilizer and a second stabilizer are respectively connected to two ends of the straight screw power drill, and the second stabilizer is connected to the vertical drilling system.
In a preferred embodiment of the present invention, the first stabilizer and the second stabilizer are multi-rib stabilizers.
In a preferred embodiment of the invention, the multi-bar stabilizer has a plurality of centering bars with anti-abrasive cutting teeth disposed on the centering bars.
In a preferred embodiment of the invention, the drilling tool assembly for drilling the easily inclined and difficult-to-drill stratum and increasing the speed quickly further comprises a drill collar, and the drill collar is connected with one end of the first stabilizer, which is far away from the straight screw power drilling tool.
According to the drilling tool assembly, the straight screw power drilling tool without the bent angle, the vertical drilling system and the sensor are matched, the vertical drilling system is used for adjusting the track in real time to achieve the purpose of automatic deviation correction, the track is not adjusted by means of low-speed sliding drilling of a small-angle bent screw in the prior art, drilling pressure can be obviously relieved in an easily inclined and difficultly drilled stratum, the rock breaking efficiency is improved, the drilling speed is improved, and the purpose of quick drilling speed improvement is achieved. Meanwhile, the vertical drilling system is arranged at the end close to the drill bit and closer to the drill bit, and the sensor is embedded in the drill bit, so that the well deviation position of the drill bit at the bottom of the well can be reflected truly, and the deviation correction efficiency is higher. And the vertical drilling system realizes deviation correction through a control function, can realize better track control when applied to a difficult-to-drill stratum, and is more reliable in deviation correction.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: the structure chart of the drilling tool assembly for drilling the easily inclined and difficultly drilled stratum is provided.
FIG. 2: an enlarged view at a in fig. 1.
FIG. 3: an enlarged view at B in fig. 1.
FIG. 4: an enlarged view at C in fig. 1.
The reference numbers illustrate:
1. a drill bit; 2. a vertical drilling system; 3. a second stabilizer; 4. a straight screw power drill; 5. a first stabilizer; 6. a drill collar.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1 to 4, the present embodiment provides a drilling assembly for drilling an easily inclined and difficult-to-drill stratum at a fast speed, which includes a straight screw power drilling tool 4, a vertical drilling system 2 and a drill bit 1 connected in sequence, wherein a sensor is embedded in the drill bit 1, and the sensor can be used for detecting information of a bevel angle and a position of the drill bit 1 in real time. The vertical drilling system 2 can receive well deviation position signals sent by the sensors in real time and can adjust well track (namely, adjust the advancing direction of the drill bit 1) in real time so as to realize automatic deviation correction.
Particularly, in the prior art, too large bit pressure cannot be used in a mode of adjusting the track of a well by depending on the bending angle of a power drilling tool, so that the bit pressure is limited to a certain extent, and the drilling benefit is severely limited when the power drilling tool is applied to a difficult-to-drill stratum. Aiming at the vertical drilling system which can realize the deviation rectifying function in the prior art, the deviation rectifying function is realized mainly by the mechanical structure characteristic of the vertical drilling system, the deviation rectifying function can be automatically realized by the structural characteristic of the vertical drilling system aiming at softer stratum, the deviation rectifying function can be realized by the structure of the vertical drilling system more difficultly aiming at hard stratum, and the deviation rectifying effect is not good.
The track adjustment in the embodiment is realized by the vertical drilling system 2, the straight screw power drilling tool 4 is specifically a straight screw (the specific structure is the prior art), is a corner-free power drilling tool, is mainly used for providing rock breaking torque and rotating speed, and is not used for adjusting the track of a well hole, and the real-time deviation correction effect of the vertical drilling system 2 and the effect of the straight screw power drilling tool 4 on providing the torque and the rotating speed are not influenced during drilling; when the drilling tool is used for a difficult-to-drill stratum, the straight screw power drilling tool 4 can increase the rotating speed of the drill bit 1 so as to improve the rock breaking efficiency of the drill bit 1. Meanwhile, the vertical drilling system 2 has a control function and is matched with a sensor arranged in the drill bit 1, the internal structure action can be controlled according to well deviation position information detected by the sensor, the track is adjusted in real time during drilling, and the automatic deviation correction is realized.
Therefore, the drilling tool assembly in the embodiment utilizes the vertical drilling system 2 to adjust the track in real time to achieve the purpose of automatic deviation correction through the cooperation of the straight screw power drilling tool 4 without a bend angle, the vertical drilling system 2 and the sensor, and the track is not adjusted by means of low-speed sliding drilling of a small-angle bent screw in the prior art, so that the drilling pressure can be obviously released in a stratum which is easy to incline and difficult to drill (namely the drilling pressure is not limited, the drilling pressure can be improved), the rock breaking efficiency is improved, the drilling speed is improved, and the purpose of accelerating drilling speed is realized. Meanwhile, the vertical drilling system 2 is arranged near the drill bit end and closer to the drill bit 1, and the sensor is embedded in the drill bit 1, so that the well deviation position of the drill bit 1 at the bottom of the well can be reflected truly, and the deviation correction efficiency is higher. And the vertical drilling system 2 realizes deviation rectification through a control function, can realize better track control when being applied to a difficult-to-drill stratum, and is more reliable in deviation rectification.
In a particular implementation, the vertical drilling system 2 includes a control portion and a mechanical portion, the control portion being electrically connected to both the sensor and the mechanical portion. The control part can receive well deviation position signals in real time and can control the mechanical part to act so as to adjust the track of the well hole.
The control part receives the well deviation position signal detected by the sensor in real time and then controls the corresponding structure action of the mechanical part, so that the function of automatically controlling and adjusting the track can be realized. Even in the stratum difficult to drill, the control part can also control the mechanical part to act in time to realize deviation correction, and the control is reliable.
The specific structure of the mechanical part can be realized by any means in the prior art, for example, the vertical drilling system 2 in this embodiment can be an automatic rotary steering vertical drilling tool, the mechanical part comprises a hydraulic shaft and a biasing part, the biasing part is a mechanical actuator, the lower drill bit 1 is connected with the mechanical actuator, and the upper control part comprises three telescopic biasing blocks and a group of drilling fluid diversion valves. The control part comprises a power supply system and a signal control system, wherein the power supply system adopts a slurry turbine to generate power for continuously supplying power to the system; the signal control system receives a well deviation position signal provided by the sensor in real time, calculates a control signal through a main control unit in the signal control system, and sends a command signal in a pulse mode to control the drilling fluid diversion valve so as to control the hydraulic shaft to point to the direction to be aligned. The hydraulic shaft is controlled by the drilling fluid diversion valve to adjust the telescopic amount of the biasing block, so that a lateral force is formed, and the purpose of deviation correction control is further achieved.
For another example, the vertical drilling system 2 in this embodiment may also adopt the structure of the vertical drilling tool disclosed in the chinese patent with publication number CN104314470A, publication date 2015, 1, 28, and the sensor in this patent is arranged in the drill bit 1 according to the method of this embodiment, so as to adjust the trajectory in real time for automatic deviation correction.
Further, the sensor is embedded in the center of the inner hole of the drill bit 1, and the sensor is specifically a gyroscope sensor, so as to measure the inclination angle and the azimuth information (namely, the included angle between the advancing direction of the drill bit 1 and the vertical direction and the azimuth of the drill bit 1 deviated to the side in the horizontal plane) of the drill bit 1 in real time, and send the information to the signal control system of the vertical drilling system 2 in real time in an electromagnetic wave manner.
In order to match the difficult-to-drill stratum and prolong the service life of the drill bit 1, the drill bit 1 can adopt a roller bit, a PDC drill bit or a composite drill bit, and can adopt other high-efficiency rock breaking drill bits. For example, in the embodiment, a PDC drill bit with five blades or six blades is adopted, and double rows of special-shaped cutting teeth are adopted, so that the service life and the aggressiveness of the drill bit 1 are enhanced, and the PDC drill bit is better suitable for the difficult-to-drill stratum.
Preferably, the straight screw power drill 4 is a high torque straight screw, the torque of which is greater than 7kN · m. The straight screw power drilling tool 4 can specifically adopt a large-torque straight screw with the same wall thickness and without a bent angle, can provide larger torque output and stable rotating speed for the drill bit 1 to break rock in a difficult-to-drill stratum, and improves the rock breaking efficiency.
Further, a first stabilizer 5 and a second stabilizer 3 are respectively connected to both ends of the straight screw power drill 4, and the second stabilizer 3 is connected to the vertical drilling system 2. The whole straight screw power drilling tool 4 is provided with the double stabilizers, so that more stable rock breaking torque and rotation speed can be provided, and the inclination correction effect is improved.
Typically, the first stabilizer 5 and the second stabilizer 3 are both multi-rib stabilizers. The multi-rib stabilizer is provided with a plurality of centering ribs (usually three to five centering ribs), and the centering ribs are provided with anti-grinding cutting teeth, so that the well wall is repaired while drilling, and the high quality of the well track is ensured. The outer diameter of the multi-rib stabilizer is generally 1-4mm smaller than the outer diameter of the drill bit 1.
Furthermore, the drilling tool assembly capable of drilling in the easily inclined and difficultly drilled stratum and increasing the speed quickly further comprises a drill collar 6, the drill collar 6 is connected with one end, away from the straight screw power drilling tool 4, of the first stabilizer 5, and the drill collar 6 can be conveniently connected with a drill column on the upper portion.
Further, the following is to apply the drilling assembly of the present embodiment to a high-steep and easy-to-incline difficult-to-drill stratum in a certain area: 0.37m + 226mm vertical drilling system (PD675 series 4.23m) of phi 241.3mm high-efficiency PDC drill bit, 0.8m +238mm stabilizer, 9.45m +238mm stabilizer with large torque 7/8 head straight screw drill tool and 165mm drill collar +127mm drill rod. For comparison, the anti-slant drilling tool assembly used by the adjacent well is a composite bent screw drilling tool assembly: phi 241.3mm PDC drill bit + phi 197mm single-bending screw drill (1.25 deg.) + phi 165mm short drill collar 6+238mm stabilizer +165mm drill collar +127mm drill pipe. The comparison result shows that the well deflection fluctuates in a large range between 2.51 and 5.6 degrees in the adjacent well section of 1000-. By using the fast speed-raising drilling tool assembly for the easily inclined and difficultly drilled stratum in the embodiment, the well deviation of the well section is controlled within 0.5 degrees, the drilling pressure is relieved, the daily advancing length reaches 100 plus 150 meters, and the speed is raised by more than 2 times. It can be seen that the drilling tool assembly of the embodiment is applied to the easily-inclined and difficultly-drilled stratum, and has the advantages of better inclination correction capability, higher drilling efficiency and improved drilling benefit.
In conclusion, the embodiment provides a drilling tool assembly for realizing anti-deviation and rapid drilling in a vertical well section for an easily inclined and difficultly drilled stratum, and particularly provides a drilling tool assembly for realizing anti-deviation and rapid drilling in a composite drilling well in the prior art. The vertical well drilling device can achieve the purposes of keeping the track of the well vertical and improving the quality of the well in the vertical well drilling process; the drilling tool is particularly suitable for vertical well drilling application of high-steep, inclined and difficult-to-drill stratums, and can realize the release of drilling pressure. The large-torque power drilling tool without bend angles configured by the double stabilizers provides large rock breaking torque and high rotating speed for the drill bit 1, drilling pressure is relieved through anti-inclination control of the vertical drilling system 2, higher mechanical drilling speed can be obtained on an easily inclined and difficultly drilled stratum, and the purpose of quickly drilling the easily inclined and difficultly drilled stratum is achieved. Meanwhile, the drill bit 1 with the embedded sensor is adopted, the sensor is closer to the drill bit 1, the detection data is more real and reliable, the well deviation position of the drill bit 1 at the bottom of the well can be reflected more truly, and the deviation correction efficiency is higher.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (10)
1. A drilling tool assembly capable of drilling an easily inclined and difficultly drilled stratum and increasing the speed quickly is characterized by comprising a straight screw rod power drilling tool, a vertical drilling system and a drill bit which are connected in sequence;
a sensor is embedded in the drill bit and can be used for detecting the well inclination angle and the position information of the drill bit in real time; the vertical drilling system can receive well deviation position signals sent by the sensor in real time and can adjust well track in real time so as to realize automatic deviation correction.
2. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum according to claim 1,
the vertical drilling system comprises a control portion and a mechanical portion, the control portion being electrically connected to both the sensor and the mechanical portion; the control part can receive the well deviation position signal in real time and can control the mechanical part to act so as to adjust the track of the well hole.
3. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum according to claim 1,
the sensor is a gyroscope sensor.
4. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum according to claim 1,
the sensor is embedded in the center of the inner hole of the drill bit.
5. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum according to claim 1,
the drill bit is a roller cone drill bit, a PDC drill bit or a composite drill bit.
6. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum according to claim 1,
the straight screw power drilling tool is a high-torque straight screw, and the torque of the high-torque straight screw is larger than 7 kN-m.
7. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum according to claim 1,
and two ends of the straight screw rod power drilling tool are respectively connected with a first stabilizer and a second stabilizer, and the second stabilizer is connected with the vertical drilling system.
8. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum of claim 7,
the first stabilizer and the second stabilizer are both multi-rib stabilizers.
9. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum of claim 8,
the multi-rib stabilizer has a plurality of centering ribs, and the centering ribs are provided with anti-grinding cutting teeth.
10. The drilling assembly for drilling fast into a deviated and difficult-to-drill stratum of claim 7,
the drilling tool assembly capable of drilling on the easily inclined and difficultly drilled stratum and increasing the speed quickly further comprises a drill collar, and the drill collar is connected with one end, away from the straight screw power drilling tool, of the first stabilizer.
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Cited By (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876360A (en) * | 2022-04-14 | 2022-08-09 | 中国石油大学(华东) | New drilling tool assembly and drilling parameter optimization method based on vertical drilling system |
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