CN108060896B - Mechanical downhole tool for realizing vertical drilling by utilizing screw cam - Google Patents
Mechanical downhole tool for realizing vertical drilling by utilizing screw cam Download PDFInfo
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- CN108060896B CN108060896B CN201810069334.2A CN201810069334A CN108060896B CN 108060896 B CN108060896 B CN 108060896B CN 201810069334 A CN201810069334 A CN 201810069334A CN 108060896 B CN108060896 B CN 108060896B
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- 238000005553 drilling Methods 0.000 title claims abstract description 48
- 238000012937 correction Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 30
- 230000005540 biological transmission Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 11
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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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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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/003—Bearing, sealing, lubricating details
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/04—Electric drives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a mechanical underground tool for realizing vertical drilling by utilizing a screw cam, which consists of a motor assembly, a universal shaft assembly and an inclination correction assembly. The front end of the motor assembly is connected with the universal shaft assembly, the front end of the universal shaft assembly is connected with the inclination correction assembly, in the drilling process, when the inclination occurs, the heavier side of the eccentric sleeve automatically rotates to the lower side of the well under the action of gravity to drive the connecting rod seat to rotate, so that the connecting rod a and the connecting rod b are always positioned at the upper side of the well, the motor assembly converts liquid energy into rotary mechanical energy to drive the central tube to rotate, and the roller seat synchronously rotates along with the central tube to enable the cam to reciprocate up and down, so that the connecting rod a and the connecting rod b are driven to continuously push the well wall to generate a periodical reaction force to correct the inclination, and normal drilling is realized. The mechanical downhole tool for realizing vertical drilling by utilizing the screw cam can effectively correct well deviation and ensure the precision of vertical drilling, thereby improving the drilling efficiency and the track quality of a borehole and saving the production cost.
Description
Technical Field
The invention relates to a downhole tool for petroleum drilling, in particular to a mechanical downhole tool for realizing vertical drilling by utilizing a screw cam.
Background
The anti-oblique drilling and the quick drilling of the straight well section have important roles in improving the mechanical drilling speed of deep wells, ultra-deep wells and wells with various complex structures and guaranteeing the underground safety, and the vertical drilling technology is rapidly developed and applied along with the continuous increase of the deep wells and the ultra-deep wells. In recent years, with the rapid development and application of the steering drilling technology, the vertical drilling technology has also made great progress on the basis of the traditional fast anti-whipping theory and technology.
The technology of preventing the steering drilling tool from being inclined and fast can realize the purpose of opening a turntable to drill a straight well (stable inclination) and directional correction. The steering drill is a downhole motor assembly with single or double bend housing and stabilizer. When the rotating speed of the rotary table is smaller, the actual rotating speed of the drill bit is the sum of the output rotating speed of the screw drilling tool and the rotating speed of the rotary table, and then a stable inclined well section can be drilled; once the well deviation occurs and the well deviation needs to be corrected, the operation can be performed in an oriented mode. The anti-tilting drilling tool combination is limited by the mechanism, mainly is a stable tilting tool, the tilting characteristic is second, and in addition, the tilting characteristic is greatly reduced in a slim hole because of enough deformation space required for reaching the expected deformation requirement. In such a technical need, anti-tilting technology of the anti-pendulum drilling tool assembly has been developed, which on the one hand shows a sufficiently strong tilting-down capability; on the other hand, the application in small well bores still has good declivity effect. The pre-bending dynamics anti-diagonal drilling technology generates larger declination force in the dynamics behavior of a well bore, and simultaneously eliminates the declination force caused by uneven bit direction, thereby achieving the purpose of anti-diagonal drilling, and preliminary experiments prove that the technology is effective and is also urgently needed on site. However, these anti-whipping technologies have limitations, and the application conditions are very single, so that the technology cannot be widely applied, and the effect is not ideal under some environments with severe terrains.
Disclosure of Invention
In order to solve the problems of low drilling efficiency, high drilling cost and overlong drilling period caused by the well deviation condition caused by stratum factors and technical reasons in the vertical well drilling operation process in the background technology, the invention provides a mechanical downhole tool for realizing vertical drilling by utilizing a screw cam.
The technical scheme of the invention is as follows: the mechanical underground tool for realizing vertical drilling by utilizing the screw cam consists of a motor assembly, a universal shaft assembly and an inclination correction assembly, wherein the front end of the motor assembly is connected with the universal shaft assembly, and the front end of the universal shaft assembly is connected with the inclination correction assembly; the motor assembly comprises an upper connector, an anti-falling lock nut, an anti-falling connecting rod, a stator shell, a rubber bushing and a screw rotor, wherein the upper connector is connected with the stator shell through threads; the universal shaft assembly comprises a movable winch, a ball seat, a driving ball, a bearing ball, a sealing ring a, a locking sleeve, a sealing sleeve, a universal shaft connecting rod, a universal shaft shell, a water cap and a transmission shaft, wherein the ball seat is arranged in the movable winch; the skew correction assembly comprises a sealing ring, a central tube, a sealing ring b, a bearing a, a roller seat, a roller, a screw a, a bias sleeve, a cam cover outer ring, a screw b, a cam cover inner ring, a spring seat, a pin a, a pin b, a connecting rod seat, a spherical hinge, a connecting rod a, a roller, a cylindrical pin, a hinge pin, a connecting rod b, a sleeve, a bearing c and a lower joint, wherein the roller is arranged on the roller seat through the screw a, the spherical hinge is arranged at the bottom of the cam through the cam cover outer ring, the screw b and the cam cover inner ring, the connecting rod seat is fixed on the bearing b, the bearing a, the roller seat is fixed on the central tube through threads, the spring seat is fixed on the central tube through the pin b, the roller is arranged at the right end of the connecting rod b through the cylindrical pin, the connecting rod a is connected with the connecting rod b through the hinge pin, the connecting rod b is connected with the lower end of the spherical hinge, the sealing ring and the sealing ring b are arranged on the bearing b in advance, the bearing a is sleeved on the bias sleeve, the bearing a is connected with the bearing b through the bias sleeve through the roller seat and the bearing b through the bearing b, and the bearing b is connected with the front end through the screw b, and the transmission shaft is connected with the front end of the center tube through the screw b.
The mechanical downhole tool for realizing vertical drilling by utilizing the screw cam in the scheme is characterized in that: the middle lower part of the heavier side of the eccentric sleeve is provided with a sleeve pin hole in the circumferential center, a connecting rod telescopic opening is formed at a position 180 degrees away from the circumference of the sleeve pin hole, a connecting rod a and a connecting rod b can be telescopic through the connecting rod telescopic opening, and the upper end and the lower end of the eccentric sleeve are provided with sealing grooves for placing sealing rings; the connecting rod seat pin hole on the connecting rod seat is 180 degrees away from the mounting position of the connecting rod b in the circumferential direction, and the pin a is connected with the sleeve pin hole and the connecting rod seat pin hole, so that the connecting rod a and the connecting rod b are always opposite to the connecting rod telescopic opening on the eccentric sleeve.
The mechanical downhole tool for realizing vertical drilling by utilizing the screw cam in the scheme is characterized in that: the bottom of the cam is provided with an annular chute, the cam, the outer ring of the cam cover and the inner ring of the cam cover form an annular slideway, the spherical hinge can rotate around the cam in the annular slideway in the circumferential direction, and lubricating grease is coated in the annular chute before installation; the right end of the connecting rod b is provided with a roller, so that the sliding friction between the drilling tool and the well wall is changed into rolling friction, and the working resistance is reduced.
The beneficial effects of the invention are as follows: (1) The well deviation is sensed in real time by adopting the unbalance principle, the sensing is sensitive, the reaction is rapid, and the dynamic deviation correction is carried out; (2) The cam and four-bar mechanism are utilized to realize the inclination correction working principle of the tool, and the tool has novel structure, theoretical research value and possibility of further development and perfection; (3) The motor assembly of the tool does not generate axial pressure, has high energy conversion efficiency and short axial dimension; (4) The invention is of a purely mechanical structure, does not comprise an electromagnetic measuring component and a high-pressure oil system, and has stable working performance and low cost.
Drawings
Fig. 1 is a schematic view of a mechanical downhole tool with a vertical drilling mechanism using a screw cam in an extended state.
Fig. 2 is a schematic view of the mechanical downhole tool linkage a and linkage b in a retracted state using a screw cam to achieve vertical drilling according to the present invention.
FIG. 3 is a cross-sectional view A-A of FIG. 1 in accordance with the present invention.
FIG. 4 is an enlarged view of part of I of FIG. 1 in accordance with the present invention.
Fig. 5 is a three-dimensional schematic view of the roller mount, roller and cam structure.
Fig. 6 is a three-dimensional schematic view of the cam, cam cap inner ring and cam cap outer ring construction.
Fig. 7 is a three-dimensional schematic of a linkage mechanism.
Fig. 8 is a three-dimensional schematic of a biased sleeve structure.
In the figure, the upper joint, the 2-falling-preventing locking nut, the 3-falling-preventing connecting rod, the 4-stator shell, the 5-rubber bushing, the 6-screw rotor, the 7-movable hinge, the 8-ball seat, the 9-transmission ball, the 10-bearing ball, the 11-sealing ring a, the 12-locking sleeve, the 13-sealing sleeve, the 14-universal shaft connecting rod, the 15-universal shaft shell, the 16-water cap, the 17-transmission shaft, the 18-sealing ring, the 19-central tube, the 20-sealing ring b, the 21-bearing a, the 22-roller seat, the 23-roller, the 24-screw a, the 25-eccentric sleeve, the 26-cam, the 27-cam cover outer ring, the 28-screw b, the 29-cam cover inner ring, the 30-spring, the 31-spring seat, the 32-pin a, the 33-pin b, the 34-connecting rod seat, the 35-ball hinge, the 36-connecting rod a, the 37-roller, the 38-cylindrical pin, the 39-hinge pin, the 40-connecting rod b, the 41-bearing b, the 42-sleeve, the 43-bearing c and the 44-lower joint are shown.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a mechanical downhole tool for realizing vertical drilling by utilizing a screw cam consists of a motor assembly, a universal shaft assembly and an inclination correction assembly, wherein the front end of the motor assembly is connected with the universal shaft assembly, and the front end of the universal shaft assembly is connected with the inclination correction assembly; the motor assembly comprises an upper connector 1, an anti-falling lock nut 2, an anti-falling connecting rod 3, a stator shell 4, a rubber bushing 5 and a screw rotor 6, wherein the upper connector 1 is connected with the stator shell 4 through threads, the rear end of the anti-falling connecting rod 3 is connected with the anti-falling lock nut 2, the front end of the anti-falling connecting rod is connected with the screw rotor 6, the rubber bushing 5 is arranged inside the stator shell 4 to form a screw stator, and the screw rotor 6 and the screw stator are mutually meshed.
The universal shaft assembly comprises a movable hinge 7, a ball seat 8, a driving ball 9, a pressure-bearing ball 10, a sealing ring a11, a locking sleeve 12, a sealing sleeve 13, a universal shaft connecting rod 14, a universal shaft shell 15, a water cap 16 and a transmission shaft 17, wherein the ball seat 8 is arranged in the movable hinge 7, the pressure-bearing ball 10 is arranged on the ball seat 8, the driving ball 9 is arranged in a groove at the end part of the universal shaft connecting rod 14, the universal shaft connecting rod 14 is matched with the movable hinge 7 through the locking sleeve 12, the inside of the movable hinge 7 is sealed through the sealing ring a11 and the sealing sleeve 13, the two ends of the universal shaft connecting rod 14 are identical in installation structure, the rear end of the universal shaft shell 15 is connected with a stator shell 4, the rear end of the water cap 16 is connected with the movable hinge 7, and the front end of the water cap 16 is connected with the transmission shaft 17.
The deflection assembly comprises a sealing ring 18, a central tube 19, a sealing ring b20, a bearing a21, a roller seat 22, a roller 23, a screw a24, a deflection sleeve 25, a cam 26, a cam cover outer ring 27, a screw b28, a cam cover inner ring 29, a spring 30, a spring seat 31, a pin a32, a pin b33, a connecting rod seat 34, a spherical hinge 35, a connecting rod a36, a roller 37, a cylindrical pin 38, a hinge pin 39, a connecting rod b40, a bearing b41, a sleeve 42, a bearing c43 and a lower joint 44, wherein the roller 23 is arranged on the roller seat 22 through the screw a24, the spherical hinge 35 is arranged at the bottom of the cam 26 through the cam cover outer ring 27, the screw b28 and the cam cover inner ring 29, the connecting rod seat 34 is fixed on the bearing b41, the bearing a21, the roller seat 22, the cam 26, the springs 30, the spring 31, the bearing b41, the sleeve 42 and the bearing c43 are arranged on the central tube 19 in sequence from top to bottom, the roller seat 22 is fixed on the central tube 19 by means of threads, the pin b33 is fixed on the central tube 19 by means of the spring seat 37, the roller 37 is connected with the connecting rod seat 40 through the pin b40, the spherical hinge pin 40 is arranged at the end of the bearing b40 and the spherical hinge 35 and the lower end of the bearing 25 by the spherical hinge 25, the bearing seat 40 is connected with the spherical sleeve 25 by the spherical hinge 25 by the bearing seat 25 and the spherical hinge 25, the bearing seat 25 is connected with the spherical sleeve 25 by the spherical hinge seat 25 and the spherical seat 25 by the bearing seat 25, and the bearing seat 25 is connected with the lower end by the bearing seat 25 in the front and the lower joint; in the drilling process, when well deviation occurs, the heavier side of the eccentric sleeve 25 automatically rotates to the lower side of the well hole through a bearing a21 and a bearing c43 under the action of gravity to drive a connecting rod seat 34 to rotate, so that a connecting rod a36 and a connecting rod b40 are always positioned at the upper side of the well hole, the motor assembly converts liquid energy into rotary mechanical energy to drive a central tube 19 to rotate, and the roller seat 22 synchronously rotates along with the central tube 19 to enable a cam 26 to reciprocate up and down, so that the connecting rod a36 and the connecting rod b40 are driven to continuously push to the well wall to generate a periodical reaction force to correct the well deviation, normal drilling is realized, and the drilling efficiency is improved; when no well deviation occurs, the bias of the biased casing 25 is random, so the automatic vertical drilling tool will not generate a constant side of the correction force, and will not affect normal drilling.
The middle lower part of the heavier side of the eccentric sleeve 25 is provided with a sleeve pin hole in the circumferential center, a connecting rod telescopic opening is formed at a position 180 degrees away from the circumference of the sleeve pin hole, a connecting rod a36 and a connecting rod b40 can be telescopic through the connecting rod telescopic opening, and the upper end and the lower end of the eccentric sleeve 25 are provided with sealing grooves for placing sealing rings 18; the connecting rod seat pin hole on the connecting rod seat 34 is 180 degrees away from the mounting position of the connecting rod b40 in the circumferential direction, and the pin a32 is connected with the sleeve pin hole and the connecting rod seat pin hole, so that the connecting rod a36 and the connecting rod b40 are always opposite to the connecting rod telescopic opening on the eccentric sleeve 25.
An annular chute is formed in the bottom of the cam 26, the cam cover outer ring 27 and the cam cover inner ring 29 form a slideway, the spherical hinge 35 can rotate around the cam 26 in the circumferential direction in the slideway, and lubricating grease is coated in the annular chute before installation; the right end of the connecting rod b40 is provided with a roller 37, so that the sliding friction between the drilling tool and the well wall is changed into rolling friction, and the working resistance is reduced.
Claims (3)
1. Utilize screw cam to realize mechanical type downhole tool of vertical drilling, its characterized in that: the mechanical downhole tool for realizing vertical drilling by utilizing the screw cam consists of a motor assembly, a universal shaft assembly and an inclination correction assembly, wherein the front end of the motor assembly is connected with the universal shaft assembly, and the front end of the universal shaft assembly is connected with the inclination correction assembly; the motor assembly comprises an upper connector (1), an anti-falling lock nut (2), an anti-falling connecting rod (3), a stator shell (4), a rubber bushing (5) and a screw rotor (6), wherein the upper connector (1) is connected with the stator shell (4) through threads, the rear end of the anti-falling connecting rod (3) is connected with the anti-falling lock nut (2), the front end of the anti-falling connecting rod is connected with the screw rotor (6), the rubber bushing (5) is arranged inside the stator shell (4) to form a screw stator, and the screw rotor (6) and the screw stator are mutually meshed; the universal shaft assembly comprises a movable winch (7), a ball seat (8), a transmission ball (9), a pressure-bearing ball (10), a sealing ring a (11), a locking sleeve (12), a sealing sleeve (13), a universal shaft connecting rod (14), a universal shaft shell (15), a water cap (16) and a transmission shaft (17), wherein the ball seat (8) is arranged in the movable winch (7), the pressure-bearing ball (10) is arranged on the ball seat (8), the transmission ball (9) is arranged in a groove at the end part of the universal shaft connecting rod (14), the universal shaft connecting rod (14) is matched with the movable winch (7) through the locking sleeve (12), the inside of the movable winch (7) is sealed through the sealing ring a (11) and the sealing sleeve (13), the installation structures at two ends of the universal shaft connecting rod (14) are identical, the rear end of the universal shaft shell (15) is connected with the stator shell (4), the rear end of the water cap (16) is connected with the movable winch (7), and the front end of the water cap is connected with the transmission shaft (17). The skew correction assembly comprises a sealing ring (18), a central tube (19), a sealing ring b (20), a bearing a (21), a roller seat (22), a roller (23), a screw a (24), a bias sleeve (25), a cam (26), a cam cover outer ring (27), a screw b (28), a cam cover inner ring (29), a spring (30), a spring seat (31), a pin a (32), a pin b (33), a connecting rod seat (34), a spherical hinge (35), a connecting rod a (36), a roller (37), a cylindrical pin (38), a hinge pin (39), a connecting rod b (40), a bearing b (41), a sleeve (42), a bearing c (43) and a lower joint (44), wherein the roller (23) is mounted on the roller seat (22) through a screw a (24), the spherical hinge (35) is mounted on the bottom of the cam (26) through the cam cover outer ring (27), the screw b (28) and the cam cover inner ring (29), the connecting rod seat (34) is fixed on the bearing b (41), and the bearing a (21), the roller seat (22), the cam seat (26), the spring seat (30), the bearing c (43) and the bearing b (41) are sequentially mounted from top to bottom The sleeve (42) and the bearing c (43) are arranged on the central tube (19), the roller seat (22) is fixed on the central tube (19) by means of threads, the spring seat (31) is fixed on the central tube (19) by means of the pin b (33), the roller (37) is arranged on the right end of the connecting rod b (40) by means of the cylindrical pin (38), the connecting rod a (36) is connected with the connecting rod b (40) by means of the hinge pin (39), the connecting rod a (36) is connected with the lower end of the spherical hinge (35), the connecting rod b (40) is connected with the connecting rod seat (34), the sealing ring (18) and the sealing ring b (20) are arranged on the eccentric sleeve (25) in advance, the eccentric sleeve (25) is sleeved on the bearing a (21) and the bearing c (43), the connecting rod seat (34) is fixed on the eccentric sleeve (25) by means of the pin a (32), the rear end of the central tube (19) is connected with the transmission shaft (17) by means of threads, and the front end of the central tube is connected with the lower joint (44) by means of threads; the connecting rod seat pin hole on the connecting rod seat (34) is 180 degrees away from the mounting position of the connecting rod b (40) in the circumferential direction, and the pin a (32) is connected with the sleeve pin hole and the connecting rod seat pin hole, so that the connecting rod a (36) and the connecting rod b (40) are always opposite to the connecting rod telescopic opening on the eccentric sleeve (25); an annular chute is formed in the bottom of the cam (26), an outer ring (27) of the cam cover and an inner ring (29) of the cam cover form an annular slideway, the spherical hinge (35) can rotate around the cam (26) in the annular slideway in the circumferential direction, and lubricating grease is coated in the annular chute before installation; in the drilling process, when well deviation occurs, the heavier side of the eccentric sleeve (25) automatically rotates to the lower side of a well hole through a bearing a (21) and a bearing c (43) under the action of gravity, a connecting rod seat (34) is driven to rotate, so that a connecting rod a (36) and a connecting rod b (40) are always positioned at the upper side of the well hole, the motor assembly converts liquid energy into rotary mechanical energy, a central tube (19) is driven to rotate, a roller seat (22) synchronously rotates along with the central tube (19) to enable a cam (26) to reciprocate up and down, and accordingly the connecting rod a (36) and the connecting rod b (40) are driven to continuously push to the well wall to generate a periodical reaction force to correct the well deviation, normal drilling is realized, and the drilling efficiency is improved.
2. The mechanical downhole tool for vertical drilling with a screw cam of claim 1, wherein: the middle lower part of the heavier side of the eccentric sleeve (25) is provided with a sleeve pin hole in the circumferential center, a connecting rod telescopic opening is formed at a position 180 degrees away from the circumference of the sleeve pin hole, the connecting rod a (36) and the connecting rod b (40) can be telescopic through the connecting rod telescopic opening, and the upper end and the lower end of the eccentric sleeve (25) are provided with sealing grooves for placing the sealing rings (18).
3. The mechanical downhole tool for vertical drilling with a screw cam of claim 1, wherein: the right end of the connecting rod b (40) is provided with a roller (37), so that the sliding friction between the drilling tool and the well wall is changed into rolling friction, and the working resistance is reduced.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810069334.2A CN108060896B (en) | 2018-01-24 | 2018-01-24 | Mechanical downhole tool for realizing vertical drilling by utilizing screw cam |
| PCT/CN2018/082585 WO2019144507A1 (en) | 2018-01-24 | 2018-04-10 | Mechanical downhole tool for vertical well drilling using screw cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810069334.2A CN108060896B (en) | 2018-01-24 | 2018-01-24 | Mechanical downhole tool for realizing vertical drilling by utilizing screw cam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108060896A CN108060896A (en) | 2018-05-22 |
| CN108060896B true CN108060896B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810069334.2A Active CN108060896B (en) | 2018-01-24 | 2018-01-24 | Mechanical downhole tool for realizing vertical drilling by utilizing screw cam |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108060896B (en) |
| WO (1) | WO2019144507A1 (en) |
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| CN108756732B (en) * | 2018-08-02 | 2023-11-14 | 西南石油大学 | Circumferential impactor based on screw and spring |
| CN110630189B (en) * | 2019-09-30 | 2024-05-10 | 中信重工机械股份有限公司 | Reducing guide of drilling tool |
| CN111677449B (en) * | 2020-08-11 | 2020-12-01 | 中煤科工集团西安研究院有限公司 | Underground hydraulic pressurizing rotary directional screw drill tool for coal mine |
| CN111852358B (en) * | 2020-08-25 | 2024-03-19 | 重庆科技学院 | Multi-branch yield-increasing drilling Cheng Pahang tool |
| CN112065280A (en) * | 2020-09-29 | 2020-12-11 | 山西风雷钻具有限公司 | Vertical drilling tool |
| CN113027341B (en) * | 2021-04-12 | 2022-04-05 | 西安石油大学 | Adjustable screw anti-drag tool for coiled tubing drilling and adjusting method |
| CN113585968B (en) * | 2021-06-25 | 2024-06-07 | 北京六合伟业科技股份有限公司 | Non-contact pushing type vertical guiding system for rib and well wall |
| CN116464390B (en) * | 2023-04-04 | 2023-09-15 | 中国地质大学（北京） | Mechanical type correction system suitable for polar region ice layer hot melt drilling tool |
| CN116607908B (en) * | 2023-07-20 | 2023-09-29 | 北京汉诺威自控技术有限公司 | Polished rod structure |
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| GB0509316D0 (en) * | 2005-05-06 | 2005-06-15 | Sondex Ltd | A steering apparatus for a steerable drilling tool |
| CN2851503Y (en) * | 2005-10-09 | 2006-12-27 | 中国石油大学(北京) | Hydraulic automatic anti-deflection drilling tools |
| CN201254952Y (en) * | 2008-04-22 | 2009-06-10 | 中国石化集团胜利石油管理局钻井工艺研究院 | Automatic vertical drilling tool by utilizing aerodynamics |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB617740A (en) * | 1945-11-02 | 1949-02-10 | Randolph Knox Whitehead | Improvements in re-directing deflected bore holes |
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2018
- 2018-01-24 CN CN201810069334.2A patent/CN108060896B/en active Active
- 2018-04-10 WO PCT/CN2018/082585 patent/WO2019144507A1/en active Application Filing
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| GB0509316D0 (en) * | 2005-05-06 | 2005-06-15 | Sondex Ltd | A steering apparatus for a steerable drilling tool |
| CN2851503Y (en) * | 2005-10-09 | 2006-12-27 | 中国石油大学(北京) | Hydraulic automatic anti-deflection drilling tools |
| CN201254952Y (en) * | 2008-04-22 | 2009-06-10 | 中国石化集团胜利石油管理局钻井工艺研究院 | Automatic vertical drilling tool by utilizing aerodynamics |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019144507A1 (en) | 2019-08-01 |
| CN108060896A (en) | 2018-05-22 |
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