Corrosion-resistant screw drill

Abstract

The utility model relates to the technical field of screw drilling tools, and provides a corrosion-resistant screw drilling tool which comprises a shell, a drill rod is rotatably connected to one end of the bottom of the shell, a drill bit is fixedly connected to the bottom of the drill rod, a driving mechanism used for driving the drill rod to rotate is arranged on the inner side of the shell, and a partition plate is fixedly connected to the top end of the inner side of the drill rod. The bottom of the partition plate is fixedly connected with a steel wire, the bottom of the steel wire is fixedly connected with a limiting block, the bottom end of the inner side of the drill rod is fixedly connected with a baffle ring, and the bottom wall of the baffle ring abuts against the limiting block. One end of the shell is provided with a water supply mechanism which is matched with starting of the driving mechanism to guide water in the water tank into the drill rod. The baffle ring at the bottom end of the inner side of the drill rod is limited by the limiting block connected with the steel wire and cannot be separated, so that the problem that the fishing work is increased due to the fact that the broken part of the drill rod falls into a well can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw drill tool technical field, specifically, and relates to a kind of corrosion-resistant screw drill tool. BACKGROUND

[0002] Screw drill tool is a kind of downhole power tool with drilling fluid as power, converts liquid pressure energy into mechanical energy, is widely used in petroleum, natural gas, geothermal energy and other energy exploration and development fields, and the core of screw drill tool is positive displacement motor, is composed of stator (rubber bushing) and rotor (spiral steel shaft), when high-pressure drilling fluid flows through motor, pressure difference is formed between stator and rotor, drives rotor to rotate around stator axis, and torque is transmitted to drill bit by universal shaft, and rock breaking drilling is realized.

[0003] Through the search, the "corrosion-resistant screw drill tool structure in Chinese patent publication No. CN218092946U is disclosed, including transmission equipment, the side of the transmission equipment is provided with universal shaft, the other end of the universal shaft is provided with stator, the other end of the stator is provided with screw rod, the inside of the stator is fixedly provided with bushing, the inner side wall of the bushing is rotatably provided with rotor, the side of the stator is provided with water inlet, the other side of the stator is provided with water outlet pipe, the inside of the stator is provided with cooling pipe, and the two ends of the cooling pipe are connected with water inlet and water outlet pipe.

[0004] However, in the implementation of the related technical process, the above-mentioned patent has certain technical defects: first, when the screw rod is broken under the condition of long-time use and long-time bearing of large alternating load, the broken screw rod will fall into the well, and the subsequent fishing work will be increased, so as to increase the subsequent workload, and the efficiency of drilling work is affected, in view of this, the utility model provides a kind of corrosion-resistant screw drill tool. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of corrosion-resistant screw drill tool, solves the problem that drilling rod is easy to fall after breaking and increase fishing workload.

[0006] The utility model discloses a technical scheme as follows: A kind of corrosion-resistant screw drill, including shell, the bottom of the shell one end rotationally connected with drill rod, the bottom fixedly connected with drill bit of drill rod, the inside of shell is provided with the drive mechanism for driving drill rod rotation, drill rod and drill bit are hollow structure, the top end fixedly connected with partition plate in the inside of drill rod, the bottom fixedly connected with steel wire of partition plate, the bottom fixedly connected with limit block of steel wire, the bottom end fixedly connected with baffle ring in the inside of drill rod, the bottom wall of baffle ring and limit block resist, the outside of partition plate is equipped with a plurality of water leakage holes, the bottom surface of drill bit is equipped with a plurality of water outlet holes, the top of shell is fixedly connected with water tank, one end of shell is provided with water supply mechanism by the cooperation of the starting of drive mechanism to guide the water in the inside of water tank into the inside of drill rod.

[0007] Preferably, the limit block is a fan-shaped structure, and the maximum diameter of the limit block is greater than the inner diameter of the baffle ring.

[0008] Preferably, the drill rod includes a high manganese steel layer, and the outer side of the high manganese steel layer is coated with a nickel-aluminum alloy coating.

[0009] Preferably, the drive mechanism includes a motor fixedly installed inside the shell, a rotating shaft rotatably connected to the bottom end of the inside of the shell, an output shaft of the motor fixedly connected to the rotating shaft, a gear one fixedly connected to the top end of the rotating shaft, and a gear two fixedly connected to the top end of the drill rod and engaged with the gear one.

[0010] Preferably, the gear ratio of the gear two to the gear one is 1:20.

[0011] Preferably, the water supply mechanism includes a cam fixedly connected to the output shaft of the motor, a connecting rod rotatably connected to the outer side of the cam, a connecting seat rotatably connected to one end of the connecting rod away from the cam, a push-pull rod fixedly connected to one end of the connecting seat, and a negative pressure piece provided at one end of the push-pull rod away from the connecting seat.

[0012] Preferably, the negative pressure piece includes a cylinder fixedly connected to the outside of the shell, a piston slidably connected to the inside of the cylinder, one end of the piston fixedly connected to the push-pull rod, a water inlet pipe fixedly connected to the inlet end of the cylinder, the inlet end of the water inlet pipe connected to the inside of the water tank, a water outlet pipe fixedly connected to the outlet end of the cylinder, and the outlet end of the water outlet pipe rotatably connected to the top of the drill rod and the water outlet pipe communicated with the inside of the drill rod.

[0013] Preferably, a water inlet check valve is fixedly connected to the water inlet pipe, and a water outlet check valve is fixedly connected to the water outlet pipe.

[0014] The working principle and beneficial effects of the utility model are as follows:

[0015] 1. The utility model discloses a kind of drilling tools, which is driven by driving mechanism to rotate drill pipe and drill bit to realize drilling work.When drill pipe is broken due to larger alternating load, the blocking ring at the bottom end of the inside of drill pipe is limited by the limiting block connected with steel wire and cannot be separated, so that single section or multiple section broken parts of drill pipe cannot fall off, which can avoid the problem of increasing fishing work caused by the falling of broken parts of drill pipe into the well.

[0016] 2. When the motor starts, the cam will rotate, causing the connecting rod to drive the connecting seat and the push-pull rod to reciprocate, which makes the piston reciprocate inside the cylinder, causing the pressure inside the cylinder to increase and decrease intermittently. When the pressure inside the cylinder decreases, the water inlet pipe will guide the cooling water inside the water tank into the cylinder. When the pressure inside the cylinder increases, the water outlet pipe will guide the water inside the cylinder into the drill pipe. This cycle allows the water outlet pipe to intermittently guide cooling into the drill pipe, which can cool the drill pipe and prevent the drill pipe from being affected by the high temperature caused by continuous friction, which can affect the material properties of the drill pipe. The cooling water is guided into the bottom end of the drill pipe through the water leakage hole and finally guided out through the water outlet hole at the bottom of the drill bit. This is beneficial to the heat dissipation of the drill pipe and the helical blade, which is beneficial to the work of the drill pipe and the helical blade. At the same time, when the cooling water is sprayed out through the water outlet hole of the drill bit, it can wash the soil or bedrock at the drill bit, thereby improving the drilling rate. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0018] Figure 1 Structure diagram of a corrosion-resistant screw drill of the utility model Figure 1 ;

[0019] Figure 2 Structure diagram of a corrosion-resistant screw drill of the utility model Figure 2 ;

[0020] Figure 3 Structure diagram of the inside of a drill pipe of the utility model

[0021] Figure 4 Structure diagram of an anti-disengagement piece of the utility model

[0022] Figure 5 Structure diagram of a drill pipe of the utility model

[0023] Figure 6 Structure diagram of a driving mechanism of the utility model

[0024] Figure 7 Structure diagram of a water supply mechanism of the utility model

[0025] Figure 8The utility model discloses a negative pressure piece's structural schematic view.

[0026] In the drawing: 1, shell; 2, drill rod; 201, high manganese steel layer; 202, nickel aluminum alloy coating; 21, partition plate; 22, water leakage hole; 23, anti -drop piece; 231, steel wire; 232, baffle ring; 233, limiting block; 3, drill bit; 31, water outlet hole; 4, driving mechanism; 41, motor; 42, rotating shaft; 43, gear one; 44, gear two; 5, water tank; 6, water supply mechanism; 61, cam; 62, connecting rod; 63, connecting seat; 64, push-pull rod; 65, negative pressure piece; 651, barrel; 652, piston; 653, water inlet pipe; 654, water inlet check valve; 655, water outlet pipe; 656, water outlet check valve. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are involved in the protection scope of the utility model.

[0028] As Figures 1-8 The utility model discloses a kind of corrosion-resistant screw drill, including shell 1, the bottom of shell 1 one end is rotatably connected with drill rod 2, the bottom of drill rod 2 is fixedly connected with drill bit 3, the inside of shell 1 is provided with the driving mechanism 4 for driving drill rod 2 rotation, drill rod 2 and drill bit 3 are hollow structure, the top of the inside of drill rod 2 is fixedly connected with partition plate 21, the bottom of partition plate 21 is fixedly connected with steel wire 231, the bottom of steel wire 231 is fixedly connected with limiting block 233, the bottom of the inside of drill rod 2 is fixedly connected with baffle ring 232, the bottom wall of baffle ring 232 and limiting block 233 are in contact, limiting block 233 is fan-shaped structure, and the maximum diameter of limiting block 233 is greater than the inner diameter of baffle ring 232, the outer edge of partition plate 21 is provided with a plurality of water leakage holes 22, the bottom of drill bit 3 is provided with a plurality of water outlet holes 31, the top of shell 1 is fixedly connected with water tank 5, one end of shell 1 is provided with water supply mechanism 6 by cooperation driving mechanism 4 is started to be guided into the water in drill rod 2 inside water tank 5.

[0029] By driving mechanism 4 drive drill rod 2 and drill bit 3 rotation realizes well drilling work, when drill rod 2 is subjected to larger alternating load and appears fracture, the baffle ring 232 of the bottom of the inside of drill rod 2 is limited by limiting block 233 connected with steel wire 231 and cannot separate, so that the single section or multiple section fracture of drill rod 2 cannot all fall, so it can avoid the problem that the fracture of drill rod 2 falls into well and increases fishing work.

[0030] Further, the drill pipe 2 comprises a high manganese steel layer 201, and the outer side of the high manganese steel layer 201 is coated with a nickel-aluminum alloy coating 202. The high manganese steel layer 201 has high wear resistance and toughness, and the nickel-aluminum alloy coating 202 has good high-temperature resistance, high strength and corrosion resistance, so that the wear resistance, high-temperature resistance and corrosion resistance of the drill pipe 2 can be greatly improved.

[0031] Further, the driving mechanism 4 comprises a motor 41 fixedly installed in the inside of the shell 1, the bottom end of the inside of the shell 1 is rotationally connected with a rotating shaft 42, the output shaft of the motor 41 is fixedly connected with the rotating shaft 42, the top end of the rotating shaft 42 is fixedly connected with a gear one 43, the top end of the drill pipe 2 is fixedly connected with a gear two 44 engaged with the gear one 43, and the gear ratio of the gear two 44 to the gear one 43 is 1:20. By starting the motor 41 to drive the rotating shaft 42 to rotate the gear one 43, the gear two 44 is synchronously rotated, so that the drill pipe 2 and the drill bit 3 are rotated to realize the drilling work.

[0032] Further, the water supply mechanism 6 comprises a cam 61 fixedly connected with the output shaft of the motor 41, the outer edge of the cam 61 is rotationally connected with a connecting rod 62, the end of the connecting rod 62 away from the cam 61 is rotationally connected with a connecting seat 63, one end of the connecting seat 63 is fixedly connected with a push-pull rod 64, the end of the push-pull rod 64 away from the connecting seat 63 is provided with a negative pressure piece 65, the negative pressure piece 65 comprises a cylinder body 651 fixedly connected with the outside of the shell 1, the inside of the cylinder body 651 is slidably connected with a piston 652, one end of the piston 652 is fixedly connected with the push-pull rod 64, the inlet end of the cylinder body 651 is fixedly connected with a water inlet pipe 653, the inlet end of the water inlet pipe 653 is connected with the inside of the water tank 5, the outlet end of the cylinder body 651 is fixedly connected with a water outlet pipe 655, the outlet end of the water outlet pipe 655 is rotationally connected with the top of the drill pipe 2 and the water outlet pipe 655 communicates with the inside of the drill pipe 2, the water inlet pipe 653 is fixedly connected with a water inlet check valve 654, and the water outlet pipe 655 is fixedly connected with a water outlet check valve 656.

[0033] Working principle: by starting the motor 41 to drive the rotating shaft 42 to rotate the gear one 43, the gear two 44 is synchronously rotated, so that the drill pipe 2 and the drill bit 3 are rotated to realize the drilling work;

[0034] When the motor 41 is started, the cam 61 rotates, and the connecting rod 62 drives the connecting seat 63 and the push-pull rod 64 to reciprocate, so that the piston 652 reciprocates in the cylinder 651, and the pressure in the cylinder 651 is intermittently increased and decreased. When the pressure in the cylinder 651 is reduced, the water inlet pipe 653 guides the cooling water in the water tank 5 into the cylinder 651. When the pressure in the cylinder 651 is increased, the water outlet pipe 655 guides the water in the cylinder 651 into the drill pipe 2. In this way, the water outlet pipe 655 can intermittently guide the cooling water into the drill pipe 2, so that the drill pipe 2 can be cooled, and the problem that the material performance of the drill pipe 2 is affected due to the continuous friction and high temperature of the drill pipe 2 is avoided.

[0035] The cooling water is guided into the bottom end of the drill pipe 2 through the water leakage hole 22, and is finally guided out through the water outlet hole 31 in the bottom of the drill bit 3. In this way, the heat dissipation of the drill pipe 2 and the spiral blade is facilitated, and the work of the drill pipe 2 and the spiral blade is facilitated. When the cooling water is sprayed out through the water outlet hole 31 in the drill bit 3, the soil or bedrock in the drill bit 3 is washed, and the drilling rate is improved.

[0036] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A corrosion-resistant screw drill, comprising a housing (1), wherein a drill rod (2) is rotatably connected to one end of the bottom of the housing (1), a drill bit (3) is fixedly connected to the bottom of the drill rod (2), and a drive mechanism (4) for driving the drill rod (2) to rotate is provided on the inner side of the housing (1), characterized in that, The drill rod (2) and the drill bit (3) are hollow structures, the inside of the drill rod (2) is fixedly connected with a partition plate (21) at the top end, the bottom of the partition plate (21) is fixedly connected with a steel wire (231), the bottom of the steel wire (231) is fixedly connected with a limiting block (233), the inside of the drill rod (2) is fixedly connected with a blocking ring (232) at the bottom end, the bottom wall of the blocking ring (232) is in contact with the limiting block (233), a plurality of water leakage holes (22) are formed in the outer edge of the partition plate (21), a plurality of water outlet holes (31) are formed in the bottom surface of the drill bit (3), the top of the shell (1) is fixedly connected with a water tank (5), one end of the shell (1) is provided with a water supply mechanism (6) which is started by the cooperation of the driving mechanism (4) to guide the water in the water tank (5) into the inside of the drill rod (2).

2. The corrosion resistant screw drill according to claim 1, characterized in that, The limiting block (233) is a fan-shaped structure, and the maximum diameter of the limiting block (233) is greater than the inner diameter of the blocking ring (232).

3. The corrosion resistant screw drill according to claim 1, characterized in that, The drill rod (2) comprises a high manganese steel layer (201), and the outside of the high manganese steel layer (201) is coated with a nickel-aluminum alloy coating (202).

4. The corrosion resistant screw drill according to claim 1, characterized in that, The driving mechanism (4) comprises a motor (41) fixedly installed in the inside of the shell (1), the bottom end of the inside of the shell (1) is rotatably connected with a rotating shaft (42), the output shaft of the motor (41) is fixedly connected with the rotating shaft (42), the top end of the rotating shaft (42) is fixedly connected with a gear one (43), and the top end of the drill rod (2) is fixedly connected with a gear two (44) engaged with the gear one (43).

5. The corrosion resistant screw-in auger according to claim 4, characterized in that The gear ratio of the gear two (44) to the gear one (43) is 1:

20.

6. The corrosion resistant screw-in auger of claim 4, wherein, The water supply mechanism (6) comprises a cam (61) fixedly connected with the output shaft of the motor (41), the outer edge of the cam (61) is rotatably connected with a connecting rod (62), the end of the connecting rod (62) away from the cam (61) is rotatably connected with a connecting seat (63), one end of the connecting seat (63) is fixedly connected with a push-pull rod (64), and the end of the push-pull rod (64) away from the connecting seat (63) is provided with a negative pressure piece (65).

7. The corrosion resistant screw conveyor as claimed in claim 6, wherein, The negative pressure piece (65) comprises a cylinder (651) fixedly connected with the outside of the shell (1), the inside of the cylinder (651) is slidably connected with a piston (652), one end of the piston (652) is fixedly connected with the push-pull rod (64), the inlet end of the cylinder (651) is fixedly connected with a water inlet pipe (653), the inlet end of the water inlet pipe (653) is connected with the inside of the water tank (5), the outlet end of the cylinder (651) is fixedly connected with a water outlet pipe (655), and the outlet end of the water outlet pipe (655) is rotatably connected with the top of the drill rod (2) and the water outlet pipe (655) is communicated with the inside of the drill rod (2).

8. The corrosion resistant screw-in auger according to claim 7, characterized in that A water inlet one-way valve (654) is fixedly connected with the water inlet pipe (653), and a water outlet one-way valve (656) is fixedly connected with the water outlet pipe (655).

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