Drill rod of rotary drilling rig, rotary drilling rig and method for changing the number of sections of drill rod of rotary drilling rig

Abstract

The present invention provides a rotary drilling rig drill rod, a rotary drilling rig, and a method for changing the number of sections of a rotary drilling rig drill rod. The rotary drilling rig drill rod includes a first drill rod section, a first core rod, a second core rod, and an increasing and decreasing rod. The first drill rod section is telescopically sleeved with n-2 intermediate rods in sequence, where n is a positive integer greater than or equal to 2. The second core rod is telescopically sleeved in the increasing and decreasing rod. When n is greater than or equal to 3, the first core rod and the increasing and decreasing rod are selectively telescopically sleeved on the last intermediate rod of the n-2 intermediate rods. When n is equal to 2, the first core rod and the increasing and decreasing rod are selectively telescopically sleeved on the first drill rod section. In the rotary drilling rig drill rod, the rotary drilling rig, and the method for changing the number of sections of a rotary drilling rig drill rod of the present invention, the number of sections of the rotary drilling rig drill rod can be changed to meet different working requirements and working conditions such as different drilling depths and different hardness geology, thereby greatly improving the adaptability of the rotary drilling rig drill rod, without the need to provide multiple drilling rigs with various different rules.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary drilling rigs, in particular to a drill rod of a rotary drilling rig, a rotary drilling rig and a method for changing the number of sections of the drill rod of a rotary drilling rig. Background Art

[0002] A rotary drilling rig is a construction machine suitable for drilling holes in building foundation projects. It is mainly suitable for construction in sandy soil, clay soil, silty soil and other soil layers. It is widely used in various foundation construction projects such as bored piles, continuous walls, and foundation reinforcement. It generally adopts a hydraulic crawler telescopic chassis, a self-lifting and foldable drill mast, a telescopic drill rod, automatic vertical detection and adjustment, and a digital display of hole depth. The whole machine is generally operated with hydraulic pilot control and load sensing, and is characterized by light and comfortable operation.

[0003] like Figure 1 and Figure 2 As shown, a drill pipe for a rotary drilling rig includes a first drill pipe section 11, a second drill pipe section 12, a third drill pipe section 13, and a fourth drill pipe section 14. The inner and outer sides of the first drill pipe section 11 are respectively provided with a first inner key 112 and a first outer key 114. The inner and outer sides of the second drill pipe section 12 are respectively provided with a second inner key 122 and a second outer key 124. The inner and outer sides of the third drill pipe section 13 are respectively provided with a third inner key 132 and a third outer key 134. The outer side of the fourth drill pipe section 14 is provided with a fourth outer key 144. The drill pipe of the rotary drilling rig transmits torque and pressure via these inner and outer keys.

[0004] For the above rotary drilling rig drill rod, the following problems are common:

[0005] 1. When the rotary drilling rig is working, the bottom of the innermost fourth drill pipe section 14 is a high-frequency working area. The more drill pipe sections there are, the smaller the diameter of the fourth drill pipe section 14 is, and the weaker the torsion and bending resistance of the fourth drill pipe section 14 is. When the construction hole is deep and the ground is hard, the rotary drilling rig needs to apply a large torque and pressure to the drill pipe to drill. At this time, the fourth drill pipe section 14 is prone to cracking or breaking, causing great losses.

[0006] 2. When the rotary drilling rig is working, when the hole depth is very large, more drill rod sections are required. Compared with the drill rod of the same model with fewer sections, the safety factor of each drill rod section is lower, and the safety factor of the core section is the lowest. At this time, the rotary drilling rig needs to be torque-limited and pressure-limited to prevent the drill rod from being damaged, but at the same time, the drilling efficiency is greatly reduced;

[0007] 3. When the rotary drilling rig is used for construction in a small-diameter hole, if the outer diameter of the drill rod of the customer's existing small-sized drilling rig is slightly larger than the hole diameter, the existing drilling rig will not be able to perform the construction, and it will be necessary to purchase a smaller-sized drilling rig or contract a smaller-sized drilling rig, which greatly increases the construction cost;

[0008] 4. When the rotary drilling rig is constructing in a small hole, when the gap between the drill rod and the pile hole wall is small, and the stratum is silt or mud layer, shrinkage phenomenon will occur during drilling. After the silt wraps around the drill rod, when the lifting force of the rotary drilling rig is not strong enough, the drill rod will not be able to be lifted out of the hole, which will cause great economic losses.

[0009] It can be seen that the drill rod of the above rotary drilling rig cannot meet the needs of various working conditions and work requirements. In order to meet the various working conditions and work requirements in reality, multiple rotary drilling rigs are usually required as backup, and the corresponding rotary drilling rigs are arranged to work when needed. Summary of the Invention

[0010] The purpose of the present invention is to provide a rotary drilling rig drill rod, a rotary drilling rig and a method for changing the number of sections of the rotary drilling rig drill rod which can meet various working conditions and various work requirements.

[0011] The present invention provides a drill rod of a rotary drilling rig, comprising a first drill rod section, a first core rod, a second core rod and an increasing / decreasing rod. The first drill rod section is telescopically sleeved with n-2 intermediate rods in sequence, where n is a positive integer greater than or equal to 2. The second core rod is telescopically sleeved in the increasing / decreasing rod. When n is greater than or equal to 3, the first core rod and the increasing / decreasing rod are selectively telescopically sleeved on the last intermediate rod of the n-2 intermediate rods. When n is equal to 2, the first core rod and the increasing / decreasing rod are selectively telescopically sleeved on the first drill rod section.

[0012] In one embodiment, the drill rod of the rotary drilling rig also includes a first water flow tray, a first buffer, a second water flow tray and a second buffer. The first water flow tray and the first buffer are arranged at one end of the first core rod for setting the drilling tool, and the second water flow tray and the second buffer are arranged at one end of the second core rod for setting the drilling tool; the diameter of the first water flow tray is basically the same as the diameter of the first section of the drill rod, and the diameter of the second water flow tray is basically the same as the diameter of the first section of the drill rod; the diameter of the second core rod is smaller than the diameter of the first core rod.

[0013] In one embodiment, the n-2 intermediate rods include a second drill rod section and a third drill rod section, the second drill rod section can be telescopically sleeved in the first drill rod section, the third drill rod section can be telescopically sleeved in the second drill rod section, and the last intermediate rod of the n-2 intermediate rods is the third drill rod section.

[0014] The present invention also provides a method for changing the number of sections of a drill rod of a rotary drilling rig, comprising:

[0015] A rotary drilling rig drill rod is provided, comprising a first drill rod section, a first core rod, and n-2 intermediate rods telescopically sleeved sequentially between the first drill rod section and the first core rod, where n is a positive integer greater than or equal to 2;

[0016] removing the first core rod from the bottom of the n-2 intermediate rods or the first drill rod;

[0017] Providing an increasing and decreasing rod, and installing the increasing and decreasing rod from the top of the first drill rod section so that the increasing and decreasing rod can be telescopically sleeved inside the n-2 intermediate rod sections or the first drill rod section;

[0018] A second core rod is provided, and the second core rod is installed on the increasing and decreasing rod from the bottom, so that the second core rod can be telescopically sleeved in the increasing and decreasing rod.

[0019] The present invention also provides another drill rod of a rotary drilling rig, comprising a first drill rod section, a second drill rod section, a first core rod, a second core rod and a driving device, wherein n-2 intermediate rods are telescopically sleeved on the second drill rod section in sequence, where n is a positive integer greater than or equal to 2. When n is greater than or equal to 3, the first core rod and the second core rod are selectively telescopically sleeved in the last intermediate rod of the n-2 intermediate rods. When n is equal to 2, the first core rod and the second core rod are selectively telescopically sleeved on the second drill rod section.

[0020] In one embodiment, the rotary drilling rig drill rod also includes a first water flow tray, a first buffer, a second water flow tray and a second buffer. The first water flow tray and the first buffer are arranged at one end of the first core rod for setting the drilling tool, and the second water flow tray and the second buffer are arranged at one end of the second core rod for setting the drilling tool; the diameter of the first water flow tray is basically the same as the diameter of the first section of the drill rod, and the diameter of the second water flow tray is basically the same as the diameter of the second section of the drill rod.

[0021] In one embodiment, the driving device includes a tube body, a driving inner key, a driving outer key and a fixing part. The driving inner key is arranged on the inner wall of the tube body, the driving outer key is arranged on the outer wall of the tube body, and the fixing part is arranged at the bottom of the tube body. When the second section of drill rod is connected to the driving device, the second section of drill rod is sleeved in the tube body of the driving device, and the outer diameter of the second section of drill rod matches the inner diameter of the driving inner key.

[0022] The present invention also provides a rotary drilling rig, comprising a power head and the above-mentioned rotary drilling rig drill rod, the power head comprising a main body, a power head inner key, a power head transmission shaft and a connecting shaft, the power head transmission shaft being arranged on the main body, the tube body of the driving device being sleeved in the power head transmission shaft, the power head inner key being arranged on the inner side wall of the power head transmission shaft, and the power head inner key cooperating with the drive outer key to transmit torque, and the connecting shaft fixedly connecting the drive device and the power head.

[0023] In one embodiment, a connecting hole is provided on the power head transmission shaft, and the connecting shaft is inserted into the connecting hole and the fixing hole on the fixing part of the driving device to fix the driving device and the power head together; the bottom of the key inside the power head contacts the top of the fixing part.

[0024] The present invention also provides another method for changing the number of sections of a drill rod of a rotary drilling rig, which is characterized by comprising:

[0025] A rotary drilling rig drill rod is provided, comprising a first drill rod section, a second drill rod section, a first core rod, and n-2 intermediate rods telescopically sleeved sequentially between the second drill rod section and the first core rod, where n is a positive integer greater than or equal to 2;

[0026] Dismantling the first section of drill pipe and removing the first core rod from the n-2 intermediate rods or the bottom of the first section of drill pipe;

[0027] Providing a second core rod, and installing the second core rod into the last section of the n-2 intermediate rods from the bottom, so that the second core rod can be telescopically sleeved in the last section of the n-2 intermediate rods;

[0028] A driving device is provided, the second section of drill pipe is connected to the driving device, and the driving device is used to be connected to a power head.

[0029] In one embodiment, the driving device includes a tube body, a driving inner key, a driving outer key and a fixing part. The driving inner key is arranged on the inner wall of the tube body, the driving outer key is arranged on the outer wall of the tube body, and the fixing part is arranged at the bottom of the tube body. When the second section of drill rod is connected to the driving device, the second section of drill rod is sleeved in the tube body of the driving device, and the outer diameter of the second section of drill rod matches the inner diameter of the driving inner key.

[0030] In the rotary drilling rig drill rod, rotary drilling rig and rotary drilling rig drill rod section changing method of the embodiments of the present invention, the number of sections of the rotary drilling rig drill rod can be changed to meet different working requirements and working conditions such as drilling holes of different depths and different hardness geology, greatly improving the adaptability of the rotary drilling rig drill rod, and eliminating the need to provide multiple drilling rigs with various different rules. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cross-sectional view of a drill rod of a rotary drilling rig.

[0032] Figure 2 for Figure 1 Schematic diagram of the cross section of the drill pipe of the rotary drilling rig shown.

[0033] Figure 3 The present invention is a structural schematic diagram of a rotary drilling rig with a drill rod having four sections.

[0034] Figure 4 for Figure 3 The diagram shows the structure of a rotary drilling rig with a five-section drill rod.

[0035] Figure 5(a) shows Figure 4 Schematic cross-section of .

[0036] Figure 5(b) shows Figure 3 The diagram shows the structure of the second water flow tray of the drill pipe of the rotary drilling rig.

[0037] Figure 5(c) shows Figure 3 The diagram shows the structure of the second buffer member of the drill rod of the rotary drilling rig.

[0038] Figure 6(a) to Figure 6(d) The present invention is a structural diagram of a method for changing the number of drill rod sections of a rotary drilling rig according to an embodiment of the present invention.

[0039] Figure 7 This is a structural schematic diagram of a rotary drilling rig drill rod with a four-section rod according to another embodiment of the present invention.

[0040] Figure 8 for Figure 7 The diagram shows the structure of a rotary drilling rig with a three-section drill rod.

[0041] Figure 9(a) shows Figure 7 A front view of the driving device of the drill rod of the rotary drilling rig is shown.

[0042] Figure 9(b) shows Figure 7 A sectional view of the driving device of the drill rod of the rotary drilling rig is shown.

[0043] Figure 9(c) shows Figure 7 A top view of the driving device of the drill rod of the rotary drilling rig is shown.

[0044] Figure 9(d) shows Figure 7 The diagram shows the structure of the fixing parts of the driving device of the drill rod of the rotary drilling rig.

[0045] Figure 10(a) to Figure 10(c) This is a structural schematic diagram of a method for changing the number of sections of a drill rod of a rotary drilling rig according to another embodiment of the present invention.

[0046] Figure 11 The figure is a structural schematic diagram of a rotary drilling rig according to an embodiment of the present invention.

[0047] Figure 12 for Figure 11 The diagram shows the coordinated structure of the power head and drive device of the rotary drilling rig.

[0048] Figure 13 for Figure 11 The diagram shows the structure of the power head and drill rod of the rotary drilling rig. DETAILED DESCRIPTION

[0049] In order to further illustrate the technical methods and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0050] like Figure 3 、 Figure 4 and Figure 5(a) to Figure 5(c) As shown, a rotary drilling rig drill pipe according to one embodiment of the present invention includes a first drill pipe section 21, a second drill pipe section 22, a third drill pipe section 23, a first core rod 24, a first water flow tray 25, and a first buffer 26. The second drill pipe section 22 is telescopically mounted within the first drill pipe section 21, and the third drill pipe section 23 is telescopically mounted within the second drill pipe section 22. The first, second, and third drill pipe sections 21, 22, and 23 each include a tubular body, an external key disposed on the outside of the tubular body, and an internal key disposed on the inside of the tubular body. The first core rod 24 includes a tubular body and an external key disposed on the outside of the tubular body. A retaining ring is provided at the bottom of the tubular body of each of the first, second, and third drill pipe sections 21, 22, and 23. The bottom of the tubular body is located near the end of the tubular body disposed on the first core rod 24 for mounting a drilling tool. The first water flow tray 25 and the first buffer 26 are disposed at the end of the first core rod 24 for mounting a drilling tool. The rotary drilling rig drill pipe also includes a fourth drill pipe section 28, a second core rod 29, a second water pan 30, and a second buffer 31. The second core rod 29 is telescopically mounted within the fourth drill pipe section 28. The second water pan 30 and the second buffer 31 are mounted on one end of the second core rod 29 for mounting the drilling tool. Either the first core rod 24 or the fourth drill pipe section 28 is telescopically mounted within the third drill pipe section 23.

[0051] The rotary drilling rig drill rod of this embodiment, by telescopically inserting either the first core rod 24 or the fourth drill rod section 28 within the third drill rod section 23, can be switched between four and five sections, achieving variable drill rod section count to meet different working requirements and working conditions, such as drilling holes of varying depths and geological hardnesses. This greatly improves the adaptability of the rotary drilling rig drill rod and eliminates the need for multiple drilling rigs with different specifications. Specifically, when the first core rod 24 is telescopically inserted within the third drill rod section 23, the larger diameter of the first core rod 24 provides a higher torsional and compressive safety factor, eliminating the need for torque and pressure limiting on the drilling rig, resulting in higher drilling efficiency and a longer service life for the drill rod. Furthermore, the four-section drill rod is lighter in weight, reducing the load on the drilling rig wire rope and the pressurized oil cylinder, thereby extending the service life of the wire rope. Furthermore, when the fourth drill rod section 28 is telescopically inserted within the third drill rod section 23, the drill rod can drill deeper.

[0052] In this embodiment, the rotary drilling rig drill pipe further includes a flange 33 and a third buffer 35. The flange 33 is fixedly connected to the first drill pipe section 21, and the third buffer 35 is connected to the flange 33. Specifically, the flange 33 can be fixedly connected to the first drill pipe section 21 by welding or the like.

[0053] In this embodiment, the diameter of the first water flow tray 25 is substantially the same as the diameter of the first section of drill rod 21 , and the diameter of the second water flow tray 30 is substantially the same as the diameter of the first section of drill rod 21 .

[0054] In this embodiment, the diameter of the second core rod 29 is smaller than the diameter of the first core rod 24 .

[0055] exist Figure 3 and Figure 4 In the embodiment, the rotary drilling rig can be configured with a four-section rod or a five-section rod. It is understood that other variations in the number of sections can also be implemented as needed, such as a three-section rod or a four-section rod, a three-section rod or a five-section rod, and so on. That is, in another embodiment, the rotary drilling rig drill rod includes a first drill rod section, a first core rod, a second core rod, and an increase / decrease rod. The first drill rod section is telescopically mounted with n-2 intermediate rods, where n is a positive integer greater than or equal to 2. The second core rod is telescopically mounted within the increase / decrease rod. When n is greater than or equal to 3, the first core rod and the increase / decrease rod are alternatively telescopically mounted on the last intermediate rod of the n-2 intermediate rods. When n is equal to 2, the first core rod and the increase / decrease rod are alternatively telescopically mounted on the first drill rod section. It is understood that the increase / decrease rod may include one, two, or more drill rod sections.

[0056] In this embodiment, the drill rod of the rotary drilling rig also includes a first water flow tray, a first buffer, a second water flow tray and a second buffer. The first water flow tray and the first buffer are arranged at one end of the first core rod for setting the drilling tool, and the second water flow tray and the second buffer are arranged at one end of the second core rod for setting the drilling tool.

[0057] In this embodiment, the rotary drilling rig drill pipe further includes a flange and a third buffer member, the flange is fixedly connected to the first drill pipe section, and the third buffer member is connected to the flange. Specifically, the flange can be fixedly connected to the first drill pipe section by welding or the like.

[0058] In this embodiment, the diameter of the first water flow tray is substantially the same as the diameter of the first section of the drill rod, and the diameter of the second water flow tray is substantially the same as the diameter of the first section of the drill rod.

[0059] In this embodiment, the diameter of the second core rod is smaller than the diameter of the first core rod.

[0060] The present invention also provides a method for changing the number of sections of a drill rod of a rotary drilling rig. The method for changing the number of sections of a drill rod of a rotary drilling rig in one embodiment includes the following steps:

[0061] S11, please refer to Figure 6(a), provide a rotary drilling rig drill rod, which includes a first drill rod section 41, a first core rod 44 and n-2 intermediate rods 47 that are telescopically sleeved between the first drill rod section 41 and the first core rod 44 in sequence, where n is a positive integer greater than or equal to 2. At this time, the number of sections of the rotary drilling rig drill rod is n. Specifically, the rotary drilling rig drill rod also includes a first water tray 45 and a first buffer 46 provided on the first core rod 44. The rotary drilling rig drill rod also includes a flange 53 and a third buffer 55, the flange 53 is fixedly connected to the first drill rod section 41, and the third buffer 55 is connected to the flange 53. Specifically, the flange 53 can be fixedly connected to the first drill rod section 41 by welding or the like.

[0062] S13, referring to Figure 6(b), remove the first core rod 44 from the bottom of the n-2 intermediate rod 47 or the first drill rod 41. Specifically, when n is greater than or equal to 3, the first core rod 44 is removed from the bottom of the n-2 intermediate rod 47. When n is 2, meaning there are no intermediate rods, the first core rod 44 is removed from the bottom of the first drill rod 41. Step S13 may also include removing the first water tray 45 and the first buffer 46 from the first core rod 44.

[0063] S15, referring to FIG6(c), provides an increasing / decreasing rod 48, and installs the increasing / decreasing rod 48 from the top of the first section of drill rod 41, so that the increasing / decreasing rod 48 is telescopically sleeved within the n-2 sections of intermediate rods 47 or the first section of drill rod 41. The number of sections of the increasing / decreasing rod 48 is m, where m is a positive integer greater than or equal to 1.

[0064] S17, see Figure 6(d). A second core rod 49 is provided and installed from the bottom onto the increasing / decreasing rod 48, allowing the second core rod 49 to be telescopically sheathed within the increasing / decreasing rod 48. At this point, the number of drill rod sections in the rotary drilling rig is n + m. Step S17 may also include providing a second water pan 50 and a second buffer 51, and installing them onto the second core rod 49.

[0065] In this embodiment, the diameter of the first water flow tray 45 is substantially the same as the diameter of the first section of drill rod 41 , and the diameter of the second water flow tray 50 is substantially the same as the diameter of the first section of drill rod 41 .

[0066] In this embodiment, the diameter of the second core rod 49 is smaller than the diameter of the first core rod 44 .

[0067] exist Figure 6(a) to Figure 6(d) In the embodiment shown, n=5, and the n-2 intermediate rods 47 include a second drill rod section and a third drill rod section. The second drill rod section can be telescopically sleeved in the first drill rod section 41, and the third drill rod section can be telescopically sleeved in the second drill rod section. The first core rod 44 or the addition and subtraction rod 48 can be telescopically sleeved in the third drill rod section.

[0068] The drill rod section changing method of the rotary drilling rig in this embodiment can switch the drill rod of the rotary drilling rig between n sections and n+m sections (m is a positive integer greater than or equal to 1), thereby changing the number of drill rod sections to meet different working requirements and working conditions such as drilling holes of different depths and different hardness geology, greatly improving the adaptability of the drill rod of the rotary drilling rig, and eliminating the need to provide multiple drilling rigs with various different rules.

[0069] like Figure 7 and Figure 8 As shown, the drill rod of a rotary drilling rig according to another embodiment of the present invention includes a first drill rod section 61, a second drill rod section 62, a third drill rod section 63, a first core rod 64, a first water flow tray 65 and a first buffer 66. The third drill rod section 63 is telescopically sleeved in the second drill rod section 62. The first drill rod section 61, the second drill rod section 62 and the third drill rod section 63 all include a tube body, an external key provided on the outside of the tube body and an internal key provided on the inside of the tube body. The first core rod 64 includes a tube body and an external key provided on the outside of the tube body. A limiting ring is provided at the bottom of the tube body of the first drill rod section 61, the second drill rod section 62 and the third drill rod section 63. The bottom of the tube body is the end of the tube body close to the first core rod 64 for setting the drilling tool. The first water flow tray 65 and the first buffer 66 are provided at one end of the first core rod 64 for setting the drilling tool. The drill rod of the rotary drilling rig also includes a second core rod 69, a second water flow tray 70, a second buffer 71 and a driving device 73 (see Figure 9(a) to Figure 9(d) ), a second water pan 70 and a second buffer 71 are provided on one end of the second core rod 69 for mounting the drilling tool. The second drill rod section 62 is sleeved within the first drill rod section 61 or connected to the drive device 73. The first core rod 64 or the second core rod 69 is selectively and telescopically sleeved within the third drill rod section 63.

[0070] The rotary drilling rig drill rod of this embodiment can be switched between a four-section rod and a three-section rod by removing or retaining the first drill rod section 61, thereby achieving variable drill rod section count to meet different working requirements and working conditions such as drilling holes of different depths and different geological hardnesses. This greatly improves the adaptability of the rotary drilling rig drill rod and eliminates the need for multiple drilling rigs with various specifications. Specifically, when the diameter of the hole to be drilled is smaller than the diameter of the first drill rod section, the original four-section drill rig cannot be used to drill the hole, requiring a smaller rotary drilling rig. In this embodiment, the first drill rod section can be removed for drilling, significantly reducing construction costs.

[0071] In this embodiment, the rotary drilling rig drill pipe further includes a flange 75 and a third buffer 77. The flange 75 is fixedly connected to the first drill pipe section 61, and the third buffer 77 is connected to the flange 75. Specifically, the flange 75 can be fixedly connected to the first drill pipe section 61 by welding or the like.

[0072] In this embodiment, the diameter of the first water flow tray 65 is substantially the same as the diameter of the first section of the drill rod 61 , and the diameter of the second water flow tray 70 is substantially the same as the diameter of the second section of the drill rod 62 .

[0073] In this embodiment, please refer to Figure 9(a) to Figure 9(d) The drive device 73 includes a tubular body 732, an inner drive key 734, an outer drive key 735, and a fixing member 737. The inner drive key 734 is located on the inner sidewall of the tubular body 732, the outer drive key 735 is located on the outer sidewall of the tubular body 732, and the fixing member 737 is located at the bottom of the tubular body 732. When the second drill pipe section 62 is connected to the drive device 73, the second drill pipe section 62 is sleeved within the tubular body 732 of the drive device 73, and the outer diameter of the second drill pipe section 62 matches the inner diameter of the inner drive key 734. The drive device 73 is used to connect to the power head.

[0074] Specifically, the tube body 732 is a cylindrical tube body. The driving inner key 734 extends along the axial direction of the tube body 732, and one end thereof extends to the bottom end of the tube body 732. The number of the driving inner keys 734 can be three. More specifically, the three driving inner keys 734 are evenly distributed on the inner wall of the tube body 732. The width of each driving inner key 734 corresponds to the width of the working slide of the second section of the drill pipe 62. The two driving outer keys 735 form a group to form a working slide of the drive device 73. In this embodiment, three groups of driving outer keys 735 are provided on the tube body 732, and the two driving outer keys 735 of each group are adjacent to one driving inner key 734. More specifically, the two driving outer keys 735 of each group are respectively close to the two ends of one driving inner key 734. The fixing member 737 is annular and is sleeved on the bottom of the tube body 732 . The fixing member 737 is provided with fixing holes 738 . More specifically, four fixing holes 738 are evenly distributed on the fixing member 737 along the circumferential direction.

[0075] In this embodiment, the driving device 73 further includes a reinforcement plate 739, which is provided at the top of the tube body 732 opposite to the bottom. Specifically, there are three reinforcement plates 739, which are preferably evenly distributed along the circumferential direction on the outer wall of the tube body 732.

[0076] exist Figure 7 and Figure 8In the embodiment, the rotary drilling rig can be configured with a four-section rod or a three-section rod. It is understood that other variations in the number of sections can also be implemented as needed, such as a five-section rod or a four-section rod, a four-section rod or a two-section rod, a three-section rod or a two-section rod, and so on. That is, in another embodiment, the rotary drilling rig drill rod includes a first drill rod section, a second drill rod section, a first core rod, a second core rod, and a drive device. The second drill rod section is telescopically sleeved with n-2 intermediate rods in sequence, where n is a positive integer greater than or equal to 2. When n is greater than or equal to 3, the first core rod and the second core rod are alternatively telescopically sleeved within the last intermediate rod of the n-2 intermediate rods. When n is equal to 2, the first core rod and the second core rod are alternatively telescopically sleeved on the second drill rod section. The second drill rod section is sleeved within the first drill rod section or connected to the drive device.

[0077] In this embodiment, the drill rod of the rotary drilling rig also includes a first water flow tray, a first buffer, a second water flow tray and a second buffer. The first water flow tray and the first buffer are arranged at one end of the first core rod for setting the drilling tool, and the second water flow tray and the second buffer are arranged at one end of the second core rod for setting the drilling tool.

[0078] In this embodiment, the rotary drilling rig drill pipe further includes a flange and a third buffer member, the flange is fixedly connected to the first drill pipe section, and the third buffer member is connected to the flange. Specifically, the flange can be fixedly connected to the first drill pipe section by welding or the like.

[0079] In this embodiment, the diameter of the first water flow tray is substantially the same as the diameter of the first section of the drill rod, and the diameter of the second water flow tray is substantially the same as the diameter of the second section of the drill rod.

[0080] In this embodiment, the structure of the driving device is the same as that of the driving device 73 in the above embodiment, and will not be described in detail here.

[0081] The present invention also provides a method for changing the number of sections of a drill rod of a rotary drilling rig. The method for changing the number of sections of a drill rod of a rotary drilling rig in one embodiment includes the following steps:

[0082] S33, please refer to Figure 10 (a), provide a rotary drilling rig drill rod, which includes a first drill rod section 61, a second drill rod section 62, a first core rod 64 and n-2 intermediate rods 67 telescopically arranged between the second drill rod section 62 and the first core rod 64 in sequence, where n is a positive integer greater than or equal to 2. At this time, the number of sections of the rotary drilling rig drill rod is n+1. Specifically, the rotary drilling rig drill rod also includes a first water tray 65 and a first buffer 66 provided on the first core rod 64. The rotary drilling rig drill rod also includes a flange 73 and a third buffer 75, the flange 73 is fixedly connected to the first drill rod section 61, and the third buffer 75 is connected to the flange 73. Specifically, the flange 73 can be fixedly connected to the first drill rod section 61 by welding or the like.

[0083] S33, referring to Figure 10(b), remove the first drill rod section 61 and remove the first core rod 64 from the n-2 intermediate rod section 67 or the bottom of the first drill rod section 61. Specifically, when n is greater than or equal to 3, the first core rod 64 is removed from the bottom of the n-2 intermediate rod section 67. When n is 2, meaning there are no intermediate rods, the first core rod 64 is removed from the bottom of the first drill rod section 61. Step S33 may also include removing the first water pan 65 and first buffer 66 from the first core rod 64.

[0084] S35, referring to Figure 10(c), provides a second core rod 69 and installs it from the bottom onto the last section of the n-2 intermediate rods 67, allowing the second core rod 69 to telescopically fit within the last section of the n-2 intermediate rods 67. At this point, the number of drill rod sections in the rotary drilling rig is n. Step S35 may also include providing a second water pan 70 and a second buffer 71, and installing them onto the second core rod 69.

[0085] S37. Provide a drive device 73 and connect the second drill pipe section 62 to the drive device 73. The drive device 73 is used to connect to the power head. Specifically, the drive device 73 includes a tubular body 732, an inner drive key 734, an outer drive key 735, and a fixing member 737. The inner drive key 734 is located on the inner sidewall of the tubular body 732, the outer drive key 735 is located on the outer sidewall of the tubular body 732, and the fixing member 737 is located at the bottom of the tubular body 732. When the second drill pipe section 62 is connected to the drive device 73, the second drill pipe section 62 is sleeved within the tubular body 732 of the drive device 73, and the outer diameter of the second drill pipe section 62 matches the inner diameter of the inner drive key 734. The drive device 73 is used to connect to the power head. Specifically, the tubular body 732 is cylindrical. The inner drive key 734 extends along the axis of the tubular body 732, with one end extending to the bottom end of the tubular body 732. The number of inner drive keys 734 can be three. More specifically, the three inner drive keys 734 are evenly distributed along the inner sidewall of the tubular body 732. The width of each inner drive key 734 corresponds to the width of the working slideway of the second drill pipe section 62. Two outer drive keys 735 form a group, forming a working slideway of the drive device 73. In this embodiment, the tubular body 732 is provided with three groups of outer drive keys 735, with each group of two outer drive keys 735 adjacent to a respective inner drive key 734. More specifically, each group of two outer drive keys 735 is located near each end of a respective inner drive key 734. The fixing member 737 is annular and is mounted on the bottom of the tubular body 732. The fixing member 737 is provided with fixing holes 738. More specifically, four fixing holes 738 are evenly distributed along the circumference of the fixing member 737. In this embodiment, the drive device 73 also includes a reinforcement plate 739, which is disposed on the top of the tubular body 732, opposite the bottom. Specifically, there are three reinforcement plates 739 , and the three reinforcement plates 739 are preferably evenly distributed along the circumferential direction on the outer side wall of the tube body 732 .

[0086] In this embodiment, the diameter of the first water flow tray is substantially the same as the diameter of the first section of the drill rod, and the diameter of the second water flow tray is substantially the same as the diameter of the second section of the drill rod.

[0087] exist Figure 10(a) to Figure 10(c) In the embodiment shown, n=3, n-2 intermediate rods 67 include a third drill rod section, which is telescopically sleeved in the second drill rod section 62, and the first core rod 64 or the second core rod 69 is telescopically sleeved in the third drill rod section.

[0088] The drill rod section changing method of the rotary drilling rig in this embodiment can switch the drill rod of the rotary drilling rig between n sections and n+1 sections, thereby changing the number of drill rod sections to meet different working requirements and working conditions such as drilling holes of different depths and different hardness geology, greatly improving the adaptability of the drill rod of the rotary drilling rig, and eliminating the need to provide multiple drilling rigs with various different rules.

[0089] The present invention also provides a rotary drilling rig, please refer to Figures 11 to 13 A rotary drilling rig according to one embodiment includes a power head 80 and the aforementioned rotary drilling rig drill rod with a drive device. The power head 80 includes a main body 81, a power head inner key 83, a power head drive shaft 84, and a connecting shaft 86. The power head drive shaft 84 is mounted on the main body 81. The tubular body 732 of the drive device 73 is sleeved within the power head drive shaft 84. The power head inner key 83 is mounted on the inner sidewall of the power head drive shaft 84 and cooperates with the drive outer key 735 to transmit torque. The connecting shaft 86 securely connects the drive device to the power head.

[0090] In this embodiment, a connecting hole is opened on the power head transmission shaft 84, and the connecting shaft 86 is inserted into the connecting hole and the fixing hole 738 on the fixing member 737 of the driving device 73 to fix the driving device 73 and the power head together.

[0091] In this embodiment, the bottom of the key 83 in the power head contacts the top of the fixing member 737. In this way, the connecting shaft 86 can be prevented from being damaged by the force when the pressure is transmitted.

[0092] In this embodiment, the outer periphery of the reinforcing plate 739 matches the inner periphery of the power head transmission shaft 84 to ensure the coaxiality of the driving device 73 and the power head.

[0093] In this embodiment, an outer wall of the power head transmission shaft 84 is further provided with an outer shaft 88 which is sleeved on the outer periphery of the power head transmission shaft 84. One end of the outer shaft 88 extends out of one end of the power head transmission shaft 84. The outer periphery of the fixing part 737 and the inner periphery of the outer shaft cooperate to further ensure the coaxiality of the driving device 73 and the power head.

[0094] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rotary drilling rig drill rod, characterized in that: The rotary drilling rig comprises a first section of drill rod, a first core rod, a second core rod and an increasing and decreasing rod. The first section of drill rod is telescopically sleeved with n-2 sections of intermediate rods in sequence, where n is a positive integer greater than or equal to 2. The second core rod is telescopically sleeved in the increasing and decreasing rod. When n is greater than or equal to 3, the first core rod and the increasing and decreasing rod are selectively telescopically sleeved on the last intermediate rod of the n-2 sections of intermediate rods. When n is equal to 2, the first core rod and the increasing and decreasing rod are selectively telescopically sleeved on the first section of drill rod. The rotary drilling rig drill rod also includes a flange. The flange is fixedly connected to the first section of drill rod, the first water flow tray and the first buffer are arranged at one end of the first core rod for setting the drilling tool, and the second water flow tray and the second buffer are arranged at one end of the second core rod for setting the drilling tool; the diameter of the first water flow tray is basically the same as the diameter of the first section of drill rod, and the diameter of the second water flow tray is basically the same as the diameter of the first section of drill rod; the diameter of the second core rod is smaller than the diameter of the first core rod.

2. The rotary drilling rig drill rod according to claim 1, characterized in that: The n-2 intermediate rods include a second drill rod and a third drill rod. The second drill rod is telescopically sleeved in the first drill rod, and the third drill rod is telescopically sleeved in the second drill rod. The last intermediate rod of the n-2 intermediate rods is the third drill rod.

3. A rotary drilling rig, characterized in that: The invention comprises the drill rod of the rotary drilling rig according to any one of claims 1 to 2.

4. A method for changing the number of sections of a rotary drilling rig drill rod, characterized in that: include: A rotary drilling rig drill rod is provided, comprising a first drill rod section (41), a first core rod (44), and n-2 intermediate rods (47) telescopically sleeved between the first drill rod section (41) and the first core rod (44), where n is a positive integer greater than or equal to 2; removing the first core rod (44) from the bottom of the n-2 intermediate rods (47) or the first drill rod (41); Providing an increasing and decreasing rod (48), and inserting the increasing and decreasing rod (48) from the top of the first section of drill rod (41), so that the increasing and decreasing rod (48) can be telescopically sleeved inside the n-2 section of intermediate rod (47) or the first section of drill rod (41); A second core rod (49) is provided, and the second core rod (49) is installed on the increasing and decreasing rod (48) from the bottom, so that the second core rod (49) can be telescopically sleeved in the increasing and decreasing rod (48), wherein the diameter of the second core rod is smaller than the diameter of the first core rod.

5. A rotary drilling rig drill rod, characterized in that: The invention comprises a first section of drill rod, a second section of drill rod, a first core rod, a second core rod and a driving device, wherein the driving device (73) is used to connect with a power head, the second section of drill rod can be sleeved in the first section of drill rod or connected to the driving device, the second section of drill rod is telescopically sleeved with n-2 sections of intermediate rods in sequence, n is a positive integer greater than or equal to 2, when n is greater than or equal to 3 and the second section of drill rod is sleeved in the first section of drill rod, the first core rod can be telescopically sleeved in the last intermediate rod of the n-2 sections of intermediate rods, when n is greater than or equal to 3 and the second section of drill rod is connected to the driving device, the second core rod can be telescopically sleeved in the last intermediate rod of the n-2 sections of intermediate rods; when n is equal to 2 and When the second section of drill rod is sleeved in the first section of drill rod, the first core rod can be telescopically sleeved on the second section of drill rod. When n is equal to 2 and the second section of drill rod is connected to the driving device, the second core rod can be telescopically sleeved on the second section of drill rod. The rotary drilling rig drill rod also includes a first water flow tray, a first buffer, a second water flow tray and a second buffer. The first water flow tray and the first buffer are arranged at one end of the first core rod for setting the drilling tool, and the second water flow tray and the second buffer are arranged at one end of the second core rod for setting the drilling tool. The diameter of the first water flow tray is basically the same as the diameter of the first section of drill rod, and the diameter of the second water flow tray is basically the same as the diameter of the second section of drill rod.

6. The rotary drilling rig drill rod according to claim 5, characterized in that: The driving device (73) comprises a tube body (732), a driving inner key (734), a driving outer key (735) and a fixing member (737). The driving inner key (734) is arranged on the inner side wall of the tube body (732), the driving outer key (735) is arranged on the outer side wall of the tube body (732), and the fixing member (737) is arranged at the bottom of the tube body (732). When the second section of drill rod (62) is connected to the driving device (73), the second section of drill rod (62) is sleeved in the tube body (732) of the driving device (73), and the outer diameter of the second section of drill rod (62) matches the inner diameter of the driving inner key (734).

7. A rotary drilling rig, characterized in that: The invention comprises a power head (80) and a drill rod of a rotary drilling rig according to claim 6, wherein the power head (80) comprises a main body (81), a power head inner key (83), a power head transmission shaft (84) and a connecting shaft (86), wherein the power head transmission shaft (84) is arranged on the main body (81), the tube body (732) of the drive device (73) is sleeved in the power head transmission shaft (84), the power head inner key (83) is arranged on the inner side wall of the power head transmission shaft (84), and the power head inner key (83) cooperates with the drive outer key (735) to transmit torque, and the connecting shaft (86) fixedly connects the drive device (73) and the power head.

8. The rotary drilling rig according to claim 7, characterized in that: A connecting hole is provided on the power head transmission shaft (84), and the connecting shaft (86) is inserted into the connecting hole and the fixing hole (738) on the fixing member (737) of the driving device (73) to fix the driving device (73) and the power head together; the bottom of the key (83) inside the power head contacts the top of the fixing member (737).

9. A method for changing the number of sections of a drill rod of a rotary drilling rig, characterized in that: include: A rotary drilling rig drill rod is provided, comprising a first drill rod section (61), a second drill rod section (62), a first core rod (64), and n-2 intermediate rods (67) telescopically sleeved between the second drill rod section (62) and the first core rod (64), where n is a positive integer greater than or equal to 2; The first section of drill rod (61) is dismantled, and the first core rod (64) is removed from the bottom of the n-2 section of intermediate rod (67) or the first section of drill rod (61); Providing a second core rod (69), and installing the second core rod (69) into the last section of the n-2 intermediate rods (47) from the bottom, so that the second core rod (69) is telescopically sleeved in the last section of the n-2 intermediate rods (47); A driving device (73) is provided, and the second section of drill rod (62) is connected to the driving device (73), and the driving device (73) is used to be connected to a power head.

10. The method for changing the number of sections of a drill rod of a rotary drilling rig according to claim 9, wherein: The driving device (73) comprises a tube body (732), a driving inner key (734), a driving outer key (735) and a fixing member (737). The driving inner key (734) is arranged on the inner side wall of the tube body (732), the driving outer key (735) is arranged on the outer side wall of the tube body (732), and the fixing member (737) is arranged at the bottom of the tube body (732). When the second section of drill rod (62) is connected to the driving device (73), the second section of drill rod (62) is sleeved in the tube body (732) of the driving device (73), and the outer diameter of the second section of drill rod (62) matches the inner diameter of the driving inner key (734).

Images