CN110259388B - An adaptive omnidirectional variable-angle PDC bit tooth for alleviating rock-to-tooth impact force - Google Patents
An adaptive omnidirectional variable-angle PDC bit tooth for alleviating rock-to-tooth impact force Download PDFInfo
- Publication number
- CN110259388B CN110259388B CN201910533064.0A CN201910533064A CN110259388B CN 110259388 B CN110259388 B CN 110259388B CN 201910533064 A CN201910533064 A CN 201910533064A CN 110259388 B CN110259388 B CN 110259388B
- Authority
- CN
- China
- Prior art keywords
- ball
- drill bit
- tooth
- angle
- pdc
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 31
- 238000005520 cutting process Methods 0.000 claims abstract description 60
- 238000004806 packaging method and process Methods 0.000 claims abstract description 41
- 239000011435 rock Substances 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 abstract description 12
- 230000015572 biosynthetic process Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 7
- 238000005755 formation reaction Methods 0.000 description 5
- 230000036346 tooth eruption Effects 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
Images
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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- 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
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
-
- 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
- E21B12/00—Accessories for drilling tools
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)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
本发明涉及一种减缓岩石对齿冲击力的自适应全向变角PDC钻头齿，属于钻井工程装备领域；该齿包括切削元件、支撑件、全向转动球、半止动环、圆锥销、滚珠支撑座、封装盒、滚珠集合和弹性缓冲环；所述的滚珠支撑座的内部放置有滚珠集合，滚珠支撑座上放置弹性缓冲环，弹性缓冲环上安装全向转动球，全向转动球上焊接支撑件和切削元件，滚珠支撑座、半止动环被套装在封装盒内；所述的自适应全向变角PDC钻头齿安装在钻头上的个数至少大于等于一，至多等于钻头齿槽个数；采用该发明能够实现PDC齿空间切削角度的全面可调，增强PDC齿的地层自适应能力和抗冲击性，延长钻头寿命，提高钻井效率。
The invention relates to an adaptive omnidirectional variable-angle PDC drill bit tooth for reducing the impact force of rock on the tooth, belonging to the field of drilling engineering equipment; A ball support seat, a packaging box, a ball collection and an elastic buffer ring; the ball support seat is provided with a ball collection, an elastic buffer ring is placed on the ball support seat, and an omnidirectional rotating ball is installed on the elastic buffer ring, and the omnidirectional rotating ball The upper welding support and cutting element, the ball support seat and the half stop ring are sheathed in the packaging box; the number of the self-adaptive omnidirectional variable angle PDC drill bit teeth installed on the drill bit is at least greater than or equal to one, at most equal to the drill bit The number of tooth slots; the invention can realize the comprehensive adjustment of the space cutting angle of the PDC teeth, enhance the formation adaptive ability and impact resistance of the PDC teeth, prolong the life of the drill bit, and improve the drilling efficiency.
Description
The technical field is as follows:
the invention relates to a self-adaptive omni-directional variable angle PDC drill bit tooth for slowing down impact force of rock on the tooth, and belongs to the field of drilling engineering equipment.
Background art:
the PDC drill bit is the main drilling equipment in oil and gas exploration and development, more than 85% of oil and gas drilling footage in China is completed by the PDC drill bit, the drilling efficiency and the service life of the PDC drill bit are integrally improved, and the PDC drill bit has important significance for reducing the production cost, improving the economic benefit, improving the technical level of the exploration and development equipment and guaranteeing the national energy safety.
The PDC teeth are main cutting elements of the PDC drill bit, and the quality of the teeth directly determines the overall rock breaking performance of the drill bit. However, the impact damage of the PDC teeth has become one of the major bottlenecks that restrict the further development of the PDC drill bit, and particularly, in the drilling process of complex strata such as soft and hard staggered formations, the PDC teeth are easily damaged by impact, variable load and other loads, which seriously affects the drilling efficiency.
In response to the above problems, many researchers have developed PDC teeth and drill bit designs that can mitigate impact forces. In the utility model 'diamond bit with flexible cutting structure' (application number: 2001820353452.1), a buffering cutting module with buffering function is disclosed, which mainly installs a buffer part between the bit body and the cutting element, and uses a bolt or a screw to connect the bit body, the cutting element and the buffer part, and reduces the impact force of the PDC tooth by means of the buffer part; in the utility model 'cutting teeth with vibration damping function and diamond bit using the same' (application number: 2001820353860.7), a cutting teeth with vibration damping function is disclosed, which mainly comprises a central tooth, a base and an elastic element, wherein the elastic element is arranged below the central tooth base body, thus improving the impact resistance of the cutting teeth; in the invention patent 'adaptive limiting tooth control unit and drill bit for inhibiting stick-slip vibration of drilling tool' (application number: 2001810605624.4), the vibration of the drill bit can be effectively eliminated by means of elastic extension and retraction of the limiting teeth, and a certain buffering effect is achieved.
However, in the prior art including the above-mentioned patent, the included angle between the cutting face of the cutting element and the formation is always constant, which is inconsistent with the design rule that the harder the formation, the greater the included angle of the tooth face to the normal of the cutting face (in the field of PDC bit design, this angle is referred to as the rake angle), which causes two problems: firstly, because the angle of a cutting plane is always unchanged, the buffering capacity on impact force is limited, and PDC teeth are still likely to be impacted and damaged under certain limit complex stratum conditions; secondly, because the angle of the cutting plane is not changed, the self-adaptive angle adjustment can not be carried out aiming at different stratums, and the rapid abrasion or the failure of the PDC teeth are easily caused.
In order to further enhance the impact resistance of the PDC teeth and improve the self-adaptive stratum capability of the PDC teeth, based on the design principle that the included angle between the tooth surface and the normal direction of the cutting surface is larger as the stratum is harder, the self-adaptive omnidirectional angle-changing PDC drill bit teeth for slowing down the impact force of rocks on the teeth are provided, so that the cutting angle of the PDC teeth can be comprehensively adjusted, the stratum self-adaptive capability and the impact resistance of the PDC teeth are enhanced, the service life of the drill bit is prolonged, and the drilling efficiency is improved.
The invention content is as follows:
the invention provides a self-adaptive omnidirectional angle-variable PDC drill bit tooth for slowing down impact force of rock on the tooth, and aims to solve the problems that the conventional buffer structure of the PDC drill bit tooth cannot realize adjustment of the cutting angle of the tooth surface of the PDC tooth, so that the buffer capacity of the PDC tooth is limited, a stratum self-adaptive angle adjusting function is not provided, and the PDC tooth is easy to wear quickly, and is damaged by impact and invalid. By adopting the method, the cutting angle can be adjusted in a self-elastic buffer manner according to the hardness degree or the local load condition of the stratum in the rock breaking process of the PDC bit, the adaptability and impact resistance of the cutting bit to the stratum are enhanced, and the service life and drilling efficiency of the PDC bit can be further improved.
The technical scheme adopted by the invention for realizing the purpose is as follows:
the invention relates to a self-adaptive omnidirectional angle-variable PDC drill bit tooth for slowing down the impact force of rock on the tooth, which comprises a cutting element, a supporting piece, an omnidirectional rotating ball, a semi-stop ring, a taper pin, a ball supporting seat, a packaging box, a ball set and an elastic buffer ring, wherein the cutting element is arranged on the support piece; the ball bearing assembly is placed in the ball bearing support seat, the elastic buffer ring is placed on the ball bearing support seat, the omnidirectional rotating ball is installed on the elastic buffer ring, the support piece is welded on the omnidirectional rotating ball, the support piece and the cutting element are welded into a whole, two half stop rings are installed on the outer side of the ball bearing support seat, the packaging box is sleeved on the half stop rings, and the half stop rings, the ball bearing support seat and the packaging box are connected through conical pins; the adaptive omnidirectional angle-variable PDC drill bit teeth are arranged in the tooth grooves of the drill bit, and the installation number of the adaptive omnidirectional angle-variable PDC drill bit teeth is at least more than or equal to one and at most equal to the number of the tooth grooves of the drill bit.
The cutting element and the support have the same size and shape, and the shape of the cutting element and the support comprises a circle, an ellipse, a cone, a polygon or a combination of the circle, the ellipse, the cone and the polygon.
The omnidirectional rotating ball is formed by six curved surfaces of an upper end surface, an upper ball surface, a convex ring stop surface, a convex ring outer ball surface, a convex ring elastic matching surface and a lower ball surface;
the semi-stop ring consists of a ball pair stop surface, a deflection angle stop surface and a middle pin hole;
the ball bearing support seat consists of an outer curved surface, a support ring, an inner curved surface and an inner pin hole;
the inner structure of the packaging box is a hollow cylinder with a bottom, a packaging pin hole is formed in the outer side surface of the packaging box, and the cross section of the packaging box is circular, oval or polygonal; the bottom surface of the package is in a shape of a circle, an ellipse, a polygon, a sphere, an ellipsoid or a polygonal pyramid;
the ball set consists of n spherical balls, wherein n is more than or equal to 3;
the elastic buffer ring is formed by four curved surfaces in a surrounding mode and is respectively an outer side surface, a lower side surface, an upper side surface and an inner side surface.
A support piece is welded on the upper end face of the omnidirectional rotating ball; the upper ball body surface is matched with the ball pair stop surface; the convex ring outer spherical surface is matched with the outer curved surface; the elastic matching surface of the convex ring is matched with the upper side surface; the lower ball surface is connected with the ball set to form a rolling pair; when the cutting element has the maximum deflection angle, the convex ring stop surface is coincided with the deflection angle stop surface;
the outer side surface of the elastic buffer ring is matched with the outer curved surface, the lower side surface of the elastic buffer ring is matched with the support ring, and the inner side surface of the elastic buffer ring is matched with the lower spherical surface;
a ball set is placed on the inner curved surface of the ball support seat to form a rolling pair;
the packaging outer side face and the packaging bottom face are in direct contact with a tooth groove of the drill bit, and the section of the packaging box and the shape of the packaging bottom face are determined by the shape of the tooth groove so as to ensure the installation of teeth;
the taper pin passes through the packaging pin hole, the middle pin hole and the inner pin hole in sequence to fasten the packaging box, the semi-stop ring and the ball support seat.
The combination mode of the self-adaptive omnidirectional variable-angle PDC drill bit teeth and the drill bit comprises welding, embedding, bonding, threads or a machine clamp;
the type of the drill bit comprises a PDC drill bit or a composite drill bit consisting of the PDC drill bit, a roller bit, a laser drill bit and a diamond drill bit;
the types of cutting teeth mounted on the drill bit include adaptive omni-directional variable angle PDC drill bit teeth, or a combination of adaptive omni-directional variable angle PDC drill bit teeth and rounded, elliptical, wedge, tapered, spherical, and curved teeth.
Compared with the prior art, the invention has the following advantages:
1. the spherical pair is arranged in the self-adaptive omnidirectional variable-angle PDC drill bit tooth, the original single movement adjusting mode is broken through, the rotation adjustment is realized, the cutting posture adjustment is more flexible, the range is larger, the self-adaptive PDC drill bit tooth can be more suitable for complex stratum environments, and the self-adaptive capacity to the stratum is strong;
2. the elastic buffer ring and the ball pair are arranged in the self-adaptive omnidirectional variable-angle PDC drill bit teeth, so that the energy storage and release at any position of the tooth blades around the PDC are realized, the impact force on the cutting element can be relieved in a targeted manner, and the impact damage of the teeth is reduced;
3. the size of the cutting angle of the self-adaptive omnidirectional variable-angle PDC drill bit tooth can be self-adaptively adjusted according to the hardness degree of a stratum, so that a cutting edge of a cutting element has good cutting posture and stress condition when cutting local hard rock, and the wear rate of the PDC tooth is reduced;
4. because the self-adaptive omnidirectional variable-angle PDC drill bit tooth has the characteristics of strong impact resistance, relatively low abrasion rate and good self-adaptive capacity to stratum, the self-adaptive capacity of the drill bit provided with the tooth to the stratum is enhanced, the service life of the drill bit is prolonged, and the drilling efficiency is improved.
Description of the drawings:
FIG. 1 is an exploded view of an adaptive omni-directional variable angle PDC bit tooth for mitigating rock-to-tooth impact force provided by an embodiment of the present invention;
FIG. 2 is a general assembly view of an adaptive omni-directional variable angle PDC drill bit tooth for mitigating rock-to-tooth impact force provided by an embodiment of the invention;
FIG. 3 is a three-dimensional schematic view of an omnidirectional rotating ball;
FIG. 4 is a three-dimensional schematic view of a semi-stop ring;
FIG. 5 is a cross-sectional view of the ball support seat;
FIG. 6 is a three-dimensional schematic view and a front view of the enclosure;
FIG. 7 is a schematic diagram of a bottom surface type of a package;
FIG. 8 is a three-dimensional schematic view of a collection of balls;
FIG. 9 is a cross-sectional and top view of an elastomeric cushion ring;
FIG. 10 is a schematic and close-up view of a drill bit with adaptive omni-directional variable angle PDC bit teeth installed;
FIG. 11 is a schematic diagram of the operation of an adaptive omni-directional variable angle PDC bit tooth;
FIG. 12 is a schematic view of a PDC bit and a composite bit with adaptive omni-directional variable angle PDC bit teeth installed.
In the figure: 1. the method comprises the steps of self-adaptive omni-directional variable angle PDC drill bit teeth; 101. a body axis; 102. a cutting axis; 11. a cutting element; 111. a cutting edge; 12. a support member; 13. an omnidirectional rotating ball; 130. an upper end surface; 131. putting the spherical surface; 132. a convex ring stop surface; 133. a convex ring outer spherical surface; 134. a convex ring elastic matching surface; 135. a lower sphere surface; 14 a semi-stop ring; 141. a ball set stop surface; 142. a declination stop surface; 143. a middle pin hole; 15. a taper pin; 16. a ball bearing support seat; 161. an outer curved surface; 162. a support ring; 163. an inner curved surface; 164. an inner pin hole; 17. packaging the box; 171. packaging the pin holes; 172. a bottom surface of the package; 1721. a circular shape; 1722. an oval shape; 1723. a polygon; 1724. spherical; 1725. an ellipsoid shape; 1726. a polygonal pyramid; 173. packaging the outer side surface; 18. ball collection; 181. a spherical ball; 19. an elastic buffer ring; 191. an outer side surface; 192. a lower side surface; 193. an upper side surface; 194. an inner side surface; 2. local hard rock; 3. a drill bit; 31. a blade; 311. a tooth socket; 32. a cone.
The specific implementation method comprises the following steps:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings:
basic example 1:
as shown in fig. 1, 2 and 9, the adaptive omni-directional variable angle PDC drill bit tooth for reducing impact force of rock on the tooth of the invention comprises a cutting element 11, a support 12, an omni-directional rotating ball 13, a semi-stop ring 14, a taper pin 15, a ball bearing seat 16, a packaging box 17, a ball assembly 18 and an elastic buffer ring 19; a ball set 18 is placed in the ball support base 16, an elastic buffer ring 19 is placed on the ball support base 16, an omnidirectional rotating ball 13 is mounted on the elastic buffer ring 19, a support member 12 is welded on the omnidirectional rotating ball 13, the support member 12 and the cutting element 11 are welded into a whole, two half stop rings 14 are mounted on the outer side of the ball support base 16, a packaging box 17 is sleeved on the half stop rings 14, and the half stop rings 14, the ball support base 16 and the packaging box 17 are connected by virtue of conical pins 15; the adaptive omnidirectional angle-changing PDC drill bit teeth 1 are arranged in tooth grooves 311 of the drill bit 3, and the installation number of the adaptive omnidirectional angle-changing PDC drill bit teeth 1 is at least more than or equal to one and at most equal to the number of the tooth grooves 311 of the drill bit 3.
The cutting element 11 and the support 12 have the same size and shape, and the shape of the cutting element 11 and the support 12 includes a circle, an ellipse, a cone, a polygon or a combination thereof.
As shown in fig. 3, the omnidirectional rotating ball 13 is defined by six curved surfaces, namely an upper end surface 130, an upper ball surface 131, a convex ring stop surface 132, a convex ring outer ball surface 133, a convex ring elastic matching surface 134 and a lower ball surface 135;
as shown in fig. 4, the half stop ring 14 is composed of a ball stop surface 141, an offset angle stop surface 142, and a middle pin hole 143;
as shown in fig. 5, the ball bearing seat 16 is composed of an outer curved surface 161, a support ring 162, an inner curved surface 163 and an inner pin hole 164;
as shown in fig. 6, the inner structure of the packaging box 17 is a hollow cylinder with a bottom, a packaging pin hole 171 is formed on the packaging outer side surface 173, and the cross-sectional shape of the packaging box 17 is circular, oval or polygonal; as shown in fig. 7(a) - (h), the package bottom surface 172 is circular 1721, elliptical 1722, polygonal 1723, spherical 1724, ellipsoidal 1725, or polygonal pyramid 1726 in shape;
as shown in FIG. 8, the ball set 18 is composed of n spherical balls 181, n is greater than or equal to 3;
as shown in fig. 9, the elastic buffer ring 19 is defined by four curved surfaces, namely, an outer surface 191, a lower surface 192, an upper surface 193, and an inner surface 194.
The upper end surface 130 of the omnidirectional rotating ball 13 is welded with the support 12; the upper ball surface 131 cooperates with the ball stop surface 141; the convex ring outer spherical surface 133 is matched with the outer curved surface 161; the convex ring elastic mating surface 134 is matched with the upper side surface 193; the lower ball surface 135 is connected with the ball assembly 18 to form a rolling pair; at the maximum deflection angle of cutting element 11, collar stop surface 132 coincides with deflection angle stop surface 142;
the outer side surface 191 of the elastic buffer ring 19 is matched with the outer curved surface 161, the lower side surface 192 is matched with the support ring 162, and the inner side surface 194 is matched with the lower spherical surface 135;
the ball set 18 is placed on the inner curved surface 163 of the ball support seat 16 to form a rolling pair;
the packaging outer side surface 173 and the packaging bottom surface 172 are in direct contact with the tooth grooves 311 of the drill bit 3, and the cross section of the packaging box 17 and the shape of the packaging bottom surface 172 are determined by the shape of the tooth grooves 311 so as to ensure the installation of teeth;
the taper pin 15 passes through the packaging pin hole 171, the middle pin hole 143 and the inner pin hole 164 in sequence to fasten the packaging box 17, the semi-stop ring 14 and the ball bearing support 16.
As shown in fig. 10, the bonding manner of the adaptive omni-directional variable angle PDC bit tooth 1 and the bit 3 includes welding, embedding, bonding, threading or mechanical clamping;
the type of the drill bit 3 comprises a PDC drill bit or a composite drill bit consisting of the PDC drill bit, a roller bit, a laser drill bit and a diamond drill bit;
the cutting tooth types installed on the drill bit 3 include an adaptive omni-directional variable angle PDC bit tooth 1, or a combination of the adaptive omni-directional variable angle PDC bit tooth 1 and a circular tooth, an elliptical tooth, a wedge tooth, a tapered tooth, a spherical tooth, and a curved tooth.
Example 2: assembly process of adaptive omnidirectional variable-angle PDC drill bit tooth 1
The invention relates to an assembly process of a self-adaptive omnidirectional angle-variable PDC drill bit tooth for reducing impact force of rock on the tooth, which comprises the following steps: firstly, the ball assembly 18 is placed on the inner curved surface 163 of the ball bearing seat 16, then the elastic buffer ring 19 is placed on the support ring 162 of the ball bearing seat 16, then the omnidirectional rotating ball 13 welded with the cutting element 11 and the support 12 is placed on the elastic buffer ring 19, the two half stop rings 14 are respectively buckled on the outer sides of the ball bearing seat 16, finally the packaging box 17 is sleeved, and the cutting teeth are locked by the conical pin 15, so that the self-adaptive omnidirectional angle-changing PDC drill bit tooth 1 is formed as shown in FIG. 2 or FIG. 11.
Example 3: working principle of teeth
As shown in fig. 11, the adaptive omnidirectional angle-variable PDC drill bit tooth 1 for reducing impact force of rock on the tooth of the present invention mainly relies on the cutting element 11 to scrape and cut broken rock, and the principle of omni-directional angle-variable, impact force reduction, and adaptive angle-variable adjustment according to the hardness and hardness of the formation is as follows:
omnidirectional angle change: the omnidirectional rotating ball 13 and the ball assembly 18 form a rolling pair between the ball assembly 18 and the ball support base 16, so that the omnidirectional rotating ball 13 and the ball support base 16 realize omnidirectional rotation, and the cutting element 11 can carry out space angle-changing adjustment;
impact force is relieved: in medium soft formations, the cutting angle of the adaptive omni-directional variable angle PDC bit tooth 1 does not change or changes little, and the body axis 101 and the cutting axis 102 of the cutting element 11 are basically coincident at this time, as shown in fig. 11 (a); when the local hard rock 2 is suddenly encountered, as shown in fig. 11(b) - (d), the omnidirectional rotating ball 13 welded with the cutting element 11 and the support 12 rotates towards the direction of the hard rock, and part of energy caused by the impact force of the local hard rock is stored in the elastic buffer ring 19 of the adaptive omnidirectional variable angle PDC bit tooth 1, so that the load on the cutting element 11 is reduced, and the impact is reduced;
thirdly, the self-adaptation to the soft and hard degree of the stratum is realized: the structural design of the omnidirectional rotating ball 13 realizes the omnidirectional angle change of the cutting element 11, the angle can be represented as an included angle between the body axis 101 and the cutting axis 102, the size of the included angle is comprehensively determined by the hardness degree of the stratum and the elastic modulus of the elastic element 19, the direction of the included angle is determined by the contact position of the local hard rock 2 and the cutting element 11, when the elastic modulus of the elastic element 19 is determined, the included angle is increased along with the increase of the crushing strength of the local hard rock 2, and the included angle between the tooth surface and the normal direction of the cutting surface is larger as the stratum is harder, so that the cutting edge 111 of the cutting element 11 has good cutting posture and stress condition when cutting the local hard rock 2, and the capability of self-adapting to the hardness degree of the stratum is strong.
Example 4: drill bit 3 formed to include adaptive omni-directional variable angle PDC bit teeth 1
The type of the drill bit 3 comprises a PDC drill bit or a composite drill bit consisting of the PDC drill bit, a roller cone drill bit, a laser drill bit and a diamond drill bit. As shown in fig. 12(a), in order to fabricate the adaptive PDC bit 1, the PDC bit 1 is fabricated, and as shown in fig. 12(b), the PDC bit 1 is fabricated on the blades 31 of the bit, and combined with the cone 32 to form a composite bit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A self-adaptive omni-directional variable angle PDC drill bit tooth for relieving impact force of rock on the tooth comprises a cutting element (11), a support piece (12), an omni-directional rotating ball (13), a semi-stop ring (14), a conical pin (15), a ball support seat (16), a packaging box (17), a ball set (18) and an elastic buffer ring (19); a ball set (18) is placed in the ball support seat (16), an elastic buffer ring (19) is placed on the ball support seat (16), an omnidirectional rotating ball (13) is mounted on the elastic buffer ring (19), a support piece (12) is welded on the omnidirectional rotating ball (13), the support piece (12) and a cutting element (11) are welded into a whole, two half stop rings (14) are mounted on the outer side of the ball support seat (16), a packaging box (17) is sleeved on the half stop rings (14), and the half stop rings (14), the ball support seat (16) and the packaging box (17) are connected through a conical pin (15); the adaptive omnidirectional angle-changing PDC drill bit teeth (1) are arranged in tooth grooves (311) of the drill bit (3), the installation number of the adaptive omnidirectional angle-changing PDC drill bit teeth (1) is at least one, and the number of the adaptive omnidirectional angle-changing PDC drill bit teeth (1) is at most equal to the number of the tooth grooves (311) of the drill bit (3);
the omnidirectional rotating ball (13) is formed by surrounding six surfaces of an upper end surface (130), an upper ball body surface (131), a convex ring stopping surface (132), a convex ring outer ball surface (133), a convex ring elastic matching surface (134) and a lower ball body surface (135);
the semi-stop ring (14) consists of a ball pair stop surface (141), a deflection angle stop surface (142) and a middle pin hole (143):
the ball bearing support seat (16) consists of an outer curved surface (161), a support ring (162), an inner curved surface (163) and an inner pin hole (164);
the inner structure of the packaging box (17) is a hollow column with a bottom, a packaging pin hole (171) is formed in the packaging outer side surface (173), and the cross section of the packaging box (17) is circular, oval or polygonal; the bottom surface (172) of the package is in the shape of a circle (1721), an ellipse (1722), a polygon (1723), a sphere (1724), an ellipsoid (1725) or a polygonal pyramid (1726);
the ball set (18) consists of n spherical balls (181), wherein n is more than or equal to 3;
the elastic buffer ring (19) is formed by surrounding four surfaces, namely an outer side surface (191), a lower side surface (192), an upper side surface (193) and an inner side surface (194);
the upper end face (130) of the omnidirectional rotating ball (13) is welded with a support piece (12); the upper sphere surface (131) is matched with the ball pair stop surface (141); the convex ring outer spherical surface (133) is matched with the outer curved surface (161); the convex ring elastic matching surface (134) is matched with the upper side surface (193); the lower ball surface (135) is connected with the ball assembly (18) to form a rolling pair; the collar stop surface (132) coincides with the rake stop surface (142) when the cutting element (11) has a maximum rake angle;
the outer side surface (191) of the elastic buffer ring (19) is matched with the outer curved surface (161), the lower side surface (192) is matched with the support ring (162), and the inner side surface (194) is matched with the lower spherical surface (135);
a ball set (18) is placed on an inner curved surface (163) of the ball support seat (16) to form a rolling pair;
the taper pin (15) penetrates through the packaging pin hole (171), the middle pin hole (143) and the inner pin hole (164) in sequence to fasten the packaging box (17), the semi-stop ring (14) and the ball bearing support seat (16).
2. The adaptive omni-directional variable angle PDC bit tooth that mitigates rock-to-tooth impact force of claim 1, wherein: the cutting element (11) and the support (12) have the same size and shape, and the shape of the cutting element (11) and the support (12) comprises a circle, an ellipse, a cone, a polygon or a combination of the circle, the ellipse, the cone and the polygon.
3. The adaptive omni-directional variable angle PDC bit tooth that mitigates rock-to-tooth impact force of claim 1, wherein: the combination mode of the self-adaptive omnidirectional variable-angle PDC drill bit tooth (1) and the drill bit (3) comprises welding, embedding, bonding, threads or a machine clamp;
the type of the drill bit (3) comprises a PDC drill bit or a composite drill bit consisting of the PDC drill bit and one of a roller cone drill bit, a laser drill bit and a diamond drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533064.0A CN110259388B (en) | 2019-06-19 | 2019-06-19 | An adaptive omnidirectional variable-angle PDC bit tooth for alleviating rock-to-tooth impact force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910533064.0A CN110259388B (en) | 2019-06-19 | 2019-06-19 | An adaptive omnidirectional variable-angle PDC bit tooth for alleviating rock-to-tooth impact force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110259388A CN110259388A (en) | 2019-09-20 |
| CN110259388B true CN110259388B (en) | 2021-03-09 |
Family
ID=67919449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910533064.0A Expired - Fee Related CN110259388B (en) | 2019-06-19 | 2019-06-19 | An adaptive omnidirectional variable-angle PDC bit tooth for alleviating rock-to-tooth impact force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110259388B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324485B (en) * | 2022-10-17 | 2022-12-23 | 成都迪普金刚石钻头有限责任公司 | An Adaptive PDC Composite Drill Bit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2149251C1 (en) * | 1998-02-11 | 2000-05-20 | Моржаретто Альберт Александрович | Drilling bit |
| CN103635654A (en) * | 2011-04-26 | 2014-03-12 | 史密斯国际有限公司 | Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s) |
| CN203808836U (en) * | 2014-03-25 | 2014-09-03 | 湖南工业大学 | Detachable and angle-adjustable cutting tooth assembly for roller bit |
| CN105019833A (en) * | 2015-07-21 | 2015-11-04 | 吉林大学 | Bionic adaptive PDC drill bit |
| CN207829819U (en) * | 2018-02-10 | 2018-09-07 | 西南石油大学 | A kind of low torque diamond bit suitable for hard formation drilling |
| CN109128284A (en) * | 2018-11-12 | 2019-01-04 | 南京林业大学 | A kind of PCB numerical control drilling machine borehole drill construction and its aligning device |
-
2019
- 2019-06-19 CN CN201910533064.0A patent/CN110259388B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2149251C1 (en) * | 1998-02-11 | 2000-05-20 | Моржаретто Альберт Александрович | Drilling bit |
| CN103635654A (en) * | 2011-04-26 | 2014-03-12 | 史密斯国际有限公司 | Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s) |
| CN203808836U (en) * | 2014-03-25 | 2014-09-03 | 湖南工业大学 | Detachable and angle-adjustable cutting tooth assembly for roller bit |
| CN105019833A (en) * | 2015-07-21 | 2015-11-04 | 吉林大学 | Bionic adaptive PDC drill bit |
| CN207829819U (en) * | 2018-02-10 | 2018-09-07 | 西南石油大学 | A kind of low torque diamond bit suitable for hard formation drilling |
| CN109128284A (en) * | 2018-11-12 | 2019-01-04 | 南京林业大学 | A kind of PCB numerical control drilling machine borehole drill construction and its aligning device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110259388A (en) | 2019-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110273650B (en) | Diamond bit with flexible cutting structure | |
| CN110185399B (en) | An omnidirectional variable-angle PDC bit for reducing the impact force of rock breaking | |
| CN102268961B (en) | Screw drill transmission shaft assembly with vibration reduction function | |
| KR101691341B1 (en) | Excavation tool | |
| CN110159202B (en) | Diamond bit with fixed buffer structure | |
| WO2022227731A1 (en) | Diamond drill bit having self-adaptive cushioning module | |
| CN110145241B (en) | A low torque diamond drill bit suitable for drilling in hard formations | |
| CN205895148U (en) | Roll and protect footpath PDC drill bit | |
| CN110259388B (en) | An adaptive omnidirectional variable-angle PDC bit tooth for alleviating rock-to-tooth impact force | |
| CN208106331U (en) | Combined type diamond bit with slew buffer structure | |
| CN110359852A (en) | Combined type diamond bit with fixed buffer structure | |
| CN103233683B (en) | Device for correcting well wall and enhancing drill gauge protection effect through rolling | |
| CN208137861U (en) | A kind of diamond bit with flexible cutting structure | |
| CN207829819U (en) | A kind of low torque diamond bit suitable for hard formation drilling | |
| CN110359856A (en) | Combined type diamond bit with slew buffer structure | |
| CN208137865U (en) | Cutting tooth with vibration-damping function and the diamond bit using the cutting tooth | |
| CN106368615A (en) | Compound drill bit with steering wheel disc | |
| CN207829817U (en) | A kind of low torque diamond bit | |
| CN212927724U (en) | Long-life module cutting tooth and PDC drill bit adopting same | |
| CN221462244U (en) | PDC drill bit with oversized rake cutting teeth | |
| CN111236851A (en) | Long-life module cutting tooth and PDC drill bit adopting same | |
| CN211448522U (en) | Composite drill bit with independent cutting structure at core part | |
| CN211343501U (en) | Fixing device for long-shaft deep-well pump | |
| CN206174873U (en) | Composite drill bit with turn to rim plate | |
| CN113550698B (en) | Drill resonance isolation shielding tool, working method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210309 |