CN112761540A - Drilling tool nipple with rotary crushing device and using method thereof - Google Patents

Abstract

The invention provides a drilling tool pup joint with a rotary crushing device and a method of using the same, belonging to the technical field of oil and gas drilling. One end of the short body is provided with a male taper thread, the other end is provided with a female taper thread, a mounting hole is provided in the circumferential direction and/or the axial direction, and a guide groove is also provided at a symmetrical position in the inner circumferential direction. The rotary crushing device is composed of a rotating body, a shaft sleeve, a journal, a gear shaft, and a conical tooth. The liquid flooding device can rotate under the action of drilling fluid. The transmission guide cylinder can reciprocate in the sub body. The rack is meshed with the pinion shaft. Drill tool subs can be used either near the bit end or at any position on the drill string either continuously or intermittently. It can effectively crush cuttings blocks, avoid downhole sticking accidents, and at the same time achieve the effect of drilling tool righting and anti-support pressure, improving drilling efficiency and reducing drilling costs.

Description

Drilling tool nipple with rotary crushing device and using method thereof

Technical Field

The invention relates to the technical field of oil and gas drilling, in particular to a drilling tool nipple with a rotary crushing device and a using method thereof.

Background

The main rock breaking tools currently used for forming boreholes are roller cone drill bits, PDC drill bits, composite drill bits, and the like. Because the PDC drill bit has the advantages of high drilling and rock breaking efficiency, more drilling footage in the same period, high reliability, high borehole quality and the like, the PDC drill bit is widely applied to petroleum and natural gas drilling operation in petroleum drilling engineering at present. However, due to factors such as the formation structure, the complexity of drilling, the unbalanced stress of rock, the deviation of the drill string, etc., the drilling faces technical problems such as rock debris accumulation, well wall falling block collapse, drilling tool pressure holding, drilling off-target, etc., and especially the rock debris accumulation causes the drill sticking phenomenon, which is one of the important causes of downhole accidents. How to effectively solve the problem of stuck drilling is always concerned about, and the direct relation between the sticking problem and the drilling efficiency and the promotion and development of the drilling technology is that the drilling pressure-bearing inevitably causes the problems that the drilling string is not added with the drilling pressure, the drill bit does not have footage and the like, the drilling efficiency is seriously influenced, and the drilling cost is improved.

Disclosure of Invention

In order to make up for the defects, the invention provides a drilling tool nipple with a rotary crushing device and a using method thereof, aiming at solving the problems of drilling cost improvement, drilling efficiency reduction and the like caused by the influence of rock debris block accumulation on the oil drilling efficiency in the current oil drilling process, and simultaneously having a certain effect on solving the problems of drill string pressure supporting, drill string deviation and the like in the drilling process.

The invention is realized by the following steps: the invention provides a drilling tool nipple with a rotary crushing device, which comprises a nipple body, the rotary crushing device, a driving device and a transmission guide cylinder.

Nipple joint body one end is equipped with the public awl screw thread, and the other end is equipped with female awl screw thread this internal department of being close to female awl screw thread has seted up at least one guide way, circumference and/or axial have seted up at least one first mounting hole and have run through to the internal surface on the nipple joint body are being close to public awl screw thread department internal surface is provided with first seal ring groove upper portion is followed it is used for placing the spring to be provided with the step in the female awl screw thread direction.

The rotary crushing device is characterized in that one end of the rotary crushing device is a first rotating body, the first rotating body is in a cone shape, conical teeth are arranged on the first rotating body, the other end of the rotary crushing device is a shaft neck, a gear shaft is arranged at the tail end of the shaft neck far away from the first rotating body, a shaft sleeve is further arranged on the rotary crushing device in a matched mode, the shaft sleeve is connected with the shaft neck through a bearing pair, a first ball hole is formed in the shaft sleeve, and the rotary crushing device is inserted into the first mounting hole through the shaft sleeve in an interference mode.

Drive arrangement includes a pivot section of thick bamboo, helical blade and hinders liquid dish, a pivot section of thick bamboo one end is provided with first ball annular, radially seted up the second ball hole in the first ball annular, it sets up to hinder the liquid dish first ball annular upper portion, hinder and seted up a tapping hole on the liquid dish the pivot section of thick bamboo remainder is equipped with helical blade, helical blade follows a pivot section of thick bamboo axial is the heliciform and climbs, helical blade with a pivot section of thick bamboo welded connection or riveting connection, hinder the liquid dish with a pivot section of thick bamboo interference fit connects or welded connection.

The transmission guide cylinder is provided with a first circumferential platform and a second circumferential platform, the second circumferential platform is provided with a guide block groove, a rack insertion hole, a liquid passing hole, a second mounting hole, a second seal ring groove and a second ball ring groove, the guide block groove is used for installing a guide block, the other end of the guide block is in clearance fit with the guide groove and can freely slide in the guide groove, and the transmission guide cylinder is prevented from falling off after being installed by the stop block, a rack is inserted in the rack insertion hole, the rack is meshed with the gear shaft, the second mounting hole is used for mounting a rotating shaft cylinder of the driving device, the first ball ring groove is matched with the second ball ring groove to install balls to form bearing pair connection, the driving device can be guaranteed to rotate freely under the drive of fluid force, and the first circumferential platform and the placing step are used for positioning the spring.

In one embodiment of the invention, the drilling tool sub maximum circumferential diameter should be less than the borehole diameter.

In an embodiment of the present invention, the nipple body is axially provided with at least one flow channel.

In one embodiment of the invention, female taper threads are arranged at both ends of the nipple body.

In an embodiment of the present invention, the first rotating body, the journal and the gear shaft of the rotary crushing device may be integrally designed or may be integrally designed two by two and may be integrally formed with another component by a threaded connection or a welding or an interference fit through the hole shaft, or may be integrally formed by a threaded connection or a welding or an interference fit through the hole shaft.

In one embodiment of the invention, the first rotator shape may be a cone shape, a mushroom shape, a cylinder shape, or a cone shape; the first rotating body can be provided with conical teeth, PDC teeth or other types of teeth commonly used for well drilling.

In one embodiment of the present invention, the circumferential diameter of the helical blade of the driving device in the projection plane should be smaller than the bore diameter of the transmission guide cylinder.

In one embodiment of the present invention, the rack and the gear shaft can be completely meshed, and the tooth profiles of the rack and the gear shaft should be straight teeth or helical teeth.

In one embodiment of the invention, the drilling tool nipple I can be used singly or in combination at any position of the whole drill string, and can also be directly connected with a drill bit and used near the bottom of a well, and is mainly used at an inclined well section and/or a horizontal well end.

The embodiment of the invention also provides a using method of the drilling tool short section with the rotary crushing device, which is carried out by using the drilling tool short section with the rotary crushing device, and comprises the following steps:

the method comprises the following steps: firstly, a rack is inserted and installed in a rack insertion hole in a second circumferential platform of a transmission guide cylinder, the rack is guaranteed to be installed reliably and in interference fit, a guide block is arranged in a guide block groove in an expanding mode, finally a driving device is arranged in a proper position in a second installation hole in the second circumferential platform of the transmission guide cylinder, a first ball ring groove and a second ball ring groove are guaranteed to be in the same position, then balls forming a bearing pair are placed into the ball ring grooves from the second ball hole through a special tool, and the transmission guide cylinder and the driving device are installed;

step two: then, installing the rotary crushing device into the first installation hole, and in the installation process, paying attention to interference assembly of the shaft sleeve and the first installation hole in the nipple body and paying attention to the rotary crushing device which is installed in a rotary mode to ensure that the rotary crushing device can rotate freely;

step three: assembling the transmission guide cylinder and the driving device which are assembled in the first step and the short section body of the rotary crushing device which is installed in the second step, specifically, firstly, placing sealing rings and the like in each sealing ring groove, secondly, positioning the assembly part in the first step accurately through a guide block, sleeving a spring at the lower end of a first circumferential platform of the transmission guide cylinder, then installing the assembly part in the short section body through the guide groove, pulling the driving device back and forth to adjust so that a rack is meshed with a gear shaft and can be driven, observing that the rotary crushing device rotates freely as a standard, and finally, expanding and tightly installing a stopping block in the short section groove to finish the installation of the drilling tool I;

step four: the drilling tool short joint I can be used at any position of the whole drill string singly or in combination, the multiple combinations are connected by the drill string and can also be directly connected with a drill bit and used near the bottom of a well, the drilling tool short joint I is mainly used at an inclined well section and/or a horizontal well end, and a driving device section is arranged at the upper part of the whole drill string in use, namely the end far away from the bottom of the well and cannot be used reversely.

The invention has the beneficial effects that:

1. the rotary crushing device moves periodically and reciprocally, and conical teeth, PDC teeth and the like on the rotating body crush the rock debris secondarily and reciprocally, so that the drilling tool jamming risk is reduced;

2. the liquid blocking disc periodically blocks the liquid passing hole, pressure difference is periodically generated at two ends of the second circumferential platform, so that drilling fluid generates periodic impact force on the lower drilling tool and generates axial impact on the lower drilling tool, and the spring compression pushes the spring of the short section to generate periodic axial vibration, so that the lower drilling tool is promoted to be separated from viscous force constraint, and the supporting pressure phenomenon of the drilling tool is reduced;

3. due to the arrangement of the rotary crushing device, when a plurality of drilling tools are combined to use the short section, the rotary crushing device can also achieve the effect of centralizing a drill string, and can also achieve the effect of dispersion and gauge protection when the rotary crushing device is combined with a drill bit to use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2 is a cutaway special representation of FIG. 1;

FIG. 3 is an assembly schematic diagram of the hidden nipple body in FIG. 1;

FIG. 4 is a full-sectional view of the body of the nipple of FIG. 1;

FIG. 5 is a schematic view of the rotary crushing apparatus of FIG. 1;

FIG. 6 is a schematic structural diagram of the driving device in FIG. 2;

FIG. 7 is a schematic structural view of the transmission guide cylinder of FIG. 1;

FIG. 8 is a schematic structural view of the rack of FIG. 2;

FIG. 9 is a schematic structural view of example 2;

fig. 10 is a schematic view showing the structure of a rotary crushing apparatus in example 2;

FIG. 11 is a schematic structural view of example 3;

FIG. 12 is a schematic structural view of example 4;

FIG. 13 is a schematic structural view of example 5;

FIG. 14 is a schematic view showing the structure of a rotary crushing apparatus in example 5;

FIG. 15 is a schematic view showing the use of the drilling tool sub assembly according to example 6;

FIG. 16 is a schematic view of the drilling tool sub and PDC bit combination used in example 6;

figure 17 is a schematic representation of the use of the drilling tool sub of example 6 in a wellbore.

In the figure: 100-nipple body; 110-male taper threads; 120-female taper threads; 130-a guide groove; 140-a first mounting hole; 150-a first seal ring groove; 160-placing a step; 170-a flow channel; 200-a rotating crushing device; 210-a first rotating body; 211-conical teeth; 220-journal; 221-a gear shaft; 230-shaft sleeve; 231-first ball hole; 240-a second rotating body; 241-PDC teeth; 250-an impeller; 300-a drive device; 310-a rotating shaft cylinder; 311-a first ball ring groove; 3110-second ball hole; 320-helical blades; 330-liquid blocking disc; 331-a weep hole; 400-a transmission guide cylinder; 410-a first circumferential platform; 420-a second circumferential platform; 421-guide block groove; 422-rack plug holes; 423-liquid passing hole; 424-second mounting holes; 425-a second seal ring groove; 426-a second ball ring groove; 500-a spring; 600-a rack; 700-stop block; 800-a guide block; 900-a drill bit; 1000-drill string; i-drilling tool nipple.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

Referring to fig. 1, the present invention provides a technical solution: a drilling tool sub with a rotary crushing device comprises a sub body 100, the rotary crushing device 200, a driving device 300 and a transmission guide cylinder 400.

Referring to fig. 2, 3 and 4, one end of the nipple body 100 is provided with a male taper thread 110, the other end is provided with a female taper thread 120, at least one guide groove 130 is formed in the nipple body 100 near the female taper thread 120, at least one first mounting hole 140 is formed in the nipple body 100 in the circumferential direction and/or the axial direction and penetrates through to the inner surface, a first seal ring groove 150 is formed in the inner surface near the male taper thread 110, and a placing step 160 for placing a spring 500 is formed in the upper portion of the first seal ring groove 150 along the direction of the female taper thread 120. It should be noted that the maximum circumferential diameter of the sub body 100 should be slightly less than the diameter of the borehole, so as to ensure that the sub body 100 can smoothly enter the borehole, and specifically, the sub body 100 may be provided with tapered teeth 211, PDC teeth 241, or other various tooth types commonly used for drilling.

Referring to fig. 5, one end of the rotating crushing device 200 is a first rotating body 210, and the first rotating body 210 may be in the shape of a cone, mushroom, cylinder or cone; the first rotator 210 can be arranged with the tapered teeth 211, the PDC teeth 241 or other various tooth types commonly used for drilling, the other end of the rotary crushing device 200 is a shaft neck 220, the shaft neck 220 is far away from the end of the first rotator 210 and is provided with a gear shaft 221, the rotary crushing device 200 is further provided with a shaft sleeve 230 in a matching manner, the shaft sleeve 230 is connected with the shaft neck 220 through a bearing pair, a first ball hole 231 is formed in the shaft sleeve 230, a steel ball is conveniently placed into the shaft sleeve 230 through the first ball hole 231, and the rotary crushing device 200 is inserted into the first mounting hole 140 through the shaft sleeve 230 and is in interference connection. In a specific arrangement, the first rotating body 210, the journal 220 and the gear shaft 221 of the rotary crushing device 200 may be integrally designed or integrally designed two by two and integrally formed with another component by a threaded connection or a welding or an interference fit through a hole and a shaft, or integrally formed by a threaded connection or a welding or an interference fit through a hole and a shaft.

Referring to fig. 6, the driving device 300 includes a rotating shaft cylinder 310, a spiral blade 320 and a liquid blocking disc 330, wherein one end of the rotating shaft cylinder 310 is provided with a first ball ring groove 311, a second ball hole 3110 is radially formed in the first ball ring groove 311, a steel ball is conveniently placed into the first ball ring groove 311 and the second ball ring groove 426 through the second ball hole 3110, the liquid blocking disc 330 is disposed on the upper portion of the first ball ring groove 311, the liquid blocking disc 330 is provided with a liquid discharging hole 331, the remaining portion of the rotating shaft cylinder 310 is provided with the spiral blade 320, the spiral blade 320 spirally ascends along the axial direction of the rotating shaft cylinder 310, the spiral blade 320 is connected or riveted with the rotating shaft cylinder 310, and the liquid blocking disc 330 is connected or welded with the rotating shaft cylinder 310 in an interference fit manner.

Referring to fig. 7 and 8, the transmission guide cylinder 400 is provided with a first circumferential platform 410 and a second circumferential platform 420, the second circumferential platform 420 is provided with a guide block groove 421, a rack insertion hole 422, a liquid passing hole 423, a second mounting hole 424, a second seal ring groove 425 and a second ball ring groove 426, the guide block groove 421 is used for mounting the guide block 800, the other end of the guide block 800 is in clearance fit with the guide groove 130 and can freely slide in the guide groove 130, the transmission guide cylinder 400 is prevented from falling off after being mounted by the stop block 700, a rack 600 is inserted into the rack insertion hole 422, the rack 600 and the gear shaft 221 can be completely engaged, and the tooth profiles of the rack 600 and the gear shaft 221 should be straight teeth or oblique teeth. The second mounting hole 424 is used for mounting the rotating shaft cylinder 310 of the driving device 300, the first ball ring groove 311 and the second ball ring groove 426 are matched to mount balls to form a bearing pair connection, the driving device 300 can be ensured to rotate freely under the driving of fluid force, and the first circumferential platform 410 and the placing step 160 are used for positioning the spring 500. It should be noted that the circumferential diameter of the helical blade 320 of the driving device 300 in the projection plane should be slightly smaller than the aperture of the transmission guide cylinder 400.

Example 2

Referring to fig. 9 and 10, the present embodiment is substantially the same as embodiment 1, except that: the journal 220 is fixed with a second rotating body 240, the second rotating body 240 is cylindrical, and PDC teeth 241 are uniformly arranged on the second rotating body 240.

Example 3

Please refer to fig. 11, the present embodiment is substantially the same as embodiments 1 and 2, except that: at least one flow passage 170 is axially formed in the nipple body 100.

Example 4

Referring to fig. 12, the present example is substantially the same as the previous embodiment except that: the two ends of the nipple body 100 are both provided with female taper threads 120.

Example 5

Referring to fig. 13 and 14, the present example is substantially the same as the previous embodiment except that: an impeller 250 is fixed to an end of the journal 220 remote from the first rotating body 210.

Example 6

Referring to fig. 15-17, the present example is substantially the same as the previous embodiment, except that: the drilling tool sub I can be used at any position of the whole drill string 1000 singly or in combination of a plurality of parts, the plurality of parts can be connected by the drill string 1000, and can also be directly connected with the drill bit 900 and used near the bottom of a well, and the drilling tool sub I is mainly used at an inclined well section and/or a horizontal well end.

The foregoing embodiments of the present invention can be freely combined to form multiple embodiments, all of which are contemplated and claimed by the present invention. In the scheme of the invention, each selection example can be combined with any other base example and selection example at will, and is not listed any more.

The embodiment of the invention also provides a using method of the drilling tool short section with the rotary crushing device, which is carried out by utilizing the drilling tool short section with the rotary crushing device, and comprises the following steps:

the method comprises the following steps: firstly, the rack 600 is inserted and installed in the rack insertion hole 422 on the second circumferential platform 420 of the transmission guide cylinder 400, the installation of the rack 600 is guaranteed to be reliable and interference fit, then the guide block 800 is expanded and installed in the guide block groove 421, finally the driving device 300 is placed in the second installation hole 424 on the second circumferential platform 420 of the transmission guide cylinder 400 at a proper position, after the first ball ring groove 311 and the second ball ring groove 426 are ensured to be in the same position, then balls forming a bearing pair are placed into the ball ring grooves from the second ball hole 3110 through a special tool, and the installation of the transmission guide cylinder 400 and the driving device 300 is completed;

step two: then, installing the rotary crushing device 200 into the first installation hole 140, wherein in the installation process, attention should be paid to interference fit between the shaft sleeve 230 and the first installation hole 140 on the nipple body 100, and attention should be paid to the rotary crushing device 200 which is installed in a rotary mode to ensure that the rotary crushing device can rotate freely;

step three: assembling the transmission guide cylinder 400 and the driving device 300 assembled in the step one and the nipple joint body 100 of the rotary crushing device 200 assembled in the step two, specifically, firstly, placing sealing rings and the like in each sealing ring groove, secondly, positioning the assembled parts in the step one accurately through the guide block 800, sleeving the spring 500 at the lower end of the first circumferential platform 410 of the transmission guide cylinder 400, then installing the assembled parts in the nipple joint body 100 through the guide groove 130, pulling the driving device 300 back and forth to adjust so that the rack 600 is meshed with the gear shaft 221 and can transmit, observing that the rotary crushing device 200 rotates freely as a standard, and finally, installing the stopping block 700 in the guide groove 130 in an expanding manner to complete the installation of the nipple joint I of the drilling tool.

Step four: the drilling tool sub I can be used at any position of the whole drill string 1000 singly or in a plurality of combinations, the plurality of combinations are connected by the drill string 1000 and can also be directly connected with the drill bit 900 and used near the bottom of a well, the drilling tool sub is mainly used at an inclined well section and/or a horizontal well end, and in use, one section of the driving device 300 is positioned at the upper part of the whole drill string 1000, namely the end far away from the bottom of the well, and the drilling tool sub I cannot be used upside down.

The working principle of the drilling tool nipple with the rotary crushing device is as follows: because the rotating shaft cylinder 310 is connected with the second circumferential platform 420 through the bearing pair, the driving device 300 rotates under the action of the impact helical blade 320 of the drilling fluid, the liquid blocking disc 330 rotates along with the rotation, when the liquid discharge hole 331 on the liquid blocking disc 330 is not communicated with the liquid passing hole 423 on the second circumferential platform 420, the drilling fluid cannot pass smoothly, so that pressure difference is generated at two ends of the second circumferential platform 420, and the transmission guide cylinder 400 is driven to transmit towards the downhole direction under the action of the pressure difference;

the rack 600 mounted on the transmission guide cylinder 400 moves downward under the action of the pressure difference, and the rack 600 drives the rotary crushing device 200 to rotate due to the fact that the rack 600 is meshed with the gear shaft 221 and the guide block 800 and the guide groove 130 act to limit the circumferential rotation of the transmission guide cylinder 400;

when the liquid blocking plate 330 is communicated with the liquid passing hole 423, the pressure difference between the two ends of the second circumferential platform 420 disappears, the spring 500 installed between the first circumferential platform 410 and the placing step 160 is reset to push the transmission guide cylinder 400 to transmit towards the ground, and the rack 600 moves upwards along with the transmission guide cylinder to drive the rotary crushing device 200 to rotate in the opposite direction. In the periodical overlapping and dislocation process of the liquid discharging holes 331 and the liquid passing holes 423, the rotary crushing device 200 generates periodical positive and negative direction rotary motion, the periodical rotation of the rotary crushing device 200 continuously and repeatedly crushes rock debris blocks, meanwhile, due to the fact that the liquid blocking disc 330 periodically blocks drilling liquid, the drilling liquid generates periodical impact force on a lower drilling tool, meanwhile, the spring 500 applies spring thrust to the short section, the drill string generates axial vibration, and the phenomenon of supporting pressure of the drill string is reduced.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (10)

1. A drilling tool short joint with a rotary crushing device is characterized by comprising

The pipe nipple comprises a pipe nipple body (100), wherein one end of the pipe nipple body (100) is provided with a male taper thread (110), the other end of the pipe nipple body is provided with a female taper thread (120), at least one guide groove (130) is formed in the pipe nipple body (100) close to the female taper thread (120), at least one first mounting hole (140) is formed in the pipe nipple body (100) in the circumferential direction and/or the axial direction and penetrates through the pipe nipple body to the inner surface, a first sealing ring groove (150) is formed in the inner surface close to the male taper thread (110), and a placing step (160) for placing a spring (500) is formed in the upper portion of the first sealing ring groove (150) along the direction of the female taper thread (120);

the crushing device comprises a rotary crushing device (200), wherein one end of the rotary crushing device (200) is a first rotating body (210), the first rotating body (210) is in a cone shape, conical teeth (211) are arranged on the first rotating body, the other end of the rotary crushing device (200) is a journal (220), a gear shaft (221) is arranged at the tail end, far away from the first rotating body (210), of the journal (220), a shaft sleeve (230) is further arranged on the rotary crushing device (200) in a matched mode, the shaft sleeve (230) is connected with the journal (220) through a bearing pair, a first ball hole (231) is formed in the shaft sleeve (230), and the rotary crushing device (200) is inserted into the first mounting hole (140) through the shaft sleeve (230) and is in interference connection;

the driving device (300) comprises a rotating shaft cylinder (310), a helical blade (320) and a liquid blocking disc (330), wherein a first ball ring groove (311) is formed in one end of the rotating shaft cylinder (310), a second ball hole (3110) is formed in the first ball ring groove (311) in the radial direction, the liquid blocking disc (330) is arranged on the upper portion of the first ball ring groove (311), a liquid discharging hole (331) is formed in the liquid blocking disc (330), the helical blade (320) is arranged on the rest portion of the rotating shaft cylinder (310), the helical blade (320) ascends spirally along the axial direction of the rotating shaft cylinder (310), the helical blade (320) is connected or riveted with the rotating shaft cylinder (310) in a welding mode, and the liquid blocking disc (330) is connected or welded with the rotating shaft cylinder (310) in an interference fit mode;

the transmission guide cylinder (400) is provided with a first circumferential platform (410) and a second circumferential platform (420), the second circumferential platform (420) is provided with a guide block groove (421), a rack insertion hole (422), a liquid passing hole (423), a second mounting hole (424), a second sealing ring groove (425) and a second ball ring groove (426), the guide block groove (421) is used for mounting a guide block (800), the other end of the guide block (800) is in clearance fit with the guide groove (130) and can freely slide in the guide groove (130), the transmission guide cylinder (400) is prevented from falling off after being mounted through a stop block (700), a rack (600) is inserted in the rack insertion hole (422), the rack (600) is meshed with the gear shaft (221), and the second mounting hole (424) is used for mounting a rotating shaft cylinder (310) of the driving device (300), the first ball ring groove (311) is matched with the second ball ring groove (426) to be used for installing balls to form a bearing pair connection, the driving device (300) can be guaranteed to rotate freely under the driving of fluid force, and the first circumferential platform (410) and the placing step (160) are used for positioning the spring (500).

2. The drill tool sub with the rotary fracturing device of claim 1, wherein the maximum circumferential diameter of the drill tool sub I is smaller than the borehole diameter.

3. The drilling tool sub with a rotary crushing device according to claim 1, characterized in that the sub body (100) is axially provided with at least one flow channel (170).

4. The drilling tool sub with a rotational fragmentation device according to claim 1, characterized in that the sub body (100) is provided with female cone threads (120) at both ends.

5. The short joint of the drilling tool with the rotary crushing device according to claim 1, characterized in that the first rotating body (210), the journal (220) and the gear shaft (221) of the rotary crushing device (200) are designed integrally or in pairs and are integrated with another component by screwing or welding or interference fit with the shaft, or are integrated by screwing or welding or interference fit with the shaft.

6. The drilling tool sub with a rotational fragmentation device according to claim 1, characterized in that the first rotating body (210) can be cone-shaped, mushroom-shaped, cylindrical or conical in shape; the first rotating body (210) may be provided with tapered teeth, PDC teeth (241), or other types of teeth commonly used for drilling.

7. The drilling tool sub with a rotary crushing device according to claim 1, characterized in that the circumferential diameter of the helical blade (320) of the driving device (300) in the projection plane should be smaller than the bore diameter of the transmission guide cylinder (400).

8. The drilling tool sub with the rotary crushing device according to claim 1, characterized in that the rack (600) and the gear shaft (221) can be completely meshed, and the tooth profiles of the rack (600) and the gear shaft (221) are straight teeth or helical teeth.

9. The drilling tool sub with the rotary crushing device according to claim 1, characterized in that the drilling tool sub I can be used singly or in combination at any position of the whole drill string, and can also be directly connected with a drill bit and used near the bottom of a well, and is mainly used at an inclined well section and/or a horizontal well end.

10. A method of using a drilling tool sub having a rotational breaker device, using a drilling tool sub having a rotational breaker device according to any one of claims 1 to 9, comprising the steps of:

the method comprises the following steps: firstly, a rack is inserted and installed in a rack insertion hole in a second circumferential platform of a transmission guide cylinder, the rack is guaranteed to be installed reliably and in interference fit, a guide block is arranged in a guide block groove in an expanding mode, finally a driving device is arranged in a proper position in a second installation hole in the second circumferential platform of the transmission guide cylinder, a first ball ring groove and a second ball ring groove are guaranteed to be in the same position, then balls forming a bearing pair are placed into the ball ring grooves from the second ball hole through a special tool, and the transmission guide cylinder and the driving device are installed;

step two: then, installing the rotary crushing device into the first installation hole, and in the installation process, paying attention to interference assembly of the shaft sleeve and the first installation hole in the nipple body and paying attention to the rotary crushing device which is installed in a rotary mode to ensure that the rotary crushing device can rotate freely;

step three: assembling the transmission guide cylinder and the driving device which are assembled in the step one and the short section body of the rotary crushing device which is installed in the step two, specifically, firstly, placing sealing rings and the like in each sealing ring groove, secondly, positioning the assembly part in the step one accurately through a guide block, sleeving a spring at the lower end of a first circumferential platform of the transmission guide cylinder, installing the assembly part in the short section body through the guide groove, pulling the driving device back and forth to adjust so that a rack is meshed with a gear shaft and can rotate, observing that the rotary crushing device rotates freely as a standard, and finally, expanding and tightly installing a stopping block in the short section groove to finish the installation of the drilling tool I;

step four: the drilling tool short joint I can be used at any position of the whole drill string singly or in combination, the multiple combinations are connected by the drill string and can also be directly connected with a drill bit and used near the bottom of a well, the drilling tool short joint I is mainly used at an inclined well section and/or a horizontal well end, and a driving device section is arranged at the upper part of the whole drill string in use, namely the end far away from the bottom of the well and cannot be used reversely.

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