Mechanical steering drilling device

Abstract

The mechanical guiding drilling device comprises a drill rod, a centering connecting assembly, a driving assembly and a drilling assembly, the centering connecting assembly comprises a hollow cover, clamping rods and a first connecting disc, the hollow cover is fixed at the front end of the drill rod, the first connecting disc is fixed at the end of the hollow cover away from the drill rod, the center line of the hollow cover and the axis of the first connecting disc are coincident with the axis of the drill rod, the outer side of the hollow cover is slidably connected with at least three circumferential arrays of clamping rods along the radial direction of the first connecting disc, the driving assembly is arranged on the hollow cover and can drive the at least three clamping rods to move synchronously along the radial direction of the first connecting disc to clamp the drilling assembly, so that the axis of the drilling assembly is coincident with the axis of the drill rod, the at least three clamping rods are driven by the driving pipe assembly to gather towards the center of the first connecting disc synchronously to clamp the mounting rod at the same time, so that the axis of the drill bit is coaxial with the axis of the drill rod, and repeated adjustment due to misalignment of the axis is not needed, so that the installation of the drill bit is more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling tools, in particular to a mechanical steering drilling device. BACKGROUND

[0002] Drilling is an important means of exploiting underground oil and gas resources to the ground. At present, in order to improve the comprehensive benefits of oil and gas field development and with the increasing number of high-difficulty horizontal wells and three-dimensional horizontal wells, the mechanical steering drilling tools used in the drilling process are used more and more frequently.

[0003] When the drilling equipment works in the mine for a long time, the drill bit is in contact with the rock wall for a long time, and heat is generated due to friction, which eventually causes the drill bit to wear seriously and needs to be replaced. During the replacement process, the drill bit needs to be lifted to align with the drill rod and fixed. In order to improve the replacement efficiency, for example, in the prior art, a set of adsorption pre-fixing mechanism composed of electromagnet and magnetic plate is designed, when replacing and installing the drill bit, the drill bit only needs to be lifted to the height of the drill rod and attached to it, at this time the electromagnet is powered on and the drill bit is pre-fixed on the mounting plate through the adsorption of the magnetic plate, then the worker can connect and fix the drill bit and the mounting plate through the bolt, after the fixing is completed, only the electromagnet needs to be powered off, which is convenient for the worker to operate and effectively improves the replacement efficiency of the drill bit. However, during the initial installation of the drill bit, there is no positioning of the alignment of the axis of the drill bit and the drill rod, which leads to the fact that the axis of the drill bit and the axis of the drill rod cannot be accurately aligned at one time, and after installation, the axis does not coincide, which needs to be adjusted again after power-off, and then powered on and adsorbed, which prolongs the installation time and affects the installation efficiency.

[0004] Therefore, there is an urgent need for a new mechanical steering drilling device to solve the above technical problems. SUMMARY

[0005] The present application aims to solve the above technical problems, that is, to solve the problem that during the initial fixing of the drill bit and the drill rod, there is no positioning of the alignment of the axis of the drill bit and the drill rod, which leads to the fact that the axis of the drill bit and the axis of the drill rod cannot be accurately aligned at one time, and after installation, the axis does not coincide, which needs to be adjusted repeatedly, prolonging the installation time and affecting the installation efficiency.

[0006] To achieve the above purpose, the present application provides a mechanical steering drilling device, comprising a drill pipe, a centering connecting assembly, a driving assembly and a drilling assembly, the drilling assembly is coaxially positioned and fixedly connected with the drill pipe through the centering connecting assembly, the centering connecting assembly comprises a hollow cover, clamping rods and a first connecting disc, the hollow cover is fixed at the front end of the drill pipe, the first connecting disc is fixed at the end of the hollow cover away from the drill pipe, the center line of the hollow cover and the axis of the first connecting disc are coincident with the axis of the drill pipe, at least three circumferential arrays of the clamping rods are slidingly connected to the outer side of the hollow cover along the radial direction of the first connecting disc, the driving assembly is arranged on the hollow cover and can drive the at least three clamping rods to move synchronously along the radial direction of the first connecting disc to clamp the drilling assembly, so that the axis of the drilling assembly is coincident with the axis of the drill pipe.

[0007] In the specific embodiment of the mechanical steering drilling device, the clamping rod is in U-shaped structure, two mutually parallel straight sections of the clamping rod are respectively located on both sides of the first connecting disc, one of the straight sections is inserted into the hollow cover and can move along the radial direction relative to the hollow cover, and the end of the other straight section is fixed with a positioning plate for clamping the drilling assembly.

[0008] In the specific embodiment of the mechanical steering drilling device, the cross section of the clamping rod is in rectangular shape.

[0009] In the specific embodiment of the mechanical steering drilling device, the driving assembly comprises an operating assembly, leadscrews arranged in the hollow cover, a driven bevel gear and a driving bevel gear, the number of the leadscrews is the same as that of the clamping rods and each leadscrew corresponds to one clamping rod, the leadscrew is rotationally connected in the hollow cover and is threadedly connected with the straight section of the clamping rod, the end of the leadscrew away from the clamping rod is fixed with the driven bevel gear, the driving bevel gear is rotationally connected in the hollow cover and is in mesh with the driven bevel gear, and the operating assembly is arranged to drive the driving bevel gear to rotate.

[0010] In the specific embodiment of the mechanical steering drilling device, the operating assembly comprises a rotating shaft, a knob and a worm and a worm gear in mesh with each other, the rotating shaft is rotationally connected in the hollow cover, and the axis of the rotating shaft is coincident with the axis of the drill pipe, the worm gear and the driving bevel gear are sleeved on the rotating shaft, the worm is rotationally connected with the hollow cover, one end of the worm extends to the outer side of the hollow cover and is fixedly connected with the knob, and the knob is arranged to be cooperated with external tools to drive the worm to rotate by driving rotation.

[0011] In the specific embodiment of the mechanical steering drilling device, an internal hexagonal groove is formed in the knob.

[0012] In the specific embodiment of the mechanical directional drilling device, the bottom end of the positioning plate is fixed with a rubber pad.

[0013] In the specific embodiment of the mechanical directional drilling device, a straight section of the clamping rod in the hollow cover is fixed with an anti-disengagement disc to prevent disengagement from the hollow cover.

[0014] In the specific embodiment of the mechanical directional drilling device, a number of bearings same as the number and arrangement of the lead screws are fixed on the first connecting disc in the hollow cover, and one end of the lead screw penetrates through the bearing and is rotationally connected thereto.

[0015] In the specific embodiment of the mechanical directional drilling device, the drilling assembly comprises a mounting rod and a drill bit, one end of the mounting rod is fixed with a second connecting disc, the other end of the mounting rod is fixed with the drill bit, and the second connecting disc is connected and fixed with the first connecting disc by bolts and nuts.

[0016] Compared with the prior art, the mechanical directional drilling device has the following beneficial effects:

[0017] The centering connecting assembly is designed to drive at least three clamping rods to gather towards the center of the first connecting disc synchronously by the driving pipe assembly, and the at least three clamping rods can simultaneously clamp the drill bit when the drill bit is preliminarily installed, so that the axis of the drill bit is coaxial with the axis of the drill pipe, the function of positioning the drill bit only once during the preliminary installation is realized, repeated adjustment due to misalignment of the axes is not needed, the installation of the drill bit is more convenient, and the installation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0019] Figure 1 is the overall perspective view of the mechanical directional drilling device provided by the present application;

[0020] Figure 2 is the front view of Figure 1 ;

[0021] Figure 3 is the perspective view of the drilling assembly in Figure 1 ;

[0022] Figure 4 is the perspective view of the centering connecting assembly;

[0023] Figure 5 is the left side sectional view of the hollow cover in Figure 1 ;

[0024] Figure 6 is the sectional view of the centering connecting assembly and the driving assembly in cooperation. Figure 1 ​

[0025] List of reference signs:

[0026] 1. drill rod; 2. drilling assembly; 21. mounting rod; 22. drill bit; 23. second connecting disc; 3. centering connecting assembly; 31. hollow cover; 32. first connecting disc; 33. clamping rod; 34. positioning plate; 4. driving assembly; 41. driven bevel gear; 42. support; 43. screw rod; 44. driving bevel gear; 45. operating assembly; 451. worm; 452. knob; 453. worm wheel; 454. rotating shaft. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the positions or location relations indicated by the terms "upper", "lower", "inner", "outer" and the like are based on the positions or location relations shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the systems or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are used to distinguish parts, and are only for the convenience of distinguishing the above-mentioned parts, and have no special meaning unless otherwise stated. The above-mentioned terms cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0030] The present application relates to the technical field of drilling tools, in particular to a mechanical steering drilling device. The purpose is to solve the problem that in the process of preliminary fixing of the existing drill bit and drill pipe, due to the lack of positioning of the alignment of the drill bit and the drill pipe axis, the axis of the drill bit and the axis of the drill pipe cannot be aligned at one time, and after installation, the axis does not coincide, so the position needs to be adjusted repeatedly, which prolongs the installation time and affects the installation efficiency. For this purpose, the mechanical steering drilling device provided by the present application comprises a drill pipe, a centering connecting assembly, a driving assembly and a drilling assembly, the drilling assembly is coaxially positioned and fixedly connected with the drill pipe through the centering connecting assembly, the centering connecting assembly comprises a hollow cover, a clamping rod and a first connecting disc, the hollow cover is fixed at the front end of the drill pipe, the first connecting disc is fixed at the end of the hollow cover away from the drill pipe, the center line of the hollow cover and the axis of the first connecting disc are coincident with the axis of the drill pipe, at least three circumferentially arrayed clamping rods are slidingly connected to the outer side of the hollow cover along the radial direction of the first connecting disc, the driving assembly is arranged on the hollow cover and can drive the at least three clamping rods to move synchronously along the radial direction of the first connecting disc to clamp the drilling assembly, so that the axis of the drilling assembly coincides with the axis of the drill pipe, the present application drives the at least three clamping rods to gather towards the center of the first connecting disc through the driving pipe assembly, when the drill bit is preliminarily installed, the at least three clamping rods can clamp the drill bit at the same time, so that the axis of the drill bit is coaxial with the axis of the drill pipe, the function of positioning the drill bit only once during preliminary installation is realized, repeated adjustment due to axis misalignment is not required, the installation of the drill bit is more convenient, and the installation efficiency is improved.

[0031] Next, the mechanical steering drilling device provided by the embodiment of the present application will be described in detail in combination with the drawings.

[0032] Referring to Figures 1-4 , the present application provides a mechanical steering drilling device, which comprises a drill pipe 1, a centering connecting assembly 3, a driving assembly 4 and a drilling assembly 2, the drilling assembly 2 is coaxially positioned and fixedly connected with the drill pipe 1 through the centering connecting assembly 3, the centering connecting assembly 3 comprises a hollow cover 31, a clamping rod 33 and a first connecting disc 32, the hollow cover 31 is fixed at the front end of the drill pipe 1, the first connecting disc 32 is fixed at the end of the hollow cover 31 away from the drill pipe 1, the center line of the hollow cover 31 and the axis of the first connecting disc 32 are coincident with the axis of the drill pipe 1, at least three circumferentially arrayed clamping rods 33 are slidingly connected to the outer side of the hollow cover 31 along the radial direction of the first connecting disc 32, the driving assembly 4 is arranged on the hollow cover 31 and can drive the at least three clamping rods 33 to move synchronously along the radial direction of the first connecting disc 32 to clamp the drilling assembly 2, so that the axis of the drilling assembly 2 coincides with the axis of the drill pipe 1.

[0033] Specifically, referring to Figures 1-3The drilling assembly 2 comprises a mounting rod 21 and a drill bit 22, one end of the mounting rod 21 is fixed with a second connecting disc 23, the other end of the mounting rod 21 is fixed with the drill bit 22, the axis of the mounting rod 21 coincides with the axis of the drill bit 22, and the second connecting disc 23 is connected and fixed with the first connecting disc 32 through bolts and nuts. A plurality of bolt holes are arranged in a circumferential array on the first connecting disc 32 and the second connecting disc 23, the bolts pass through the bolt holes and are threadedly connected with the nuts to achieve the fixed connection of the drill bit 22 and the drill rod 1.

[0034] In one embodiment, a rubber pad is fixed at the bottom end of the positioning plate 34 to improve the clamping stability of the positioning plate 34 to the drilling assembly 2.

[0035] In one embodiment, referring to Figures 1-2 The clamping rod 33 is in a U-shaped structure, two parallel straight sections of the clamping rod 33 are respectively located on the two sides of the first connecting disc 32, one of the straight sections is inserted into the hollow cover 31 and can move along the radial direction relative to the hollow cover 31, and the other straight section is fixed with the positioning plate 34 at the end portion for clamping the drilling assembly 2. Specifically, the cross section of the clamping rod 33 is rectangular in shape, which can prevent the clamping rod 33 from rotating relative to the hollow cover 31, so that the clamping rod 33 can only move up and down. The straight section of the clamping rod 33 in the hollow cover 31 is fixed with an anti-disengagement disc to prevent disengagement from the hollow cover 31.

[0036] In the above embodiment, the clamping rod 33 is designed in a U-shaped structure, so that the clamping rod 33 crosses the first connecting disc 32 for clamping the drill bit 22 while not affecting the fixation of the first connecting disc 32 and the second connecting disc 23.

[0037] In one embodiment, referring to Figures 5-6 The driving assembly 4 comprises an operating assembly 45, a lead screw 43 arranged in the hollow cover 31, a driven bevel gear 41 and a driving bevel gear 44, the number of the lead screws 43 is the same as that of the clamping rods 33 and corresponds one-to-one, the lead screw 43 is rotationally connected in the hollow cover 31 and is threadedly connected with the straight section of the clamping rod 33, the lead screw 43 is fixed with the driven bevel gear 41 at the end away from the clamping rod 33, the driving bevel gear 44 is rotationally connected in the hollow cover 31 and is engaged with the driven bevel gear 41, and the operating assembly 45 is arranged to drive the driving bevel gear 44 to rotate.

[0038] Specifically, the straight section of the clamping rod 33 in the hollow cover 31 is provided with a threaded hole, and one end of the screw rod 43 is screwed into the threaded hole. The operating assembly 45 drives the screw rod 43 to rotate. Since the clamping rod 33 is screwed with the screw rod, and the screw rod 43 cannot rotate relative to the hollow cover 31, the rotation of the screw rod 43 is converted into the linear motion of the clamping rod 33, thereby realizing the function of bringing the clamping rod 33 to the center of the first connecting disc 32 by rotating the screw rod 43, and further realizing the function of clamping the mounting rod 21 in the drilling assembly 2 while making the drill bit 22 coincide with the axis of the drill rod 1. In the preliminary installation, only one installation is required, and repeated installation due to the adjustment of the misaligned axis is not required, thereby improving the installation efficiency.

[0039] More specifically, the first connecting disc 32 in the hollow cover 31 is fixed with a support 42 which has the same number and arrangement as the screw rod 43. One end of the screw rod 43 penetrates the support 42 and is rotationally connected therewith.

[0040] In one embodiment, referring to Figures 5-6 The operating assembly 45 includes a rotating shaft 454, a knob 452, and a worm 451 and a worm gear 453 which are meshed with each other. The rotating shaft 454 is rotationally connected in the hollow cover 31, and the axis of the rotating shaft 454 coincides with the axis of the drill rod 1. The worm gear 453 and the driving bevel gear 44 are sleeved on the rotating shaft 454. The worm 451 is rotationally connected with the hollow cover 31 and one end thereof extends to the outside of the hollow cover 31 and is fixedly connected with the knob 452. The knob 452 is arranged to be able to cooperate with external tools to drive the worm 451 to rotate by rotation. The screw rod 43 surrounds the outside of the rotating shaft 454, and the rotating shaft 454 is rotationally connected with the first connecting disc 32 and the inner wall of the hollow cover 31.

[0041] In one embodiment, the knob 452 is provided with an internal hexagonal groove, and the knob 452 can be twisted by inserting a tool into the internal hexagonal groove to rotate the worm 451.

[0042] The working principle of the present application is as follows: when installing the drill bit 22, the worker contacts and fits the mounting rod 21 with the first connecting disc 32, and then drives the knob 452 exposed outside the hollow cover 31 to rotate by a tool, so that the worm 451 drives the worm gear 453 to rotate the rotating shaft 454, which drives the driving bevel gear 44 to rotate, thereby driving the driven bevel gear 41 to rotate the screw rod 43. During the rotation of the screw rod 43, the clamping rod 33 is gathered to the central part of the first connecting disc 32, and then at least three screw rods 43 simultaneously clamp the mounting rod 21 to realize the preliminary installation. Then the first connecting disc 32 and the second connecting disc 23 are fixed by bolts and nuts. In the preliminary installation process, the position of the drill bit 22 does not need to be repeatedly adjusted, which makes the installation more convenient and improves the installation efficiency.

[0043] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A mechanical steering drilling device, characterized in that, The drilling rod, the centering connecting assembly, the driving assembly and the drilling assembly are coaxially positioned and fixedly connected through the centering connecting assembly, the centering connecting assembly comprises a hollow cover, a clamping rod and a first connecting disc, the hollow cover is fixed at the front end of the drilling rod, the first connecting disc is fixed at the end of the hollow cover away from the drilling rod, the center line of the hollow cover and the axis of the first connecting disc are coincident with the axis of the drilling rod, the outer side of the hollow cover is slidably connected with at least three circumferential arrays of the clamping rod along the radial direction of the first connecting disc, the driving assembly is arranged on the hollow cover and can drive the at least three clamping rods to move synchronously along the radial direction of the first connecting disc to clamp the drilling assembly, so that the axis of the drilling assembly is coincident with the axis of the drilling rod; the clamping rod is in U-shaped structure, two mutually parallel straight sections of the clamping rod are located on the two sides of the first connecting disc respectively, one of the straight sections is inserted into the hollow cover and can move along the radial direction relative to the hollow cover, and the end of the other straight section is fixed with a positioning plate for clamping the drilling assembly; the driving assembly comprises an operating assembly, a lead screw arranged in the hollow cover, a driven bevel gear and a driving bevel gear, the number of the lead screws is same as that of the clamping rods and the lead screws are one-to-one corresponding, the lead screws are rotationally connected in the hollow cover and are threadedly connected with the straight section of the clamping rod, the end of the lead screw away from the clamping rod is fixed with the driven bevel gear, the driving bevel gear is rotationally connected in the hollow cover and is in mesh with the driven bevel gear, and the operating assembly is arranged to drive the driving bevel gear to rotate; the operating assembly comprises a rotating shaft, a knob and a worm and a worm wheel in mesh with each other, the rotating shaft is rotationally connected in the hollow cover, and the axis of the rotating shaft is coincident with the axis of the drilling rod, the worm wheel and the driving bevel gear are sleeved on the rotating shaft, the worm is rotationally connected with the hollow cover, one end of the worm extends to the outside of the hollow cover and is fixedly connected with the knob, and the knob is arranged to be cooperated with external tools to drive the worm to rotate through driving rotation.

2. The mechanical steering drilling device according to claim 1, characterized in that, The cross section of the clamping rod is rectangular.

3. The mechanical steering drilling device according to claim 1, characterized in that, An internal hexagonal groove is formed in the knob.

4. The mechanical steering drilling device according to claim 1, characterized in that, A rubber pad is fixed at the bottom end of the positioning plate.

5. The mechanical steering drilling device according to claim 1, characterized in that, A separation-preventing disc is fixed on the straight section of the clamping rod in the hollow cover to prevent the clamping rod from separating from the hollow cover.

6. The mechanical steering drilling device according to claim 1, characterized in that, A support same in number and arrangement as the lead screws is fixed on the first connecting disc in the hollow cover, and one end of the lead screw penetrates through the support and is rotationally connected with the support.

7. The mechanical steering drilling device according to claim 1, characterized in that, The drilling assembly comprises a mounting rod and a drill bit, one end of the mounting rod is fixed with a second connecting disc, the other end of the mounting rod is fixed with the drill bit, and the second connecting disc is connected and fixed with the first connecting disc through bolts and nuts.

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