Downhole pup joint for finishing well wall while drilling by double-stage high-frequency slapping

Abstract

The invention discloses an underground pup joint for finishing a well wall while drilling through two-stage high-frequency slapping. The underground pup joint comprises a main body structure, a two-stage power mechanism and a push rod slapping mechanism. The main body structure is provided with an upper connector and a lower connector and used for being connected with underground drilling tools such as a drill column and a drill collar, two stages of staggered stepped through holes are formed in the outer wall in the circumferential direction, three holes are evenly distributed in each stage in the circumferential direction, the shell is sleeved with the protective sleeve, and the two ends of the protective sleeve are fixed into the protective sleeve installation groove. The push rod slapping mechanism is assembled in a stepped through hole in the outer wall of the main body structure to form a two-stage radial slapping-resetting structure; the two-stage power mechanism adopts the design of an impact block and a biconical piston and is installed in the main body structure to provide power for the radial slapping-resetting structure. According to the device, vibration impact during well drilling is utilized, the impact block is driven to impact upwards, the two-stage power mechanism moves upwards, the push rod slapping mechanism is pushed to slap the well wall at high frequency, the effect of trimming the well wall is achieved, and the risk of well drilling accidents such as well wall collapse in the lifting, lowering and drilling processes is reduced.

Description

Technical Field

[0001] The invention relates to the technical field related to oil drilling technology, in particular to an underground short-circuit for trimming a well wall by double-stage high-frequency tapping while drilling. Background Art

[0002] Keeping the wellbore trimmed is a crucial link in the drilling project. It is directly related to the safety and efficiency of the drilling operation and the smooth progress of subsequent oil and gas production. During the drilling process, due to the influence of various factors such as the formation rock characteristics, geological conditions, and drilling fluid properties, the wellbore may become unstable, such as wellbore collapse and well leakage, which brings great challenges to the drilling operation. Therefore, in-depth research on the wellbore trimming and mastering its influencing factors and laws are of great significance to improving the safety and efficiency of drilling operations. At present, the main causes of well collapse are: imbalance of liquid column pressure, water-sensitive reaction of the formation, fragility of the formation itself, pumping caused by lifting the drill bit, failure to timely re-inject drilling fluid during the drilling process, resulting in a decrease in the liquid column pressure in the well, and long-term large-volume circulation of drilling fluid in the open hole section may flush the wellbore.

[0003] Patent number CN201620447721.1 is a variable diameter joint, the main structure is: joint body, wear-resistant belt, support block, wear-resistant block I, wear-resistant block II. It can extend or retract through the support block set on the through hole, change the outer diameter of the joint and then trim the well wall. However, the wear-resistant block of the device is difficult to repair after wear and damage, and the cost of use is high. In addition, the grinding force of the wear-resistant block cannot be guaranteed when the support block is extended, which may lead to a decrease in the effect of trimming the well wall. The grinding method used in this patent cannot play a role in reinforcing the well wall and cannot reduce the risk of well wall instability. Patent number CN202211387882.2 is a variable diameter drill stabilizer, the main structure is: upper and lower joints, center tube, straightening bar, upper and lower pistons, upper and lower outer sleeves, dovetail groove guide rails, upper and lower ball seat holes, upper and lower liquid inlet holes, cutting strips, support strips, sweep angles, back angles, back angles, opening grooves, cutting edges, cones. It expands the hole by changing the position of the straightening bar, and the straightening bar extends or retracts. However, the design of the stabilizer includes multiple precision components and complex mechanical structures (such as dovetail guide rails, upper and lower ball seat holes, etc.). The manufacture and processing of these components require high-precision equipment and technology, resulting in high manufacturing costs and the need for additional telescopic power. Similarly, the patent adopts a cutting method that cannot play a role in reinforcing the well wall and cannot reduce the risk of well wall instability. Patent number CN202222689364.8 is a retractable drilling reaming tool, the main structure of which is: transmission shaft, upper joint, disc spring group, housing, cutting teeth, guide shaft, pin, wedge-shaped guide surface, piston, reaming blade, blade groove, end cap, lower joint. It moves downward through the guide shaft, and the wedge-shaped guide surface pushes the reaming blade outward along the radial surface to cut the well wall. However, the patent has a complex structure, which increases the difficulty of manufacturing and processing. And because of the cutting and grinding method, cutting parts such as reaming blades are prone to wear during long-term use and need to be replaced regularly, which increases the cost of use and the difficulty of maintenance. Similarly, the above patent uses cutting or grinding methods which cannot reinforce the well wall and cannot reduce the risk of well wall instability.

[0004] Among the existing related patent technologies for wellbore trimming, most of the wellbore trimming tools use structures with cutting teeth or other cutting functions installed to cut and trim the wellbore. The drill pipe drives the device body to rotate, and the cutting teeth trim the wellbore. However, the cylindrical body and the cutting teeth are fixed in size, and the diameter of the borehole that can be trimmed by a wellbore trimming tool is also fixed, which cannot meet the wellbore trimming needs of boreholes of various diameters. In addition, the commonly used wellbore trimming devices are disposable items, which are difficult to repair after wear and damage, and have high use costs. Another part uses other methods such as rolling to trim the wellbore, which also has the disadvantage of not being able to meet the wellbore trimming needs of boreholes of various diameters, and the shaping amount at one time is relatively small. Therefore, it is necessary to frequently lift and lower the drill string and replace the tool during the shaping process, which increases the workload and time cost of the operation, and in the case of uneven force, the rolling parts are easily flattened, resulting in the scrapping of the device and a corresponding increase in the well repair cost.

[0005] Therefore, there is an urgent need to provide a device that can use other methods to reinforce and repair the well wall while the drill bit drills into the formation, so as to solve the problems raised in the above background technology. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide an underground short circuit for drilling while double-stage high-frequency tapping to trim the well wall, which can reinforce the well wall while drilling, reduce the risk of well wall instability and the accident rate, and improve the safety of drilling.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A downhole short circuit for two-stage high-frequency tapping and trimming of well wall while drilling is used to tap, reinforce and trim the well wall. The device includes a main structure, a two-stage power mechanism and a push rod tapping mechanism. The vibration impact during drilling is used to drive the impact block to impact upward, so that the two-stage conical piston is displaced, and the push rod tapping mechanism is driven to tap the well wall at a higher frequency to complete the trimming of the well wall.

[0009] In the preferred embodiment, the main structure includes an upper joint, a lower joint, a two-stage stepped hole, a retaining ring, a protective sleeve installation groove, and a protective sleeve. The upper and lower joints are used to connect downhole drilling tools such as drill strings and drill collars. The upper inner wall of the lower joint is provided with threads for installing the retaining ring of the axial limiting part of the two-stage power mechanism. Since the main structure will not have sufficient strength if the single-stage six stepped holes are designed, a two-stage stepped hole is provided in the circumferential direction of the outer wall of the main structure, and three holes are evenly distributed in each stage. The two stages have a total of six stepped through holes that are evenly staggered; the three holes of the first stage are at 0°, 120°, and 240°, respectively, and the three holes of the second stage are at 60°, 180°, and 300°, respectively; the inner wall of the hole with the middle diameter of each stepped hole is provided with threads for installing a spring base. The outer wall of the main structure is also provided with two protective sleeve installation grooves for fixing the protective sleeve. The protective sleeve is an integrated elastic sleeve that is mounted outside the main structure. It is provided with six holes at the same position as the double-stage stepped holes. It is used to isolate the internally wrapped parts from external fluids, rock cutting, etc., to prevent premature failure of the device due to corrosion and wear. It can also play a part in preventing the push rod striking mechanism from falling.

[0010] In the preferred embodiment, the two-stage power mechanism includes an upper packing section, an annular sealing ring groove, a two-stage conical piston, a lower packing section, an impact block, and a spring II. The upper and lower packing sections are both provided with an annular sealing ring groove for installing an annular sealing ring to prevent the fluid or the solid particles it carries from entering the space formed between the main structure and the two-stage power mechanism, causing the parts to get stuck or wear excessively; the inner surface of the upper packing section is a circular cone surface with a certain taper, and the hollow of the two-stage conical piston is a fluid flow channel. When the high-speed fluid reaches this surface and is about to enter the flow channel, the fluid pressure can be increased and the flow rate can be increased. The upper packing section is integrated with the two-stage conical piston, and the lower part of the two-stage conical piston is provided with a thread for installing the lower packing section, and the upper surface of the lower packing section contacts one end of the spring II; the impact block is annular and cylindrical, which is used to transmit vibration impact; the spring II is sleeved on the two-stage conical piston to play a reset role. The conical surface of the two-stage conical piston converts the axial motion of the two-stage power mechanism into the radial motion of the push rod slapping mechanism. When the radial impact stroke of the push rod impact mechanism is constant, if the taper of the conical surface is large, the two-stage conical piston only needs a shorter axial displacement, but the required impact force is also greater, and the maximum outer diameter of the two-stage conical piston is constant, and the internal flow channel diameter is reduced; if the taper of the conical surface is small, the two-stage conical piston needs a longer axial displacement, but the required impact force is also smaller, and the maximum outer diameter of the two-stage conical piston is constant, and the internal flow channel diameter is larger. Therefore, the taper of the conical surface should not be too large or too small. Since the conical surface of the two-stage conical piston contacts and rubs against the push rod impact mechanism, a material with good wear resistance should be used and smooth and anti-friction treatment should be performed. The retaining ring is provided with a thread, which cooperates with the thread of the upper inner wall of the lower joint to be fixed inside the main structure, playing the role of axial limit.

[0011] In the preferred embodiment, the push rod slapping mechanism includes an upper slapping plate, a lower slapping plate, a connecting screw, a push rod, a spring I, and a spring base. There are six push rod slapping mechanisms, which are installed in the double-stage stepped holes on the main structure. The six slapping plates cooperate with each other to completely cover the well wall in the circumferential direction; the upper slapping plate is provided with a stepped through hole, the lower slapping plate is integrated with the push rod and has a threaded hole on the upper part, and the upper threaded hole is used to install the connecting screw. The upper slapping plate has rounded corners on both sides to prevent the drill from getting stuck when the drill string is lifted, lowered or drilled, and to avoid damaging the reinforced well wall. The lower part of the contact surface is in contact with the conical surface of the piston, which is a concave cone arc surface. The thickness of the slapping plate should not be too thick. An overly thick slapping plate will increase the weight, which will aggravate the wear between the push rod slapping device and the spring base and affect the service life of the entire slapping device. Therefore, a thinner slapping plate should be selected as much as possible under the condition of ensuring the slapping effect and the stiffness of the slapping plate. Spring I is a variable diameter spring, with a larger diameter ratio at the upper and lower ends than in the middle. There is a boss at the junction of the lower slapping piece and the push rod, with a spring slot inside to fix one end of spring I; the outer bottom end of the spring base is threaded and installed on the double-stage stepped hole, and there is also a spring slot inside to fix the other end of spring I. A protective cover is sandwiched between the upper and lower slapping pieces, and the three are connected by connecting screws; the push rod slapping mechanism needs a large force to slap against the well wall, and the push rod slapping mechanism may be prone to deformation, so a material with lighter weight and higher strength and stiffness should be selected. Since the lower slapping piece of the push rod slapping mechanism is attached to the outer surface of the main structure, and the upper and lower slapping pieces have a certain thickness, the diameter of the overall device can still be designed to be smaller than the drill bit, so that the drill will not get stuck.

[0012] In the preferred embodiment, in the initial state, the two-stage power mechanism is located at the lower end, the lower surface of the lower sealing section is in close contact with the upper surface of the impact block, and the upper surface of the impact block is in close contact with the upper surface of the retaining ring. When the vibration impact is transmitted to the impact block, the impact block impacts upward, the two-stage power mechanism moves upward, and the conical surface contacts the push rod slapping mechanism; during slapping, as the two-stage power mechanism moves upward, the push rod slapping mechanism moves from contacting the small diameter of the cone top to contacting the large diameter of the cone bottom. At this time, spring I is in a stretched state, spring II is in a compressed state, and the six push rod slapping mechanisms are all in a slapped out state; during resetting, as spring II pushes the two-stage power mechanism downward, the tension of spring I resets the push rod slapping mechanism, and the push rod slapping mechanism From contacting with the large diameter of the cone bottom to contacting with the small diameter of the cone top, the six push rod slapping mechanisms are all in the reset state; one slapping cannot complete the slapping reinforcement and trimming of the entire well wall, but the device rotates with the drill, and the slapping and resetting process is repeated after rotation, so the circumferential well wall can be fully covered with slapping without dead angles, completing the circumferential slapping and trimming of the entire well wall; the device takes into account the influence of drilling fluid and annular space fluid, all components should be made of corrosion-resistant materials, there is mutual movement between parts, and they are more prone to wear, so metal materials with good wear resistance should be selected.

[0013] Compared with the existing methods and devices for reinforcing and trimming the well wall, the present invention uses a downhole short circuit for trimming the well wall by two-stage high-frequency tapping while drilling, and uses the vibration impact during drilling to push the impact block upward to cause the two-stage conical piston to displace, and push the push rod tapping mechanism to tap the well wall at a higher frequency to complete the trimming of the well wall. The use of this tapping method to trim the well wall can meet the needs of well wall trimming of boreholes of various diameters, and avoid device failure due to cutting and wear of the well wall. The overall structure of the device is simple, and the operability is strong. The diameter can be designed to be smaller than the drill bit, so the drill will not get stuck and the friction with the well wall is very small. The gap is large, providing a spacious flow channel for fluid circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For ease of explanation, the present invention is described in detail with reference to the following specific embodiments and accompanying drawings.

[0015] Figure 1 This is a downhole short-circuit structure diagram of a two-stage high-frequency tapping and trimming well wall while drilling in this application;

[0016] Figure 2 This is a comparative cross-sectional view of an underground short-circuit slapping and resetting method for drilling-while-drilling double-stage high-frequency slapping to trim the well wall;

[0017] Figure 3 This is a cross-sectional view of the main structure of a downhole short-circuit for drilling-while-drilling double-stage high-frequency tapping to trim the well wall;

[0018] Figure 4 This is a cross-sectional view of an underground short-circuited two-stage power mechanism for drilling-while-drilling two-stage high-frequency tapping and trimming of well walls according to the present application;

[0019] Figure 5 This is a structural diagram of a downhole short-circuited push rod slapping piece group for drilling-while-drilling double-stage high-frequency slapping to trim the well wall;

[0020] Figure 6 This is a cross-sectional view of an underground short-circuited push rod slapping mechanism for drilling-while-drilling two-stage high-frequency slapping to trim the well wall;

[0021] In the figure: 1-main structure; 2-two-stage power mechanism; 3-push rod slapping mechanism; 101-upper joint; 102-lower joint; 103-two-stage stepped hole; 104-retaining ring; 105-protection sleeve installation groove; 106-protection sleeve; 201-upper sealing section; 202-annular sealing ring groove; 203-two-stage conical piston; 204-lower sealing section; 205-impact block; 206-spring II; 301-upper slapping piece; 302-lower slapping piece; 303-connecting screw; 304-push rod; 305-spring I; 306-spring base; DETAILED DESCRIPTION

[0022] The embodiment of the present application provides an underground short circuit for trimming the well wall with a two-stage high-frequency tapping while drilling.

[0023] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0024] Figure 1 As shown, in this embodiment, a downhole short circuit for drilling a two-stage high-frequency tapping and trimming well wall is used to tap, reinforce and trim the well wall, which includes 1. a main structure; 2. a two-stage power mechanism; 3. a push rod tapping mechanism. There are six push rod tapping mechanisms 6, three in each of the upper and lower stages, each of which can cover nearly 1 / 6 of the well wall circumferentially. The two-stage power mechanism 2 is installed inside the main structure 1, and the hollow part is a fluid flow channel, and the fluid flows in from the upper joint 101. The protective sleeve 106 is an elastic sleeve, which is sleeved on the outside of the main structure 1. The downhole short circuit uses the vibration impact during drilling to drive the two-stage power mechanism 2 to produce displacement, and push the push rod tapping mechanism 3 to tap the well wall at a higher frequency to complete the trimming of the well wall.

[0025] Figure 2 As shown, in this embodiment, the fluid flows in from the upper joint 101, passes through the hollow flow channel of the two-stage power mechanism 2, and flows out from the lower joint 102. In the initial state, the two-stage power mechanism 2 is located at the lower end, the lower surface of the lower isolation section 204 is in close contact with the upper surface of the impact block 205, and the lower surface of the impact block 205 is in close contact with the upper surface of the retaining ring 104. When the vibration impact is transmitted to the impact block 205, the impact block 205 impacts upward, the two-stage power mechanism 2 moves upward, and the conical surface contacts the push rod slapping mechanism 2; during slapping, as the two-stage power mechanism 2 moves upward, the push rod slapping mechanism 3 moves from contacting the small diameter of the cone top to contacting the large diameter of the cone bottom. At this time, the spring I 305 is in a stretched state, the spring II 206 is in a compressed state, and the six push rod slapping mechanisms 3 are all in a slapped state; during resetting, as the spring II 2 06 pushes the two-stage power mechanism 2 to move downward, and the tension of spring Ⅰ305 resets the push rod slapping mechanism 3. The push rod slapping mechanism 3 moves from contacting with the large diameter of the cone bottom to contacting with the small diameter of the cone top. The six push rod slapping mechanisms 3 are all in the reset state; one slapping cannot complete the slapping reinforcement and trimming of the entire well wall, but the device rotates with drilling, and the slapping and resetting process is repeated after rotation, so the circumferential well wall can be fully covered with slapping without dead angles, completing the circumferential slapping and trimming of the entire well wall.

[0026] Figure 3As shown, in this embodiment, the main structure 1 is an integrated design, and the outer circumference of the shell is evenly distributed with double-stage stepped holes. The upper joint 101 and the lower joint 102 are used to connect downhole drilling tools such as drill strings and drill collars. The upper inner wall of the lower joint 102 is provided with threads for installing and fixing the retaining ring 7. The outer wall is provided with double-stage stepped holes 103 in the circumference, and each stage is evenly distributed with three holes in the circumference. The two stages have a total of six stepped through holes that are evenly staggered and evenly divided into 360° in the circumference; the inner wall of the second step of each stepped hole is provided with threads, and the retaining ring 104 is a circular metal plate with threads on the outside, which is used to axially limit the internal parts of the main structure 1; the protective sleeve 106 is an elastic sleeve of an integrated design, which is provided with six holes in the same position as the double-stage stepped holes 103, and the two sides are fixed on the protective sleeve installation groove 105 on the outer wall of the main structure 1.

[0027] Figure 4 As shown, the two-stage power mechanism 2 in this embodiment includes an upper sealing section 201, an annular sealing ring groove 202, a two-stage conical piston 203, a lower sealing section 204, an impact block 205, and a spring II 206. The upper sealing section 201 and the lower sealing section 204 are both provided with an annular sealing ring groove 202, which is used to prevent the fluid or the solid particles carried by it from entering the space formed between the main structure and the two-stage power mechanism, causing the parts to be stuck or excessively worn; one side of the upper sealing section 201 is a circular cone surface with a certain taper, which can make the fluid pressure higher and the flow rate faster. The upper sealing section 201 and the two-stage conical piston 203 are of an integrated design, while the lower sealing section 204 and the two-stage conical piston 203 are threadedly connected. The two-stage conical piston 203 is hollow as a fluid flow channel, and the upper conical surface of the two-stage conical piston 203 converts the axial motion of the two-stage power mechanism into the radial motion of the push rod slapping mechanism. When the radial slapping stroke of the push rod slapping mechanism is constant, the taper of the conical surface should not be too large or too small. The taper of the conical surface is initially set to 20°. The coaxiality of the two conical surfaces can ensure that the six slapping pieces in two stages slap and retract at the same time. The radius difference between the large radius of the cone bottom and the small radius of the cone top is the maximum slapping stroke of the push rod slapping mechanism 6. In this embodiment, the radius difference between the cone bottom and the cone top is 15mm. The impact block 205 is a cylindrical ring, and a metal material with a higher density is selected. The diameter of the spring II 206 is 140mm, the number of turns is 5 turns, the height is 53mm in the initial state, and the cross-sectional diameter is about 4mm.

[0028] Figure 5 , 6As shown, in this embodiment, there are six push rod striking mechanisms 3, and the six striking plates cooperate with each other to cover the well wall with a circumferential micro-gap. The upper striking plate 301 is a cylindrical thin plate, and the upper striking plate 301 and the lower striking plate 302 are connected and fixed by connecting screws 303, and the upper and lower plates are used to install the clamping protective cover 106. The actual striking part of the upper striking plate 301 is 70mm wide, and rounded corners are provided on both sides to prevent the drill from getting stuck when the drill string is lifted, lowered or drilled, so as to avoid damaging the reinforced well wall. The lower striking plate 302 has a boss at the bottom, and a spring slot is provided inside. The spring base 306 also has a spring slot inside. The two slots are used to fix the spring I 305, and the spring I 305 can play a role in resetting and preventing it from falling. The outer side of the lower part of the spring base 306 is threaded, which cooperates with the thread on the main structure shell to fix the spring base 306 on the double-stage stepped hole 103 of the main structure 1. The maximum diameter of the upper part without thread is 48mm. The outer thread of the lower part of the spring base 4 is M10×1.5, with a height of 15 mm and a right-hand thread.

[0029] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0030] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. In addition, the various different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A downhole short circuit for drilling a two-stage high-frequency slapping well wall for slapping and reinforcing the well wall, comprising a main structure (1), a two-stage power mechanism (2), and a push rod slapping mechanism (3); the main structure (1) comprises an upper joint (101), a lower joint (102), a two-stage stepped hole (103), a retaining ring (104), a protective sleeve installation groove (105), and a protective sleeve (106); the two-stage power mechanism (2) comprises an upper isolation section (201), an annular sealing ring groove (202), a two-stage conical piston (20 3), a lower isolation section (204), an impact block (205), and a spring II (206); the push rod striking mechanism (3) comprises an upper striking plate (301), a lower striking plate (302), a connecting screw (303), a push rod (304), a spring I (305), and a spring base (306); the device utilizes the vibration impact during drilling to push the impact block (205) upward, causing the double-stage conical piston (203) to move, pushing the push rod striking mechanism (3) to strike the well wall at a higher frequency, thereby completing the well wall repair.

2. The downhole short circuit for drilling-while-drilling double-stage high-frequency tapping and trimming well wall according to claim 1 is characterized in that: The upper joint (101) and the lower joint (102) in the main structure (1) are used to connect downhole drilling tools such as a drill string and a drill collar. The upper inner wall of the lower joint (102) is provided with a thread for installing a retaining ring (104). The step on the upper part of the thread contacts one end of a spring II (206). The outer wall of the main structure (1) is provided with a double-stage stepped hole (103) in the circumferential direction. Three holes are evenly distributed in each stage in the circumferential direction. A total of six stepped through holes in the two stages are evenly staggered and equally divided into 360 degrees in the circumferential direction. The inner wall of the second step of each stepped hole is provided with a thread for matching with a spring base (306). The outer wall of the main structure (1) is also provided with two protective sleeve installation grooves (105) for fixing the protective sleeve (106).

3. The downhole short circuit for drilling-while-drilling double-stage high-frequency tapping and trimming well wall according to claim 2 is characterized in that: The retaining ring (104) is a circular metal plate with threads on the outside, and is used to axially limit the internal parts of the main structure (1); the protective sleeve (106) is an elastic sleeve of integral design, and is provided with six holes at the same position as the double-stage stepped hole (103), and is fixed on both sides to the protective sleeve mounting groove (105) on the outer wall of the main structure (1), and is used to isolate the internally wrapped parts from external fluids, rock cutting, etc., to prevent the device from being stuck or failing prematurely due to corrosion and wear.

4. The downhole short circuit for drilling-while-drilling double-stage high-frequency tapping and trimming well wall according to claim 1 is characterized in that: An annular sealing ring groove (202) is provided on the upper sealing section (201) of the two-stage power mechanism (2) to prevent the fluid or the solid particles it carries from entering the space formed between the main structure (1) and the two-stage power mechanism (2) to prevent the components from getting stuck or wearing excessively. The bottom of the two-stage conical piston (203) is provided with threads and is an integrated design. Each stage is composed of a conical surface + a cylindrical surface. The conical surface is used to adjust the axial movement of the two-stage power mechanism (2). The lower end of the lower sealing section (204) is also provided with an annular sealing ring groove (202), and the inner wall of the upper end is provided with a thread, which is connected with the bottom thread of the double-stage conical piston (203), and the upper surface of the lower sealing section (204) is in contact with the other end of the spring II (206); the impact block (205) is annular and cylindrical, and is used to transmit vibration impact; the spring II (206) is sleeved on the double-stage conical piston (203) to play a reset role.

5. The downhole short circuit for drilling-while-drilling double-stage high-frequency tapping and trimming well wall according to claim 1 is characterized in that: The push rod striking mechanism (3) is composed of six pieces, which are installed in the double-stage stepped hole (103) on the main structure (1). The six pieces cooperate with each other to cover the well wall with a circumferential micro-gap; the upper striking piece (301) is provided with a stepped through hole, the lower striking piece (302) and the push rod (304) are integrated and have a threaded hole on the upper part, and the upper threaded hole is used to install the connecting screw (303); there is a boss at the junction of the lower striking piece (302) and the push rod (304), and a spring slot is provided inside for fixing One end of the fixed spring I (305); a protective sleeve (106) is sandwiched between the upper slapping plate (301) and the lower slapping plate (302), and the three are connected using a connecting screw (303); the bottom surface of the push rod (304) is a concave conical surface, which contacts and fits completely with the conical surface of the double-stage conical piston (203); the outer bottom end of the spring base (306) is provided with a thread, which is installed on the double-stage stepped hole (103), and a spring groove is provided inside to fix the other end of the spring I (305).

6. The downhole short circuit for drilling-while-drilling double-stage high-frequency tapping and trimming well wall according to claim 1 is characterized in that: When the vibration impact is transmitted to the impact block (205), the impact block (205) impacts upward, the two-stage power mechanism (2) moves upward, and the conical surface contacts the push rod slapping mechanism (6); during slapping, as the two-stage power mechanism (2) moves upward, the push rod slapping mechanism (6) moves from contacting the small diameter of the cone top to contacting the large diameter of the cone bottom. At this time, the spring I (305) is in a stretched state, the spring II (206) is in a compressed state, and the six push rod slapping mechanisms (3) are all in a slapped state; during reset, as the springs (2) move upward, the push rod slapping mechanism (6) moves from contacting the small diameter of the cone top to contacting the large diameter of the cone bottom. Spring II (206) pushes the two-stage power mechanism (2) to move downward, and the tension of spring I (305) resets the push rod slapping mechanism (3). The push rod slapping mechanism (3) moves from contacting the large diameter of the cone bottom to contacting the small diameter of the cone top. The six push rod slapping mechanisms (3) are all in the reset state. One slapping cannot complete the slapping reinforcement and trimming of the entire well wall, but the device rotates with drilling, and the slapping and resetting process is repeated after rotation, so the circumferential well wall can be fully covered with slapping without dead angles, completing the circumferential slapping and trimming of the entire well wall.

7. The downhole short circuit for drilling-while-drilling double-stage high-frequency tapping and trimming well wall according to claim 1 is characterized in that: The device takes into account the influence of drilling fluid and annular fluid. All components should be made of corrosion-resistant materials. There is mutual movement between the parts, which are more prone to wear. Metal materials with good wear resistance should be selected. At the same time, it requires a large force to hit the well wall. The push rod hitting mechanism (3) may be easily deformed. Therefore, materials with lighter weight and higher strength and stiffness should be selected. The hitting plate of the push rod hitting mechanism (3) is attached to the outer surface of the main structure (1) and has a certain thickness. However, the diameter of the overall device can still be designed to be smaller than the drill bit to prevent the drill from getting stuck.

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