CN112576186B - Composite impact drilling speed-up tool - Google Patents
Composite impact drilling speed-up tool Download PDFInfo
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- CN112576186B CN112576186B CN201910932196.0A CN201910932196A CN112576186B CN 112576186 B CN112576186 B CN 112576186B CN 201910932196 A CN201910932196 A CN 201910932196A CN 112576186 B CN112576186 B CN 112576186B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B6/00—Drives for drilling with combined rotary and percussive action
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a composite impact drilling acceleration tool, which comprises: the conversion assembly comprises a first outer barrel and a transmission shaft, wherein the first outer barrel and the transmission shaft have a rotation speed difference; the impact assembly comprises a second outer cylinder fixedly connected with the first outer cylinder, a central shaft arranged in the second outer cylinder and an impact body, wherein the central shaft is fixedly connected with the transmission shaft; the torsion energy storage body is sleeved on the central shaft and can compress energy storage and release energy to form impact; the upper end of the torsion energy storage body is fixedly connected with the central shaft, the impact body is fixedly connected with the second outer cylinder in the circumferential direction, so that the torsion energy storage body and the impact body rotate relatively under the action of rotation speed difference to generate radial torsional impact on the impact body, and the torsion energy storage body and the impact body are constructed to form periodic axial impact on the impact body under the action of relative rotation, so that the torsion energy storage body can generate periodic axial and radial composite impact on the impact body and transmit the periodic axial and radial composite impact to the drill bit.
Description
Technical Field
The invention belongs to the technical field of oil and gas drilling engineering, and particularly relates to an underground tool in the oil and gas drilling engineering, in particular to a composite impact drilling speed-up tool.
Background
Drilling acceleration technology is an important topic in oil and gas well engineering. With the exploitation of oil and gas fields, oil and gas exploration gradually advances to the deep layer, and the requirements of oil and gas well engineering on drilling speed-up technologies and tools are more urgent. In the oil and gas drilling process, factors causing low drilling rate of a drilling machine are complex and various, wherein insufficient rock breaking energy and stick-slip vibration are important reasons causing low drilling rate of the drilling machine in the drilling process. When the PDC drill bit is drilled in a hard stratum, the drill bit stops rotating instantly due to insufficient rock breaking energy, at the moment, energy is gathered in a drill string, when the energy is gathered to a certain degree, the rock breaking energy is released instantly, the drill bit rotates in an overspeed manner, and the drill bit periodically generates stick-slip vibration, so that the service life of the drill bit is damaged, and the mechanical drilling speed is seriously influenced.
In order to increase the drilling rate of the drilling tool, many rotary and torsional impact tools have been developed to achieve increased drilling rates. Examples of impact rotary tools include hydraulic jet impactors, hydraulic impulse impactors, mechanical impactors, and the like. The hydraulic jet impactor utilizes a jet element to drive an impact hammer to generate impact load by changing the direction of underground drilling fluid. The hydraulic pulse impactor utilizes a valve disc closure or a hydraulic oscillation cavity to generate hydraulic pulse oscillation in the tool, and utilizes hydraulic impact load to drive an impact mechanism to generate impact load. The mechanical impactor uses a screw or a turbine as a rotary power source, and drives a hammer to generate impact load by using the rotation speed difference between a stator and a rotor. The torque impact tool mainly utilizes a jet element to drive a pendulum bob to generate radial impact, so that torque impact is realized.
However, current speed-up tools for downhole drilling still have some problems. For example, the existing drilling speed-up tools have relatively single function and insignificant speed-up effect, and the drilling speed-up tools can only generate one function of axial impact or radial impact, and the speed-up effect is limited in hard formations which are difficult to drill. In addition, the existing drilling speed-up tool has the defects of high failure rate, short service life and poor reliability.
Disclosure of Invention
In view of the above technical problems, the present invention is directed to a composite impact drilling speed increasing tool, which is driven by a rotary power source to generate a rotational speed difference and generate radial torsional impact to generate circumferential impact on a drill bit. Meanwhile, the speed-up tool can store energy and release energy to generate axial impact force, so that axial impact is formed on the drill bit. In addition, the speed-up tool can generate periodic axial and circumferential composite impact on the drill bit, obviously improves the mechanical rotating speed of drilling, and can obviously prolong the service life of the drill bit.
To this end, according to the present invention there is provided a composite percussion drilling acceleration tool comprising: the conversion assembly is used for being connected with a rotary power source of the drilling tool to provide rotary power and comprises a first outer barrel, a transmission shaft for transmitting torque is concentrically arranged in the first outer barrel, and a rotation speed difference exists between the first outer barrel and the transmission shaft; the impact assembly comprises a second outer cylinder fixedly connected with the first outer cylinder, a central shaft and an impact body, wherein the central shaft is concentrically arranged in the second outer cylinder and fixedly connected with the transmission shaft, and the lower end part of the central shaft is in dynamic sealing connection with the impact body; the torsion energy storage body is sleeved on the central shaft and can compress energy storage and release energy to form impact; the upper end of the torsion energy storage body is fixedly connected with the central shaft, the impact body is fixedly connected with the second outer cylinder in the circumferential direction, so that the torsion energy storage body and the impact body can rotate relatively under the action of the rotation speed difference to generate radial torsion impact on the impact body, and the torsion energy storage body and the impact body are constructed to enable the torsion energy storage body to periodically compress and store energy and release energy to form axial impact on the impact body under the action of relative rotation, so that the torsion energy storage body can generate periodic axial and radial composite impact on the impact body and transmit the periodic axial and radial composite impact to a drill bit.
In a preferred embodiment, the upper end portion of the torsional force energy storage body is fixedly connected with the central shaft in the circumferential direction through a rotation stopping pin.
In a preferred embodiment, the lower end surface of the torsion energy storage body is provided with first step teeth which are uniformly distributed in the circumferential direction, the upper end surface of the impact body is provided with second step teeth which can be matched with the first step teeth, the torsion energy storage body is in contact fit with the impact body through the first step teeth and the second step teeth, and the torsion energy storage body generates periodic axial impact on the impact body under the action of relative rotation.
In a preferred embodiment, the axial tooth heights of the first step tooth and the second step tooth are set within a range of 5-10mm, and the inclination angles of the circumferential meshing surfaces of the tooth shapes are set within a range of 10-20 °.
In a preferred embodiment, a wear-resistant layer is provided on the outer surface of the first stepped tooth and the second stepped tooth, and the thickness of the wear-resistant layer is set to be in the range of 3-5 mm.
In a preferred embodiment, the axial stiffness of the torsional force storing body is in the range of 0.5-4kN/mm and the radial spring stiffness is in the range of 0.1-1kN/°.
In a preferred embodiment, a part of the outer surface of the impact body is designed in the shape of a regular prism, and the corresponding inner wall area of the second outer cylinder is configured to be adapted to the surface of the regular prism, so that the impact body and the second outer cylinder are in a circumferentially fixed connection, so that the torque of the conversion assembly can be transmitted to the impact body via the second outer cylinder.
In a preferred embodiment, the transfer shaft is concentrically mounted within the first outer cylinder by a thrust bearing for centering the transfer shaft.
In a preferred embodiment, an annular sealed cavity is formed between the axial direction of the transmission shaft and the impact body and the radial direction of the central shaft and the second outer cylinder, the torsional energy storage body is arranged in the sealed cavity, and the sealed cavity is filled with sealing oil.
In a preferred embodiment, the end of the impact body is fixedly connected with a conversion joint for connecting a drill bit.
Drawings
The invention will now be described with reference to the accompanying drawings.
Fig. 1 shows the structure of a composite percussion drilling acceleration tool according to the present invention.
Fig. 2 showsbase:Sub>A cross-sectional view along the linebase:Sub>A-base:Sub>A in fig. 1.
Fig. 3 shows the structure of the torsional force energy storage body in the speed increasing tool shown in fig. 1.
Fig. 4 shows a cross-sectional view along the line B-B in fig. 1.
Fig. 5 shows the structure of the impact body in the speed increasing tool of fig. 1.
Fig. 6 to 10 show schematically a plan development of the tooth profiles between the torsional force storing body and the impact body and the meshing process of the tooth profiles.
In the present application, the drawings are schematic, merely illustrative of the principles of the invention, and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
In this application, it is noted that the end of the composite percussion drilling acceleration tool lowered into the wellbore near the wellhead is defined as the upper end or the like, and the end away from the wellhead is defined as the lower end or the like.
FIG. 1 shows the structure of a composite percussion drilling acceleration tool 100 according to the present invention. As shown in FIG. 1, the acceleration tool 100 includes a conversion assembly 110 and an impact assembly 120. The conversion assembly 110 is adapted to be fixedly coupled to a rotary power source (not shown) of the drilling tool to transfer rotary power generated by the rotary power source to the impact assembly 120. The source of rotational power includes, but is not limited to, a progressive cavity drill or a turbodrill. The impact assembly 120 is coupled to the conversion assembly 110 for converting the rotational power of the rotary power source into impact power for the drill bit. The impact assembly 120 is configured to periodically generate and transmit axial and circumferential impacts to the drill bit, thereby creating a composite multi-dimensional impact to the drill bit in both axial and circumferential directions. Therefore, the mechanical rotating speed of the well drilling is improved, the rock breaking construction efficiency of the well drilling is improved, and the rock breaking effect is enhanced.
According to the present invention, the conversion assembly 110 includes a first outer barrel 130. As shown in fig. 1, both ends of the first outer cylinder 130 are respectively configured as a positive tapered coupling button and a negative tapered coupling button. The first outer cylinder 130 is connected with other parts through a positive taper connecting buckle and a negative taper connecting buckle respectively. The structure of the first outer cylinder 130 facilitates installation and connection, and can ensure stability of connection between the first outer cylinder 130 and other components.
As shown in fig. 1, a transmission shaft 140 is provided inside the first outer cylindrical housing 130, and the transmission shaft 140 is concentrically arranged inside the first outer cylindrical housing 130. The transmission shaft 140 is used to transmit torque generated by the rotary power source. The transmission shaft 140 is configured as a hollow cylinder, and one end (upper end in fig. 1) of the transmission shaft 140 is configured as a trapezoidal connector, and a stepped portion is formed on an outer wall surface. A thrust bearing 150 is fitted over the transmission shaft 140, and the transmission shaft 140 is fitted into the first outer cylinder 130 via the thrust bearing 150, so that the transmission shaft 140 and the first outer cylinder 130 can rotate relative to each other. During operation, the thrust bearing 150 can center the transmission shaft 140, thereby ensuring smooth transmission of the transmission shaft 140. At the same time, the transfer shaft 140 enables axial pressure transfer to transfer upper weight-on-bit from top to bottom to the lower bit.
In the present embodiment, the thrust bearing 150 is provided with the adjusting rings at both axial ends thereof. One end of the adjusting ring at the upper end of the thrust bearing 150 is in contact with the shaft end of the thrust bearing 150, and the other end is seated on the stepped portion of the transfer shaft 140 to form an axial fixation. A first shoulder portion is provided on the inner wall of the lower end of the first outer cylinder 130, and one end of an adjustment ring of the lower end of the thrust bearing 150 is in contact with the thrust bearing 150, and the other end is seated on the first shoulder portion. The adjusting ring is made of brass or hard plastic. The adjustment ring enables adjustment of the axial installation length of the thrust bearing 150, thereby ensuring stability of the speed raising tool 100.
As shown in fig. 1, a cylindrical housing 101 is connected to the upper end of the first outer cylinder 130. The two ends of the casing 101 are configured as drill pipe buckles, and the casing 101 is connected with the negative taper connecting buckle at the upper end of the first outer cylinder 130 through the lower drill pipe buckle in a matching manner, so as to form a fixed connection with the first outer cylinder 130. A water cap 102 is provided inside the housing 101, the water cap 102 being arranged concentrically inside the housing 101, the water cap 102 being used for diversion of drilling fluid. The lower end of the water cap 102 is fixedly connected with the trapezoidal connecting buckle at the upper end of the transmission shaft 140. The conversion assembly 110 is connected with the rotary power source through the casing 101 and the water cap 102. Wherein, the upper end of the casing 101 is fixedly connected with the outer casing of the rotary power source (not shown) to make the casing 101 consistent with the rotating speed of the stator in the rotary power source, and the upper end of the water cap 102 is fixedly connected with the universal shaft (not shown) in the rotary power source to make the water cap 102 consistent with the rotating speed of the rotor in the rotary power source.
According to the present invention, the impact assembly 120 includes a second outer barrel 160, as shown in FIG. 1, the second outer barrel 160 is fixedly connected to the first outer barrel 130. In one embodiment, the upper end of the second outer cylinder 160 is configured as a negative taper connector, and the negative taper connector of the upper end of the second outer cylinder 160 is fitted with the positive taper connector of the lower end of the first outer cylinder 130, thereby forming a fixed connection.
As shown in FIG. 1, the impact assembly 120 further includes a central shaft 170. The central shaft 170 is concentrically disposed within the second outer cylinder 160 and has a generally hollow cylindrical shape. The upper end of the center shaft 170 is configured as a screw joint, and a second shoulder portion is provided on the inner wall of the upper end of the center shaft 170. The lower end surface of the transmission shaft 140 is seated on the second shoulder portion and is fixedly connected to the center shaft 170 by a threaded joint at the end of the center shaft 170.
According to the present invention, a torsion energy storage body 190 is sleeved on the central shaft 170. In one embodiment, the torsional force accumulator 190 is a rectangular torsion spring. The torsional force accumulator 190 has elastic stiffness in both the axial direction and the radial direction. The axial stiffness of the torsional force accumulator 190 is in the range of 0.5-4kN/mm, and the radial elastic stiffness is in the range of 0.1-1 kN/degree. When the pressure and the torsion are met, the length of the torsion energy storage body 190 can be contracted and the energy is stored. The upper end of the torsion energy storage body 190 and the upper end of the central shaft 170 are respectively and correspondingly provided with a rotation stopping pin hole 192 (see fig. 3), and the rotation stopping pin hole 192 is used for installing a rotation stopping pin 191. The upper end part of the torsion energy storage body 190 is fixedly connected with the central shaft 170 in the circumferential direction through a rotation stopping pin 191. As shown in fig. 2, 4 rotation stopping pins 191 are provided at regular intervals in the circumferential direction. The rotation stopping pin 191 can effectively ensure the stable connection between the torsion energy storage body 190 and the central shaft 170, thereby ensuring the synchronous rotation of the torsion energy storage body 190 and the central shaft 170. Thereby, the torque energy storage body 190 is made to coincide with the rotation speed of the rotor in the rotary power source.
According to the present invention, the lower end surface of the torsion energy accumulator 190 is provided with a first step tooth 193. As shown in fig. 3, the first step teeth 193 are uniformly distributed in the circumferential direction, and the tooth shape is streamline. The axial tooth height of the first step tooth 193 is set to be in the range of 5-10mm, and the inclination angle of the axially extending curve of the tooth profile is set to be in the range of 10-20 deg. The number of teeth of the first step teeth 193 is 4-6, and the axial compression frequency of the torque energy storage body 190 and the impact body 180 in one-cycle relative rotation can be adjusted by designing different numbers of teeth according to actual needs, so that the axial impact frequency can be adjusted. The function of the first step tooth 193 will be described later.
According to the present invention, an annular closed cavity is formed between the axial direction of the transmission shaft 130 and the impact body 180 (described below) and the radial direction of the central shaft 170 and the second outer tube 160, and the torsion energy accumulator 190 is disposed in the closed cavity and filled with sealing oil. The sealing oil can be used for lubricating and reducing abrasion of key impact parts of the torsion energy storage body 190 and the impact body 180, so that the impact abrasion between the torsion energy storage body 190 and the impact body 180 can be effectively reduced, and the service life of the speed increasing tool 100 is obviously prolonged. In order to ensure the sealing performance of the sealed cavity, sealing members are disposed between the impact body 180 and the second outer cylinder 160 and the central shaft 170. For example, a first seal ring is provided between the outer wall surface of the impact body 180 and the inner wall surface of the second outer tube 160, and a second seal ring is provided between the inner wall surface of the impact body 180 and the lower end outer wall surface of the center shaft 170.
According to the present invention, the impact assembly 120 further includes an impact body 180, the impact body 180 being disposed within the second outer barrel 160. The impact body 180 is formed in a hollow cylindrical shape, and the lower end of the central shaft 170 is coupled to the impact body 180, and the central shaft 170 and the impact body 180 are relatively movable in the axial direction. Thereby, the center shaft 170 and the impact body 180 are connected by a seal in a dynamic seal manner. As shown in fig. 4, a part of the outer surface of the impact body 180 is configured in a regular prism shape, and the corresponding inner wall area of the second outer cylinder 160 is configured to be capable of fitting with the regular prism-shaped surface of the impact body 180, so that the impact body 180 and the second outer cylinder 160 form a circumferential fixed connection, thereby enabling the impact body 180 to be consistent with the rotation speed of the stator in the rotary power source. In the exemplary embodiment shown in fig. 4, a part of the outer surface of the impact body 180 is designed in the shape of a regular hexagon. Thus, the upper weight and torque are transmitted to the impact body 180 through the second outer cylinder 160, and then transmitted to the drill bit through the impact body 180, so that the multi-dimensional impact generated by the impact assembly 120, which is combined in the axial direction and the radial direction, is transmitted to the drill bit, thereby increasing the mechanical rotation speed of the drill bit.
As shown in fig. 5, a second stepped tooth 193 capable of being fittingly coupled to the first stepped tooth 193 is provided on the upper end surface of the impact body 180. The torsional force energy storage body 190 and the impact body 180 are connected through the first step tooth 193 and the second step tooth 183. Therefore, through the matching connection of the first stepped tooth 193 and the second stepped tooth 183, the torsional energy storage body 190 can generate periodic axial movement under the action of relative rotation, and further form axial impact on the impact body 180.
In order to improve the wear resistance and impact resistance of the first and second stepped teeth 193 and 183, a wear-resistant layer is provided on the outer surfaces of the first and second stepped teeth 193 and 183, and the thickness of the wear-resistant layer is set to be in the range of 3-5 mm. In one embodiment, the wear resistant layer is made of cemented carbide. The hard alloy is preferably sprayed on the impact parts of the first stepped tooth 193 and the second stepped tooth 183, so that the wear resistance and the impact resistance of the key impact parts are improved, the reliability of the speed-increasing tool 100 is enhanced, and the service life of the speed-increasing tool 100 is obviously prolonged.
In the present embodiment, a stepped portion is provided outside the lower end of the impact body 180. The impact body 180 is disposed inside the second outer tube 160, and a drop-preventing nut 181 is installed at an end of the second outer tube 160 to prevent the impact body 180 from dropping. In the normal drilling process, the gap between the step of the impact body 180 and the drop-proof nut 181 is in the range of 5-20 mm. And under the working condition that no bit pressure exists at the drill bits such as tripping and the like, the step part of the impact body 180 is in contact fit with the falling-prevention nut 181, so that the impact body 180 is prevented from falling.
As shown in fig. 1, a conversion joint 200 is connected to a lower end of the impact body 180, and the conversion joint 200 is used to connect a drill. In one embodiment, the impact body 180 is fixedly connected to the adapter 200 by a screw thread. The adapter 200 is effective to ensure that the impact body 180 is coupled to the drill bit, thereby transmitting the combined axial and radial impacts generated by the speed-up tool 100 to the drill bit.
In the actual working process, the torsion energy storage body 190 is driven by the rotation power source to rotate at a high speed, so as to generate circumferential torsional impact on the impact body 180. The torsion energy storage body 190 is axially contracted after being subjected to circumferential torsion impact, and at the moment, the torsion energy storage body 190 and the impact body 180 are in contact fit through the first step teeth 193 and the second step teeth 183 to form streamline sliding surface contact. Therefore, during the relative rotation, the torsion energy storage body 190 is compressed to store energy until the torsion energy storage body 190 is separated from the impact body 180 to release energy so as to generate axial impact on the impact body 180, so that the impact body 180 is periodically subjected to axial and radial impact, and thus, axial and radial composite multi-dimensional impact is formed.
The operation of the composite percussion drilling acceleration tool 100 according to the present invention is briefly described below. Firstly, the speed-up tool 100 is lowered to the borehole construction stratum, after the drilling fluid flows into the drilling tool, the water cap 102, the transmission shaft 140 and the central shaft 170 synchronously rotate with the rotor in the rotary power source under the driving of the rotary power source, and the torque energy storage body 190 is driven to rotate, so that the rotating speed of the torque energy storage body 190 is consistent with the rotating speed of the rotor in the rotary power source. The housing 101, the first outer cylinder 130, the second outer cylinder 160, and the impact body 180 are integrally connected to an outer housing of a stator in the rotary power source to be rotated in synchronization, so that the rotational speed of the impact body 180 coincides with the rotational speed of the stator in the rotary power source. As a result, the torsional force energy storage body 190 and the impact body 180 are brought into impact contact with each other due to the difference in the rotational speeds of the rotor and the stator. The torque energy storage body 190 generates radial torsional impact to the impact body 180 under the driving of the rotary power source, thereby providing radial torsional impact energy for the drill bit. When the torsional impact occurs, the torsional energy storage body 190 is shortened and stored under the action of the reverse torque. At this time, the streamlined first stepped tooth 193 of the lower end surface of the torsion energy storage body 190 gradually engages with the streamlined second stepped tooth 183 of the upper end surface of the impact body 180 and relatively rotates, so that the torsion energy storage body 190 is axially compressed, and when the torsion energy storage body 190 and the impact body 180 rotate to the moment of disengagement, the energy gathered by the torsion energy storage body 190 is instantaneously released, and axial impact is generated on the impact body 180, thereby providing axial impact energy for the drill bit. Therefore, under the action of relative rotation, the torsion energy storage body 190 periodically generates axial and radial impact on the impact body 180, so that axial and radial composite multidimensional impact is formed on the drill bit, the mechanical rotating speed of the drill bit is obviously improved, and the construction efficiency of the drilling tool is greatly improved.
Fig. 6 to 10 schematically show the development of the tooth profiles of the first step tooth 193 and the second step tooth 183, thereby showing the rotational meshing process of the tooth profiles of the first step tooth 193 and the second step tooth 183. As shown in fig. 6 to 10, it is assumed that fig. 6 shows an initial state when the acceleration tool 100 is at a certain time. With the relative rotation between the torque energy storage body 190 and the impact body 180, as shown in fig. 7, the first stepped tooth 193 is completely engaged with the engagement surface of the second stepped tooth 183, and at this time, the torque energy storage body 190 generates a radial impact on the impact body 180. Relative rotation continues, as shown in fig. 8, the torsional force accumulator 190 is torsionally contracted and lifted up, and at this time, the first stepped tooth 193 is partially engaged with the engagement surface of the second stepped tooth 183. As shown in fig. 9, when the torque energy storage body 190 contracts to a certain extent, at this time, the meshing surface of the first stepped tooth 193 and the second stepped tooth 183 is engaged with each other at the top, so that the torque energy storage body 190 moves to the highest point in the axial direction. Then, as shown in fig. 10, the torque energy storage body 190 and the impact body 180 continue to rotate relatively under the action of the rotation speed difference until the tooth top of the torque energy storage body 190 meshes with the tooth bottom of the impact body 180, and at this time, the torque energy storage body 190 generates axial impact on the impact body 180. During operation, the torsional energy storage body 190 and the impact body 180 continuously rotate relatively under the action of the rotary power source, so that the torsional energy storage body 190 generates periodic torsional impact and axial impact on the impact body 180, and thus the acceleration drilling tool 100 forms axial and radial composite multi-dimensional impact on the drill bit.
The composite impact drilling acceleration tool 100 according to the present invention can generate radial torsional impact under the driving of a rotary power source to generate radial impact on a drill bit. Meanwhile, the speed-up tool 100 can shorten energy storage through the torsion energy storage body 190 and release the energy storage to generate axial impact force so as to form axial impact on the drill bit, so that periodic axial and radial impact is generated on the drill bit, composite multidimensional impact is realized, and the mechanical rotation speed of the drilling tool is obviously improved. The speed-up tool 100 adopts mechanical impact, the generated impact frequency and impact power are stably output, the working requirement of the deep well and ultra-deep well bottom in high-temperature environment can be met, and the applicability is strong. In addition, a closed cavity filled with sealing oil is arranged in the internal impact assembly 120, and a wear-resistant layer is arranged on the impact surface, so that the wear resistance and impact resistance of the key impact part of the torsion energy storage body 190 and the impact body 180 are greatly improved, the reliability of the speed-up tool 100 is effectively improved, and the service life of the speed-up tool 100 is obviously prolonged.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A composite percussion drilling acceleration tool comprising:
a conversion assembly (110) for connection with a source of rotational power for a drilling tool to provide rotational power, comprising a first outer barrel (130) within which a transmission shaft (140) for transmitting torque is concentrically arranged, a rotational speed difference existing between the first outer barrel and the transmission shaft;
the impact assembly (120) is used for generating impact force and comprises a second outer cylinder (160) fixedly connected with the first outer cylinder, a central shaft (170) and an impact body (180), wherein the central shaft is concentrically arranged in the second outer cylinder and fixedly connected with the transmission shaft, and the lower end part of the central shaft is in dynamic sealing connection with the impact body; and
a torsion energy storage body (190) sleeved on the central shaft, wherein the torsion energy storage body can compress energy storage and release energy to form impact;
wherein the upper end of the torsion energy storage body is fixedly connected with the central shaft, the impact body is fixedly connected with the second outer cylinder in the circumferential direction, so that the torsion energy storage body and the impact body can relatively rotate under the action of the rotation speed difference to generate radial torsion impact on the impact body,
the torsion energy storage body and the impact body are constructed to be capable of enabling the torsion energy storage body to periodically compress for energy storage and release energy to form axial impact on the impact body under the action of relative rotation, first step teeth (193) are uniformly distributed in the circumferential direction on the lower end face of the torsion energy storage body, second step teeth (183) capable of being matched with the first step teeth are arranged on the upper end face of the impact body, the torsion energy storage body is in contact fit with the impact body through the first step teeth and the second step teeth, and under the action of relative rotation, the first step teeth and the second step teeth are gradually meshed and relatively rotate, so that the torsion energy storage body can generate periodic axial and radial composite impact on the impact body and transmit the periodic axial and radial composite impact to a drill bit.
2. The speed increasing tool as claimed in claim 1, characterized in that the upper end portion of the torsional force energy accumulating body forms a circumferential fixed connection with the central shaft by a rotation stop pin (191).
3. The speed increasing tool as claimed in claim 1, wherein the axial tooth heights of the first step tooth and the second step tooth are set within a range of 5-10mm, and the inclination angles of the circumferential engaging surfaces of the tooth shapes are set within a range of 10 ° -20 °.
4. The speed increasing tool as claimed in claim 3, wherein a wear resistant layer is provided on the outer surface of the first and second stepped teeth, the wear resistant layer being provided to a thickness in the range of 3-5 mm.
5. Acceleration tool according to claim 1 or 2, characterized in, that the axial stiffness of the torsional force energy storing body is in the range of 0.5-4kN/mm and the radial spring stiffness is in the range of 0.1-1kN/°.
6. The speed increasing tool according to claim 1 or 2, wherein a part of the outer surface of the impact body is configured in a regular prism shape, and the corresponding inner wall area of the second outer cylinder is configured to be adaptable to the regular prism-shaped surface, so that the impact body is in a circumferentially fixed connection with the second outer cylinder, so that the torque of the conversion assembly can be transmitted to the impact body through the second outer cylinder.
7. The speed increasing tool according to claim 1, wherein the transfer shaft is concentrically mounted within the first outer cylinder by a thrust bearing (150) for centering the transfer shaft.
8. The speed increasing tool according to claim 1, wherein an annular sealed cavity is formed between the axial direction of the transmission shaft and the impact body and the radial direction of the central shaft and the second outer cylinder, the torsion energy storage body is arranged in the sealed cavity, and the sealed cavity is filled with sealing oil.
9. The speed tool according to claim 1, characterized in that an adapter (200) for connection to a drill bit is fixedly connected to the end of the impact body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910932196.0A CN112576186B (en) | 2019-09-29 | 2019-09-29 | Composite impact drilling speed-up tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910932196.0A CN112576186B (en) | 2019-09-29 | 2019-09-29 | Composite impact drilling speed-up tool |
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| CN112576186A CN112576186A (en) | 2021-03-30 |
| CN112576186B true CN112576186B (en) | 2023-03-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104847259B (en) * | 2015-04-13 | 2017-03-15 | 中国石油大学(华东) | A kind of power drilling tool rotary impact speed enhancing apparatus |
| US10502006B2 (en) * | 2015-09-18 | 2019-12-10 | Ulterra Drilling Technologies, L.P. | Rotary impact tool |
| CN105421996B (en) * | 2015-11-23 | 2018-05-08 | 西南石油大学 | The drilling tool of compound action broken rock is produced using the mode of spinning |
| CN105239929A (en) * | 2015-11-24 | 2016-01-13 | 西南石油大学 | Downhole tool for achieving efficient rock breaking through spin vibration |
| CN106150349B (en) * | 2016-07-14 | 2018-09-14 | 山东大东联石油设备有限公司 | A kind of circumferential direction axial vacuum impact speed-raising tool |
| CN206409188U (en) * | 2017-01-24 | 2017-08-15 | 长江大学 | A kind of composite impact device |
| CN207315221U (en) * | 2017-09-26 | 2018-05-04 | 中国石油天然气集团公司 | Magnetic force energy-storage type rotary drilling impactor |
| CN108104714A (en) * | 2018-02-08 | 2018-06-01 | 西南石油大学 | Differential torsion impact device based on screw rod and gear |
| CN108915583B (en) * | 2018-06-25 | 2019-11-19 | 北京工业大学 | Mechanical composite impact drilling speed tool |
| CN208734274U (en) * | 2018-07-17 | 2019-04-12 | 中石化石油工程技术服务有限公司 | One kind is spun screw drive axle assembly |
| CN109681114B (en) * | 2018-12-21 | 2023-09-01 | 武汉亿斯达工具有限公司 | Bidirectional high-frequency torsion impactor applied to PDC drill bit acceleration |
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