CN117780261A - Composite impact drilling speed-increasing tool - Google Patents

Abstract

The invention discloses a composite impact drilling speed-increasing tool, which comprises: a sleeve; the static valve is sleeved at the upper part of the sleeve, and the top of the static valve is provided with a second flow channel; the movable valve is rotatably arranged at the top of the static valve and is provided with a first flow channel which is correspondingly communicated with the second flow channel; the connecting component is fixed at the bottom of the static valve; the impact hammer is sleeved on the upper part of the connecting assembly, hammerheads corresponding to the impact cabin on the connecting assembly are arranged on two sides of the outer ring surface, and inner keys are arranged on two sides of the inner ring surface; the reversing sleeve is sleeved in the impact hammer, and the upper part of the reversing sleeve is sleeved in the static valve and connected with the bottom of the movable valve; and the runner system drives the reversing cabin and the hammer head to do reciprocating rotary motion. The invention realizes two functions of axial impact and torsional impact by utilizing the working characteristic of self-excited reciprocating rotation of the reversing sleeve, has simple tool structure, short length and convenient processing, and optimizes the working structure on the basis of ensuring the speed-increasing efficiency.

Description

Composite impact drilling speed-increasing tool

Technical Field

The invention relates to the technical field of drilling. More particularly, the present invention relates to a composite impact drilling acceleration tool.

Background

The composite impact drilling speed-increasing tool is applied to the field of petroleum and natural gas drilling engineering, and the tool generates axial and torsional impacts, the torsional impacts eliminate the phenomenon of 'stick slip' of a drill bit, the axial impacts increase the depth of teeth of the drill bit, and the two impacts are matched with each other, so that the rock breaking efficiency and the footage of the drill bit are improved.

At present, the composite impact drilling speed-increasing tool mainly comprises a self-oscillation type tool, a turbine driving type tool, a double-hammer impact type tool and the like, and all the tools have respective advantages and disadvantages. The self-excited oscillation type drilling acceleration tool is characterized in that hydraulic pulse is generated when high-pressure drilling fluid flows through a self-excited oscillation cavity, and the hydraulic pulse force is decomposed into axial impact force and torsional impact force through an internal spiral surface, the tool is simple in structure, but has the problem that the impact frequency is too high (300-600 Hz) and exceeds the rock impact breaking applicable frequency (10-25 Hz), and the tool is long and has insufficient matching performance with other general drilling tools (such as screw drilling tools); the turbine-driven drilling acceleration tool drives a mandrel to rotate when high-pressure drilling fluid flows through a turbine group to drive a hammer body to generate axial impact force and torsional impact force, and has the problems of complex structure of the turbine group, long tool length and quick abrasion of impact contact parts; the double hammering type tool has the advantages that axial piston type impact hammer is added on the basis of impact of the impact hammer in the torsional direction, and the tool has the problems of complex structure and rapid abrasion.

In order to solve the above problems, a novel composite impact drilling speed-increasing tool is needed to be designed, the structure of the drilling speed-increasing tool is optimized, the suitability of the drilling speed-increasing tool and a drilling tool is improved, and the processing difficulty is reduced.

Disclosure of Invention

The invention aims to provide a composite impact drilling speed-increasing tool, which realizes two functions of axial impact and torsional impact by utilizing the working characteristic of self-excitation reciprocating rotation of a reversing sleeve on the basis of the torsional impact drilling speed-increasing tool, has simple structure, short length and convenient processing, optimizes the working structure on the basis of ensuring the speed-increasing efficiency, improves the suitability of the tool and a drilling tool and reduces the processing difficulty.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a composite impact drilling acceleration tool comprising:

a sleeve arranged at the bottom of the drill string and with an opening at the upper end communicated with the drill string;

the static valve is an axial through structure for fixing the inner sleeve at the upper part of the sleeve, and the top of the static valve is provided with second flow channel grooves at intervals along the circumferential direction;

the movable valve is rotatably arranged at the top of the static valve and is communicated with the inside of the static valve through an upper nozzle, and first flow channel grooves are circumferentially arranged on the movable valve at intervals, axially penetrate through and are correspondingly communicated with the second flow channel grooves;

The connecting component is fixed at the bottom of the static valve and communicated with the upper part and the lower part through a lower nozzle, the upper part of the connecting component is of an annular structure which is sleeved in the sleeve in a matched manner, impact cabins are symmetrically arranged on the left side and the right side of the inner ring surface of the connecting component, and the lower part of the connecting component is connected and communicated with the top of the drill bit;

the impact hammer is of an annular structure, hammerheads corresponding to the impact cabin are symmetrically arranged on the left side and the right side of the outer annular surface of the impact hammer and matched with the inner sleeve at the upper part of the connecting assembly, and inner keys are symmetrically arranged on the front side and the rear side of the inner annular surface of the impact hammer;

the reversing sleeve is of an annular structure, reversing cabins corresponding to the inner keys are symmetrically arranged on the front side and the rear side of an outer ring of the lower part of the reversing sleeve, the reversing cabin is sleeved in the impact hammer in a matched mode, the upper part of the reversing sleeve is sleeved in the static valve in a matched mode and is fixedly connected with the bottom of the movable valve, and two ends of the inner part of the reversing sleeve are respectively communicated with the upper nozzle and the lower nozzle;

the flow passage system is arranged in the sleeve and communicated with the upper nozzle and the lower nozzle through different flow passages, drilling fluid generates pressure drop when flowing through the lower nozzle, the reversing cabin of the reversing sleeve is driven to do reciprocating rotation under the limit of the inner key, and the hammer head of the impact hammer does reciprocating rotation in the impact cabin.

Preferably, the composite impact drilling speed-increasing tool is characterized in that ball grooves are formed in the upper end face of the static valve and the lower end face of the movable valve in a relative mode, the ball grooves are continuously formed in the circumferential direction of the movable valve and form an annular space, a plurality of balls are arranged in the ball grooves, and the movable valve is coaxially arranged and rotatably connected with the static valve through the balls.

Preferably, the connecting component is of a split structure, the upper part and the lower part of the connecting component are respectively provided with a hammer sleeve and a lower joint, the lower joint is fixedly sleeved at the lower part of the sleeve and communicated with a drill bit through a central hole, and the hammer sleeve is clamped between the lower joint and the static valve; the rotary hammer is characterized in that a lower end cover is further arranged between the hammer sleeve and the lower connector, an axial perforation is arranged in the middle of the lower end cover, the lower nozzle is arranged at the axial perforation and is communicated with the reversing sleeve and the central hole, and the static valve, the hammer sleeve, the lower end cover and the lower connector are locked and fixed along the axial direction through a connecting device.

Preferably, the lower joint is detachably connected with the sleeve through a locking device, and the locking device comprises two locking grooves which are oppositely arranged on the outer ring surface of the lower joint and the inner side wall of the sleeve and form annular empty grooves along the circumference of the outer ring surface of the lower joint; the locking elements are continuously arranged inside the annular empty groove along the circumferential direction of the annular empty groove, and any locking element is matched and clamped with the annular empty groove.

Preferably, the impact cabin, the hammer head, the internal key and the reversing cabin are of mutually matched fan-shaped annular structures, the central angle of the impact cabin is larger than that of the hammer head, and the central angle of the reversing cabin is larger than that of the internal key.

Preferably, the composite impact drilling speed-increasing tool, the static valve is of a dumbbell structure, the middle part of the static valve is contracted inwards and forms an annular cavity with the inner side wall of the sleeve, and the runner system comprises:

the two groups of bypass holes are respectively arranged at the upper part of the reversing sleeve and the middle part of the static valve, and are mutually and correspondingly arranged and communicated with the interior of the reversing sleeve and the annular cavity;

four reversing runner holes which are circumferentially arranged on the bottom surface of the annular cavity at intervals;

two groups of inner key runner grooves which respectively correspond to the two inner keys, wherein any group of inner key runner grooves comprises two inner key runner grooves which are respectively and closely arranged at two sides of the corresponding inner key, and any inner key runner groove is communicated with the inner ring surface and the outer ring surface of the impact hammer;

two groups of hammer head runner grooves which respectively correspond to the two hammer heads, wherein any group of hammer head runner grooves comprise two hammer head runner grooves which are respectively and closely arranged at two sides of the corresponding hammer heads, and any hammer head runner groove is communicated with the inner ring surface and the outer ring surface of the impact hammer;

Two groups of first reversing flow passage grooves are correspondingly arranged at the lower part of the reversing sleeve with the two groups of hammer flow passage grooves, any one group of first reversing flow passage grooves comprises two first reversing flow passage grooves which are correspondingly arranged with the two hammer flow passage grooves of the same group, and any one first reversing flow passage groove is communicated with the inner ring surface and the outer ring surface of the reversing sleeve;

two groups of second reversing flow passage grooves which are correspondingly arranged on the inner ring surface of the upper part of the connecting component with the two groups of inner key flow passage grooves, wherein any group of second reversing flow passage grooves comprises two second reversing flow passage grooves which are correspondingly arranged with the two inner key flow passage grooves of the same group, and four second reversing flow passage grooves are correspondingly communicated with the four reversing flow passage holes one by one;

the two reversing cabin low-pressure flow channels are arranged on the inner ring surface of the upper part of the connecting component corresponding to the two groups of inner key flow channel grooves, and any reversing cabin low-pressure flow channel is positioned between the two corresponding second reversing flow channel grooves and communicated with the upper part and the lower part of the connecting component;

the two groups of impact cabin low-pressure flow channels are arranged at the lower part of the reversing sleeve corresponding to the two groups of hammer head flow channel grooves, any one group of impact cabin low-pressure flow channels comprise two impact cabin low-pressure flow channels which are positioned at two sides of a corresponding group of first reversing flow channel grooves and are arranged corresponding to the two hammer head flow channel grooves of the same group, and any impact cabin low-pressure flow channel is communicated with the upper part and the lower part of the connecting assembly;

When the two sides of the hammer head alternately rotate to be abutted with the two sides of the impact cabin, the same group of hammer head runner grooves are alternately communicated with the corresponding impact cabin, and the same inner key runner grooves are alternately communicated with the corresponding first low-pressure runner grooves and the corresponding second reversing runner grooves; when two sides of the reversing cabin alternately rotate to be abutted with two sides of the inner key, the same group of first reversing flow channel grooves are alternately communicated with the corresponding hammer flow channel grooves, the same group of impact cabin low-pressure flow channels are alternately communicated with the corresponding hammer flow channel grooves, and the same group of inner key flow channel grooves are alternately communicated with the corresponding reversing cabin.

Preferably, the compound percussion drilling acceleration tool further comprises a seal assembly comprising: a radial seal ring provided between a lower portion of the connection assembly and the sleeve in a circumferential direction of the sleeve; the axial sealing ring is arranged between the lower end face of the static valve and the upper end face of the connecting assembly along the circumferential direction of the sleeve.

Preferably, the lower outer diameter of the reversing sleeve is larger than the upper outer diameter of the reversing sleeve, the reversing cabin is communicated with the upper outer space of the reversing sleeve, the lower height of the reversing sleeve is lower than the upper height of the connecting assembly, and the bottom of the static valve is matched and clamped with the positioning step between the upper part and the lower part of the reversing sleeve through a sealing ring.

The invention at least comprises the following beneficial effects:

1. according to the invention, on the basis of the torsion impact drilling speed-increasing tool, the two functions of axial impact and torsion impact are realized by utilizing the working characteristic of self-excitation reciprocating rotation of the reversing sleeve, the tool is simple in structure, short in length and convenient to process, the axial impact frequency and the torsion impact frequency are the same, the working structure is optimized on the basis of ensuring the speed-increasing efficiency, the adaptability of the tool and a drilling tool is improved, and the processing difficulty is reduced;

2. according to the invention, the ball is additionally arranged between the movable valve and the static valve, so that the friction resistance of the movable valve during rotation is reduced, and the impact frequency of a tool is further improved, thereby improving the drilling speed-up effect;

3. the invention separates the connecting component into the hammer sleeve and the lower joint, the lower end cover is arranged between the hammer sleeve and the lower joint as the transition mechanism, and the three parts are connected with the static valve into a whole through the connecting device, so that the complex part processing is simplified.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic cross-sectional elevation view of a compound impact drilling acceleration tool according to one embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the valve according to the above embodiment;

FIG. 3 is a schematic view of the static valve according to the embodiment;

FIG. 4 is a schematic view of the hammer case according to the above embodiment;

fig. 5 is a schematic structural view of the impact hammer according to the above embodiment;

fig. 6 is a schematic structural view of the reversing sleeve according to the above embodiment;

FIG. 7 is a schematic view of the lower end cap according to the above embodiment;

fig. 8 is a schematic structural view of the lower joint in the above embodiment.

Reference numerals illustrate:

1. a sleeve; 1A, a sleeve center hole; 1B, sleeve threads; 1C, a second locking groove; 2. a valve cover; 3. a valve; 31. a valve-moving convex key; 32. a first ball groove; 33. a first flow channel; 4. a ball; 5. an upper nozzle; 6. a static valve; 61. a second ball groove; 62. a second flow channel; 63. a second bypass hole; 64. a reversing runner hole; 65. a static valve center hole; 66. a valve cover mounting hole; 67. a first connection hole; 7. a connecting bolt; 8. an axial seal ring; 9. a seal ring; 10. a hammer sleeve; 101. a second connection hole; 102. an impact cabin; 103. a first low pressure runner groove; 104. a second reversing flow channel groove; 11. a percussion hammer; 111. a hammer head; 112. an internal key; 113. hammer flow channel groove; 114. an inner key runner groove; 12. a reversing sleeve; 121. a key slot; 122. a first bypass hole; 123. positioning the step; 124. a clamp spring groove; 125. a reversing cabin; 126. a first reversing flow channel groove; 127. a second low pressure runner groove; 13. a lower end cap; 131. a third connection hole; 132. axially perforating; 133. a third low pressure runner groove; 134. an axial seal groove; 135. a fourth low pressure runner groove; 14. a lower nozzle; 15. a nut; 16. a radial seal ring; 17. a locking element; 18. a lower joint; 181. a fourth connection hole; 182. a fifth low pressure runner groove; 183. a connecting groove; 184. a radial seal groove; 185. a first locking groove; 186. and a lower joint convex key.

Detailed Description

The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.

It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.

As shown in fig. 1-8, the present invention provides a composite impact drilling acceleration tool comprising:

a sleeve 1 arranged at the bottom of the drill string and having an upper opening communicating with the drill string;

the static valve 6 is an axial through structure for fixing the inner sleeve at the upper part of the sleeve 1, and the top of the static valve is provided with second flow channel grooves 62 at intervals along the circumferential direction;

A moving valve 3 rotatably disposed at the top of the static valve 6 and communicated with the interior of the static valve 6 through an upper nozzle 5, wherein first flow channel grooves 33 are circumferentially spaced on the moving valve 3, and axially penetrate and correspondingly communicate with the second flow channel grooves 62;

the connecting component is fixed at the bottom of the static valve 6 and communicated with the upper part and the lower part through a lower nozzle 14, the upper part of the connecting component is of an annular structure which is sleeved in the sleeve 1 in a matched manner, the left side and the right side of the inner ring surface of the connecting component are symmetrically provided with impact cabins 102, and the lower part of the connecting component is connected and communicated with the top of the drill bit;

the impact hammer 11 is of an annular structure, hammerheads 111 corresponding to the impact cabin 102 are symmetrically arranged on the left side and the right side of the outer annular surface of the impact hammer and are matched with the inner sleeve at the upper part of the connecting assembly, and inner keys 112 are symmetrically arranged on the front side and the rear side of the inner annular surface of the impact hammer 11;

the reversing sleeve 12 is of an annular structure, reversing cabins 125 corresponding to the inner keys 112 are symmetrically arranged on the front side and the rear side of an outer ring at the lower part of the reversing sleeve, the reversing cabin is sleeved in the impact hammer 11 in a matched manner, the upper part of the reversing sleeve 12 is sleeved in the static valve 6 in a matched manner and is fixedly connected with the bottom of the movable valve 3, and two ends of the inner part of the reversing sleeve 12 are respectively communicated with the upper nozzle 5 and the lower nozzle 14;

The runner system is arranged in the sleeve 1 and is communicated with the upper nozzle 5 and the lower nozzle 14 through different runners, drilling fluid generates pressure drop when flowing through the lower nozzle 14, the reversing cabin 125 of the reversing sleeve is driven to do reciprocating rotation under the limitation of the inner key 112, and the hammer head 111 of the impact hammer does reciprocating rotation in the impact cabin 102.

In the above technical scheme, the sleeve 1 is of a hollow cylindrical structure, and the outside of the opening at the upper end of the sleeve is provided with a sleeve thread 1B for connecting an upper drill string; the middle part of the sleeve is provided with a sleeve center hole 1A which is communicated with the inside of the drill string along the axial direction and is used for enabling the drilling fluid above to smoothly flow in. A movable valve, a static valve and a connecting component are sequentially arranged in the sleeve from top to bottom, wherein the lower end of the connecting component is connected and communicated with the drill bit, the upper part of the connecting component is of an annular cylindrical structure, and the inner annular surface of the connecting component is provided with two symmetrical impact cabins 102 which are used for bearing the torsional impact force generated by the impact of the hammer heads 111 of the impact hammers 11 and transmitting the torsional impact force to the drill bit through the lower part of the connecting component; the impact hammer 11 is arranged in the inner cavity at the upper part of the connecting component, two symmetrical hammer heads 111 are arranged at the outer sides of the impact hammer, the impact hammer is correspondingly arranged in the two impact cabins during installation, and two symmetrical inner keys 112 are arranged at the inner sides of the impact hammer; the lower part of the reversing sleeve 12 is arranged in the impact hammer, two symmetrical reversing cabins 125 are arranged on the outer side of the lower part of the reversing sleeve, and two inner keys 112 of the impact hammer are respectively arranged in the reversing cabins 125 during assembly. The static valve is installed at the top of coupling assembling, and static valve 6 is through setting up in the static valve centre bore 65 at the middle part along the axial and link up, and the dynamic valve 3 is through setting up in the dynamic valve centre bore in the middle part along the axial, go up nozzle 5 and install in dynamic valve centre bore and communicate sleeve centre bore 1A and static valve centre bore, the dynamic valve bottom is equipped with the dynamic valve protruding key 31 along circumference interval, and it stretches into in the static valve centre bore 65 and is connected with its inside wall laminating, the upper portion cooperation of switching-over cover embolias in the static valve centre bore and upwards extend, the top of switching-over cover 12 still is equipped with keyway 121, its size with dynamic valve protruding key assorted, behind the keyway 121 at switching-over cover 12 top extended to static valve centre bore top with dynamic valve protruding key 31 cooperation joint to can drive the dynamic valve synchronous rotation when the switching-over cover is rotatory switching-over. The static valve and the moving valve are correspondingly provided with a first flow channel groove and a second flow channel groove which are respectively arranged at the outer sides of the central holes of the static valve and the moving valve, and the drilling fluid flows into the first flow channel groove from the central hole 1A of the sleeve through the second flow channel groove. Meanwhile, the drilling fluid flows into the reversing sleeve from the sleeve center hole 1A through the upper nozzle, and is communicated with the lower part of the lower nozzle/connecting assembly through different flow channels under the action of the flow channel system except for the reversing sleeve center hole, so that the drilling fluid generates pressure drop when flowing through the lower nozzle, and forms pressure difference around the impact hammer and the reversing sleeve to drive the reversing cabin of the reversing sleeve to do reciprocating rotation under the limit of an inner key, on one hand, the hammer heads of the impact hammer do reciprocating rotation in the impact cabin through the pressure difference in different directions formed by the switching of the flow channels, and therefore, the torsional impact force is generated on the drill bit by the impact cabin of the impact hammer head; on the other hand, the reversing sleeve can drive the movable valve to rotate around the axis of the movable valve, so that the second runner groove rotates relative to the first runner groove, the axial flow area between the second runner groove and the first runner groove changes periodically, the drilling fluid flowing through the reversing sleeve generates hydraulic pulse pressure to form axial impact load, and the generated axial impact force is transmitted to the drill bit through the movable valve 3, the static valve 6 and the connecting assembly.

According to the invention, on the basis of the torsional impact drilling speed-increasing tool, the two functions of axial impact and torsional impact are realized by utilizing the working characteristic of self-excitation reciprocating rotation of the reversing sleeve, the frequencies of the axial impact and the torsional impact generated by the tool are the same, the phenomenon of 'stick slip' of a drill bit is eliminated by the torsional impact, the abrasion of the drill bit is reduced, the depth of the drill bit is increased by high-frequency axial impact, the crack expansion of a stratum is promoted, and the rock breaking efficiency of the drill bit is further improved, so that the total length of the tool is effectively shortened under the condition of ensuring the speed-increasing effect; meanwhile, the parts in the sleeve are simple in structure, convenient to process and easy to assemble, the suitability of the tool and the drilling tool is improved, and the processing difficulty is reduced.

In another technical scheme, the composite impact drilling speed-increasing tool is characterized in that ball grooves are oppositely formed in the upper end face of the static valve 6 and the lower end face of the movable valve 3, the ball grooves are continuously arranged along the circumferential direction of the movable valve and form an annular space, a plurality of balls 4 are arranged in the ball grooves, and the movable valve 3 is coaxially arranged and rotationally connected with the static valve 6 through the balls 4. Specifically, the ball grooves include a second ball groove 61 provided on the stationary valve 6 and a first ball groove 32 provided on the movable valve 3. The movable valve 3 is of a disc-shaped structure, and the middle part of the movable valve 3 is provided with a movable valve center hole which is penetrated along the axial direction and is used for installing an upper nozzle; the upper end face of the static valve 6 is provided with a mounting groove for embedding a power valve, the middle of the mounting groove is provided with a static valve center hole 65 which is penetrated along the axial direction, the second flow channel groove 62 and the second ball groove 61 are arranged on the bottom plane of the mounting groove, and the second ball groove 61 is positioned between the second flow channel groove 62 and the static valve center hole 65. The size of any ball is matched with the cross section of the annular space formed by the two ball grooves, the movable valve is placed on the ball, and when the movable valve rotates relative to the static valve, the ball rolls in the annular space to reduce the friction resistance when the movable valve rotates. After the movable valve 3 is matched with the mounting groove embedded in the top of the static valve 6, the valve cover 2 can be additionally arranged at the top of the mounting groove, the valve cover mounting holes 66 (screw holes) are formed in the top of the static valve at intervals along the circumferential direction, and the valve cover 2 is fixed on the valve cover mounting holes 66 through screws and the bottom surface is abutted to the top surface of the movable valve, so that the axial positions of the movable valve and the static valve are further limited under the condition that the rotation of the movable valve is not affected, and the stop valve 3 floats upwards in the working process to affect the tightness of the runner groove.

In another technical scheme, the composite impact drilling speed-increasing tool is of a split structure, the upper part and the lower part of the connecting component are respectively provided with a hammer sleeve 10 and a lower joint 18, the lower joint 18 is fixedly sleeved at the lower part of the sleeve 1 and communicated with a drill bit through a central hole, and the hammer sleeve 10 is clamped between the lower joint 18 and the static valve 6; the lower end cover 13 is further arranged between the hammer sleeve and the lower joint, an axial perforation 132 is arranged in the middle of the lower end cover, the lower nozzle is arranged at the axial perforation and is communicated with the inside of the reversing sleeve and the central hole, and the static valve, the hammer sleeve, the lower end cover and the lower joint are axially locked and fixed through a connecting device.

The conventional drilling speed-increasing tool has the problems that the connecting assembly is of an integrated structure, the part structure is complex, and the processing and assembling difficulties are high. In the above technical scheme, the connecting assembly adopts a split type structure, the connecting assembly is divided into two parts for installation through the lower end cover 13, the top surface of the lower end cover 13 axially limits the hammer sleeve 10, the impact hammer 11 and the reversing sleeve 12, the bottom surface of the lower end cover 13 axially limits the lower joint 18, the internal structure of the connecting assembly is simplified, and the quick and accurate processing and convenient butt joint and installation of each part are facilitated. The central hole of the lower joint 18 is an axial through hole, the lower end of the central hole is provided with internal threads for being connected with a lower drill bit, and the upper end of the central hole of the lower joint extends into the sleeve 1 and is communicated with a lower nozzle. The hammer sleeve 10 is supported at the top of the lower joint 18 through the lower end cover 13, and the impact hammer 11 and the reversing sleeve 12 are sleeved in sequence inside the hammer sleeve 10. A plurality of groups of connecting holes are formed in the static valve 6, the hammer sleeve 10, the lower end cover 13 and the lower joint 18 at intervals along the circumferential direction, each group of connecting holes comprises a first connecting hole 67, a second connecting hole 101, a third connecting hole 131 and a fourth connecting hole 181, and the connecting holes are respectively arranged on the static valve, the hammer sleeve, the lower end cover and the lower joint, and the four connecting holes in the same group are correspondingly communicated along the axial direction; the first connecting hole 67 is a bolt counter bore and is arranged on the end face of the static valve 6, the second connecting hole 101 and the third connecting hole 131 are through holes, the fourth connecting hole 181 is arranged on the top face of the lower joint 18, and a connecting groove 183 is further arranged on the outer side wall of the lower joint and is correspondingly communicated with each fourth connecting hole 181. The connecting device comprises a plurality of connecting bolts 7, wherein the connecting bolts 7 are in one-to-one correspondence with the plurality of groups of connecting holes, any connecting bolt 7 sequentially penetrates through the corresponding four connecting holes, a top end nut of each connecting bolt 7 is clamped in a first connecting hole 67 (the nut is sunk into a bolt counter bore and seals the first connecting hole, the assembly of a static valve and other structures cannot be influenced), the bottom end of each connecting bolt penetrates through a fourth connecting hole 181 and then stretches into a connecting groove 183, and the bottom end of each connecting bolt can be locked upwards along the axial direction in the connecting groove correspondingly to install a nut 15, so that the axial locking and fixing of the static valve, a hammer sleeve, a lower end cover and a lower joint are realized, the mutual rotation of each part in the work is prevented, and the accuracy of relative axial positioning of each part is improved. In this embodiment, the plurality of groups of connection holes are provided as four groups of connection holes, and the connection device includes four connection bolts.

When the composite impact drilling speed-increasing tool is assembled, the impact hammer 11 and the reversing sleeve 12 can be sleeved into the hammer sleeve 10, the lower end cover 13 and the lower joint 18 are arranged at the bottom of the impact hammer, the static valve 6 and the movable valve 3 are arranged at the top of the hammer sleeve 10, namely, the impact hammer and the reversing sleeve are relatively positioned and arranged, then the static valve 6, the hammer sleeve 10, the lower end cover 13 and the lower joint 18 are connected into a whole through a connecting device, and then the whole is sleeved into the sleeve, and the whole axial positioning of all parts in the sleeve can be realized through the fixed connection of the lower joint and the sleeve, so that the whole structure formed by the static valve, the hammer sleeve, the lower end cover and the lower joint in working is prevented from rotating relative to the sleeve, and the whole working stability of the tool is improved.

In another technical scheme, the lower joint 18 is detachably connected with the sleeve 1 through a locking device, and the locking device comprises two locking grooves which are oppositely arranged on the outer ring surface of the lower joint 18 and the inner side wall of the sleeve 1 and form annular empty grooves along the circumferential direction of the two locking grooves; the locking elements 17 are continuously arranged inside the annular empty groove along the circumferential direction of the annular empty groove, and any locking element 17 is matched and clamped with the annular empty groove. Wherein, the two locking grooves comprise a first locking groove 185 arranged on the outer ring surface of the lower joint and a second locking groove 1C arranged on the inner side wall of the sleeve, and the installation height positions of the two locking grooves are corresponding. The first locking groove 185 is located below the connecting groove 183 to facilitate the installation of the lower connector and the sleeve. The outer side wall of the sleeve is provided with a mounting opening communicated with the annular empty groove, the size of the mounting opening is slightly larger than that of a single locking element, the locking element can be arranged in the annular empty groove through the mounting opening, and the last locking element is pushed to slide along the circumferential direction of the annular empty groove when the next locking element is arranged until all the annular empty grooves are filled with the locking elements. The cross section of the locking blocks can be set to be of a round or square structure, in the embodiment, the locking elements are fan-shaped annular locking blocks matched with the cross section of the annular empty groove in size, the central angle of each locking block is 9 degrees, and the annular empty groove can be filled by adopting 40 locking blocks. Simultaneously, after all locking elements are installed, the plug is installed at the installation opening, the outer ring surface of the plug is provided with a male thread, the sleeve installation opening is provided with a female thread, the plug is screwed into the sleeve installation opening until the plug is abutted with the outer surface of the locking element, locking stability can be ensured, and the locking element is prevented from being thrown out by the composite impact drilling acceleration tool during drilling operation. Therefore, the connecting device is used for simultaneously limiting the connection between the lower joint and the sleeve in multiple directions (radial and axial directions), ensuring the connection stability, providing stable support and limiting foundation for the installation of the inner structure of the sleeve, and being beneficial to the rapid and convenient installation or disassembly of the sleeve and the lower joint.

In addition, the bottom outside of lower clutch 18 is equipped with a plurality of lower clutch convex keys 186 along circumference interval, and arbitrary lower clutch convex key is protruding upwards, and the bottom outside of sleeve 1 is equipped with a plurality of concave keys along circumference interval, its with a plurality of lower clutch convex keys one-to-one, telescopic concave key and the corresponding lower clutch convex key along axial cooperation joint when the equipment, the up end of lower clutch convex key 186 and the top face contact of concave key for the transmission weight on bit, the side of lower clutch convex key 186 and the side contact of concave key for the transmission moment of torsion, further improved lower clutch and telescopic positioning accuracy and connection stability.

In another technical scheme, the composite impact drilling speed-increasing tool, the impact cabin, the hammer head, the internal key and the reversing cabin are of mutually matched fan-shaped structures, the central angle of the impact cabin is larger than that of the hammer head, and the central angle of the reversing cabin is larger than that of the internal key. Therefore, when the impact hammer performs reciprocating rotary motion, two sides of the hammer head can be in adaptive joint with two sides of the impact cabin in an alternating manner, a flow passage space is formed at the other side of the impact cabin, and torsion impact force is effectively transmitted; similarly, when the reversing sleeve performs reciprocating rotary motion, two sides of the reversing cabin can be matched and abutted with two sides of the inner key in an alternating manner, and a flow passage space is formed at the other side of the reversing cabin.

In another technical scheme, the composite impact drilling acceleration tool, the static valve 6 has a dumbbell structure, the middle part of the static valve is contracted inwards and forms an annular cavity with the inner side wall of the sleeve 1, and the runner system comprises:

two groups of bypass holes are respectively arranged at the upper part of the reversing sleeve 12 and the middle part of the static valve 6, and the two groups of bypass holes are correspondingly arranged and communicated with the interior of the reversing sleeve 12 and the annular cavity;

four reversing flow passage holes 64 provided at intervals in the circumferential direction on the bottom surface of the annular cavity;

two sets of inner key runner grooves 114 corresponding to the two inner keys 112, wherein any set of inner key runner grooves 114 comprises two inner key runner grooves which are respectively and closely arranged at two sides of the corresponding inner key 112, and any inner key runner groove 114 is communicated with the inner ring surface and the outer ring surface of the impact hammer 11;

two sets of hammer flow channel grooves 113, which respectively correspond to the two hammers 111, wherein any set of hammer flow channel grooves comprises two hammer flow channel grooves 113 which are respectively and closely arranged at two sides of the corresponding hammers 111, and any hammer flow channel groove 113 is communicated with the inner ring surface and the outer ring surface of the impact hammer 11;

two sets of first reversing flow channel grooves 126, which are arranged at the lower part of the reversing sleeve 12 corresponding to the two sets of hammer flow channel grooves 113, wherein any one set of first reversing flow channel grooves 126 comprises two first reversing flow channel grooves, which are arranged corresponding to the two hammer flow channel grooves 113 of the same set, and any one first reversing flow channel groove 126 is communicated with the inner ring surface and the outer ring surface of the reversing sleeve 12;

Two sets of second reversing flow channel grooves 104, which are arranged on the inner ring surface of the upper part of the connecting assembly in correspondence with the two sets of inner key flow channel grooves 114, wherein any set of second reversing flow channel grooves 104 comprises two second reversing flow channel grooves which are arranged in correspondence with the two inner key flow channel grooves 114 of the same set, and four second reversing flow channel grooves 104 are communicated with the four reversing flow channel holes 64 in a one-to-one correspondence manner;

two reversing cabin low-pressure flow passages which are arranged on the inner ring surface of the upper part of the connecting component corresponding to the two groups of inner key flow passage grooves 114, wherein any reversing cabin low-pressure flow passage is positioned between the two corresponding second reversing flow passage grooves 104 and communicated with the upper part and the lower part of the connecting component;

the two groups of impact cabin low-pressure flow channels are arranged at the lower part of the reversing sleeve 12 corresponding to the two groups of hammer head flow channel grooves, any one group of impact cabin low-pressure flow channels comprise two impact cabin low-pressure flow channels which are positioned at two sides of the corresponding group of first reversing flow channel grooves and are arranged corresponding to the two hammer head flow channel grooves 113 of the same group, and any impact cabin low-pressure flow channel is communicated with the upper part and the lower part of the connecting component;

when the two sides of the hammer 111 alternately rotate to abut against the two sides of the impact cabin 102, the same group of hammer runner grooves 113 alternately communicate with the corresponding impact cabin 102, and the same inner key runner grooves 114 alternately communicate with the corresponding first low-pressure runner grooves 103 and second reversing runner grooves 104; when the two sides of the reversing cabin 125 alternately rotate to be abutted with the two sides of the inner key 112, the same group of first reversing flow channel grooves 126 are alternately communicated with the corresponding hammer flow channel grooves 113, the same group of impact cabin low-pressure flow channels are alternately communicated with the corresponding hammer flow channel grooves 113, and the same group of inner key flow channel grooves 114 are alternately communicated with the corresponding reversing cabin 125.

In the above technical solution, the bypass hole on the reversing sleeve 12 is a first bypass hole 122, and the bypass hole on the static valve is a second bypass hole 63; any set of bypass holes comprises a plurality of bypass holes arranged at intervals along the circumference of the reversing sleeve/static valve, and in the embodiment, one set of bypass holes is two bypass holes which are symmetrically arranged at two sides of the reversing sleeve/static valve.

In the initial state, the hammer head 111 of the impact hammer is abutted against one side of the impact cabin 102, at the moment, the corresponding first reversing flow channel groove 126 on the side is communicated with the hammer head flow channel groove 113 and is filled with high-pressure drilling fluid, the first reversing flow channel groove on the other side is not communicated with the hammer head flow channel groove, the other side of the impact cabin 102 is communicated with the corresponding impact cabin low-pressure flow channel through the hammer head flow channel groove 113 on the other side, so that a pressure difference is formed on two sides of the hammer head (the impact cabin), the hammer head 111 is driven to rotate clockwise to the other side of the impact cabin, meanwhile, the reversing sleeve is driven to rotate clockwise through an inner key, the space on the other side of the impact cabin is gradually compressed in the rotating process, and the drilling fluid in the impact cabin is discharged through the corresponding impact cabin low-pressure flow channel; when the hammer 111 rotates to abut against the other side of the impact chamber 102, the inner key 112 also abuts against one side of the reversing chamber 125 near the clockwise direction, at this time, the inner key runner groove 114 on the side (the side where the inner key abuts against the reversing chamber) communicates with the corresponding second reversing runner groove 104, the inner key runner groove 114 on the other side communicates with the corresponding reversing chamber low pressure runner and the other side of the reversing chamber 125 at the same time, so that a pressure difference is formed on both sides of the inner key 114, the inner reversing sleeve 12 continues to rotate in the clockwise direction (relative to the impact hammer) under the action of inertia and the runner pressure difference until the inner key 112 abuts against one side of the reversing chamber 125 near the counterclockwise direction (during the rotation of the reversing sleeve, drilling fluid in the reversing chamber, the inner key runner groove and the second reversing runner groove can be continuously discharged downwards through the reversing chamber low pressure runner), the rotation of the reversing sleeve 12 enables the first reversing flow channel 126 and the low-pressure flow channel of the impact cabin to synchronously rotate, at this time, the hammer head flow channel 113 on the original side (close to the anticlockwise direction) is disconnected from the first reversing flow channel 126 and is communicated with the low-pressure flow channel of the impact cabin on the same side, so that the high-pressure side is changed into the low-pressure side, the first reversing flow channel 126 on the other side (close to the clockwise direction) is communicated with the corresponding hammer head flow channel 113 and is filled with high-pressure drilling fluid, a reverse pressure difference is formed, and likewise, the hammer head 111 is driven to rotate anticlockwise and drive the reversing sleeve 12 to return to an initial state, namely, the hammer head rotates to be abutted with the original side of the impact cabin firstly, and then the reversing sleeve continuously rotates anticlockwise under the action of inertia and pressure difference until the inner key is abutted with the other side of the reversing cabin. The process automatically circulates under the continuous circulation of drilling fluid, namely, the reversing cabin of the reversing sleeve performs reciprocating rotary motion under the limit of the inner key, the hammer head of the impact hammer performs reciprocating rotary motion in the impact cabin, and further the torsion impact function of the tool is realized.

In addition, when the connecting assembly adopts a split structure formed by the hammer sleeve, the lower connector and the lower end cover, the same reversing cabin low-pressure runner comprises a first low-pressure runner groove 103 arranged on the hammer sleeve 10, a third low-pressure runner groove 133 arranged on the lower end cover and a fifth low-pressure runner groove 182 arranged on the lower connector, which are positioned on inner annular surfaces on two sides of the central hole, and the three parts are mutually communicated along the axial direction, the cross sections of the first low-pressure runner groove 103, the third low-pressure runner groove 133 and the fifth low-pressure runner groove 182 are of semicircular structures, and the first low-pressure runner groove 103, the third low-pressure runner groove 133 and the fifth low-pressure runner groove 182 are relatively fixedly communicated along the axial direction under the locking action of the connecting device so as to smoothly discharge drilling fluid circulated in the second reversing runner groove 104, the inner key runner groove 114 and the reversing cabin 125 into the central hole of the lower connector 18 downwards in the rotating process. The same group of impact cabin low-pressure flow channels comprise two second low-pressure flow channel grooves 127 arranged on the reversing sleeve body and a fourth low-pressure flow channel groove 135 arranged on the lower end cover 13, which are mutually communicated along the axial direction, in the embodiment, the fourth low-pressure flow channel groove 135 is an arc-shaped groove arranged outside an axial perforation 132 of the lower end cover 13 so as to adapt to the relative rotation of the second low-pressure flow channel grooves 127 on the reversing sleeve, and ensure that the fourth low-pressure flow channel groove 135 is always communicated with the second low-pressure flow channel groove 127 corresponding to the upper part; meanwhile, the size of the central hole of the lower joint 18 covers the range of the fourth low pressure runner slot 135, and when the hammer 111 rotates, the low pressure drilling fluid in the impact chamber 102 is guided to the second low pressure runner slot 127 through the hammer runner slot 113, and can be directly discharged into the central hole of the lower joint 18 after being communicated through the fourth low pressure runner slot 135.

In another aspect, the compound percussion drilling acceleration tool further comprises a seal assembly comprising: a radial seal ring 16 provided between a lower portion of the connection assembly and the sleeve 1 in a circumferential direction of the sleeve 1; an axial seal ring 8 is provided between the lower end surface of the static valve 6 and the upper end surface of the connection assembly in the circumferential direction of the sleeve 1. Wherein, be equipped with radial seal groove 184 between coupling assembling's lower part periphery and the sleeve for the location is installed radial seal circle 16, prevents inside drilling fluid seepage. An axial sealing ring 8 is arranged between the upper end face of the connecting component and the lower end face of the static valve and is used for preventing drilling fluid between the static valve and the reversing sleeve from flowing into a gap between the static valve and the sleeve along the radial direction of the static valve.

In addition, when the connecting assembly adopts a split structure composed of the hammer sleeve, the lower connector and the lower end cover, the radial seal groove 184 is arranged between the connecting groove 183 and the first locking groove 185, and the radial seal ring 16 is correspondingly clamped in the radial seal groove 184, so that the phenomenon that the drilling fluid enters a gap between the sleeve and the lower connector to generate erosion is prevented, and the influence on the connection effectiveness caused by the penetration of the drilling fluid into the locking element is also avoided; the upper and lower end surfaces of the lower end cover are respectively provided with an axial sealing groove 134 along the circumferential direction, which is positioned at the outer sides of the fourth low-pressure flow channel groove 135 and the third low-pressure flow channel groove 133, so that an axial sealing ring 8 is also arranged between the lower end cover and the lower joint and between the lower end cover and the hammer sleeve, and is correspondingly clamped in the two axial sealing grooves 134, thereby preventing low-pressure drilling fluid which is transitionally communicated by the lower end cover from penetrating into the gap between the lower end cover and the sleeve.

In another technical scheme, the outer diameter of the lower part of the reversing sleeve 12 is larger than the outer diameter of the upper part of the reversing sleeve 12, the reversing cabin 102 is communicated with the space outside the upper part of the reversing sleeve 12, the lower part of the reversing sleeve is lower than the upper part of the connecting assembly, and the bottom of the static valve 6 is matched and clamped with the positioning step 123 between the upper part and the lower part of the reversing sleeve 12 through the sealing ring 9. Because the inside bellied internal key that is equipped with of jump bit, under the lower part needs the cooperation cover to establish in the jump bit inside (namely the lower part outer ring face of jump bit and the laminating of jump bit inner ring face) of reversing sleeve, conventional structure is difficult to realize the cooperation installation of reversing sleeve and jump bit, consequently, set up the reversing sleeve into the thick upper end of lower extreme slim structure, and reversing cabin and the upper portion outside space intercommunication of reversing sleeve, thereby, can embolia the reversing sleeve from down upwards inside the jump bit when the installation, make the internal key block into the reversing cabin smoothly along the axial and carry out one-way spacing (restriction reversing sleeve along axially ascending removal), make things convenient for the cooperation installation of reversing sleeve and jump bit, the bottom support of reversing sleeve is in coupling assembling's upper portion bottom surface department (restriction reversing sleeve along axially downwardly moving), further improved the axial spacing stability of reversing sleeve. Meanwhile, the lower part of the reversing sleeve is lower than the upper part of the connecting assembly, a height difference is formed at the connecting end face of the connecting assembly and the static valve, a clamp spring groove 124 is correspondingly arranged at a positioning step 123, then the sealing ring 9 is positioned and installed on the positioning step 123 between the upper part and the lower part of the reversing sleeve 12 through the clamp spring groove 124, and the axial sealing between a bypass hole and a reversing cabin on the reversing sleeve can be realized while the butt joint installation of the static valve and the connecting assembly is not influenced, and the sealing performance between different flow channels is improved.

In this embodiment, the compound percussion drilling acceleration tool comprises: sleeve 1, valve gap 2, dynamic valve 3, ball 4, upper nozzle 5, static valve 6, connecting bolt 7, axial sealing ring 8, sealing ring 9, hammer sleeve 10, impact hammer 11, reversing sleeve 12, lower end cover 13, lower nozzle 14, nut 15, radial sealing ring 16, locking element 17 and lower joint 18. Wherein the lower end of the sleeve 1 and the lower joint 18 are axially fixed through a locking element 17; the lower end cover 13 is arranged at the top end of the lower joint 18; the hammer sleeve 10, the impact hammer 11 and the reversing sleeve 12 are sequentially arranged at the top end of the lower end cover 13 from outside to inside; the static valve 6 is arranged above the hammer sleeve 10, and a plurality of balls 4 are arranged between the movable valve 3 and the static valve 6; the movable valve 3 and the reversing sleeve 12 are fixed in the circumferential direction and rotate along with the reversing sleeve 12; the static valve 6, the hammer sleeve 10, the lower end cover 13 and the lower joint 18 are axially fixed by the connecting bolts 7.

In actual operation, the drilling fluid flows in from the central hole 1A at the upper end of the sleeve, flows through the lower nozzle 14, forms high-pressure drilling fluid and low-pressure drilling fluid, conducts the high-pressure drilling fluid to one side of the hammer 111 through the first reversing flow channel 126 and the hammer flow channel 113, meanwhile conducts the other side of the hammer 111 with the low-pressure drilling fluid, and the impact hammer 11 rotates clockwise at a high speed around the tool axis under the action of the high-pressure drilling fluid and the low-pressure drilling fluid. Meanwhile, the impact hammer 111 drives the reversing sleeve 12 to synchronously rotate through the inner key 112, the hammer head 111 impacts the side face of the impact cabin 102 to generate a torsion impact force, the torsion impact force is transmitted to the drill bit through the connecting bolt 7 and the lower joint 18, and the phenomenon of 'stick-slip' of the drill bit is eliminated. After the impact hammer 11 is impacted and stopped, the reversing sleeve 12 continues to rotate clockwise under the combined action of inertia and drilling fluid pressure difference, the other side of the reversing cabin 125 of the reversing sleeve is contacted with the other side of the inner key 112 of the impact hammer, high-pressure drilling fluid is conducted to the other side (originally low pressure) of the hammer 111 through the first reversing flow channel 126 and the hammer flow channel 113, and the original low-pressure side of the hammer 111 is conducted with the low-pressure drilling fluid, so that high-pressure and low-pressure channels of the drilling fluid at two sides of the hammer 111 are exchanged. The impact hammer 11 starts to rotate anticlockwise around the tool axis under the action of the high and low pressure of the drilling fluid, and impacts the other side surface of the impact cabin 102, and after the impact is stopped, the high and low pressure exchange of the drilling fluid on the two sides of the hammer head 111 is realized again. By so cycling, the tool continues to generate high frequency torsional impact forces and transmits them to the drill bit through self-exciting reciprocating rotation of the reversing sleeve 12.

Simultaneously, the key groove 121 drives the movable valve 3 to synchronously and reciprocally rotate, and the axial flow area formed by the first flow channel groove 33 on the movable valve 3 and the second flow channel groove 62 on the static valve 6 is also changed, so that hydraulic pulse pressure of drilling fluid is generated, and axial impact force is formed and transmitted to the drill bit through the movable valve 3, the static valve 6, the hammer seat 10, the lower end cover 13 and the lower connector 18.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (8)

1. A composite impact drilling acceleration tool, comprising:

a sleeve arranged at the bottom of the drill string and with an opening at the upper end communicated with the drill string;

the static valve is an axial through structure for fixing the inner sleeve at the upper part of the sleeve, and the top of the static valve is provided with second flow channel grooves at intervals along the circumferential direction;

the movable valve is rotatably arranged at the top of the static valve and is communicated with the inside of the static valve through an upper nozzle, and first flow channel grooves are circumferentially arranged on the movable valve at intervals, axially penetrate through and are correspondingly communicated with the second flow channel grooves;

The connecting component is fixed at the bottom of the static valve and communicated with the upper part and the lower part through a lower nozzle, the upper part of the connecting component is of an annular structure which is sleeved in the sleeve in a matched manner, impact cabins are symmetrically arranged on the left side and the right side of the inner ring surface of the connecting component, and the lower part of the connecting component is connected and communicated with the top of the drill bit;

the impact hammer is of an annular structure, hammerheads corresponding to the impact cabin are symmetrically arranged on the left side and the right side of the outer annular surface of the impact hammer and matched with the inner sleeve at the upper part of the connecting assembly, and inner keys are symmetrically arranged on the front side and the rear side of the inner annular surface of the impact hammer;

the reversing sleeve is of an annular structure, reversing cabins corresponding to the inner keys are symmetrically arranged on the front side and the rear side of an outer ring of the lower part of the reversing sleeve, the reversing cabin is sleeved in the impact hammer in a matched mode, the upper part of the reversing sleeve is sleeved in the static valve in a matched mode and is fixedly connected with the bottom of the movable valve, and two ends of the inner part of the reversing sleeve are respectively communicated with the upper nozzle and the lower nozzle;

the flow passage system is arranged in the sleeve and communicated with the upper nozzle and the lower nozzle through different flow passages, drilling fluid generates pressure drop when flowing through the lower nozzle, the reversing cabin of the reversing sleeve is driven to do reciprocating rotation under the limit of the inner key, and the hammer head of the impact hammer does reciprocating rotation in the impact cabin.

2. The compound impact drilling speed increasing tool according to claim 1, wherein ball grooves are oppositely arranged on the upper end face of the static valve and the lower end face of the movable valve, the ball grooves are continuously arranged along the circumferential direction of the movable valve and form an annular space, a plurality of balls are arranged in the ball grooves, and the movable valve is coaxially arranged and rotationally connected with the static valve through the plurality of balls.

3. The composite impact drilling speed-increasing tool according to claim 1, wherein the connecting component is of a split structure, an upper part and a lower part of the connecting component are respectively provided with a hammer sleeve and a lower joint, the lower joint is fixedly sleeved on the lower part of the sleeve and communicated with a drill bit through a central hole, and the hammer sleeve is clamped between the lower joint and the static valve; the rotary hammer is characterized in that a lower end cover is further arranged between the hammer sleeve and the lower connector, an axial perforation is arranged in the middle of the lower end cover, the lower nozzle is arranged at the axial perforation and is communicated with the reversing sleeve and the central hole, and the static valve, the hammer sleeve, the lower end cover and the lower connector are locked and fixed along the axial direction through a connecting device.

4. A compound impact drilling speed increaser as claimed in claim 3, wherein the lower joint is detachably connected with the sleeve by a locking device, the locking device comprises two locking grooves which are oppositely arranged on the outer ring surface of the lower joint and the inner side wall of the sleeve and form annular empty grooves along the circumference thereof; the locking elements are continuously arranged inside the annular empty groove along the circumferential direction of the annular empty groove, and any locking element is matched and clamped with the annular empty groove.

5. The composite impact drilling acceleration tool of claim 1, wherein the impact pod and the hammer head, the internal key and the reversing pod are of mutually matched sector ring structures, the central angle of the impact pod is larger than the central angle of the hammer head, and the central angle of the reversing pod is larger than the central angle of the internal key.

6. The compound impact drilling acceleration tool of claim 1, wherein the static valve is of dumbbell-shaped configuration with a central portion that contracts inwardly and forms an annular cavity with the sleeve inner sidewall, the flow channel system comprising:

the two groups of bypass holes are respectively arranged at the upper part of the reversing sleeve and the middle part of the static valve, and are mutually and correspondingly arranged and communicated with the interior of the reversing sleeve and the annular cavity;

four reversing runner holes which are circumferentially arranged on the bottom surface of the annular cavity at intervals;

two groups of inner key runner grooves which respectively correspond to the two inner keys, wherein any group of inner key runner grooves comprises two inner key runner grooves which are respectively and closely arranged at two sides of the corresponding inner key, and any inner key runner groove is communicated with the inner ring surface and the outer ring surface of the impact hammer;

two groups of hammer head runner grooves which respectively correspond to the two hammer heads, wherein any group of hammer head runner grooves comprise two hammer head runner grooves which are respectively and closely arranged at two sides of the corresponding hammer heads, and any hammer head runner groove is communicated with the inner ring surface and the outer ring surface of the impact hammer;

Two groups of first reversing flow passage grooves are correspondingly arranged at the lower part of the reversing sleeve with the two groups of hammer flow passage grooves, any one group of first reversing flow passage grooves comprises two first reversing flow passage grooves which are correspondingly arranged with the two hammer flow passage grooves of the same group, and any one first reversing flow passage groove is communicated with the inner ring surface and the outer ring surface of the reversing sleeve;

two groups of second reversing flow passage grooves which are correspondingly arranged on the inner ring surface of the upper part of the connecting component with the two groups of inner key flow passage grooves, wherein any group of second reversing flow passage grooves comprises two second reversing flow passage grooves which are correspondingly arranged with the two inner key flow passage grooves of the same group, and four second reversing flow passage grooves are correspondingly communicated with the four reversing flow passage holes one by one;

the two reversing cabin low-pressure flow channels are arranged on the inner ring surface of the upper part of the connecting component corresponding to the two groups of inner key flow channel grooves, and any reversing cabin low-pressure flow channel is positioned between the two corresponding second reversing flow channel grooves and communicated with the upper part and the lower part of the connecting component;

the two groups of impact cabin low-pressure flow channels are arranged at the lower part of the reversing sleeve corresponding to the two groups of hammer head flow channel grooves, any one group of impact cabin low-pressure flow channels comprise two impact cabin low-pressure flow channels which are positioned at two sides of a corresponding group of first reversing flow channel grooves and are arranged corresponding to the two hammer head flow channel grooves of the same group, and any impact cabin low-pressure flow channel is communicated with the upper part and the lower part of the connecting assembly;

When the two sides of the hammer head alternately rotate to be abutted with the two sides of the impact cabin, the same group of hammer head runner grooves are alternately communicated with the corresponding impact cabin, and the same inner key runner grooves are alternately communicated with the corresponding first low-pressure runner grooves and the corresponding second reversing runner grooves; when two sides of the reversing cabin alternately rotate to be abutted with two sides of the inner key, the same group of first reversing flow channel grooves are alternately communicated with the corresponding hammer flow channel grooves, the same group of impact cabin low-pressure flow channels are alternately communicated with the corresponding hammer flow channel grooves, and the same group of inner key flow channel grooves are alternately communicated with the corresponding reversing cabin.

7. The compound percussion drilling acceleration tool of claim 6, further comprising a seal assembly comprising: a radial seal ring provided between a lower portion of the connection assembly and the sleeve in a circumferential direction of the sleeve; the axial sealing ring is arranged between the lower end face of the static valve and the upper end face of the connecting assembly along the circumferential direction of the sleeve.

8. The composite impact drilling speed increasing tool according to claim 6, wherein the outer diameter of the lower part of the reversing sleeve is larger than the outer diameter of the upper part, the reversing cabin is communicated with the outer space of the upper part of the reversing sleeve, the lower part of the reversing sleeve is lower than the upper part of the connecting assembly, and the bottom of the static valve is matched and clamped with the positioning step between the upper part and the lower part of the reversing sleeve through a sealing ring.