Drilling machine with double-power-head synchronous pipe-following drilling device and method

Abstract

The invention provides a drilling machine with a double-power-head synchronous pipe-following drilling device and a method. The drilling machine comprises a supporting base, a feeding machine body is installed on the supporting base, a clamping device is fixedly installed on the longitudinal front side of the feeding machine body, a rear power head and a front power head are movably installed on the longitudinal rear side of the feeding machine body, a second sleeve is sleeved with the longitudinal front side of the front power head, and an upper rod support is installed on one transverse side of the feeding machine body; the method comprises the three steps of pipe-following drilling, directional drilling and drilling retreating. Due to the fact that the double independent operation power heads are adopted, the front power head is a power head with a rear chuck and a casing pipe for jacking, and the rear power head is an active drill rod type power head, various processes such as synchronous pipe-following drilling, conventional rotary drilling, directional drilling and rapid drilling retreating can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of mine drilling, relates to a drilling device and a drilling rig, and in particular to a drilling rig with a dual-power head synchronous pipe-following drilling device and a method. Background Art

[0002] In the field of mining, in order to obtain engineering geological conditions, hydrogeology and hidden disaster factors, and to reasonably and scientifically formulate production plans such as excavation and coal mining based on the detection results, geophysical exploration and drilling are currently mainly used. Drilling is the most direct technical means to obtain abnormal stratigraphic data, especially in obtaining drilling data through directional long-distance drilling, which can reasonably evaluate stratigraphic information such as stratigraphic structure and coal and rock layer distribution. At the same time, it provides the premise for directional exploration and construction management of gas-rich areas, water-rich abnormal areas, abnormal geological structural belts, etc., and provides drilling channels for subsequent gas extraction, drainage and pressure reduction, grouting reinforcement and other management methods.

[0003] When drilling in unstable strata such as soft coal seams, broken zones, and water-sensitive strata, the drilling process is difficult due to hole collapse, and it is easy to cause risks such as drill bit sticking and drill burial, which seriously affects the efficiency of drilling. This problem can be effectively avoided by using casing-following drilling to protect the hole while drilling. That is, during the drilling process, the drill pipe power head drives the drill pipe and drill tools to drill, and at the same time, the casing power head drives the casing to rotate at a lower speed or directly push the casing-following drilling method. Therefore, this drilling method requires a dual-power-head drilling rig.

[0004] At present, the main problems of dual-power head drilling rigs are as follows: ① The efficiency of following-the-pipe drilling is low, which is mainly manifested in the difficulty in threading the casing and the poor centering of the casing thread; ② The drilling process of the casing and the drill pipe is difficult to synchronize; ③ The matching process of following-the-pipe drilling and rotary drilling or directional drilling is complicated. Summary of the invention

[0005] In view of the defects and shortcomings of the prior art, the purpose of the present invention is to provide a drilling rig and method with a dual-power head synchronous pipe-following drilling device, so as to solve the technical problem in the prior art that the casing thread is difficult to thread on and the casing thread is poorly aligned, resulting in low pipe-following drilling efficiency.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0007] A drilling rig with a dual-power head synchronous pipe drilling device comprises a feed body, a support seat is rotatably installed at the bottom of the longitudinal front end of the feed body; a clamp is fixedly installed on the upper part of the longitudinal front side of the feed body, and a clamp is fixedly installed on the longitudinal front side of the feed body, and a first sleeve is clamped in the clamp; a rear power head is movably installed on the longitudinal rear side of the feed body, a front power head is arranged between the rear power head and the clamp, the front power head is movably installed on the feed body, and the front power head and the rear power head are arranged opposite to each other; a second sleeve is sleeved on the longitudinal front side of the front power head, and a longitudinal front end of a first drill rod is sleeved on the longitudinal rear side of the front power head, and the longitudinal rear end of the first drill rod is connected to the rear power head; an upper rod bracket is installed on the lateral side of the feed body, and a second drill rod is mounted on the upper rod bracket.

[0008] The rear power head includes a rear support plate, on the longitudinal front side of which a pair of rear feeders are installed, and the pair of rear feeders are arranged laterally opposite to each other; a rear motor mounting seat is fixedly installed on the longitudinal rear side of the rear support plate, and a rear motor box is installed on the rear motor mounting seat; a pair of rear rotary motors are installed in the top of the longitudinal rear side of the rear motor box, and an active drill rod is arranged on the longitudinal front side of the rear motor box, and the active drill rod is connected to the first drill rod.

[0009] The front power head includes a front support plate, on the longitudinal rear side of which a pair of front feeders are installed, and the pair of front feeders are arranged laterally opposite to each other; a front motor mounting seat is fixedly installed on the longitudinal front side of the front support plate, and a front motor box is installed on the front motor mounting seat; a chuck is installed on the longitudinal rear side of the front motor box; a pair of front rotary motors are installed in the top of the longitudinal front side of the front motor box, and a dust collecting device is installed in the bottom of the longitudinal front side of the front motor box; a casing head is arranged on the longitudinal front side of the dust collecting device; the first drill rod passes through the casing head, the dust collecting device, the front motor box, the chuck and the bottom of the rear motor box in sequence from front to back.

[0010] The present invention also protects a method for synchronous pipe drilling with dual power heads, which adopts the drilling rig with the synchronous pipe drilling device with dual power heads as described above.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] (I) The present invention adopts dual independent power heads, wherein the front power head is a power head with a rear chuck and casing jacking, and the rear power head is an active drill rod type power head. The present invention can realize multiple processes such as synchronous pipe drilling, conventional rotary drilling, directional drilling and rapid drilling withdrawal.

[0013] (II) The drilling rig with a dual-power head synchronous pipe-following drilling device of the present invention adopts a dual-power head to clamp the drill pipe, which can adapt to the rapid make-up and break-out function of the long drill pipe and meet the straightening requirements of the long drill pipe, thereby improving the make-up efficiency of the casing thread and the centering efficiency of the casing and the thread, thereby improving the pipe-following drilling efficiency, solving the problems existing in the pipe-following drilling, and providing technical and equipment guarantees for the promotion and application of the pipe-following drilling technology.

[0014] (III) The drilling rig with a dual-power head synchronous casing drilling device of the present invention is used for follow-up drilling construction, which reduces the labor intensity of workers and further improves the casing follow-up drilling efficiency.

[0015] (IV) Compared with the existing drilling rigs with an intermediate rod adding function, the method of synchronously following the pipe with dual power heads of the present invention greatly reduces the drill withdrawal time, simplifies the drill withdrawal process, ensures that the drilling rig has an efficient and fast drill withdrawal process, and provides a safe and reliable solution for the field of mine drilling construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a drilling rig with a dual-power head synchronous pipe drilling device.

[0017] Figure 2 It is a front view of the front power head and the rear power head.

[0018] Figure 3 It is a top view of the front power head and the rear power head.

[0019] Figure 4 It is a schematic diagram of the structure of the front gyrator and the rear gyrator.

[0020] Figure 5 This is a schematic diagram of the structure of the rear gyrator.

[0021] Figure 6 This is a schematic diagram of the structure of the front rotator.

[0022] Figure 7 It is a front view of the connection between the casing head, the dust collection device and the active drill pipe.

[0023] Figure 8 It is the left view of the connection between the casing head, dust collection device and active drill pipe.

[0024] Fig. 9 It is a cross-sectional view of the connection between the casing head, the dust collection device and the active drill pipe.

[0025] Fig.10 This is a schematic diagram of the connection between the drill pipe and the active drill pipe during pipe drilling.

[0026] Fig.11 This is a schematic diagram of the connection between the casing upper assembly and the drill pipe during pipe drilling.

[0027] Fig.12 This is a schematic diagram of casing connection during pipe drilling.

[0028] Fig.13 Schematic diagram of directional drilling in and out.

[0029] The meanings of the numbers in the figure are: 1-support seat, 2-feed body, 3-clamp, 4-rear power head, 5-front power head, 6-upper rod bracket, 7-jib, 8-first casing, 9-second casing, 10-first drill rod, 11-second drill rod.

[0030] 401-rear support plate, 402-rear feeder, 403-rear motor mounting seat, 404-rear motor box, 405-rear rotary motor, 406-active drill rod.

[0031] 501-front support plate, 502-front feeder, 503-front motor mounting seat, 504-front motor box, 505-front rotary motor, 506-dust collecting device, 507-casing head, 508-chuck.

[0032] 50601-dust collecting cylinder, 50602-rear end cover of integrated cylinder, 50603-front end cover of integrated cylinder, 50604-integrated cylinder bearing, 50605-connecting pipe, 50606-connecting pipe cover plate, 50607-slag discharge pipe, 50608-integrated cylinder dust ring, 50609-observation window.

[0033] The technical solution of the present invention is further described below in conjunction with embodiments. DETAILED DESCRIPTION

[0034] It should be noted that all the equipment and components used in the present invention, unless otherwise specified, are those known in the art. For example, the feeder body 2 is a feeder body 2 of a conventional drilling rig known in the prior art. The clamp 3 is a clamp 3 of a conventional drilling rig known in the prior art.

[0035] In accordance with the above technical scheme, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of this application fall within the protection scope of the present invention.

[0036] Embodiment 1:

[0037] This embodiment provides a drilling rig with a dual-power head synchronous pipe drilling device, such as Figure 1As shown, it includes a feeding fuselage 2, and a support seat 1 is rotatably installed at the bottom of the longitudinal front end of the feeding fuselage 2; a clamp 3 is fixedly installed on the upper part of the longitudinal front side of the feeding fuselage 2, and a first sleeve 8 is clamped in the clamp 3; a rear power head 4 is movably installed on the longitudinal rear side of the feeding fuselage 2, and a front power head 5 is arranged between the rear power head 4 and the clamp 3, and the front power head 5 is movably installed on the feeding fuselage 2, and the front power head 5 and the rear power head 4 are arranged opposite to each other; a second sleeve 9 is sleeved on the longitudinal front side of the front power head 5, and a longitudinal front end of a first drill rod 10 is sleeved on the longitudinal rear side of the front power head 5, and the longitudinal rear end of the first drill rod 10 is connected to the rear power head 4; an upper rod bracket 6 is installed on the lateral side of the feeding fuselage 2, and a second drill rod 11 is mounted on the upper rod bracket 6.

[0038] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the rear power head 4 includes a rear support plate 401, on the longitudinal front side of which a pair of rear feeders 402 are installed, and the pair of rear feeders 402 are arranged laterally opposite to each other; a rear motor mounting seat 403 is fixedly installed on the longitudinal rear side of the rear support plate 401, and a rear motor box 404 is installed on the rear motor mounting seat 403; a pair of rear rotary motors 405 are installed in the top of the longitudinal rear side of the rear motor box 404, and an active drill rod 406 is arranged on the longitudinal front side of the rear motor box 404, and the active drill rod 406 is connected to the first drill rod 10.

[0039] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the front power head 5 includes a front support plate 501, on the longitudinal rear side of which a pair of front feeders 502 are installed, and the pair of front feeders 502 are arranged laterally opposite to each other; a front motor mounting seat 503 is fixedly installed on the longitudinal front side of the front support plate 501, and a front motor box 504 is installed on the front motor mounting seat 503; a chuck 508 is installed on the longitudinal rear side of the front motor box 504; a pair of front rotary motors 505 are installed in the top of the longitudinal front side of the front motor box 504, and a dust collecting device 506 is installed in the bottom of the longitudinal front side of the front motor box 504; a casing head 507 is arranged on the longitudinal front side of the dust collecting device 506; the first drill rod 10 passes through the casing head 507, the dust collecting device 506, the front motor box 504, the chuck 508 and the bottom of the rear motor box 404 in sequence from front to back.

[0040] In this embodiment, the clamp 3, the rear power head 4, the front power head 5 and the upper rod support 6 together form a dual-power head drilling device. The clamp 3 is used to clamp the drill rod, the rear power head 4 is used for directional drilling, the front power head 5 is used for casing and pipe drilling and assisting the unbuckling and straightening of the drill rod, and the upper rod support 6 is used to assist the clamping and recovery of the drill rod.

[0041] In this embodiment, the second casing 9 is a casing that has been drilled into the hole, the first casing 8 is a casing to be connected to the second casing 9 in the hole, and the first drill rod 10 is a drill rod to be connected to the second drill rod 11 in the hole.

[0042] In this embodiment, the front motor mounting seat 503, the front motor box 504, the front rotary motor 505, the dust collecting device 506, the casing head 507 and the chuck 508 together constitute the front rotator, which is mounted on the front support plate 501 upside down, and the front feeder 502 is vertically connected to the front support plate 501. The front rotary motor 505 is symmetrically arranged at both ends of the front motor box 504 of the front rotator, and is used to realize the rotation function of the front rotator and supply oil to the front motor box 504; the chuck 508 is installed at the rear of the front motor box 504, and is used to realize the clamping and auxiliary shackle functions of the drill rod; the dust collecting device 506 is installed at the front end of the front motor box 504, and is used to realize the slag removal of the annular gap formed by the drill rod and the casing; the casing head 507 is welded to the front end of the dust collecting device 506, and is used to realize the casing straightening function during the pipe drilling process.

[0043] In this embodiment, the rear motor mounting base 403, the rear motor box 404 and the rear rotary motor 405 together constitute a rear rotator, which is connected to the rear support plate 401; the rear feeder 402 is vertically connected to the rear support plate 401. The rear rotary motor 405 is symmetrically arranged at both ends of the rear motor box 404 of the rear rotator, and is used to realize the rotary function of the rear rotator and supply oil to the rear motor box 404; the active drill rod 406 is connected to the front end of the rear motor box 404, and is used to connect the drill rod for directional drilling to transmit drilling pressure and torque.

[0044] As a specific solution of this embodiment, Figure 7 , Figure 8 and Fig. 9 As shown, the dust collecting device 506 includes a dust collecting barrel 50601, both longitudinal ends of which are open; an integrated barrel rear end cover 50602 is installed at the longitudinal rear end of the dust collecting barrel 50601, and an integrated barrel front end cover 50603 is installed at the longitudinal front end of the dust collecting barrel 50601; an integrated barrel bearing 50604 is installed at the center of the integrated barrel rear end cover 50602 and the integrated barrel front end cover 50603 respectively, and the first drill rod 10 passes through the center of the integrated barrel bearing 50604.

[0045] In this embodiment, the integrated cylinder rear end cover 50602 is welded to the rear end of the dust collecting cylinder 50601, and is connected to the front end of the front motor box 504 of the front rotator by bolts; the integrated cylinder front end cover 50603 is connected to the front end of the dust collecting cylinder 50601 by bolts, and a casing head 507 is welded to the front end thereof. The internal space formed by the integrated cylinder front end cover 50603 and the casing head 507 welded thereon is evenly provided with channels for discharging slag. The integrated cylinder bearing 50604 is respectively installed in the mounting grooves of the integrated cylinder rear end cover 50602 and the integrated cylinder front end cover 50603, and is used for straightening the drill rod, and at the same time, preventing the dust collecting device 506 from being damaged by the rotation of the drill rod; the integrated cylinder dust ring 50608 is respectively installed in the mounting grooves of the integrated cylinder rear end cover 50602 and the integrated cylinder front end cover 50603, and is used for isolating the integrated cylinder bearing 50604 from the inside of the dust collecting cylinder 50601, and preventing the collected drilling slag from entering the integrated cylinder bearing 50604.

[0046] As a specific solution of this embodiment, Figure 7 , Figure 8 and Fig. 9 As shown, a slag discharge hole is provided at the bottom of the dust collecting barrel 50601, and a connecting pipe 50605 is provided at the bottom of the dust collecting barrel 50601. The top end of the connecting pipe 50605 is open and connected to the slag discharge hole of the dust collecting barrel 50601. Both lateral ends of the connecting pipe 50605 are open, and one open lateral end of the connecting pipe 50605 is covered with a connecting pipe cover plate 50606; a slag discharge pipe 50607 is provided at the other lateral end of the connecting pipe 50605, and both ends of the slag discharge pipe 50607 are open, and one lateral end of the slag discharge pipe 50607 is connected to the connecting pipe 50605.

[0047] In this embodiment, the slag discharge pipe 50607 is connected to the end of the connecting pipe 50605 by bolts, and is used as a discharge outlet for drill cuttings and is connected to an external drill cutting conveying pipeline; the connecting pipe 50605 is welded to the lower part of the dust collecting tube 50601, and is used as a conveying channel for the drill cuttings collected by the dust collecting device 506; the connecting pipe cover plate 50606 is connected to the end of the connecting pipe 50605 by bolts, and is used to seal the drill cuttings and as a spare slag discharge outlet.

[0048] As a specific solution of this embodiment, Fig. 9 As shown, an integrated tube dust ring 50608 is installed at the center of the integrated tube rear end cover 50602 and the integrated tube front end cover 50603, and the integrated tube dust ring 50608 is located on the inner side of the integrated tube bearing 50604. In this embodiment, the integrated tube dust ring 50608 is used to seal the dust collecting device 506.

[0049] As a specific solution of this embodiment, Figure 7 , Figure 8 and Fig. 9As shown, the opening at the other lateral end of the slag discharge pipe 50607 is covered with an observation window 50609. In this embodiment, the observation window 50609 is made of a transparent material, such as glass, a transparent acrylic plate, etc. The observation window 50609 is embedded and installed on the connecting pipe cover plate 50606 for observing the slag discharge situation.

[0050] As a specific solution of this embodiment, a suspension arm 7 is installed on the clamp 3. In this embodiment, the suspension arm 7 is used to hang drilling tools such as casing and drill rod.

[0051] Embodiment 2:

[0052] This embodiment provides a method for synchronously following pipe drilling with dual power heads, which adopts the drilling rig with the synchronously following pipe drilling device of embodiment 1. Fig.11 , Fig.12 and Fig.13 As shown, the method specifically comprises the following steps:

[0053] Step 1: Drilling with pipe:

[0054] Step 1.1, Drill Pipe Installation:

[0055] The first drill rod 10 is placed on the upper rod support 6, and after the first drill rod 10 is clamped and transported back to the feed fuselage 2 by operating the upper rod support 6, the position of the upper rod support 6 is kept unchanged.

[0056] Step 1.2, connect the drill pipe to the active drill pipe:

[0057] Operate the front feeder 502 and the rear feeder 402 to feed the front power head 5 and the rear power head 4 forward at the same time, until the active drill rod 406 is docked with the first drill rod 10, start the forward rotation function of the rear power head 4 and cooperate with the rear feeder 402 to complete the buckling process of the active drill rod 406 and the first drill rod 10; then operate the upper rod bracket 6 to return it to its initial position.

[0058] Step 1.3, casing installation:

[0059] After operating the boom 7 to hoist the second casing 9 placed on the ground to the upper part of the feeding fuselage 2, the front feeder 502 is operated to feed the front power head 5 forward until the casing head 507 is inserted into the rear end of the second casing 9.

[0060] Step 1.4, Drill Pipe Connection:

[0061] Continue to start the forward rotation function of the rear power head 4 and cooperate with the rear feeder 402 to complete the threaded connection between the first drill rod 10 and the second drill rod 11 in the hole.

[0062] Step 1.5, casing connection:

[0063] Operate the clamp 3 to loosen the drill rod, continue to operate the front feeder 502 to make the front power head 5 feed forward, and at the same time, the boom 7 cooperates with the front power head 5 to push the first casing 8 forward until the first casing 8 passes through the clamp 3 and connects with the second casing 9 in the hole, and weld the first casing 8 and the second casing 9 to be connected by a welding gun.

[0064] Step 1.6, synchronous pipe drilling construction:

[0065] The front feeder 502, the rear feeder 402 and the rear rotator are operated simultaneously to realize the synchronous drilling construction of pipe following drilling and rotary drilling.

[0066] Step 2: Directional Drilling:

[0067] Step 2.1, adjust the power head to the directional drilling construction position.

[0068] The front power head 5 is fed to the frontmost end of the feeding body 2, and the rear power head 4 is moved back to the rearmost end of the feeding body 2.

[0069] Step 2.2, drill pipe installation.

[0070] The directional drill rod to be installed is placed on the upper rod bracket 6, and after clamping and returning it to the feed fuselage 2 by operating the upper rod bracket 6, the position of the upper rod bracket 6 is kept unchanged.

[0071] Step 2.3, the drill pipe is connected to the active drill pipe.

[0072] Operate the rear feeder 402 to feed the rear power head 4 forward until the active drill rod 406 is docked with the directional drill rod, start the forward rotation function of the rear power head 4 and cooperate with the rear feeder 402 to complete the buckling process of the active drill rod 406 and the directional drill rod; then operate the upper rod bracket 6 to return it to its initial position.

[0073] Step 2.4, drill pipe connection.

[0074] Continue to start the forward rotation function of the rear power head 4 and cooperate with the rear feeder 402 to complete the threaded connection between the directional drill rod to be used for drilling and the second drill rod 11.

[0075] Step 2.5, directional drilling construction:

[0076] The feeding and rotating functions of the rear power head 4 are turned on to start directional drilling construction.

[0077] As a specific solution of this embodiment, after executing step 2.2, the front power head 5 is moved backward to allow the front part of the directional drill rod to pass into the chuck to clamp the directional drill rod. At this time, the upper rod support 6 releases the drill rod and returns it to the initial position.

[0078] As a specific scheme of this embodiment, when executing step 2.3, the directional drill rod is quickly connected to the active drill mouth through the clamping and rotation functions of the front power head 5 in cooperation with the rear power head 4. At the same time, when executing the front buckle and buckle process of the directional drill rod, the front power head 5 loosens the directional drill rod and uses the chuck to straighten it, so as to achieve better alignment and connection between the directional drill rod to be used for drilling and the second drill rod 11 thread.

[0079] Step 3: Back off the drill:

[0080] Step 3.1, adjust the power head to the drill retraction position:

[0081] The reverse and backward functions of the rear power head 4 are operated to realize the release of the active drill rod 406 from the directional drill rod, and then the rear power head 4 is moved backward to the rear end of the feed fuselage 2.

[0082] Step 3.2, directional drill pipe shackle:

[0083] The front rotator, chuck and front feeder 502 of the front power head 5 are operated, and the clamping and releasing functions of the clamp 3 are coordinated to realize the forward and backward movement of the front power head 5 to reverse the rod and shackle.

[0084] Step 3.3, take and place the drill pipe:

[0085] The directional drill rod to be released is grabbed by the upper rod bracket 6, and after being released, it is placed in a horizontal position, and the directional drill rod is hoisted and transported to the drill rod storage place by operating the boom 7.

Claims

1. A drilling rig with a dual-power head synchronous pipe drilling device, comprising a feed body (2), a support seat (1) being rotatably mounted at the bottom of the longitudinal front end of the feed body (2); a clamp (3) being fixedly mounted at the upper part of the longitudinal front side of the feed body (2), a first casing (8) being clamped in the clamp (3); characterized in that: A rear power head (4) is movably mounted on the longitudinal rear side of the feed body (2); a front power head (5) is arranged between the rear power head (4) and the clamp (3); the front power head (5) is movably mounted on the feed body (2); the front power head (5) and the rear power head (4) are arranged opposite to each other; a second sleeve (9) is sleeved inside the longitudinal front side of the front power head (5); a longitudinal front end of a first drill rod (10) is sleeved inside the longitudinal rear side of the front power head (5); and a longitudinal rear end of the first drill rod (10) is connected to the rear power head (4); an upper rod bracket (6) is mounted on one lateral side of the feed body (2); a second drill rod (11) is mounted on the upper rod bracket (6); The rear power head (4) comprises a rear support plate (401), a pair of rear feeders (402) are installed on the longitudinal front side of the rear support plate (401), and the pair of rear feeders (402) are arranged opposite to each other in the transverse direction; a rear motor mounting seat (403) is fixedly installed on the longitudinal rear side of the rear support plate (401), and a rear motor box (404) is installed on the rear motor mounting seat (403); a pair of rear rotary motors (405) are installed in the top of the longitudinal rear side of the rear motor box (404), and an active drill rod (406) is arranged on the longitudinal front side of the rear motor box (404), and the active drill rod (406) is connected to the first drill rod (10); The front power head (5) comprises a front supporting plate (501), a pair of front feeders (502) are installed on the longitudinal rear side of the front supporting plate (501), and the pair of front feeders (502) are arranged opposite to each other in the transverse direction; a front motor mounting seat (503) is fixedly installed on the longitudinal front side of the front supporting plate (501), and a front motor box (504) is installed on the front motor mounting seat (503); a chuck (508) is installed on the longitudinal rear side of the front motor box (504); a pair of front rotary motors (505) are installed in the top of the longitudinal front side of the front motor box (504), and a dust collecting device (506) is installed in the bottom of the longitudinal front side of the front motor box (504); a sleeve head (507) is arranged on the longitudinal front side of the dust collecting device (506); The first drill rod (10) passes through the casing head (507), the dust collecting device (506), the front motor box (504), the chuck (508) and the bottom of the rear motor box (404) in sequence from front to back.

2. The drilling rig with a dual-power head synchronous pipe drilling device according to claim 1, characterized in that: The dust collecting device (506) comprises a dust collecting cylinder (50601), both longitudinal ends of which are open; an integrated cylinder rear end cover (50602) is installed at the longitudinal rear end of the dust collecting cylinder (50601), and an integrated cylinder front end cover (50603) is installed at the longitudinal front end of the dust collecting cylinder (50601); an integrated cylinder bearing (50604) is installed at the center of each of the integrated cylinder rear end cover (50602) and the integrated cylinder front end cover (50603), and the first drill rod (10) passes through the center of the integrated cylinder bearing (50604).

3. The drilling rig with a dual-power head synchronous pipe drilling device as claimed in claim 2, characterized in that: The bottom of the dust collecting barrel (50601) is provided with a slag discharge hole, and the bottom of the dust collecting barrel (50601) is provided with a connecting pipe (50605), the top of the connecting pipe (50605) is open and connected to the slag discharge hole of the dust collecting barrel (50601), both lateral ends of the connecting pipe (50605) are open, and the open lateral end of the connecting pipe (50605) is covered with a connecting pipe cover plate (50606); the other lateral end of the connecting pipe (50605) is provided with a slag discharge pipe (50607), both ends of the slag discharge pipe (50607) are open, and one lateral end of the slag discharge pipe (50607) is connected to the connecting pipe (50605).

4. The drilling rig with a dual-power head synchronous pipe drilling device as claimed in claim 2, characterized in that: An integrated tube dust ring (50608) is also installed at the center of the integrated tube rear end cover (50602) and the integrated tube front end cover (50603), and the integrated tube dust ring (50608) is located on the inner side of the integrated tube bearing (50604).

5. The drilling rig with a dual-power head synchronous pipe drilling device as claimed in claim 3, characterized in that: The opening at the other lateral end of the slag discharge pipe (50607) is covered with an observation window (50609).

6. The drilling rig with a dual-power head synchronous pipe drilling device according to claim 1, characterized in that: A suspension arm (7) is installed on the clamp (3).

7. A method for synchronously following pipe drilling with dual power heads, characterized in that: The method adopts a drilling rig with a dual-power head synchronous pipe drilling device as described in any one of claims 1 to 6.

8. The method for synchronously following pipe drilling with dual power heads as claimed in claim 7, characterized in that: The method comprises the following steps: Step 1: Drilling with pipe: Step 1.1, Drill Pipe Installation: The first drill rod (10) is placed on the upper rod support (6), and the upper rod support (6) is operated to clamp the first drill rod (10) and transport it back to the feed body (2), and the position of the upper rod support (6) is kept unchanged; Step 1.2, connect the drill pipe to the active drill pipe: The front feeder (502) and the rear feeder (402) are operated to realize the front power head (5) and the rear power head (4) to feed forward simultaneously until the active drill rod (406) is docked with the first drill rod (10), and then the forward rotation function of the rear power head (4) is started and the rear feeder (402) is cooperated to complete the buckling process of the active drill rod (406) and the first drill rod (10); and then the upper rod support (6) is operated to return it to the initial position; Step 1.3, casing installation: After operating the lifting arm (7) to hoist the second casing (9) placed on the ground onto the upper part of the feeding machine body (2), the front feeder (502) is operated to feed the front power head (5) forward until the casing head (507) is inserted into the rear end of the second casing (9); Step 1.4, Drill Pipe Connection: Continue to start the forward rotation function of the rear power head (4) and cooperate with the rear feeder (402) to complete the threaded connection between the first drill rod (10) and the second drill rod (11) in the hole; Step 1.5, casing connection: The clamp (3) is operated to release the drill pipe, and the front feeder (502) is continued to be operated to make the front power head (5) feed forward, and at the same time, the boom (7) cooperates with the front power head (5) to push the first casing (8) forward, until the first casing (8) passes through the clamp (3) and is connected with the second casing (9) in the hole, and the first casing (8) and the second casing (9) are welded at the connection point by a welding gun; Step 1.6, synchronous pipe drilling construction: The front feeder (502), the rear feeder (402) and the rear rotator are operated simultaneously to achieve synchronous drilling construction of pipe following drilling and rotary drilling.

9. The method for synchronously following pipe drilling with dual power heads as claimed in claim 8, characterized in that: The method further comprises the steps of: Step 2: Directional Drilling: Step 2.1, the power head is adjusted to the directional drilling construction position; The front power head (5) is fed to the frontmost end of the feeding body (2), and the rear power head (4) is moved back to the rearmost end of the feeding body (2); Step 2.2, drill pipe installation; The directional drill rod to be installed is placed on the upper rod bracket (6), and the upper rod bracket (6) is operated to clamp and transport it back to the feed body (2), and the position of the upper rod bracket (6) is kept unchanged; Step 2.3, the drill pipe is connected to the active drill pipe; The rear feeder (402) is operated to feed the rear power head (4) forward until the active drill rod (406) is connected to the directional drill rod, and then the forward rotation function of the rear power head (4) is started and the rear feeder (402) is cooperated to complete the buckling process of the active drill rod (406) and the directional drill rod; then the upper rod support (6) is operated to return it to the initial position; Step 2.4, drill pipe connection; Continue to start the forward rotation function of the rear power head (4) and cooperate with the rear feeder (402) to complete the threaded connection between the directional drill rod to be used for drilling and the second drill rod (11); Step 2.5, directional drilling construction: The feeding and rotating functions of the rear power head (4) are turned on to start directional drilling construction.

10. The method for synchronously following pipe drilling with dual power heads as claimed in claim 9, characterized in that: The method further comprises the steps of: Step 3: Back off the drill: Step 3.1, adjust the power head to the drill retraction position: The reverse and backward functions of the rear power head (4) are operated to realize the release of the active drill rod (406) from the directional drill rod, and then the rear power head (4) is moved backward to the rear end of the feed body (2); Step 3.2, directional drill pipe shackle: The front rotator, chuck and front feeder (502) of the front power head (5) are operated to cooperate with the clamping and releasing functions of the clamp (3) to realize the front power head (5) moving forward and backward to reverse the rod and shackle; Step 3.3, take and place the drill pipe: The directional drill rod to be released is grabbed by the upper rod bracket (6), and after being released, it is placed in a horizontal position, and the directional drill rod is hoisted and transported to a drill rod storage place by operating the lifting arm (7).

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