阅读说明：本技术 一种井下涡轮驱动实现井底钻头高频增压的钻井提速装置 (Drilling speed-increasing device for realizing high-frequency pressurization of downhole drill bit by downhole turbine driving ) 是由 李东平 周宝义 韩国猛 张海军 魏俊 张伟 廖华林 郝晨 汪晓敏 曲永林 史玉才 于 2020-11-06 设计创作，主要内容包括：本发明公开了一种井下涡轮驱动实现井底钻头高频增压的钻井提速装置,该装置包括上接头、涡轮马达系统、壳体、轴用弹性挡圈、下扶正轴承、运动转换装置、半圆卡环、花键套和钻头,提速装置以井下钻井液驱动涡轮马达高速旋转,带动滚轮支架和滚轮随同涡轮轴一起旋转,滚轮在正弦导轨上做周期性滚动,挤压正弦导轨使其形成周期性轴向振动,该振动能量作用在钻头上,可周期性地向钻头施加钻压。本发明装置在其整个工作过程中可在井底实现钻头增压,提高机械钻速,延长钻头工作寿命,可增加大斜度井、水平井、分支井等钻进工程中的单次钻进深度。(The invention discloses a drilling speed-up device for realizing high-frequency pressurization of a well bottom drill bit through underground turbine driving, which comprises an upper joint, a turbine motor system, a shell, an elastic retainer ring for a shaft, a lower centralizing bearing, a motion conversion device, a semicircular snap ring, a spline sleeve and a drill bit. The device can realize the pressurization of the drill bit at the well bottom in the whole working process, improve the mechanical drilling speed, prolong the working life of the drill bit and increase the single drilling depth in drilling projects of highly deviated wells, horizontal wells, branch wells and the like.)

1. The utility model provides a drilling speed-increasing device that turbine drive realized shaft bottom drill bit high frequency pressure boost in pit which characterized in that: the speed raising device comprises an upper joint, a turbine motor system, a shell, an elastic retainer ring for a shaft, a lower centering bearing, a motion conversion device, a semicircular snap ring, a spline sleeve and a drill bit, wherein the upper end of the shell is connected with the upper joint through threads, the lower end of the shell is connected with the spline sleeve through threads, the outer cylindrical surface in the middle of the drill bit is provided with a spline groove, the spline groove is matched with the spline sleeve to transmit torque, the outer cylindrical surface in the upper end of the drill bit is provided with an annular groove, the semicircular snap ring is arranged in the annular groove, the semicircular snap ring is matched with a spline structure arranged on the inner side of the lower end of the shell, the motion conversion device is arranged between the lower end of a turbine shaft and the drill bit, the turbine motor system is arranged in the shell and comprises a water distributing bullet, an upper centering bearing, a turbine assembly and a turbine shaft, the, the turbine shaft lower end is arranged in a hollow mode, a plurality of oblique overflowing holes are formed in an outer cylindrical surface, the lower end of the turbine shaft is inserted into the center of a drill bit and can rotate circumferentially, the lower end of a lower centering bearing is arranged at the position of a step in the middle of the turbine shaft and a step in the inner side of a shell, the outer side of the upper end of the lower centering bearing is connected with a second positioning sleeve of a turbine stator, axial limiting of the inner side of the upper end of the lower centering bearing is achieved through an elastic retaining ring for a shaft, an upper centering bearing is arranged at the upper portion of the turbine shaft, the turbine assembly comprises a plurality of pairs of turbine stators and turbine rotors arranged on the turbine shaft, the turbine rotors are arranged on the turbine shaft, axial positioning of the lower ends of the turbine rotors is achieved through the limiting steps of the turbine shaft, the upper end of the turbine rotors is connected with the upper centering bearing through a positioning sleeve of the turbine rotors and is fixed through threads The centering bearing outer ring is tightly pressed, the motion conversion device comprises a roller, a roller support and a sinusoidal guide rail, a plurality of guide grooves are formed in the roller support, the roller is arranged in the guide grooves, the roller support is fixed on a turbine shaft through locking bolts, the upper end face of the sinusoidal guide rail is a sinusoidal curved surface, the roller can roll on the sinusoidal curved surface, and the lower end of the sinusoidal guide rail is fixed on a drill bit through the locking bolts.

2. The device for realizing high-frequency pressurization of the downhole drill bit by the downhole turbine driving as claimed in claim 1, wherein the outer peripheral surface of the upper joint is inlaid with gauge-protecting alloy.

3. The device for increasing the drilling speed of a well by realizing high-frequency pressurization of a downhole drill bit through downhole turbine driving as claimed in claim 1, wherein the driving power of the turbine motor system is hydraulic driving.

4. The device for increasing the drilling speed of a downhole turbine-driven high-frequency supercharging drill bit as claimed in claim 1, wherein the outer cylindrical surface of the upper joint is provided with spiral fins.

5. The device for realizing high-frequency boosting of the downhole drill bit by the downhole turbine drive as claimed in claim 1, wherein the roller bracket and the sinusoidal guide rail are designed in a cassette structure and are respectively fixed by locking bolts.

6. The drilling speed-increasing device for realizing high-frequency pressurization of the downhole drill bit by the downhole turbine driving according to any one of claims 1 to 5, wherein the front end of the water-distributing bullet is designed to be in a conical structure, the inner side of the lower end of the water-distributing bullet is provided with a thread connected with the turbine shaft, and the outer cylindrical surface of the lower end of the water-distributing bullet is provided with a plurality of sawtooth structures.

Technical Field

The invention belongs to the technical field of oil and gas field drilling tools, and particularly relates to a drilling speed-up device for realizing high-frequency pressurization of a drill bit at the bottom of a well by driving an underground turbine.

Background

In recent years, the possibility of gradually turning to deep hard strata in oil and gas resource exploration drilling engineering is higher and higher, namely, the stratum with high rock hardness, high rock drillability level value and high rock abrasiveness is higher and higher, the drilling pressure required by a drill bit is mostly provided by the weight of a drill collar on the upper part of the drill bit, the adopted rigid pressurization mode seriously influences the mechanical drilling speed and the working life of the drill bit and a bottom hole drilling tool combination, and the problem of how to improve the drilling efficiency, reduce the drilling cost, prolong the working life of a bottom hole tool and the like becomes a hot problem of industrial research. The high-frequency impact drilling mode can change the traditional rotary cutting rock breaking drilling method, and the rotary torque provided by a ground drilling machine is matched, so that the rotary impact drilling can be realized at the well bottom, the mechanical drilling speed can be improved, and the rock breaking drilling efficiency can be improved.

Disclosure of Invention

In order to improve the drilling speed and the rock breaking drilling efficiency, the invention provides a drilling speed increasing device for realizing high-frequency pressurization of a drill bit at the bottom of a well by driving an underground turbine.

The utility model provides a turbine drive realizes well drilling speed-up device of shaft bottom drill bit high frequency pressure boost in pit, speed-up device includes top connection, turbine motor system, casing, axle circlip, lower centering bearing, motion conversion equipment, semicircle snap ring, spline housing and drill bit, the casing upper end is connected with the top connection through screw thread, and the lower extreme passes through the screw thread and is connected with the spline housing, the outer face of cylinder in the middle part of the drill bit is provided with the spline groove, and spline groove and spline housing cooperation transmission moment of torsion, the outer face of cylinder in the drill bit upper end are provided with the ring channel, semicircle snap ring sets up in the ring channel, semicircle snap ring sets up the spline structure cooperation with casing lower extreme inboard, can prevent effectively that the drill bit from dropping the shaft bottom, forms the shaft bottom fish that falls, motion conversion equipment sets up between turbine shaft lower extreme and drill bit, turbine motor system, The turbine shaft is arranged in the center of the shell and realizes radial limiting and centering through the upper centering bearing and the lower centering bearing, the lower end of the turbine shaft is arranged in a hollow mode, a plurality of inclined through holes are formed in the outer cylindrical surface, the lower end of the turbine shaft is inserted into the center of a drill bit and can rotate in the circumferential direction, the lower end of the lower centering bearing is arranged at the position of a step in the middle of the turbine shaft and a step in the inner side of the shell, the outer side of the upper end of the lower centering bearing is connected with a second positioning sleeve of a turbine stator, the inner side of the upper end of the lower centering bearing realizes axial limiting through an elastic check ring for a shaft, the upper centering bearing is arranged at the upper part of the turbine shaft, the turbine assembly comprises a plurality of pairs of turbine stators and turbine rotors which are arranged on the turbine shaft, the turbine rotors are arranged on the turbine shaft, the lower ends of the turbine rotors are axially positioned through the, the turbine stator realizes radial positioning through the cooperation of turbine stator outer lane and casing inner circle, and the axial is connected with turbine stator first positioning sleeve and turbine stator second positioning sleeve respectively and is pressed tightly through last rightting bearing outer lane by the top connection, motion conversion equipment includes gyro wheel, gyro wheel support and sinusoidal guide rail, be provided with a plurality of guide slots on the gyro wheel support, the gyro wheel sets up inside the guide slot, the gyro wheel support passes through locking bolt to be fixed on the turbine shaft, sinusoidal guide rail up end is sinusoidal curved surface, and the gyro wheel can roll on sinusoidal curved surface, sinusoidal guide rail lower extreme passes through locking bolt to be fixed on the drill bit.

Furthermore, the outer peripheral surface of the upper joint is inlaid with gauge-protecting alloy.

Further, the driving power of the turbine motor system is hydraulic driving.

Further, the outer cylindrical surface of the upper joint is provided with a spiral wing.

Furthermore, the roller bracket and the sinusoidal guide rail are both designed by adopting a clamping seat structure and are respectively fixed through locking bolts.

Furthermore, the front end of the water distribution bullet is designed to be of a conical structure, the inner side of the lower end of the water distribution bullet is provided with a thread connected with a turbine shaft, and the outer cylindrical surface of the lower end of the water distribution bullet is provided with a plurality of sawtooth structures

Has the advantages that: the drilling speed-up device of the invention drives the turbine motor to rotate at high speed by using underground drilling fluid to drive the roller bracket and the roller to rotate along with the turbine shaft, the roller rolls periodically on the sinusoidal guide rail to extrude the sinusoidal guide rail to form periodic axial vibration, and the vibration energy acts on the drill bit to periodically apply drilling pressure to the drill bit. Through the reasonable design of the sine curved surface of the sine guide rail in the motion conversion device, the high-speed rotary motion output by the turbine shaft can be converted into the axial high-frequency vibration impact energy with periodic continuous change, and the high-frequency impact energy is applied to the action surface of the rock at the bottom of the well through the drill bit, so that the instantaneous stress concentration can be effectively improved, the rock crushing efficiency is improved, the mechanical drilling speed in the drilling engineering is increased, and the single drilling depth is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the device of the present invention;

FIG. 2 is a sectional view of the structure of FIG. 1A-A;

FIG. 3 is a schematic structural view of a top connector according to the present invention;

FIG. 4 is a schematic cross-sectional view of the water-distributing bullet of the present invention;

FIG. 5 is a schematic perspective view of a water-distributing bullet according to the present invention;

FIG. 6 is a schematic cross-sectional view of an upper centering bearing according to the present invention;

FIG. 7 is a top view of the upper centering bearing of the present invention;

FIG. 8 is a partial cross-sectional view of a planar configuration of a turbine shaft of the present invention;

FIG. 9 is a top view structural view of the turbine shaft of the present invention;

FIG. 10 is a schematic perspective view of a turbine shaft according to the present invention;

FIG. 11 is a schematic perspective view of a roller bracket according to the present invention;

FIG. 12 is a side view of the roller bracket of the present invention;

FIG. 13 is a schematic perspective view of a sinusoidal track of the present invention;

fig. 14 is a cross-sectional view of a sinusoidal guide rail of the present invention.

In the figure: 1. the hydraulic turbine rotor centering device comprises an upper joint, 2, a gauge alloy, 3, a water distributing bullet, 4, an upper centering bearing, 4A, an upper centering bearing outer ring, 4B, an upper centering bearing wear-resistant rubber ring, 4C, an upper centering bearing inner ring, 5, a turbine stator first positioning sleeve, 6, a turbine rotor positioning sleeve, 7, a turbine stator, 8, a turbine rotor, 9, a shell, 10, a turbine shaft, 11, a turbine stator second positioning sleeve, 12, a shaft elastic retainer ring, 13, a lower centering bearing, 14, a locking bolt, 15, a roller bracket, 16, a roller, 17, a guide rail bolt, 18, a sinusoidal guide rail, 19, a semicircular snap ring, 20, a spline sleeve, 21 and a drill bit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

With the combination of the attached drawings, the drilling speed-up device for realizing high-frequency pressurization of a well bottom drill bit by means of underground turbine driving comprises an upper joint 1, a turbine motor system, a shell 9, an elastic retainer ring 12, a lower centering bearing 13, a semicircular retainer ring 19, a spline housing 20 and a drill bit 21, wherein the upper end of the shell is connected with the upper joint 1 through threads, the lower end of the shell 9 is connected with the spline housing 20 through threads, the turbine motor system is arranged in the shell 9 and comprises a water distributing bullet 3, an upper centering bearing 4, a turbine assembly and a turbine shaft 10, the turbine shaft 10 is arranged in the center of the shell 9 and realizes radial limiting and centering through the upper centering bearing 4 and the lower centering bearing 13, the specific structure of the upper centering bearing is that an upper centering bearing outer ring 4A, an upper centering bearing wear-resistant rubber ring 4B and an upper centering bearing inner ring 4C are arranged from inside to outside in sequence, and the lower end of the turbine shaft 10, a plurality of oblique through holes are formed in the outer cylindrical surface, the lower end of a turbine shaft 10 is inserted into the center of a drill and can rotate axially, a spline groove is formed in the outer cylindrical surface of the drill and can be matched with a spline sleeve 20 to transmit torque, the lower end of a lower centering bearing 13 is arranged at the position of a step in the middle of the turbine shaft 10 and a step in the inner side of a shell 9 and can be fixed axially, the outer side of the upper end of the lower centering bearing 13 is connected with a second positioning sleeve 11 of a turbine stator, the inner side of the upper end of the lower centering bearing 13 is limited axially by an elastic retainer ring 12 for a shaft, an upper centering bearing 4 is arranged at the upper part of the turbine shaft 10, the turbine assembly comprises a plurality of turbine stators 7 and turbine rotors 8, the turbine rotors 8 are arranged on the turbine shaft 10, the lower end of the turbine shaft 10 is axially positioned by the limiting step of the turbine shaft 10, the upper end of the turbine rotors is connected with the, the turbine stator 7 component is matched with an inner ring of a shell 9 through an outer ring of the turbine stator 7 component to realize radial positioning, the turbine stator 7 component is axially connected with a second positioning sleeve 11 of the turbine stator through a first positioning sleeve 5 of the turbine stator and is pressed tightly by an upper joint 1 through an outer ring of an upper centering bearing 4, a motion conversion device capable of converting high-speed rotation motion of the turbine shaft 10 into certain axial vibration impact energy is arranged between the turbine shaft 10 and a drill bit 21, the motion conversion device comprises a roller 16, a roller bracket 15 and a sine guide rail 18, the roller 16 is of a cylindrical structure and is arranged in a plurality of guide grooves of the roller bracket 15, the roller bracket 15 is fixed on the turbine shaft 10 through a locking bolt 14, the upper end surface of the sine guide rail 18 is a sine curved surface, the roller 16 can roll on the sine curved surface, the lower end of the sine guide rail 18 is fixed on the, the turbine shaft 10 transmits the motion to the roller bracket 15 and drives the rollers 16 to roll on the sinusoidal guide rail 18, and the motion of the rollers 16 will periodically press the sinusoidal guide rail 18 due to the sinusoidal curve of the sinusoidal guide rail 18, so as to form axial periodic reciprocating vibration, and transmit the vibration to the downhole drill bit 21, so as to form periodic vibration impact action on downhole rock.

The drilling speed-up device mainly adopts the turbine motor as an energy conversion device to convert the kinetic energy of high-speed drilling fluid into mechanical energy, and further converts the mechanical energy of high-speed rotation into high-frequency periodic vibration impact energy through the motion conversion device, so that the high-frequency continuous pressurization of a well bottom drill bit is realized, and the mechanical drilling speed is increased.

Furthermore, the device of the invention adopts a hydraulic turbine element as a driving element of a power system, can form high-speed rotation under the action of drilling fluid, can further increase the axial vibration frequency of the device by matching with a sine curved surface of the sine guide rail 18, realizes high-frequency pressurization of a well bottom drill bit, and improves the mechanical drilling speed.

Furthermore, in the device, the upper joint 1 adopts a design mode of inlaying the gauge alloy 2, so that the contact strength of the tool with the friction of a well wall in the working process can be enhanced, and the abrasion of the outer wall of the tool is reduced; and, the spiral wing panel is arranged on the outer cylindrical surface of the upper joint 1, so that the guiding performance of the device can be enhanced, and the integral anti-inclination guiding capability of the device is improved.

Furthermore, in the device, an annular groove is formed in the outer cylindrical surface of the upper end of the drill bit 21, a semicircular clamping ring 19 is arranged in the annular groove, and the semicircular clamping ring 19 is matched with the spline structure, so that the drill bit 21 can be effectively prevented from falling to the bottom of the well to form fish at the bottom of the well.

Furthermore, in the device, the roller bracket 15 and the sinusoidal guide rail 18 are designed by adopting a clamping seat structure and are respectively fixed by the locking bolts 14 and 17, so that the transmission of the rotating motion torque is facilitated, the stress of the locking bolts is reduced, and the service life of the device is indirectly prolonged.

Furthermore, in the device, the front end of the water distributing bullet 3 is designed to be in a conical structure, so that the circulation of drilling fluid is facilitated, the inner side of the lower end of the water distributing bullet is provided with threads which can be connected with the turbine shaft 10, and the outer cylindrical surface of the lower end of the water distributing bullet is designed with a plurality of sawtooth structures, so that the device is favorable for screwing operation during installation.

The amplitude and the period of the impact vibration energy formed by the drilling speed-up device are respectively determined by the amplitude of the sinusoidal surface of the sinusoidal guide rail in the motion conversion device, the rotating speed of the turbine and the design period of the sinusoidal surface, and in the working process, the motion conversion device can convert the high-speed rotating motion provided by the turbine into the axial high-frequency periodic impact vibration energy and further transmit the axial high-frequency periodic impact vibration energy to a well bottom drill bit, so that the device generates high-frequency axial impact vibration.

The installation sequence and the construction method of the drilling acceleration device of the present invention will be explained below.

The installation sequence of the drilling speed-up device is as follows:

firstly, the gauge protection alloy 2 is embedded in the upper joint 1, the roller bracket 15 is fixedly arranged on the turbine shaft 10 by the locking bolt 14, a lower centering bearing 13 is arranged on a shaft through a shaft elastic retainer ring 12, a turbine stator second positioning sleeve 11, a turbine stator 7, a turbine rotor 8, a turbine stator first positioning sleeve 5, a turbine rotor positioning sleeve 6 and an upper centering bearing 4 are sequentially arranged on a turbine shaft, fixing with the water diversion bullet 3, finally, putting the whole into the shell 9 and fixing with the upper joint 1, installing the roller guide rail 18 on the drill bit 21 through the guide rail bolt 17, sleeving the spline housing 20 on the drill bit 21, installing the semicircular snap ring 19 in the slot of the drill bit 21, putting the plurality of rollers 16 into the corresponding circular slots of the roller bracket 15, and the drill bit 21, the semicircular snap ring 19 and the spline housing 20 are integrally placed in the shell 9, and the speed increasing device can be completely installed by screwing the connecting threads of the spline housing 20 and the shell 9.

The construction and use method of the high-frequency supercharging drilling speed-up device comprises the following steps:

in the field application of the device, an upper connector 1 is connected with a drill string and can be directly lowered into a well bottom, a ground pump station pumps high-pressure drilling fluid to drive a turbine group and drive a turbine shaft 10 to rotate at a high speed, the turbine shaft 10 drives a roller bracket 15 connected with a connecting bolt to rotate so as to drive a roller 16 to roll on a roller guide rail 18 at a high speed, the roller guide rail 18 is periodically extruded when the roller 16 rolls on the sinusoidal surface due to the fact that the upper surface of the roller guide rail 18 is a sinusoidal surface, high-frequency periodic axial reciprocating vibration is generated, the roller guide rail 18 directly transmits the vibration to a well bottom drill bit 21 fixedly connected with the roller guide rail 18 through the bolt 17, and the drill bit 21 generates high-frequency axial vibration to carry out rock breaking and drilling. The design mode of the spiral wing pieces and the gauge alloy adopted by the upper joint 1 can enhance the anti-inclination guiding capability of the high-frequency speed-up device, reduce the abrasion of the outer wall of the tool and be beneficial to prolonging the service life of the device.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.