A drilling rig and method with dual power head synchronous follow-up drilling device

Abstract

The application provides a drilling machine and method with double power head synchronous pipe following drilling device; the drilling machine comprises a supporting seat, a feeding machine body is installed on the supporting seat, 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 casing is sleeved on the longitudinal front side of the front power head, and an upper rod support is installed on the transverse side of the feeding machine body; the method comprises three steps of pipe following drilling, directional drilling and drilling out. Since the double independent operation power heads are adopted, the front power head is a chuck rear-mounted casing pushing power head, and the rear power head is a main driven drill rod type power head, so that the synchronous pipe following drilling, conventional rotary drilling, directional drilling and rapid drilling out multiple processes can be realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mine drilling, and relates to a drilling device and a drilling machine, in particular to a drilling machine with a double-power-head synchronous pipe-following drilling device and a method. BACKGROUND

[0002] In the field of mines, in order to obtain engineering geological conditions, hydrogeological conditions and hidden disaster-causing factors, and to reasonably and scientifically formulate production schemes such as tunneling and coal mining according to the detection results, currently, the methods of geophysical prospecting and drilling are mainly used. The drilling method is the most direct technical means to obtain stratum anomaly data, especially in obtaining drilling data through directional long-distance drilling, which can reasonably evaluate stratum information such as stratum structure and coal and rock layer distribution, and at the same time, provide a premise for directional exploration and construction management of gas enrichment areas, water-rich abnormal areas, abnormal geological structure belts and the like, and provide a drilling channel for subsequent gas extraction, water drainage and pressure reduction, grouting reinforcement and other management methods.

[0003] When drilling into unstable strata such as soft coal seams, broken zones and water-sensitive strata, the problem of hole collapse during hole formation is encountered, and risks such as sticking and burying of the drill are easily caused, which seriously affects the drilling construction efficiency. The pipe-following drilling with a casing can effectively avoid this problem, that is, during the drilling process, the drill pipe power head drives the drill pipe drilling tool to drill, and the casing power head drives the casing to rotate at a low speed or to follow the pipe drilling in a straight pushing manner, so this drilling method needs to be matched with a double-power-head drilling machine.

[0004] Currently, the double-power-head drilling machine mainly has the following problems: ① low pipe-following drilling efficiency, mainly manifested in problems such as difficulty in screwing the casing thread and poor centering of the casing thread; ② difficulty in synchronizing the casing and the drill pipe during drilling; and ③ complex matching process of pipe-following drilling and rotary drilling or directional drilling. SUMMARY

[0005] In view of the defects and deficiencies of the prior art, the purpose of the present application is to provide a drilling machine with a double-power-head synchronous pipe-following drilling device and a method, which solves the technical problem of low pipe-following drilling efficiency caused by difficulty in screwing the casing thread and poor centering of the casing thread in the prior art.

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

[0007] The utility model provides a kind of drilling rig with double power head synchronous pipe following drilling device, including feeding body, the bottom of the longitudinal front end of feeding body is rotatably installed with support seat;The upper portion of the longitudinal front side of feeding body is fixedly installed with gripper, the longitudinal front side of feeding body is fixedly installed with gripper, and the first casing is clamped in gripper;The longitudinal rear side of the feeding body is movably installed with rear power head, and front power head is arranged between rear power head and gripper, and front power head is movably installed on feeding body, and front power head and rear power head are oppositely arranged;The longitudinal front side of front power head is sleeved with second casing, and the longitudinal front end of first drill rod is sleeved in the longitudinal rear side of front power head, and the longitudinal rear end of first drill rod is connected with rear power head;Upper rod support is installed on the lateral side of feeding body, and second drill rod is arranged on upper rod support.

[0008] The rear power head includes a rear support plate, a pair of rear feeders are installed on the longitudinal front side of the rear support plate, and the pair of rear feeders are arranged transversely 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 a driving drill rod is arranged on the longitudinal front side of the rear motor box, and the driving drill rod is connected with the first drill rod.

[0009] The front power head includes a front support plate, a pair of front feeders are installed on the longitudinal rear side of the front support plate, and the pair of front feeders are arranged transversely 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 sequentially penetrates the casing head, the dust collecting device, the front motor box and the chuck from front to back.

[0010] The utility model also protects a kind of double power head synchronous pipe following drilling method, which uses the drilling rig with double power head synchronous pipe following drilling device as described above.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects:

[0012] (I) The utility model adopts double independent operation power head, wherein the front power head is the power head of chuck rear-mounted plus casing top-in, and the rear power head is the power head of driving drill rod type.The utility model can realize synchronous pipe following drilling, conventional rotary drilling, directional drilling and fast drilling multiple processes.

[0013] (II) The drilling rig with the double-power-head synchronous follow-up pipe drilling device has the double-power-head clamping drill pipe, can adapt to the fast make-up and break-out function of the long drill pipe, meets the centralizing requirement of the long drill pipe, improves the make-up efficiency of the casing thread and the centralizing efficiency of the casing and the thread, and further improves the follow-up pipe drilling efficiency, solves the problems in the follow-up pipe drilling, and provides technical and equipment guarantee for popularization and application of the follow-up pipe drilling technology.

[0014] (III) The follow-up pipe drilling construction is carried out by using the drilling rig with the double-power-head synchronous follow-up pipe drilling device, labor intensity of workers is reduced, and the follow-up pipe drilling efficiency is further improved.

[0015] (IV) The double-power-head synchronous follow-up pipe drilling method greatly reduces the pipe pulling time, simplifies the pipe pulling process, ensures that the drilling rig has efficient and rapid pipe pulling process flow, and provides a safe and reliable scheme for the mine drilling construction field. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the drilling rig with the double-power-head synchronous follow-up 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 structure schematic view of the front rotary device and the rear rotary device.

[0020] Figure 5 It is a structure schematic view of the rear rotary device.

[0021] Figure 6 It is a structure schematic view of the front rotary device.

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

[0023] Figure 8 It is a left view of the casing head, the dust collecting device and the main drill pipe connection.

[0024] Figure 9 It is a sectional view of the casing head, the dust collecting device and the main drill pipe connection.

[0025] Figure 10 It is a schematic view of the drill pipe and the main drill pipe connection when the follow-up pipe drilling.

[0026] Figure 11 It is a schematic view of the casing upper device and the drill pipe connection when the follow-up pipe drilling.

[0027] Figure 12 Figure 1 is a schematic diagram of casing connection for follow-up pipe drilling.

[0028] Figure 13 Figure 2 is a schematic diagram of directional drilling and retraction.

[0029] The meanings of the various reference numbers in the figure are as follows: 1 - support seat, 2 - feeding body, 3 - gripper, 4 - rear power head, 5 - front power head, 6 - upper rod support, 7 - boom, 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 - driving 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 collection device, 507 - casing head, 508 - chuck.

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

[0033] The technical solutions of the present application are further described below in conjunction with embodiments. DETAILED DESCRIPTION

[0034] It should be noted that all the devices and parts used in the present application, unless otherwise specified, are devices and parts known in the art. For example, the feeding body 2 is a conventional drill feeding body 2 known in the prior art. The gripper 3 is a conventional drill gripper 3 known in the prior art.

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

[0036] Example 1

[0037] This embodiment gives a drilling machine with a double-power-head synchronous follow-up pipe drilling device, as shown in Figure 1. Figure 1As shown, the feeding body 2 is longitudinally provided with a support base 1 rotatably mounted at the bottom of the longitudinal front end of the feeding body 2; the feeding body 2 is longitudinally provided with a gripper 3 fixedly mounted at the upper portion of the longitudinal front side of the feeding body 2, and the first casing 8 is clamped in the gripper 3; the feeding body 2 is longitudinally provided with a rear power head 4 movably mounted at the longitudinal rear side of the feeding body 2, and the feeding body 2 is longitudinally provided with a front power head 5 movably mounted at the feeding body 2, and the front power head 5 is oppositely arranged with the rear power head 4; the front power head 5 is longitudinally provided with a second casing 9 sleeved at the longitudinal front side of the front power head 5, and the front power head 5 is longitudinally provided with the longitudinal front end of the first drill rod 10 sleeved at the longitudinal rear side of the front power head 5, and the longitudinal rear end of the first drill rod 10 is connected with the rear power head 4; the feeding body 2 is transversely provided with an upper rod support 6, and the second drill rod 11 is arranged on the upper rod support 6.

[0038] As shown in Figure 2 , Figure 3 , Figure 4 and Figure 5 , the rear power head 4 comprises a rear supporting plate 401, and a pair of rear feeders 402 are arranged on the longitudinal front side of the rear supporting plate 401 and transversely oppositely arranged; the rear supporting plate 401 is longitudinally provided with a rear motor mounting seat 403 fixedly mounted at the longitudinal rear side of the rear supporting plate 401, and the rear motor mounting seat 403 is provided with a rear motor box 404; a pair of rear rotary motors 405 are arranged in the top of the longitudinal rear side of the rear motor box 404, and the front power head 5 is provided with a driving drill rod 406 arranged at the longitudinal front side of the rear motor box 404, and the driving drill rod 406 is connected with the first drill rod 10.

[0039] As shown in Figure 2 , Figure 3 , Figure 4 and Figure 6 , the front power head 5 comprises a front supporting plate 501, and a pair of front feeders 502 are arranged on the longitudinal rear side of the front supporting plate 501 and transversely oppositely arranged; the front supporting plate 501 is longitudinally provided with a front motor mounting seat 503 fixedly mounted at the longitudinal front side of the front supporting plate 501, and the front motor mounting seat 503 is provided with a front motor box 504; the front motor box 504 is longitudinally provided with a chuck 508; a pair of front rotary motors 505 are arranged in the top of the longitudinal front side of the front motor box 504, and a dust collecting device 506 is arranged in the bottom of the longitudinal front side of the front motor box 504; the longitudinal front side of the dust collecting device 506 is provided with a casing head 507; the first drill rod 10 sequentially penetrates the casing head 507, the dust collecting device 506, the front motor box 504 and the chuck 508 from front to back.

[0040] In the embodiment, the gripper 3, the rear power head 4, the front power head 5 and the upper rod support 6 jointly constitute a double power head drilling device. The gripper 3 is used for clamping 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 assists in the unbuckling and centralizing of the drill rod, and the upper rod support 6 is used for assisting in the clamping and recycling of the drill rod.

[0041] In this embodiment, the second casing 9 is a casing which has been run in hole, the first casing 8 is a casing to be connected with the second casing 9 in hole, and the first drill pipe 10 is a drill pipe to be connected with the second drill pipe 11 in 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 jointly constitute a front rotary device, the front rotary device is inverted on the front supporting plate 501, and the front feeder 502 is vertically connected to the front supporting plate 501. The front rotary motor 505 is symmetrically arranged at two ends of the front motor box 504 of the front rotary device, and is used for realizing the rotation function of the front rotary device and supplying oil to the front motor box 504. The chuck 508 is arranged at the rear of the front motor box 504, and is used for realizing the clamping of the drill pipe and the auxiliary unthreading function. The dust collecting device 506 is arranged at the front end of the front motor box 504, and is used for realizing the residue discharge of the annular gap formed by the drill pipe and the casing. The casing head 507 is welded to the front end of the dust collecting device 506, and is used for realizing the centralizing function of the casing in the pipe running process.

[0043] In this embodiment, the rear motor mounting seat 403, the rear motor box 404 and the rear rotary motor 405 jointly constitute a rear rotary device, and the rear rotary device is connected to the rear supporting plate 401. The rear feeder 402 is vertically connected to the rear supporting plate 401. The rear rotary motor 405 is symmetrically arranged at two ends of the rear motor box 404 of the rear rotary device, and is used for realizing the rotation function of the rear rotary device and supplying oil to the rear motor box 404. The driving drill pipe 406 is connected to the front end of the rear motor box 404, and is used for connecting the drill pipe used for directional drilling and transmitting the drilling pressure and the torque.

[0044] As a specific scheme of this embodiment, as shown in Figure 7 、 Figure 8 and Figure 9 , the dust collecting device 506 comprises a dust collecting cylinder 50601, both longitudinal ends of the dust collecting cylinder 50601 are open. A dust collecting cylinder rear end cover 50602 is arranged at the longitudinal rear end of the dust collecting cylinder 50601, and a dust collecting cylinder front end cover 50603 is arranged at the longitudinal front end of the dust collecting cylinder 50601. A dust collecting cylinder bearing 50604 is arranged at the center of the dust collecting cylinder rear end cover 50602 and the dust collecting cylinder front end cover 50603 respectively, and the first drill pipe 10 passes through the center of the dust collecting cylinder 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 bolted to the front end of the front motor box 504 of the front swivel. The integrated cylinder front end cover 50603 is bolted to the front end of the dust collecting cylinder 50601, and a sleeve head 507 is welded to the front end of the integrated cylinder front end cover 50603. The internal space formed by the integrated cylinder front end cover 50603 and the sleeve head 507 welded thereto is evenly provided with channels for discharging drill cuttings. The integrated cylinder bearings 50604 are respectively installed in the mounting grooves of the integrated cylinder rear end cover 50602 and the integrated cylinder front end cover 50603, and are used for the centralizing of drill rods and the prevention of damage to the dust collecting device 506 caused by the rotation of the drill rods. The integrated cylinder dustproof rings 50608 are respectively installed in the mounting grooves of the integrated cylinder rear end cover 50602 and the integrated cylinder front end cover 50603, and are used for the isolation of the integrated cylinder bearings 50604 from the interior of the dust collecting cylinder 50601, so as to prevent the collected drill cuttings from entering the integrated cylinder bearings 50604.

[0046] As a specific scheme of this embodiment, as shown in Figure 7 、 Figure 8 and Figure 9 , the bottom of the dust collecting cylinder 50601 is provided with a discharge hole, and the bottom of the dust collecting cylinder 50601 is provided with a connecting pipe 50605. The top end of the connecting pipe 50605 is open and communicates with the discharge hole of the dust collecting cylinder 50601. The transverse ends of the connecting pipe 50605 are open. The open transverse end of the connecting pipe 50605 is covered with a connecting pipe cover plate 50606. The transverse end of the connecting pipe 50605 is provided with a discharge pipe 50607, and the two ends of the discharge pipe 50607 are open. The transverse end of the discharge pipe 50607 communicates with the connecting pipe 50605.

[0047] In this embodiment, the discharge pipe 50607 is bolted to the end of the connecting pipe 50605 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 cylinder 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 bolted to the end of the connecting pipe 50605 and is used for the plugging of drill cuttings and the backup discharge port.

[0048] As a specific scheme of this embodiment, as shown in Figure 9 , an integrated cylinder dustproof ring 50608 is further installed at the center of the integrated cylinder rear end cover 50602 and the integrated cylinder front end cover 50603, respectively. The integrated cylinder dustproof ring 50608 is located on the inner side of the integrated cylinder bearing 50604. In this embodiment, the integrated cylinder dustproof ring 50608 is used for sealing the dust collecting device 506.

[0049] As a specific scheme of this embodiment, as shown in Figure 7 、 Figure 8 and Figure 9As shown, the open end of the discharge pipe 50607 at the other transverse end is covered with an observation window 50609. In this embodiment, the observation window 50609 is made of transparent material, such as glass, transparent acrylic plate, etc., and is embeddedly installed on the connecting pipe cover plate 50606 for observation of the discharge condition.

[0050] As a specific solution of this embodiment, the clamp 3 is provided with a hoist 7. In this embodiment, the hoist 7 is used for hoisting a casing, a drill pipe or the like drilling tool.

[0051] Embodiment 2:

[0052] This embodiment provides a method for synchronous casing-following drilling by double power heads. The method uses the drilling rig with the synchronous casing-following drilling device by double power heads according to Embodiment 1. As shown in Figs. Figure 11 、 Figure 12 and Figure 13 , the method specifically includes the following steps:

[0053] Step one, casing-following drilling:

[0054] Step 1.1, drill pipe loading:

[0055] The first drill pipe 10 is placed on the upper pipe support 6. After the first drill pipe 10 is clamped and rotated by the upper pipe support 6 and delivered to the feeding machine body 2, the position of the upper pipe support 6 is kept unchanged.

[0056] Step 1.2, drill pipe connection with the main drill pipe:

[0057] The front feeder 502 and the rear feeder 402 are operated to realize the forward feeding of the front power head 5 and the rear power head 4 at the same time. After the main drill pipe 406 is well connected with the first drill pipe 10, the forward rotation function of the rear power head 4 is started and the rear feeder 402 is operated to complete the make-up procedure of the main drill pipe 406 and the first drill pipe 10. Then the upper pipe support 6 is operated to return to the initial position.

[0058] Step 1.3, casing loading:

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

[0060] Step 1.4, drill pipe connection:

[0061] The forward rotation function of the rear power head 4 is continuously started and the rear feeder 402 is operated to complete the thread connection of the first drill pipe 10 and the second drill pipe 11 in the hole.

[0062] Step 1.5, casing connection:

[0063] The operating clamp 3 releases the drill pipe, and the front feeder 502 is continuously operated to advance the front power head 5 forward, while the boom 7 cooperates with the front power head 5 to advance the first casing 8 forward until the first casing 8 is connected with the second casing 9 in the hole, and the welding gun is used to weld the first casing 8 and the second casing 9.

[0064] Step 1.6, synchronous follow-up pipe drilling construction:

[0065] The front feeder 502, the rear feeder 402 and the rear rotary device are operated at the same time to realize the synchronous drilling construction of the follow-up pipe drilling and the rotary drilling.

[0066] Step two, directional drilling:

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

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

[0069] Step 2.2, the drill pipe is loaded.

[0070] The directional drill pipe to be loaded is placed on the upper pipe support 6, and after the upper pipe support 6 is clamped and rotated to the feeding body 2, the position of the upper pipe support 6 is kept unchanged.

[0071] Step 2.3, the drill pipe is connected with the driving drill pipe.

[0072] The rear feeder 402 is operated to realize the forward feeding of the rear power head 4, and after the driving drill pipe 406 is connected with the directional drill pipe, the forward rotation function of the rear power head 4 is started and cooperated with the rear feeder 402 to complete the make-up procedure of the driving drill pipe 406 and the directional drill pipe, and then the upper pipe support 6 is operated to return to the initial position.

[0073] Step 2.4, the drill pipe is connected.

[0074] The forward rotation function of the rear power head 4 is continuously started and cooperated with the rear feeder 402 to complete the screw connection of the directional drill pipe to be drilled and the second drill pipe 11.

[0075] Step 2.5, directional drilling construction:

[0076] The feeding and rotation functions of the rear power head 4 are started to begin the directional drilling construction.

[0077] As a specific scheme of the embodiment, after step 2.2 is performed, the front part of the directional drill pipe is inserted into the chuck by moving the front power head 5 backward to clamp the directional drill pipe, and at this time, the upper pipe support 6 is released to return to the initial position.

[0078] As a specific scheme of the embodiment, when step 2.3 is performed, the directional drill rod is connected with the main drill opening by the clamping and rotating function of the front power head 5 in cooperation with the rear power head 4, and at the same time, when the directional drill rod is connected with the second drill rod 11 by screwing, the front power head 5 releases the directional drill rod, and the chuck is used to right the directional drill rod, so that the directional drill rod to be drilled is connected with the second drill rod 11 by screwing.

[0079] Step three, drilling:

[0080] Step 3.1, the power head is adjusted to the drilling position:

[0081] The reverse and backward functions of the rear power head 4 are operated to realize the uncoupling of the main drill rod 406 and the directional drill rod, and then the rear power head 4 is moved to the rear end of the feeding body 2.

[0082] Step 3.2, the directional drill rod is uncoupled:

[0083] The front rotating device, chuck and front feeder 502 of the front power head 5 are operated in cooperation with the clamping and releasing functions of the gripper 3 to realize the front and rear movement of the front power head 5 to uncouple the drill rod.

[0084] Step 3.3, the drill rod is taken and placed:

[0085] The directional drill rod to be uncoupled is grabbed by the rod lifting support 6, and after being uncoupled, it is taken and placed in a horizontal position, and the directional drill rod is hoisted and transported to the drill rod storage place by operating the lifting arm 7.

Claims

1. A drilling rig with a dual-power head synchronous casing drilling device, comprising a feed body (2), wherein a support base (1) is rotatably mounted on the bottom of the longitudinal front end of the feed body (2); a clamp (3) is fixedly mounted on the upper part of the longitudinal front side of the feed body (2), and a first casing (8) is clamped inside the clamp (3); characterized in that: The feed body (2) is movably mounted with a rear power head (4) on its longitudinal rear side. A front power head (5) is provided 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 fitted inside the longitudinal front side of the front power head (5). The longitudinal front end of the first drill rod (10) is fitted inside the longitudinal rear side of the front power head (5). 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 one side of the feed body (2). A second drill rod (11) is mounted on the upper rod bracket (6). The rear power head (4) includes 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 laterally opposite 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 housing (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 housing (404), and an active drill rod (406) is provided on the longitudinal front side of the rear motor housing (404), and the active drill rod (406) is connected to the first drill rod (10). The front power head (5) includes a front support plate (501), a pair of front feeders (502) are mounted on the longitudinal rear side of the front support plate (501), and the pair of front feeders (502) are arranged laterally opposite each other; a front motor mounting base (503) is fixedly mounted on the longitudinal front side of the front support plate (501), and a front motor housing (504) is mounted on the front motor mounting base (503); a chuck (508) is mounted on the longitudinal rear side of the front motor housing (504); a pair of front rotary motors (505) are mounted in the top of the longitudinal front side of the front motor housing (504), and a dust collection device (506) is mounted in the bottom of the longitudinal front side of the front motor housing (504); a sleeve head (507) is provided on the longitudinal front side of the dust collection device (506). The first drill pipe (10) passes through the casing head (507), dust collection device (506), front motor box (504) and chuck (508) from front to back.

2. The drilling rig with a dual-power head synchronous casing drilling device as described in claim 1, characterized in that, The dust collection device (506) includes a dust collection cylinder (50601), both ends of which are open in the longitudinal direction; an integrated cylinder rear end cover (50602) is installed at the rear end of the dust collection cylinder (50601), and an integrated cylinder front end cover (50603) is installed at the front end of the dust collection cylinder (50601); an integrated cylinder bearing (50604) is installed at the center 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 casing drilling device as described in claim 2, characterized in that, The dust collection cylinder (50601) has a slag discharge hole at its bottom and a connecting pipe (50605) at its bottom. The top of the connecting pipe (50605) is open and connected to the slag discharge hole of the dust collection cylinder (50601). Both ends of the connecting pipe (50605) are open, and the open end of the connecting pipe (50605) is covered by a connecting pipe cover plate (50606). The other 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 the 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 casing drilling device as described in claim 2, characterized in that, An integrated cylinder dustproof ring (50608) is also installed at the center of the rear end cover (50602) and the front end cover (50603) of the integrated cylinder, and the integrated cylinder dustproof ring (50608) is located inside the integrated cylinder bearing (50604).

5. The drilling rig with a dual-power head synchronous casing drilling device as described in claim 3, characterized in that, The open end of the slag discharge pipe (50607) is covered with an observation window (50609).

6. The drilling rig with a dual-power head synchronous casing drilling device as described in claim 1, characterized in that, The clamp (3) is equipped with a boom (7).

7. A method for simultaneous casing drilling with dual power heads, characterized in that, The method employs a drilling rig with a dual-power head synchronous casing drilling device as described in any one of claims 1 to 6.

8. The method for synchronous casing drilling with dual power heads as described in claim 7, characterized in that, The method includes the following steps: Step 1, Drilling with the casing: Step 1.1, Install the drill pipe: Place the first drill rod (10) on the upper rod support (6), and after clamping the first drill rod (10) and transferring it back to the feed machine body (2) by operating the upper rod support (6), keep the position of the upper rod support (6) unchanged. Step 1.2, connecting the drill pipe to the drive drill pipe: Operate the front feeder (502) and the rear feeder (402) to simultaneously feed the front power head (5) and the rear power head (4) forward until the active drill rod (406) is properly connected to the first drill rod (10). Then, start the forward rotation function of the rear power head (4) and cooperate with the rear feeder (402) to complete the connection process between the active drill rod (406) and the first drill rod (10). Then, operate the upper rod support (6) to return it to the initial position. Step 1.3, Installing the sleeve: After the boom (7) lifts the second sleeve (9) placed on the ground onto the upper part of the feeder body (2), the front feeder (502) is operated to feed the front power head (5) forward until the sleeve head (507) is inserted into the rear end of the second sleeve (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, Sleeve Connection: Operate the clamp (3) to release the drill rod, and continue to operate the feeder (502) to feed the front power head (5) forward. At the same time, the boom (7) cooperates with the front power head (5) to push the first sleeve (8) forward until the first sleeve (8) passes through the clamp (3) and is connected to the second sleeve (9) in the hole. Then, weld the connection between the first sleeve (8) and the second sleeve (9) using a welding torch. Step 1.6, Simultaneous casing drilling: Simultaneous operation of the front feeder (502), rear feeder (402) and rear rotary head enables synchronous drilling construction of casing drilling and rotary drilling.

9. The method for synchronous casing drilling with dual power heads as described in claim 8, characterized in that, The method also includes the following steps: Step 2, directional drilling: Step 2.1: Adjust the power head to the directional drilling position; The front power head (5) is fed into the front end of the feed machine body (2), and the rear power head (4) is moved to the rear end of the feed machine body (2); Step 2.2, install on the drill pipe; Place the directional drill rod to be installed on the upper rod support (6), clamp it by operating the upper rod support (6) and transfer it back to the feed body (2), and keep the position of the upper rod support (6) unchanged. Step 2.3: Connect the drill pipe to the active drill pipe; After operating the feeder (402), the rear power head (4) is fed forward until the active drill rod (406) is properly connected with the directional drill rod. Then, the forward rotation function of the rear power head (4) is activated and, in conjunction with the feeder (402), the upper connection process of the active drill rod (406) and the directional drill rod is completed. Then, the upper rod support (6) is operated to return it to its 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 drilled and the second drill rod (11); Step 2.5, directional drilling construction: After turning on the power head (4), the feed and rotation functions are activated, and directional drilling construction begins.

10. The method for synchronous casing drilling with dual power heads as described in claim 9, characterized in that, The method also includes the following steps: Step 3, Removing the drill: Step 3.1, adjust the power head to the retracting position: After operating the reverse and backward functions of the power head (4), the active drill rod (406) and the directional drill rod are disengaged, and then the power head (4) is moved to the rear end of the feed body (2). Step 3.2, directional drill pipe uncoupling: The front rotary head (5), chuck, and front feeder (502) of the front power head (5) are operated in conjunction with the clamping and releasing functions of the clamp (3) to realize the front power head (5) moving back and forth to unscrew the rod. Step 3.3, Removing and Placing Drill Rods: The directional drill rod to be unhooked is grabbed by the upper rod support (6), and after unhooking, it is placed in a horizontal position. The directional drill rod is then hoisted and transported to the drill rod storage location by operating the boom (7).

Images