Power head, drilling machine for directional drilling and drilling machine for core exploration

Abstract

The utility model provides a power head and a drilling machine comprising the power head. Comprising a power head box body, a motor for providing power, a planetary gear train which is arranged on the power head box body and is used for carrying out first-stage speed reduction on the power output by the motor, and a duplicate gear which is arranged on the planetary gear train and is used for carrying out second-stage speed reduction on the power output by the motor, the large gear is arranged on the duplicate gear, is in meshing transmission with the duplicate gear and is used for carrying out third-stage speed reduction on power output by the motor; and the output shaft is arranged on the power head box body, is in meshing transmission with the large gear and is used for carrying out power output. According to the utility model, the original two motors of the power head are optimized into one motor, and the power head is controlled by the feeding oil cylinder to laterally move to avoid an orifice, so that the pulling force is increased to 620kN on the basis of ensuring the original propulsive force, and the drilling efficiency is greatly improved; meanwhile, switching of two working states of directional drilling and core exploration is completed by replacing individual parts of the power head.

Description

Technical Field

[0001] The utility model relates to the field of drilling, in particular to a power head and a drilling rig for directional drilling and a drilling rig for core exploration. Background Art

[0002] The power head is a crucial component of the drilling rig. During the drilling process, it withstands the reaction forces generated by the drill pipe during advancement and retraction, primarily used to push or pull the drill pipe out of the borehole. Its performance parameters have a crucial impact on the drilling efficiency and quality of the drilling rig. Power heads primarily come in two types: hydraulic and electric. A hydraulic head consists of a hydraulic motor, a reducer, and an output shaft. In underground coal mine composite directional drilling, the power head or rotary table and the downhole power drill simultaneously drive the drill bit. This composite drilling technique effectively alleviates drill string pressure, increases drilling speed, shortens well construction cycles, effectively controls wellbore inclination, and improves well construction quality. The essence of composite drilling is that the drill head drives the stator of the downhole screw motor through the drill string, eliminating the directional and deflecting effects of structural bends and allowing the drill path to extend forward along the existing trajectory, achieving precise control of the drilling trajectory while simultaneously achieving efficient drilling.

[0003] Existing directional drilling rigs generally use dual-motor or triple-motor power heads. Most of these power heads have problems such as oil leakage and easy gearbox damage. While the dual-motor system provides greater torque, it also means higher energy consumption, which will increase operating costs. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention provides a power head and a drilling rig for directional drilling and a drilling rig for core exploration. The power head includes a power head housing, and the power head further includes:

[0005] a motor for providing power;

[0006] A planetary gear train provided on the power head housing for performing a first-stage reduction in power output by the motor;

[0007] A double gear provided on the planetary gear train for performing a second stage of speed reduction for the power output by the motor;

[0008] A large gear provided on the duplex gear and meshing with the duplex gear for performing a third stage of speed reduction for the power output by the motor;

[0009] And an output shaft is provided on the power head housing for meshing with the large gear for power output.

[0010] On the basis of the above solution, the planetary gear train includes an inner ring gear, a sun gear and planetary gears arranged on the power head housing, wherein the inner ring gear is fixed on the power head housing.

[0011] Based on the above solution, it also includes: a motor support provided on the inner gear ring for mounting the motor.

[0012] On the basis of the above solution, it also includes: a side shift cylinder provided below the power head housing for side shifting to clear the orifice when the power head is unscrewing and removing the drill rod.

[0013] On the basis of the above solution, the planetary gear train further includes a planetary wheel carrier for directional drilling provided on the power head housing.

[0014] On the basis of the above solution, a pinion is provided on the planetary wheel carrier, and the pinion is engaged with the duplex gear to perform the second stage of reduction.

[0015] On the basis of the above solution, the planetary gear train further includes a gear shaft for core exploration provided on the power head housing, and the gear shaft is connected to the motor.

[0016] In addition, the utility model also provides a drilling rig for directional drilling, including a mast and a power head assembly on the mast, the power head assembly including a feeding mechanism arranged on the mast, a power head support seat arranged on the cylinder barrel of the feeding mechanism, and the power head arranged on the power head support seat.

[0017] On the basis of the above solution, the feeding mechanism includes a feeding cylinder for driving the power head support seat and the power head to move synchronously.

[0018] In addition, the utility model also provides a drilling rig for core exploration, including a mast and a power head assembly on the mast, the power head assembly including a feeding mechanism arranged on the mast, a power head support seat arranged on the cylinder barrel of the feeding mechanism, and the power head provided with a gear shaft arranged on the power head support seat.

[0019] The utility model optimizes the two motors of the power head in the existing technology into one motor, controls the lateral movement of the power head to clear the orifice through the feed cylinder, and redesigns the feed cylinder. On the basis of basically ensuring the original propulsion force, the pulling force is increased to 620kN, greatly improving the drilling efficiency. At the same time, the switching between the two working states of directional drilling and core exploration can be completed by replacing individual components of the power head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the power head in an embodiment of the present utility model (for directional drilling);

[0021] Figure 2 This is a schematic structural diagram (side view) of the power head in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the power head in an embodiment of the present utility model (for core exploration);

[0023] Figure 4 This is a structural diagram of a drilling rig in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic structural diagram of the feed cylinder in an embodiment of the utility model, wherein (a) and (b) respectively show different positions of the piston rod. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments described below are intended to facilitate understanding of the present invention and do not have any limiting effect on the present invention.

[0026] Example 1

[0027] like Figure 1 As shown, the utility model provides a power head, as a specific embodiment of the power head 1-3, including a power head box 1-3-10, and the power head 1-3 includes:

[0028] A motor 1-3-1 for providing power;

[0029] A planetary gear train provided on the power head housing 1-3-10 for performing a first-stage reduction in power output by the motor 1-3-1;

[0030] A double gear 1-3-6 is provided on the planetary gear train for performing a second stage of reduction in speed for the power output by the motor 1-3-1;

[0031] A large gear 1-3-7 is provided on the double gear 1-3-6 and meshes with the double gear 1-3-6 for performing a third stage reduction in power output by the motor 1-3-1;

[0032] And an output shaft 1-3-8 is provided on the power head housing 1-3-10 for meshing with the large gear 1-3-7 to output power.

[0033] During directional drilling, the planetary gear train includes an inner ring gear 1-3-4, planetary gears 1-3-9, a sun gear 1-3-3, and a planetary gear carrier 1-3-5. The planetary gear carrier 1-3-5 is provided with a pinion gear that meshes with the duplex gear 1-3-6 for second-stage reduction. Specifically, the inner ring gear 1-3-4 is fixed to the power head housing 1-3-10 and meshes with the planetary gears 1-3-9 without contacting the planetary gear carrier 1-3-5. The planetary gears 1-3-9 rotate around the planetary gear shaft and are fixed to the planetary gear carrier 1-3-5 by the planetary gear shaft. The sun gear 1-3-3 meshes with the planetary gears, and the planetary gears mesh with the inner ring gear. The power input from the motor is reduced by the planetary gear train and ultimately output by the planetary gear carrier. The teeth of the inner ring gear 1-3-4 mesh with the teeth of the planetary gears 1-3-9. The sun gear 1-3-3 is the central gear, which meshes with the planet gear 1-3-9; the planet gear 1-3-9 is a gear installed on the planet gear carrier 1-3-5. While the planet gear 1-3-9 meshes with the inner ring gear 1-3-4 for transmission, it also drives the planet gear carrier 1-3-5 to rotate around the central axis. The planet gear 1-3-9 usually meshes with the sun gear 1-3-3 and the inner ring gear 1-3-4 at the same time; the inner ring gear 1-3-4 is fixed, the planet gear carrier 1-3-5 serves as the output component, and the sun gear 1-3-3 serves as the input component.

[0034] like Figure 2 As shown, as a specific embodiment of the power head 1-3, it also includes: a power head housing 1-3-10, an output shaft 1-3-8 set on the power head housing 1-3-10, and a large gear 1-3-7 set on the output shaft 1-3-8 and meshing with the double gear 1-3-6 for third-stage reduction.

[0035] In order to facilitate the installation of the motor 1-3-1, it also includes: a motor support 1-3-2 for installing the motor 1-3-1, which is arranged on the inner ring gear 1-3-4.

[0036] like Figure 2 As shown, in order to enable the power head 1-3 to move sideways to clear the hole (the hole is the hole for drilling construction) when unscrewing the drill rod, so as to facilitate the removal or addition of the drill rod, it also includes: a side shift cylinder 1-3-11 arranged below the power head box 1-3-10.

[0037] During installation, the motor 1-3-1 is bolted to the motor support 1-3-2, and the motor support 1-3-2 is bolted to the inner ring 1-3-4. The inner ring 1-3-4, the planetary gear 1-3-9, the sun gear 1-3-3, and the planetary gear carrier 1-3-5 together constitute a planetary gear system. The motor output shaft 1-3-8 is engaged with the sun gear 1-3-3. The power output by the motor 1-3-1 is reduced in the first stage through the planetary gear system. The inner ring 1-3-4 is fixed to the power head housing 1-3-10. The planetary gear carrier 1-3-5 is provided with a small gear, which is engaged with the duplex gear 1-3-6 for the second stage of reduction. The duplex gear 1-3-6 is engaged with the large gear 1-3-7 for the third stage of reduction. The output shaft 1-3-8 is provided with an external spline, which is engaged with the internal spline of the large gear 1-3-7 to output power.

[0038] Example 2

[0039] like Figure 3 As shown, based on the device in Example 1, the present application provides another specific embodiment of a power head for core exploration.

[0040] Figure 1 The device in the embodiment can remove the sun gear 1-3-3, planetary gear 1-3-9, and inner ring gear 1-3-4, replace the planetary gear carrier 1-3-5 with the gear shaft 3, and directly connect the motor 1-3-1 to the gear shaft 3.

[0041] The switching between directional drilling and core exploration working states can be completed by replacing individual parts.

[0042] The other structures in this embodiment directly use the corresponding structures in Example 1 and will not be described in detail here.

[0043] Example 3

[0044] Based on the device in Example 1, the present application provides a specific implementation of a drilling rig for directional drilling.

[0045] like Figure 4 As shown, as a specific embodiment of the drilling rig, the drilling rig includes a mast and a power head assembly on the mast, and the power head assembly includes a feeding mechanism 1-1 set on the mast 2, a power head support seat 1-2 set on the cylinder barrel of the feeding mechanism 1-1, and a power head 1-3 in Example 1 set on the power head support seat 1-2.

[0046] Specifically, feed mechanism 1-1 comprises a feed cylinder and a feed mechanism connection seat mounted on the chassis assembly. When feed mechanism 1-1 is operating, the feed cylinder's barrel expands and contracts, driving the power head support seat 1-2 and power head 1-3 thereon to move synchronously. A detachable mast 2 is connected to feed mechanism 1-1. During surface drilling, installing this mast 2 improves the efficiency of raising and lowering drill rods, allowing multiple rods to be lifted simultaneously. During underground drilling, mast 1 can be removed from the drilling rig due to space limitations.

[0047] like Figure 5 As shown specifically, as a specific implementation of the feeding mechanism 1-1, a single-bar double-acting cylinder is selected.

[0048] In the prior art, for a 2*125 diameter double-rod double-acting cylinder, the thrust force is: F=2PA=2×32π / 4(1252-902)=370kN, where P is pressure and A is area.

[0049] As a specific embodiment of the single-rod double-acting cylinder, a 150 cylinder diameter single-rod double-acting cylinder has a propulsion force of: F=PA=35×π / 4(1502-1002)=350kN, where P is pressure and A is area.

[0050] Example 4

[0051] Based on the device in Example 2, the present application provides a specific implementation of a drilling rig for core exploration.

[0052] like Figure 4 As shown, as a specific embodiment of the drilling rig, the drilling rig includes a mast and a power head assembly on the mast, and the power head assembly includes a feeding mechanism 1-1 set on the mast 2, a power head support seat 1-2 set on the cylinder barrel of the feeding mechanism 1-1, and a power head 1-3 in Example 2 set on the power head support seat 1-2.

[0053] Remove the sun gear 1-3-3, planetary gear 1-3-9, and inner ring gear 1-3-4, replace the planetary gear carrier 1-3-5 with gear shaft 3, and directly connect the motor 1-3-1 to the gear shaft 3.

[0054] In summary, the above transmission route forms a three-stage reduction gearbox, which can optimize the original design of two motors into one motor while ensuring that the maximum output torque of 25,000 N·m remains unchanged.

[0055] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A power head, comprising a power head housing (1-3-10), characterized in that: The power head (1-3) also includes: A motor (1-3-1) for providing power; A planetary gear train provided on the power head housing (1-3-10) for performing a first-stage reduction in power output by the motor (1-3-1); A double gear (1-3-6) provided on the planetary gear train and used for performing a second-stage reduction in power output by the motor (1-3-1); A large gear (1-3-7) is provided on the double gear (1-3-6) and meshes with the double gear (1-3-6) for transmission and is used to perform a third stage of speed reduction on the power output by the motor (1-3-1); An output shaft (1-3-8) is provided on the power head housing (1-3-10) and is used for meshing with the large gear (1-3-7) to output power.

2. The power head according to claim 1, characterized in that: Also includes: A side shift oil cylinder (1-3-11) is arranged below the power head housing (1-3-10) and is used for side shifting to clear the hole when the power head (1-3) is unscrewing and removing the drill rod.

3. The power head according to claim 1, characterized in that: The planetary gear train comprises an inner ring gear (1-3-4), a sun gear (1-3-3) and planetary gears (1-3-9) arranged on the power head housing (1-3-10), wherein the inner ring gear (1-3-4) is fixed on the power head housing (1-3-10).

4. The power head according to claim 3, characterized in that: Also includes: A motor support (1-3-2) for mounting the motor (1-3-1) is provided on the inner gear ring (1-3-4).

5. The power head according to claim 3, characterized in that: The planetary gear train further comprises a planetary wheel carrier (1-3-5) for directional drilling, which is arranged on the power head housing (1-3-10).

6. The power head according to claim 5, characterized in that: A small gear is provided on the planetary wheel carrier (1-3-5), and the small gear is meshed with the double gear (1-3-6) to perform second-stage reduction.

7. The power head according to claim 1 or 2, characterized in that: The planetary gear train comprises a gear shaft (3) for core exploration arranged on the power head housing (1-3-10), and the gear shaft (3) is connected to the motor (1-3-1).

8. A drilling rig for directional drilling, comprising a mast (2) and a power head assembly (1) on the mast (2), characterized in that: The power head assembly comprises a feeding mechanism (1-1) arranged inside the mast (2), a power head support seat (1-2) arranged on the cylinder barrel of the feeding mechanism (1-1), and a power head (1-3) according to any one of claims 1 to 6 arranged on the power head support seat (1-2).

9. The directional drilling rig according to claim 8, characterized in that: The feeding mechanism (1-1) comprises a feeding oil cylinder for driving the power head support seat (1-2) and the power head (1-3) to move synchronously.

10. A drilling rig for core exploration, comprising a mast (2) and a power head assembly (1) on the mast (2), characterized in that: The power head assembly comprises a feeding mechanism (1-1) provided on the mast (2), a power head support seat (1-2) provided on the cylinder barrel of the feeding mechanism (1-1), and a power head (1-3) as claimed in claim 7 provided on the power head support seat (1-2).

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