CN106223832B - composite impact drilling tool - Google Patents

Abstract

The present invention is a composite percussion drilling tool, which comprises a middle outer casing, the upper end of which is fixedly connected with an upper nipple, a connecting pipe goes upward through the upper nipple and is fixedly connected with an upper outer casing; the bottom of the middle outer casing is hung with a drill seat ; The inner wall of the connecting pipe is fixed with a diversion seat, the inner wall of the diversion seat is sleeved with a cylindrical commutator, and the outer wall of the diversion seat is sleeved with a cylindrical pendulum; a cylindrical hammer is sleeved on the outer side of the cylindrical pendulum; An impact cylinder is arranged in the subbody cavity; both the cylindrical commutator and the cylindrical pendulum extend into the interior of the impact cylinder. In the composite impact drilling tool of the present invention, the axial impact is formed by the high-speed impact of a large axial cylindrical hammer. It is a mechanical impact, which can effectively transmit the impact load to the drill bit, and the impact load is enough to directly break rock; and the circumferential impact and axial impact of the drilling tool are controlled by a cylindrical commutator, the frequency of the two impact loads is equal, and the rock breaking efficiency is higher.

Description

Compound Impact Drilling Tools

technical field

The invention relates to a downhole drilling tool in the field of petroleum development, in particular to a composite percussion drilling tool.

Background technique

In oil drilling engineering, the improvement of ROP is an eternal goal. At present, the oil drilling method is to drive the drill bit to rotate through the drill pipe, and to shear and impact the rock through the drill bit to achieve rock breaking. The broken rock is carried out of the surface by the drilling fluid. The whole drilling process is that the drill bit is pressed against the upper end of the rock by the static pressure provided by the drill string, and the torque transmitted to the drill bit through the drill string drives the drill bit to rotate. The driving methods include rotary table, top drive and downhole motor.

The drill bit is the most important part of the entire drilling process, which is directly related to the efficiency of rock breaking. The PDC drill bit is a drill bit that is widely used and has a better effect at present, and it mainly realizes rock breaking by shearing the rock. The parameters that affect the rock-breaking efficiency of PDC bit mainly include WOB and torque. WOB is the main parameter affecting the depth of rock penetration by the cutting edge of PDC bit. The depth of penetration can be understood as the volume of rock cut in a single circle. The deeper the cutting edge penetrates into the rock, the higher the ROP. The torque is a parameter that affects the cutting efficiency. The higher the torque, the greater the shear force, the smoother the rock cutting, and the smaller the fluctuation of the drill bit rotation.

It is generally believed that the PDC bit is suitable for drilling in soft and soft formations, and is not suitable for drilling in hard formations. When drilling hard formations, it is prone to: 1) The rotation of the drill bit fluctuates greatly, and the stick-slip vibration is more serious; 2) The drill bit The penetration depth is not enough, and the ROP is low. The above are the reasons for limiting the use of PDC drill bits in hard formations.

At present, when drilling into hard formations, roller cone bits or diamond bits are generally used. In hard formations, the main rock breaking methods of these two kinds of bits are impact and grinding. Although these two kinds of bits can break hard It is a stratum, but the rock-breaking efficiency is not very high.

In order to increase the ROP in hard formations, drilling with PDC bits is an effective method, but at the same time, it is necessary to solve the two problems of stick-slip vibration and insufficient penetration depth of PDC bits when drilling into hard formations.

In order to solve the problem of low ROP in hard formations, some scholars have proposed and designed rotary percussion drilling tools. This tool increases axial impact on the basis of rotary drilling and transmits it to the drill bit. To achieve volumetric rock breaking of rocks, these tools can be divided into two categories according to their working principles: valve impactors and jet impactors. This type of tool has been applied in the field and has a certain speed-up effect, but there are also some problems, mainly including: 1) The impact energy is relatively large, and the service life of the drill bit cannot meet the requirements of field application; 2) The large impact energy It poses a challenge to the service life of the bottom hole assembly (BHA); 3) it is not conducive to the construction of the deflection work.

In order to suppress the stick-slip vibration of the PDC bit, torsional impactors have been developed at home and abroad, and have been applied in the field. The working principle of this tool is to provide high-frequency reciprocating torsional impact at the PDC bit, reducing the torque fluctuation at the bit. At present, this tool has been applied in the field, and the use effect is good, but the tool only has the effect of vibration reduction, and the improvement of the ROP in hard formations is limited.

The inventor has applied for a patent titled "composite impact drilling tool (CN 204457422U)". The axial impact is a pulsed jet flow formed by a specific structure and hits the shell. Due to the rheology of the fluid, the resulting The impact load generated is small, and the energy transmitted to the drill bit is limited, which is not enough to directly break rocks. Its main function is to reduce vibration and drag; at the same time, the frequencies of the axial impact and torsional impact of the drilling tool are different, and the two impact loads are independent of each other. Work, rock breaking efficiency is limited. The inventor has applied for a patent titled "composite impact drilling tool (CN103953281B)". The compound impact in this patent is implemented by a cam mechanism. Because the impact energy required for rock breaking is relatively large, the cam mechanism is prone to wear and tear. Severe and premature failure occurs, which seriously limits the field use of the tool.

Based on the problems raised above, the present inventor has relied on years of experience and practice in related industries, combined with the characteristics of rotary percussion drilling tools and torsion impactors, in order to improve the ROP of hard formations, proposed and designed a compound percussion drilling tools to overcome the deficiencies of the prior art.

Contents of the invention

The object of the present invention is to provide a composite percussion drilling tool to improve the rock-breaking efficiency of hard formations and reduce the drilling cost of hard formations.

Another object of the present invention is to provide a compound percussion drilling tool, which can suppress the stick-slip vibration of the PDC drill bit, improve the stability of the drilling tool, and prolong the service life.

The purpose of the present invention is achieved in this way, a composite percussion drilling tool, the composite percussion drilling tool includes a middle part of the outer casing that penetrates up and down, the inner wall of the middle part of the outer casing is provided with a first annular boss protruding inward, the first The ring-shaped boss divides the inner cavity of the middle shell into an upper cavity and a lower cavity; the upper end of the middle shell is fixedly connected with an upper nipple, and the small end of a stepped connecting pipe passes upward through the center hole of the upper nipple, and connects with an upper and lower The lower end of the through upper casing is fixedly connected; the bottom of the middle casing is hung with a drill seat;

The inner wall of the stepped connecting pipe is fixedly connected with a diversion seat that penetrates up and down. The inner wall of the diversion seat is covered with a cylindrical commutator, and the top end of the cylindrical commutator is stopped by the first flange of the inner wall of the diversion seat; A cylindrical pendulum is set on the outer wall of the seat, and the top end of the cylindrical pendulum stops against the second flange on the outer wall of the flow guide seat; both the cylindrical commutator and the cylindrical pendulum pass downward through the first annular ring of the middle outer shell. The boss extends to the lower cavity of the middle outer shell, and the first annular boss is in sealing and sliding contact with the outer wall of the cylindrical pendulum;

On the outside of the cylindrical pendulum and in the upper chamber of the middle outer shell, a cylindrical hammer is sleeved to slide up and down. The inner wall of the cylindrical hammer is provided with a second annular boss protruding inward, and the second annular boss seals and slides It is arranged on the outer wall of the cylindrical pendulum, and the outer wall of the cylindrical hammer is in sealing sliding contact with the inner wall of the middle outer shell, and the first annular cavity and the second annular cavity are respectively formed above and below the second annular boss;

There is an impact cylinder in the lower chamber of the middle outer shell, and the base of the impact cylinder is provided with a through hole that penetrates up and down; the upper section of the through hole is clamped with a hollow nozzle support seat, and the lower section of the through hole forms a polygonal hole connected with the drill seat ; Both the cylindrical commutator and the cylindrical pendulum extend into the interior of the impact cylinder, and the bottom end of the cylindrical commutator is against the card edge of the outer wall of the nozzle support seat; the bottom end of the cylindrical pendulum is against the impact cylinder the upper surface of the base.

In a preferred embodiment of the present invention, a suspension nipple is fixedly provided at the bottom of the middle outer casing, and the upper part of the drill bit seat passes through the suspension nipple upwards and is connected with an anti-falling fish, and the anti-falling fish can be hung On top of the suspension nipple.

In a preferred embodiment of the present invention, the outer wall of the drill seat and the inner wall of the suspension nipple are connected by splines; the anti-falling fish is a ring structure formed by butting two symmetrical semi-circular rings.

In a preferred embodiment of the present invention, a clamping edge is provided on the outer wall of the upper part of the drill bit seat, and the clamping edge is clamped on an annular clamping groove in the upper surface of the anti-falling fish.

In a preferred embodiment of the present invention, a pair of first fan-shaped grooves and a pair of second fan-shaped grooves extending axially to the upper surface of the base are arranged symmetrically in a cross on the inner wall of the impact cylinder. The fan-shaped angle of the fan-shaped groove is larger than that of the second fan-shaped groove; the side wall ring of the lower part of the nozzle support seat is provided with a plurality of through holes passing through the side wall, and the bottom end of the second fan-shaped groove is provided with a connection with the side wall of the nozzle support seat. A connecting groove connected through the through holes; a diversion groove is respectively provided on the outer wall of the impact cylinder between the first fan-shaped groove and the second fan-shaped groove, and the four diversion grooves extend axially downwards close to the bottom of the impact body, and each diversion groove There are diversion holes through the wall of the impact cylinder; among the four diversion grooves, one pair of symmetrically distributed diversion grooves is the first diversion groove, and the other pair of symmetrically distributed diversion grooves is the second diversion groove The top of the impact cylinder is fixedly provided with an end cover, the end cover is provided with a central hole, and the cylindrical pendulum seal passes through the central hole, and the side wall of the end cover is provided with four corresponding Conductive flow groove; an annular space is formed between the upper side of the end cover and the lower side of the first annular boss.

In a preferred embodiment of the present invention, a pair of axially arranged first fan-shaped protrusions are arranged symmetrically on the outer cylinder wall of the cylindrical pendulum located in the lower cavity of the outer shell in the middle, and are adjacent to both sides of the first fan-shaped protrusions. A first flow distribution hole and a second flow distribution hole are respectively provided on the cylinder wall; a pair of axially arranged second fan-shaped protrusions are symmetrically provided on the inner cylinder wall of the cylindrical pendulum located in the lower cavity of the outer casing in the middle, and are adjacent to the first A third flow distribution hole and a fourth flow distribution hole are respectively provided on the cylinder walls on both sides of the two fan-shaped convex posts; Greater than the sector angle of the second sector-shaped protrusion; the first sector-shaped protrusion is swingably arranged in the first sector-shaped groove of the impact cylinder; the cylindrical pendulum corresponds to the axially upper side wall of each first sector-shaped protrusion, A first fan-shaped through hole, a second fan-shaped through hole and a third fan-shaped through hole are sequentially provided from bottom to top. The sector angles of the third sector-shaped through holes are the same and less than half of the sector angle of the first sector-shaped convex column, and the second sector-shaped through-holes and the third sector-shaped through-holes are arranged alternately in the circumferential direction; the first sector-shaped through-holes are arranged axially Located in the lower cavity of the middle outer shell, the outer side of the first fan-shaped through hole communicates with the annular space; the second fan-shaped through hole is located in the upper cavity of the middle outer shell in the axial direction, and the outer side of the second fan-shaped through hole communicates with the second annular space. The cavities are connected; the third fan-shaped through hole is located in the upper cavity of the middle outer shell in the axial direction, and the outside of the third fan-shaped through hole communicates with the first annular cavity.

In a preferred embodiment of the present invention, the outer cylinder wall of the cylindrical commutator located in the lower chamber of the middle outer shell is symmetrically provided with a pair of third fan-shaped protrusions arranged in the axial direction and a pair of shafts. The fourth fan-shaped protrusions arranged in the opposite direction are respectively provided with a first reversing hole and a second reversing hole on each third fan-shaped protrusion and adjacent to both sides of the third fan-shaped protrusion; on the outer wall of each fourth fan-shaped protrusion A third fan-shaped groove extending in the axial direction is respectively provided on the top; the second fan-shaped protrusion on the cylindrical pendulum is swingably arranged in the third fan-shaped groove of the cylindrical commutator; the cylindrical commutator corresponds to each A fourth fan-shaped through hole, a fifth fan-shaped through hole and a sixth fan-shaped through hole are sequentially provided on the side wall above the axial direction of the third fan-shaped protrusion; the fourth fan-shaped through-hole, the fifth fan-shaped through-hole The hole and the sixth fan-shaped through-hole are located on the same straight line as the third fan-shaped through-hole on the same side; the fan-shaped angle of the fifth fan-shaped through-hole and the sixth fan-shaped through-hole is the same as that of the second fan-shaped through-hole, and the fan-shaped angle of the first fan-shaped through-hole The angle is greater than the fan angle of the fourth fan-shaped through-hole; in the axial position, the fourth fan-shaped through-hole, the fifth fan-shaped through-hole and the sixth fan-shaped through-hole are respectively connected with the first fan-shaped through-hole, the second fan-shaped through-hole and the third fan-shaped through-hole. The heights of the fan-shaped through-holes correspond to each other; a fan-shaped flange protrudes from the side wall of the cylindrical commutator and surrounds the fourth fan-shaped through-hole, the fifth fan-shaped through-hole and the sixth fan-shaped through-hole respectively.

In a preferred embodiment of the present invention, a nozzle is fixed inside the nozzle support seat.

In a preferred embodiment of the present invention, the middle outer casing is threadedly connected to the upper short joint; the small end of the stepped connecting pipe is threaded to the lower end of the upper outer casing; the inner wall of the guide seat and the stepped connecting pipe is Threaded connection; the bottom of the middle shell and the suspension puppet are threaded.

As mentioned above, the axial impact of the composite impact drilling tool of the present invention is formed by the high-speed impact of the axial cylindrical hammer with relatively large mass, which is a kind of mechanical impact, which can effectively transmit the impact load to the drill bit, The impact load is sufficient to directly break the rock; and the two impacts (circumferential impact and axial impact) of the drilling tool are controlled by a reversing mechanism (cylindrical commutator). The frequency of the two impact loads is equal, and the rock breaking efficiency higher.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in:

Fig. 1: is the schematic sectional view of the structure of the composite percussion drilling tool of the present invention;

Fig. 2: is the structural representation of middle part outer casing in the present invention;

Fig. 3: is the schematic structural view of the upper and lower casing in the present invention;

Fig. 4: is the schematic structural view of the stepped connecting pipe in the present invention;

Fig. 5: is the structural representation of the middle and upper short joints of the present invention;

Fig. 6: is the structural schematic diagram of guide seat in the present invention;

Fig. 7A: is the structural representation one of cylindrical pendulum in the present invention;

Fig. 7B: is the structural representation two of cylindrical pendulum in the present invention;

Fig. 7C: is the structural representation three of cylindrical pendulum in the present invention;

Fig. 8A: is the structural representation one of tubular commutator in the present invention;

Fig. 8B: is the structural representation two of cylindrical commutator in the present invention;

Fig. 8C: is the structural representation three of cylindrical commutator in the present invention;

Fig. 9A: is the first structural representation of the impact cylinder in the present invention;

Fig. 9B: is the second structural representation of the impact cylinder in the present invention;

Fig. 9C: is the structural schematic diagram three of the impact cylinder in the present invention;

Fig. 9D: is the structural schematic diagram four of the impact cylinder in the present invention;

Fig. 10: is the structural representation of cylindrical impact hammer in the present invention;

Fig. 11: is the structural representation of end cap among the present invention;

Fig. 12A: is the structural schematic diagram one of the nozzle support seat in the present invention;

Fig. 12B: is the structural schematic diagram 2 of the nozzle support seat in the present invention;

Fig. 13: is the structural representation of nozzle among the present invention;

Fig. 14A: is the structural representation one of anti-falling fish in the present invention;

Fig. 14B: is the structure schematic diagram two of anti-falling fish in the present invention;

Fig. 15: is the structural representation of suspension pup joint in the present invention;

Fig. 16A: is the structural representation one of drill seat among the present invention;

Fig. 16B: is the structural representation two of drill seat in the present invention;

Fig. 17: is the schematic diagram showing three cutting positions (I, II and III) in the composite percussion drilling tool of the present invention;

Fig. 18A: It is a structural schematic diagram of position I when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the first state;

Fig. 18B: It is a schematic diagram of the structure at position II when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the first state;

Fig. 18C: It is a structural schematic diagram of the position III when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the first state;

Fig. 19A: It is a structural schematic diagram of position I when the cylindrical commutator and the cylindrical pendulum in the compound percussion drilling tool of the present invention are in the second state;

Fig. 19B: It is a schematic diagram of the structure at the position II when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the second state;

Fig. 19C: It is a structural schematic diagram of the position III when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the second state;

Fig. 20A: It is a structural schematic diagram of position I when the cylindrical commutator and the cylindrical pendulum are in the third state in the composite percussion drilling tool of the present invention;

Fig. 20B: It is a schematic diagram of the structure at position II when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the third state;

Fig. 20C: It is a structural schematic diagram of the position III when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the third state;

Fig. 21A: It is a schematic diagram of the structure at position I when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the fourth state;

Fig. 21B: It is a schematic diagram of the structure at position II when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the fourth state;

Fig. 21C: It is a schematic diagram of the structure at position III when the cylindrical commutator and the cylindrical pendulum in the composite percussion drilling tool of the present invention are in the fourth state;

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

As shown in Figures 1 to 5, the present invention proposes a composite percussion drilling tool 100. The composite percussion drilling tool 100 includes a middle casing 1 that penetrates up and down. An annular boss 13, the first annular boss 13 divides the inner chamber of the middle outer casing 1 into an upper chamber 11 and a lower chamber 12 (as shown in Figures 1 and 2); the inner wall of the upper end of the middle outer casing 1 is fixedly connected with an upper The short joint 21, the small end of a stepped connecting pipe 22 passes upward through the center hole of the upper short joint 21, and is fixedly connected with the inner wall of the lower end of the upper outer casing 23 which penetrates up and down; the upper part of the upper short joint 21 and the lower part of the upper outer casing 23 There is a spline positioning connection between them; a drill seat 3 is hung on the bottom of the middle outer shell 1;

As shown in Figures 1 and 6, the inner wall of the stepped connecting pipe 22 is fixedly connected with a flow guide seat 24 that penetrates up and down. Block the first flange 241 on the inner wall of the flow guide seat 24; the outer wall of the flow guide seat 24 is provided with a cylindrical pendulum 5, and the top of the cylindrical pendulum 5 stops against the second flange 242 on the outer wall of the flow guide seat 24; The shape commutator 4 and the cylindrical pendulum 5 all pass down the first annular boss 13 of the middle outer shell 1 and extend to the lower chamber 12 of the middle outer shell, the first annular boss 13 and the cylindrical pendulum 5 Outer wall seal sliding contact;

As shown in Figures 1 and 10, on the outside of the cylindrical pendulum 5 and located in the upper chamber 11 of the middle outer shell, a cylindrical hammer 6 is sleeved to slide up and down, and the inner wall of the cylindrical hammer 6 protrudes inward. The second annular boss 63 is arranged on the outer wall of the cylindrical pendulum 5 for sealing and sliding. A first annular cavity 61 and a second annular cavity 62 are formed at and below;

As shown in Figure 1, an impact cylinder 7 is provided in the lower cavity 12 of the middle outer casing; the base 71 of the impact cylinder 7 is provided with a through hole 711 that penetrates up and down; the upper section of the through hole 711 is clamped with a hollow nozzle support seat 8 (As shown in Fig. 12A, Fig. 12B), the lower segment of through hole 711 is the polygonal hole (such as: regular hexagonal hole) that is connected with drill bit seat 3; Impact cylinder 7 is socketed in by the lower segment polygonal hole of base 71 through hole 711 On the drill seat 3 (the polygonal hole constitutes the circumferential positioning of the impact cylinder 7 and the drill seat 3); the cylindrical commutator 4 and the cylindrical pendulum 5 all extend into the interior of the impact cylinder 7, and the bottom end of the cylindrical commutator 4 Abut against the card edge 81 of the outer wall of the nozzle support seat 8; the bottom end of the cylindrical pendulum 5 abuts against the upper surface 712 of the impact cylinder base; A sinking groove 713 communicating with the upper section of the through hole 711 is provided;

In this embodiment, as shown in Fig. 1, Fig. 14A, Fig. 14B, Fig. 15, Fig. 16A, and Fig. 16B, a suspension nipple 32 is fixedly provided at the bottom of the middle outer casing 1, and the outer wall of the suspension nipple 32 and the middle part The inner wall of the bottom of the outer casing 1 is threaded; the upper part of the drill bit seat 3 passes through the central hole of the suspension joint 32 upwards and is connected with an anti-falling fish 33, and the anti-falling fish 33 can be hung on the top of the suspension joint 32 The drill seat 3 is installed in the outer wall of the center hole of the suspension nipple 32 and the inner wall of the center hole of the suspension nipple. The inner wall of the joint center hole is provided with a corresponding keyway; or vice versa); in order to facilitate the assembly and disassembly of the drill seat 3, the anti-falling fish 33 is a complete ring structure formed by the docking of two symmetrical semi-circular rings; the drill seat 3 The upper outer wall is provided with a card edge 31, and the card edge 31 is set on the annular card groove in the upper surface of the anti-falling fish 33;

Further, in this embodiment, as shown in FIGS. 9A to 9D , on the inner wall of the impact cylinder 7 , there are a pair of first sectors extending axially to the upper surface 712 of the base in a symmetrical manner in the circumferential direction. Slot 72 and a pair of second fan-shaped grooves 73, the fan-shaped angle of the first fan-shaped groove 72 is greater than the fan-shaped angle of the second fan-shaped groove 73; the side wall ring of the lower part of the nozzle support seat 8 is provided with a plurality of through holes through its side wall 82, the bottom end of the second fan-shaped groove 73 is provided with a communication groove 731 communicating with a plurality of through holes 82 on the side wall of the nozzle support seat, and the communication groove 731 is provided obliquely downward from the upper surface 712 of the base and extends to the through hole The inner wall of the upper section of 711; the plurality of through holes 82 are also communicated with the sinking groove 713; the outer wall of the impact cylinder 7 between the first fan-shaped groove 72 and the second fan-shaped groove 73 is respectively provided with a diversion groove, four diversion grooves The groove extends axially downwards close to the bottom of the impact body, and each diversion groove is provided with a diversion hole through the wall of the impact cylinder; one pair of diversion grooves symmetrically distributed among the four diversion grooves is the first diversion groove 74 , another pair of symmetrically distributed diversion grooves is the second diversion groove 75, the diversion hole in the first diversion groove 74 is the first diversion hole 741, and the diversion hole in the second diversion groove 75 is the first diversion hole Two diversion holes 751; the top of the impact cylinder 7 is fixedly provided with an end cover 76 (which can be axially fixedly connected to the top of the impact cylinder 7 by screws), as shown in Figure 11, the end cover 76 is provided with a central hole 761, The cylindrical pendulum 5 seals through the central hole 761, and the side wall of the end cover 76 is provided with four passage grooves 762 corresponding to the first flow guide groove 74 and the second flow guide groove 75; An annular space K is formed between the upper side of the end cover 76 and the lower side of the first annular boss 13;

In this embodiment, as shown in Fig. 7A to Fig. 7C, the outer cylinder wall of the cylindrical pendulum 5 located in the lower cavity 12 of the outer casing in the middle part is symmetrically provided with a pair of first shafts extending axially to the bottom of the cylindrical pendulum. The fan-shaped protrusion 51 is provided with a first flow distribution hole 511 and a second flow distribution hole 512 on the cylinder wall adjacent to the first fan-shaped protrusion 51; the cylindrical pendulum 5 is located in the lower cavity 12 of the middle outer shell The cylinder wall is also symmetrically provided with a pair of second fan-shaped protrusions 52 extending axially and close to the bottom of the cylindrical pendulum, and the cylinder wall adjacent to the two sides of the second fan-shaped protrusions 52 is respectively provided with a third flow distribution hole 521 and a fourth flow distribution hole. Hole 522; the first sector-shaped protrusion 51 and the second sector-shaped protrusion 52 are arranged in a cross in the circumferential direction of the cylindrical pendulum, and the sector angle of the first sector-shaped protrusion 51 is greater than that of the second sector-shaped protrusion 52 Angle; the first fan-shaped boss 51 is swingably arranged in the first fan-shaped groove 72 of the impact cylinder 7; the cylindrical pendulum 5 corresponds to the axially upper side wall of each first fan-shaped boss 51, from bottom to top A first fan-shaped through-hole 53, a second fan-shaped through-hole 54 and a third fan-shaped through-hole 55 are provided in sequence, the fan-shaped angle of the first fan-shaped through-hole 53 is the same as the fan-shaped angle of the first fan-shaped protrusion 51, the second The fan angles of the second fan-shaped through hole 54 and the third fan-shaped through hole 55 are the same and less than half of the fan angle of the first fan-shaped protrusion 51. The direction is staggered; the first fan-shaped through-hole 53 is located in the lower chamber 12 of the middle outer casing in the axial direction of the cylindrical pendulum, and the outside of the first fan-shaped through-hole 53 is always connected with the annular space K; the second fan-shaped through-hole The through hole 54 is located in the upper cavity 11 of the middle outer shell in the axial direction of the cylindrical pendulum, and the outside of the second fan-shaped through hole 54 is always connected with the second annular cavity 62; the third fan-shaped through hole 55 is located in the axial direction of the cylindrical pendulum. The top is also located in the upper chamber 11 of the middle outer casing, and the outside of the third fan-shaped through hole 55 is always in communication with the first annular chamber 61;

In this embodiment, as shown in FIGS. 8A to 8C , the outer cylinder wall of the cylindrical commutator 4 located in the lower cavity 12 of the outer casing in the middle part is symmetrically provided with a pair of axially arranged third sectors in a cross shape. Protruding post 41 and a pair of axially arranged fourth sector-shaped protruding posts 42, on each third sector-shaped protruding post 41 and adjacent to both sides of the third sector-shaped protruding post 41, there are respectively provided first and second holes penetrating through the side wall of the cylindrical commutator. The reversing hole 411 and the second reversing hole 412; the outer wall of each fourth fan-shaped protrusion 42 is respectively provided with a third fan-shaped groove 421 extending axially; the second fan-shaped protrusion on the cylindrical pendulum 5 The column 52 is swingably arranged in the third fan-shaped groove 421 of the cylindrical commutator; on the axially upper side wall of the cylindrical commutator 4 corresponding to each third fan-shaped convex post 41, a fourth column is arranged sequentially from bottom to top. Fan-shaped through hole 43, a 5th fan-shaped through hole 44 and a 6th fan-shaped through hole 45; 41 is located on the same straight line (parallel to the axis); the sector angles of the fifth fan-shaped through hole 44, the sixth fan-shaped through hole 45 and the second fan-shaped through hole 54 are basically the same, and the sector angle of the first fan-shaped through hole 53 is larger than that of the fourth sector The fan angle of through hole 43; On the axial position, the 4th fan-shaped through hole 43, the 5th fan-shaped through hole 44 and the 6th fan-shaped through hole 45 are respectively with the first fan-shaped through hole 53, the second fan-shaped through hole 54 and the 6th fan-shaped through hole The heights of the three fan-shaped through holes 55 are corresponding; on the side wall of the cylindrical commutator 4 and around the fourth fan-shaped through hole 43, the fifth fan-shaped through hole 44 and the sixth fan-shaped through hole 45, a fan-shaped flange is respectively protruded 46 (it can also be understood that fan-shaped flanges are protruded from the positions of the fourth fan-shaped through hole, the fifth fan-shaped through hole and the sixth fan-shaped through hole, and the above-mentioned fourth fan-shaped through hole, fifth fan-shaped through hole and sixth fan-shaped through hole fan-shaped through hole through the corresponding fan-shaped flange), the wall thickness of the fan-shaped flange is the same as the thickness of the third fan-shaped protrusion 41 and the fourth fan-shaped protrusion 42, thus, when the fifth fan-shaped through-hole 44 and the second When the fan-shaped through holes 54 are opposite to each other, or when the sixth fan-shaped through holes 45 and the third fan-shaped through holes 55 are opposite to each other, a corresponding communication channel can be formed between the two fan-shaped through holes that are aligned with each other; in this embodiment Since the sector angle of the first fan-shaped through hole 53 is greater than the sector angle of the fourth fan-shaped through hole 43, the cylindrical commutator 4 and the cylindrical pendulum 5 can be connected to the first fan-shaped through hole 53 during the relative swing process. The four fan-shaped through-holes 43 are always in a state of sealed communication.

In this embodiment, the nozzle support seat is a tubular structure that penetrates up and down, and a nozzle 9 is fixed on the upper part of the nozzle support seat (as shown in Figure 13);

In this embodiment, the middle outer shell 1 is threadedly connected to the upper short joint 21; the small end of the stepped connecting pipe 22 is threaded to the lower end of the upper outer shell 23; the flow guide seat 24 is connected to the inner wall of the stepped connecting pipe 22 For threaded connection.

When the compound percussion drilling tool 100 of the present invention is working, the upper end of the upper casing 23 is connected to the drill collar, and the lower end of the drill seat 3 is connected to the drill bit; the drilling fluid enters the interior of the composite percussion drilling tool 100 from the upper opening of the upper casing 23, and then passes through the The stepped connecting pipe 22, deflector seat 24, cylindrical commutator 4 inner cavity, nozzle 9, nozzle support seat 8 and the through hole 711 of the impact cylinder, the center hole of the drill bit seat 3 flow into the drill bit, and the nozzle of the drill bit outflow;

Further, the composite percussion drilling tool 100 of the present invention consists of the fourth fan-shaped through hole 43 of the cylindrical commutator, the first fan-shaped through hole 53 of the cylindrical pendulum 5, the annular space K, the flow groove 762 of the end cover, the impact The corresponding diversion grooves and diversion holes of the cylinder 7 constitute the first channel for driving the cylindrical commutator 4 and the cylindrical pendulum to swing the first high-pressure liquid into the flow channel; the corresponding diversion holes on the cylindrical commutator 4 1. The corresponding distribution holes on the cylindrical pendulum form the second path of high-pressure liquid that drives the cylindrical commutator 4 and the cylindrical pendulum to swing; the first path of high-pressure liquid enters the flow path and the second path of high-pressure liquid The repeated and alternate conduction of the liquid entering the flow channel makes the cylindrical commutator 4 and the cylindrical pendulum 5 reciprocatingly swing clockwise and counterclockwise, and the circumferential vibration generated by the cylindrical pendulum in the cyclic swing is The cylinder 7 is transmitted to the drill seat 3, and then to the drill bit, so as to perform circumferential impact on the drill bit;

Simultaneously, the high-pressure drilling fluid also enters the first annular chamber 61 through the third path of high-pressure liquid when the sixth fan-shaped through-hole 45 communicates with the third fan-shaped through-hole 55, or enters the first annular chamber 61 through the fifth fan-shaped through-hole 44 and the third fan-shaped through-hole 55. The second fan-shaped through hole 54 corresponds to the fourth channel of high-pressure liquid entering the second annular chamber 62 when it is connected, thereby driving the cylindrical hammer 6 to reciprocate up and down, and the axial vibration generated by the cylindrical hammer 6 passes through the middle shell body (the first annular boss 13 on the middle outer shell) is transmitted to the drill seat 3, and then transmitted to the drill bit, so as to implement axial impact on the drill bit;

In the composite impact drilling tool of the present invention, the axial impact is formed by the high-speed impact of a large axial cylindrical hammer. It is a mechanical impact that can effectively transmit the impact load to the drill bit, and the impact load is sufficient to directly break the drill bit. rock; and the two types of impact (circumferential impact and axial impact) of the drilling tool are controlled by a reversing mechanism (the same cylindrical commutator 4), the frequency of the two impact loads is equal, and the rock breaking efficiency is higher .

The following describes the use process of the composite percussion drilling tool 100 of the present invention in conjunction with Figure 17, Figure 18A-18C, Figure 19A-19C, Figure 20A-20C and Figure 21A-21C:

Wherein, Fig. 17 is a schematic diagram showing three cutting positions (I, II and III) in the composite percussion drilling tool of the present invention; 7 and the positional relationship in the circumferential direction between the middle outer casing 1; II cut position can represent the fifth fan-shaped through-hole 44 of the cylindrical commutator and the second fan-shaped through-hole 54 of the cylindrical pendulum in the circumferential direction The positional relationship in the direction; the section III position can represent the positional relationship in the circumferential direction between the sixth fan-shaped through hole 45 of the cylindrical commutator and the third fan-shaped through hole 55 of the cylindrical pendulum;

Since the sector angle of the first fan-shaped through hole 53 is larger than that of the fourth fan-shaped through hole 43, the first fan-shaped through hole 53 and the fourth The fan-shaped through-hole 43 is always in a state of sealed communication; and because the outside of the first fan-shaped through-hole 53 is always in communication with the annular space K, therefore, the cylindrical commutator 4 and the cylindrical pendulum 5 are in relative swing, the fourth The fan-shaped through hole 43 can always maintain a communication state with the annular space K through the first fan-shaped through hole 53 .

During the operation of the composite percussion drilling tool 100 of the present invention, the cylindrical commutator 4 and the cylindrical pendulum 5 have four states;

The first state is the state in which both the cylindrical commutator 4 and the cylindrical pendulum 5 swing counterclockwise to the limit position in the impact cylinder 7; as shown in Figure 18A, in the first state, the cylindrical commutator The first reversing hole 411 in 4 is blocked by the inner wall of the cylindrical pendulum 5 and does not conduct; the second reversing hole 412 in the cylindrical commutator 4 is corresponding to the second distribution hole 512 of the cylindrical pendulum 5 The first fan-shaped groove 72 of the impact cylinder 7 passes through the first distribution hole 511 of the cylindrical pendulum 5, the sinking groove 713 on the base of the impact cylinder, the through hole 82 on the nozzle support seat, the through hole 711 communicates with the central hole of the drill seat 3 to form a corresponding low-pressure liquid return channel; at the same time, in the first state, as shown in Figure 18B, the second fan-shaped through hole 54 of the cylindrical pendulum 5 is connected to the cylindrical exchange The fifth fan-shaped through hole 44 of the directing device 4 is not conducting, and the second annular cavity 62 passes through the second fan-shaped through hole 54, the sinker groove 713, the through hole 82 on the nozzle support seat, the through hole 711 and the center hole of the drill seat 3 conduction to form a low-pressure liquid return channel; as shown in Figure 18C, the third fan-shaped through hole 55 of the cylindrical pendulum 5 is connected to the sixth fan-shaped through hole 45 of the cylindrical commutator 4, and then connected to the first annular cavity 61 conducts to form a high-pressure liquid inlet channel; therefore, in the first state, the high-pressure drilling fluid supplies high-pressure liquid to the first annular cavity 61 through the sixth fan-shaped through-hole 45 and the third fan-shaped through-hole 55 in sequence, and at the same time, The liquid in the second annular cavity 62 sequentially passes through the second fan-shaped through hole 54, the sinker 713, the through hole 82 on the nozzle support seat, the through hole 711 and the center hole of the drill seat 3 to realize liquid return, thereby driving the cylindrical The hammer 6 moves downward, and the axial downward vibration generated by the cylindrical hammer 6 is transmitted to the drill bit through the middle outer casing 1, thereby axially impacting the drill bit; while the cylindrical hammer 6 moves downward, the high-pressure liquid Sequentially through the second reversing hole 412 in the cylindrical commutator 4, the second distribution hole 512 of the cylindrical pendulum 5 acts on the side wall of the first fan-shaped convex post, driving the cylindrical pendulum 5 and simultaneously driving the cylinder The shape commutator 4 swings clockwise.

As shown in Figure 19A, when the cylindrical pendulum 5 swings clockwise to the limit position in the impact cylinder 7, and the cylindrical commutator 4 is still in the counterclockwise swing limit position relative to the cylindrical pendulum 5, it is the second state ;

In the second state, the circumferential positional relationship between the cylindrical commutator 4 and the cylindrical pendulum 5 does not change, but the circumferential positional relationship between the cylindrical pendulum 5 and the impact cylinder 7 changes. change; at this time, the first diversion hole 741 on the first diversion groove 74 is connected with the third distribution hole 521 on the cylindrical pendulum 5 to form a high-pressure liquid inlet channel; The flow distribution hole 522 is connected to the second fan-shaped groove 73 on the impact cylinder 7, and then passes through the communication groove 731 at the bottom of the second fan-shaped groove 73, the through hole 82 on the nozzle support seat, the through hole 711 and the center hole of the drill seat 3 conduction to form a low-pressure liquid return channel; thus, the cylindrical commutator 4 is driven to swing clockwise relative to the cylindrical pendulum 5 through the drilling fluid. At this time, since the positional relationship between the cylindrical commutator 4 and the cylindrical pendulum 5 does not change in the circumferential direction, the second fan-shaped through hole 54 of the cylindrical pendulum 5 and the fifth fan-shaped hole 54 of the cylindrical commutator 4 The through-hole 44 is still not conducting (as shown in Figure 19B), and the third fan-shaped through-hole 55 of the cylindrical pendulum 5 and the sixth fan-shaped through-hole 45 of the cylindrical commutator 4 are still in a conductive state (as shown in Figure 19C shown), therefore, the cylindrical hammer 6 is still in the lower position.

As shown in Figure 20A, when the cylindrical pendulum 5 swings clockwise to the extreme position in the impact cylinder 7, and the cylindrical commutator 4 also swings clockwise to the extreme position relative to the cylindrical pendulum 5, it is the third state ;

In the third state, the second reversing hole 412 in the cylindrical commutator 4 is blocked by the inner wall of the cylindrical pendulum 5 and is not connected; the first reversing hole 411 in the cylindrical commutator 4 is connected to the cylinder The first distribution hole 511 of the cylindrical pendulum 5 is correspondingly connected to form a high-pressure liquid inlet channel; the first fan-shaped groove 72 of the impact cylinder 7 passes through the second distribution hole 512 of the cylindrical pendulum 5 and the sinking groove 713 on the base of the impact cylinder. , the through hole 82 and the through hole 711 on the nozzle support seat are connected with the center hole of the drill bit seat 3 to form a low-pressure liquid return channel; at the same time, in the third state, as shown in Figure 20B, the cylindrical pendulum 5 The second fan-shaped through hole 54 conducts with the fifth fan-shaped through hole 44 of the cylindrical commutator 4, and then conducts with the second annular chamber 62 to form a high-pressure liquid inlet channel; as shown in Figure 20C, the cylindrical pendulum 5 The third fan-shaped through hole 55 and the sixth fan-shaped through hole 45 of the cylindrical commutator 4 are not connected, and the first annular chamber 61 passes through the third fan-shaped through hole 55, the sinker 713, and the through hole 82 on the nozzle support seat. , the through hole 711 is connected with the central hole of the drill bit seat 3 to form a low-pressure liquid return channel; therefore, in the third state, the high-pressure drilling fluid passes through the fifth fan-shaped through-hole 44 and the second fan-shaped through-hole 54 to the second fan-shaped through-hole in sequence. The high-pressure liquid is supplied in the annular chamber 62, and at the same time, the liquid in the first annular chamber 61 sequentially passes through the third fan-shaped through hole 55, the sinker groove 713, the through hole 82 on the nozzle support seat, the through hole 711 and the center hole of the drill seat 3 Realize backflow, thus, drive cylindrical punch 6 to move upwards, and impact force is transmitted to stepped connecting pipe 22, but because the spline connection between upper nipple 21 and upper outer casing 23 (as shown in Fig. 1, Fig. 3, 5), and there is an appropriate buffer gap between the stepped connecting pipe 22 and the upper short joint 21, so the impact force will not be transmitted upward to the drill; while the cylindrical hammer 6 moves upward, The high-pressure liquid sequentially passes through the first reversing hole 411 in the cylindrical commutator 4 and the first flow distribution hole 511 of the cylindrical pendulum 5 to act on the other side wall of the first fan-shaped boss, driving the cylindrical pendulum 5 and Simultaneously, the cylindrical commutator 4 is driven to swing counterclockwise.

As shown in Figure 21A, when the cylindrical pendulum 5 swings counterclockwise to the limit position in the impact cylinder 7, and the cylindrical commutator 4 is still in the clockwise swing limit position relative to the cylindrical pendulum 5, it is the fourth state ;

In the fourth state, the positional relationship between the cylindrical commutator 4 and the cylindrical pendulum 5 in the circumferential direction is still the same as that in the third state, while the circumferential position between the cylindrical pendulum 5 and the impact cylinder 7 is the same. The upward positional relationship is the same as in the first state; at this time, the second diversion hole 751 on the second diversion groove 75 is connected with the fourth distribution hole 522 on the cylindrical pendulum 5 to form a high-pressure liquid inlet channel ; and the third distribution hole 521 on the cylindrical pendulum 5 corresponds to the second fan-shaped groove 73 on the impact cylinder, and then passes through the communication groove 731 at the bottom of the second fan-shaped groove 73, the through hole 82 on the nozzle support seat, The through hole 711 communicates with the center hole of the drill bit seat 3 to form a low-pressure liquid return channel; thus, the cylindrical commutator 4 is driven to swing counterclockwise relative to the cylindrical pendulum 5 through the drilling fluid. At this time, since the positional relationship between the cylindrical commutator 4 and the cylindrical pendulum 5 does not change in the circumferential direction, the second fan-shaped through hole 54 of the cylindrical pendulum 5 and the fifth fan-shaped hole 54 of the cylindrical commutator 4 The through hole 44 is still conducting (as shown in Figure 21B), and the third fan-shaped through hole 55 of the cylindrical pendulum 5 and the sixth fan-shaped through hole 45 of the cylindrical commutator 4 are still in a non-conductive state (as shown in Figure 21C shown), therefore, the cylindrical hammer 6 is still in the upper position.

Further, when the cylindrical commutator 4 swings counterclockwise to the limit position relative to the cylindrical pendulum 5, the cylindrical commutator 4 and the cylindrical pendulum 5 return to the position of the first state (as shown in Figure 18A shown); in this way, the composite impact drilling tool 100 of the present invention has completed a cycle of motion, and during a cycle of motion, the cylindrical pendulum provides the drill bit with two circumferential impact loads, and the cylindrical impact hammer provides the drill bit In this way, driven by the high-pressure fluid, the cylindrical pendulum swings back and forth continuously to impact the drill bit in the circumferential direction, and the cylindrical hammer continuously moves up and down to impact the drill bit axially.

From the above, the composite percussion drilling tool of the present invention combines the characteristics of the axial percussion drilling tool and the torsional percussion drilling tool, and proposes a high-efficiency composite three-dimensional rock breaking method, that is, a drilling tool is terminated on the PDC bit, and simultaneously produces Axial and circumferential impact loads, the main body of this rock-breaking method is to cut rocks through the PDC bit, and in the drilling tool at the upper end of the PDC bit, the axial impact load generated by the cylindrical hammer acts on the rock, causing the rock to generate The cracks are even broken directly, which makes it easier for the PDC bit to cut into the rock, increasing the depth of a single cut, thereby improving the rock-breaking efficiency. Stick-slip phenomenon occurs when the depth is deep. In this way, three-dimensional rock breaking can be formed, which can greatly increase the ROP of drilling. This rock breaking method can solve the problem of low ROP in hard formations, thereby greatly reducing drilling costs.

The compound impact drilling tool of the invention can eliminate the "stick-slip" effect of the drill bit and can generate axial impact load. The drilling tool can improve the rock-breaking efficiency of the hard formation, reduce the drilling cost of the hard formation, improve the stability of the drilling tool and prolong the service life.

In the composite impact drilling tool of the present invention, the axial impact is formed by the high-speed impact of a large axial cylindrical hammer. It is a mechanical impact that can effectively transmit the impact load to the drill bit, and the impact load is sufficient to directly break the drill bit. rock; and the two types of impact (circumferential impact and axial impact) of the drilling tool are controlled by a reversing mechanism (cylindrical commutator), the frequency of the two impact loads is equal, and the rock breaking efficiency is higher; the tool The two impact loads are respectively implemented by the liquid to push the hammer and the pendulum, and the parts wear less during the implementation. There are no rubber and electronic components in this tool, and it has good temperature resistance. The technical parameters of the designed composite percussion drill (mainly including impact frequency and impact energy) can be adjusted by changing the diameter of the nozzle (the flow hole diameter of the nozzle 9), so that it can adapt to the drilling needs of different formations.

The above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention.

Claims (9)

1. A composite percussion drilling tool, characterized in that: the composite percussion drilling tool comprises a middle part casing that penetrates up and down, the inner wall of the middle part casing is provided with a first annular boss protruding inward, the first annular boss The inner cavity of the middle shell is divided into an upper cavity and a lower cavity; the upper end of the middle shell is fixedly connected with an upper short joint, and the small end of a stepped connecting pipe passes upward through the center hole of the upper joint, and connects with an upper joint that penetrates up and down. The lower end of the outer casing is fixedly connected; the bottom of the middle outer casing is hung with a drill seat; The inner wall of the stepped connecting pipe is fixedly connected with a diversion seat that penetrates up and down. The inner wall of the diversion seat is covered with a cylindrical commutator, and the top end of the cylindrical commutator is stopped by the first flange of the inner wall of the diversion seat; A cylindrical pendulum is set on the outer wall of the seat, and the top end of the cylindrical pendulum stops against the second flange on the outer wall of the flow guide seat; both the cylindrical commutator and the cylindrical pendulum pass downward through the first annular ring of the middle outer shell. The boss extends to the lower cavity of the middle outer shell, and the first annular boss is in sealing and sliding contact with the outer wall of the cylindrical pendulum; On the outside of the cylindrical pendulum and in the upper chamber of the middle outer shell, a cylindrical hammer is sleeved to slide up and down. The inner wall of the cylindrical hammer is provided with a second annular boss protruding inward, and the second annular boss seals and slides It is arranged on the outer wall of the cylindrical pendulum, and the outer wall of the cylindrical hammer is in sealing sliding contact with the inner wall of the middle outer shell, and the first annular cavity and the second annular cavity are respectively formed above and below the second annular boss; There is an impact cylinder in the lower chamber of the middle outer shell, and the base of the impact cylinder is provided with a through hole that penetrates up and down; the upper section of the through hole is clamped with a hollow nozzle support seat, and the lower section of the through hole forms a polygonal hole connected with the drill seat ; Both the cylindrical commutator and the cylindrical pendulum extend into the interior of the impact cylinder, and the bottom end of the cylindrical commutator is against the card edge of the outer wall of the nozzle support seat; the bottom end of the cylindrical pendulum is against the impact cylinder the upper surface of the base. 2. The composite percussion drilling tool according to claim 1, characterized in that: the bottom of the middle outer casing is fixed with a suspension nipple, and the upper part of the drill bit holder passes through the suspension nipple upwards and is connected with a fish-fall prevention, The anti-falling fish can be hung on the top of the suspension nipple. 3. The compound percussion drilling tool as claimed in claim 2, characterized in that: the outer wall of the drill base and the inner wall of the suspension nipple are connected by splines; the anti-falling fish is a ring structure formed by the butt joint of two symmetrical semi-circular rings . 4. The composite percussion drilling tool according to claim 3, characterized in that: the outer wall of the upper part of the drill bit seat is provided with a clamping edge, and the clamping edge is clamped on the annular clamping groove in the upper surface of the anti-falling fish. 5. The composite percussion drilling tool according to claim 1, characterized in that: a pair of first fan-shaped grooves and a pair of second fan-shaped grooves axially extending to the upper surface of the base are arranged symmetrically in a cross on the inner wall of the impact cylinder. The fan-shaped groove, the fan-shaped angle of the first fan-shaped groove is greater than the fan-shaped angle of the second fan-shaped groove; the side wall ring of the lower part of the nozzle support seat is provided with a plurality of through holes passing through its side wall, and the bottom end of the second fan-shaped groove is provided with A communication groove communicating with the through hole on the side wall of the nozzle support seat; a diversion groove is respectively provided on the outer wall of the impact cylinder between the first fan-shaped groove and the second fan-shaped groove, and the four diversion grooves extend axially downward to approach the impact At the bottom of the body, each diversion groove is provided with a diversion hole that penetrates the wall of the impact cylinder; among the four diversion grooves, a pair of symmetrically distributed diversion grooves is the first diversion groove, and the other pair of symmetrically distributed diversion grooves is the first diversion groove. The groove is the second diversion groove; the top of the impact cylinder is fixed with an end cover, the end cover is provided with a central hole, and the cylindrical pendulum is sealed through the center hole, and the side wall of the end cover is provided with four An overflow groove corresponding to the guide groove; an annular space is formed between the upper side of the end cover and the lower side of the first annular boss. 6. The composite percussion drilling tool according to claim 5, characterized in that: the outer cylinder wall located in the lower cavity of the outer casing in the middle part of the cylindrical pendulum is symmetrically provided with a pair of axially arranged first fan-shaped protrusions, adjacent to A first distribution hole and a second distribution hole are respectively provided on the cylinder wall on both sides of the first fan-shaped convex post; a pair of axially arranged first distribution holes are symmetrically provided on the inner cylinder wall located in the lower chamber of the outer casing in the middle of the cylindrical pendulum. Two fan-shaped protrusions, the third flow distribution hole and the fourth flow distribution hole are respectively provided on the cylinder wall adjacent to the two sides of the second fan-shaped protrusion; the first fan-shaped protrusion and the second fan-shaped protrusion are arranged in a cross, and the second fan-shaped protrusion The sector angle of one sector-shaped protrusion is greater than the sector angle of the second sector-shaped protrusion; the first sector-shaped protrusion is swingably arranged in the first sector-shaped groove of the impact cylinder; the cylindrical pendulum corresponds to the axis of each first sector-shaped protrusion On the upward side wall, a first fan-shaped through-hole, a second fan-shaped through-hole and a third fan-shaped through-hole are arranged sequentially from bottom to top, and the fan-shaped angle of the first fan-shaped through-hole is the same as that of the first fan-shaped protrusion , the sector angles of the second sector-shaped through-holes and the third sector-shaped through-holes are the same and less than half of the sector-angle of the first sector-shaped protrusions, and the second sector-shaped through-holes and the third sector-shaped through-holes are staggered in the circumferential direction; the first The fan-shaped through holes are located in the lower cavity of the middle outer shell in the axial direction, and the outside of the first fan-shaped through holes communicates with the annular space; the second fan-shaped through holes are located in the upper cavity of the middle outer shell in the axial direction, and the second fan-shaped through holes The outer side of the through hole communicates with the second annular cavity; the third fan-shaped through hole is located in the upper cavity of the middle shell in the axial direction, and the outer side of the third fan-shaped through hole communicates with the first annular cavity. 7. The composite percussion drilling tool according to claim 6, characterized in that: the outer cylinder wall of the cylindrical commutator located in the lower cavity of the outer casing in the middle is symmetrically provided with a pair of axially arranged third Sector-shaped bosses and a pair of fourth fan-shaped bosses arranged in the axial direction are respectively provided with a first reversing hole and a second reversing hole on each third fan-shaped boss and adjacent to both sides of the third fan-shaped boss; The outer wall of the fourth fan-shaped protrusion is respectively provided with a third fan-shaped groove extending axially; the second fan-shaped protrusion on the cylindrical pendulum is swingably arranged in the third fan-shaped groove of the cylindrical commutator; The cylindrical commutator is provided with a fourth fan-shaped through hole, a fifth fan-shaped through hole and a sixth fan-shaped through hole in sequence from bottom to top on the axially upper side wall of each third fan-shaped protrusion; the fourth fan-shaped through-hole The through hole, the fifth fan-shaped through hole and the sixth fan-shaped through hole are located on the same straight line as the third fan-shaped protrusion on the same side; the fifth fan-shaped through-hole, the sixth fan-shaped through-hole have the same fan angle as the second fan-shaped through-hole, The sector angle of the first fan-shaped through hole is greater than the sector angle of the fourth fan-shaped through hole; in the axial position, the fourth fan-shaped through hole, the fifth fan-shaped through hole and the sixth fan-shaped through hole are respectively connected with the first fan-shaped through hole and the sixth fan-shaped through hole. The heights of the second fan-shaped through hole and the third fan-shaped through hole are corresponding; on the side wall of the cylindrical commutator and around the fourth fan-shaped through hole, the fifth fan-shaped through hole and the sixth fan-shaped through hole are respectively provided with a fan-shaped protrusion edge. 8. The composite percussion drilling tool according to claim 1, wherein a nozzle is fixed in the nozzle support seat. 9. The composite percussion drilling tool as claimed in claim 2, characterized in that: the middle shell is threadedly connected to the upper short joint; the small end of the stepped connecting pipe is threaded to the lower end of the upper shell; The inner wall of the stepped connecting pipe is threaded; the bottom of the outer casing in the middle part is threaded with the suspension nipple.