Anti-falling rotary percussion screw drill

Abstract

The utility model discloses an anti-falling rotary percussion screw drill which comprises a bypass valve assembly, an anti-falling assembly, a motor assembly, a cardan shaft assembly, a transmission shaft assembly, an anti-falling piece and a rubber sealing cover, the anti-falling assembly is arranged at the bottom of the bypass valve assembly, the motor assembly is arranged at the bottom of the anti-falling assembly, and the cardan shaft assembly is arranged at the bottom of the transmission shaft assembly. The universal shaft assembly is arranged at the bottom of the motor assembly, the transmission shaft assembly is arranged at the bottom of the universal shaft assembly, a transmission shaft body is arranged in the transmission shaft assembly, a threaded screw hole is formed in the outer side of the transmission shaft assembly, and the anti-falling piece comprises a stud in threaded connection with the threaded screw hole and an anti-falling plate rotationally connected with the stud. And the rubber sealing cover is in threaded connection in the threaded screw hole. According to the anti-falling transmission shaft assembly, the anti-falling effect of the transmission shaft assembly is achieved under the condition that work of a drilling tool is not affected, the anti-falling transmission shaft assembly is detachable, the anti-falling transmission shaft assembly is convenient to replace, meanwhile, the anti-falling transmission shaft assembly can be sealed through the rubber sealing cover, and external water is prevented from entering the anti-falling transmission shaft assembly to corrode the anti-falling transmission shaft assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of screw drill tools, in particular to an anti-dropping and anti-spinning screw drill tool. Background Art

[0002] The working principle of screw drill is essentially to convert liquid pressure energy into mechanical energy to achieve downhole power drive. Compared with the traditional turntable drive method, screw drill has the advantages of reducing drill wear, improving drilling efficiency, and accurate orientation, so it has been widely used in the drilling field. When in use, the drive shaft assembly is connected to the drill bit through the drive joint, and the top is fixed to the universal shaft assembly. When the drive shaft assembly is severely damaged or worn, it is easy to fall into the well with the drill bit, which greatly affects the use. There are certain shortcomings. For this reason, we propose an anti-drop rotation screw drill. Utility Model Content

[0003] The utility model aims to solve the problems existing in the prior art or related technologies.

[0004] To this end, the technical solution adopted by the utility model is: an anti-drop rotary impact screw drill, including a bypass valve assembly, an anti-drop assembly, a motor assembly, a universal shaft assembly, a drive shaft assembly, an anti-drop part and a rubber sealing cover, the anti-drop assembly is arranged at the bottom of the bypass valve assembly, the motor assembly is arranged at the bottom of the anti-drop assembly, the universal shaft assembly is arranged at the bottom of the motor assembly, a threaded hole is opened on the outside of the universal shaft assembly, the drive shaft assembly is arranged at the bottom of the universal shaft assembly, a drive shaft body is arranged inside the drive shaft assembly, a limiting groove is arranged on the outside of the drive shaft body, the anti-drop part includes a stud threadedly connected to the threaded hole and an anti-drop plate rotatably connected to the stud, and the rubber sealing cover is threadedly connected in the threaded hole.

[0005] Preferably, the anti-drop assembly includes an anti-drop shell arranged at the bottom of the bypass valve assembly, a rubber pad bonded to the inner side of the anti-drop shell, an anti-drop rod arranged at the top of the motor assembly and a locking nut threadedly connected to the top of the anti-drop rod.

[0006] Preferably, the anti-drop assembly further includes a stopper disposed outside the anti-drop rod and a stopper ring inserted through the anti-drop rod.

[0007] Preferably, the limiting groove is annular.

[0008] Preferably, the two studs are T-shaped, and hexagonal grooves are formed on the two studs.

[0009] Preferably, each of the rubber sealing covers is provided with a handle, and the two rubber sealing covers correspond to the threaded holes one by one.

[0010] By adopting the above technical scheme, the beneficial effects achieved by the utility model are as follows: the utility model realizes the anti-drop effect of the transmission shaft assembly without affecting the operation of the drilling tool by arranging the anti-drop part, and the anti-drop part is detachable so as to replace the anti-drop part. At the same time, the anti-drop part can be sealed by arranging the rubber sealing cover to prevent external water from entering the internal part and corroding the anti-drop part. When in use, the stud of the rotatable anti-drop part is used, and the rotating stud can drive the anti-drop plate to move horizontally until the anti-drop plate is in the limiting groove of the transmission shaft body. When the transmission shaft assembly falls, the anti-drop plate and the universal shaft assembly can be prevented from being separated due to the clamping connection between the anti-drop plate and the limiting groove, so as to facilitate use. Then the anti-drop plate can be rotatably separated from the stud, and the anti-drop part can be removed after separation for replacement. At the same time, the rotatable rubber sealing cover is threadedly connected to the threaded hole, and the anti-drop part can be sealed after connection to prevent external water from entering the internal part and corroding the anti-drop part. Subsequently, the sealing effect can be improved by the rubber pad, which facilitates the locking nut to block the well fluid. At the same time, the blocking effect can be reinforced by the retaining ring for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the anti-drop assembly, bypass valve assembly and motor assembly of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the universal shaft assembly and the transmission shaft assembly of the utility model;

[0014] Figure 4 For this utility model Figure 3 Structural diagram of the anti-dropping part;

[0015] Figure 5 For this utility model Figure 3 Schematic diagram of the structure of the rubber sealing cover.

[0016] Reference numerals:

[0017] 100. Bypass valve assembly;

[0018] 200, anti-drop assembly; 201, anti-drop shell; 202, rubber pad; 203, anti-drop rod; 204, stopper; 205, stopper ring; 206, locking nut;

[0019] 300, motor assembly;

[0020] 400, universal shaft assembly; 401, threaded hole;

[0021] 500, transmission shaft assembly; 501, transmission shaft body; 5011, limiting groove;

[0022] 600, anti-drop parts; 601, studs; 602, anti-drop plates;

[0023] 700. Rubber sealing cover; 701. Handle. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0025] The following describes some embodiments of the utility model in conjunction with the accompanying drawings to provide an anti-dropping and rotating screw drilling tool.

[0026] Embodiment 1:

[0027] Reference Figure 1-5 , which is the first embodiment of the utility model, and this embodiment provides an anti-drop rotary screw drilling tool, including a bypass valve assembly 100, an anti-drop assembly 200, a motor assembly 300, a universal shaft assembly 400, a transmission shaft assembly 500, an anti-drop part 600 and a rubber sealing cover 700.

[0028] Specifically, the anti-drop assembly 200 is arranged at the bottom of the bypass valve assembly 100, and the anti-drop assembly 200 includes an anti-drop shell 201 arranged at the bottom of the bypass valve assembly 100, a rubber pad 202 bonded to the inner side of the anti-drop shell 201, an anti-drop rod 203 arranged at the top of the motor assembly 300, and a locking nut 206 threadedly connected to the top of the anti-drop rod 203. The anti-drop assembly 200 also includes a stopper 204 arranged outside the anti-drop rod 203 and a stopper ring 205 inserted on the anti-drop rod 203. When in use, first The retaining ring 205 is inserted into the anti-drop rod 203, and after insertion, the locking nut 206 can be rotated to fix it. The sealing effect can be improved by the rubber pad 202, which makes it convenient for the locking nut 206 to block the well fluid, and the retaining ring 205 can reinforce the sealing effect. When the motor assembly 300 and the lower structure are damaged, the retaining ring 205 can contact with the rubber pad 202, which can prevent the parts from slipping on the one hand, and block the drilling fluid circulation channel on the other hand, so that the pump pressure increases rapidly and the drilling tool stops working, thereby playing an anti-drop effect.

[0029] Specifically, the motor assembly 300 is arranged at the bottom of the anti-drop assembly 200 .

[0030] Specifically, the universal joint assembly 400 is arranged at the bottom of the motor assembly 300, and a threaded hole 401 is opened on the outer side of the universal joint assembly 400. The threaded hole 401 is used to install the anti-drop component 600, so as to prevent the transmission shaft assembly 500 from falling.

[0031] Specifically, the transmission shaft assembly 500 is arranged at the bottom of the universal joint assembly 400, and a transmission shaft body 501 is arranged inside the transmission shaft assembly 500. A limiting groove 5011 is arranged on the outer side of the transmission shaft body 501. The limiting groove 5011 is annular and can be used in conjunction with the anti-drop component 600 to prevent the transmission shaft assembly 500 from falling.

[0032] Specifically, the anti-drop component 600 includes a stud 601 threadedly connected to the threaded hole 401 and an anti-drop plate 602 rotatably connected to the stud 601. The stud 601 is rotatable, and the rotating stud 601 can drive the anti-drop plate 602 to move horizontally until the anti-drop plate 602 is in the limiting groove 5011 of the drive shaft body 501. When the drive shaft assembly 500 falls, the anti-drop plate 602 is engaged with the limiting groove 5011, so that the drive shaft assembly 500 and the universal joint assembly 400 can be prevented from being separated, so that they can be used. Both studs 601 are T-shaped, and hexagonal grooves are provided on the two studs 601. Tools can be inserted into the hexagonal grooves to facilitate the rotation of the studs 601.

[0033] Specifically, the rubber sealing cover 700 is threadedly connected in the threaded hole 401. A handle 701 is provided on the rubber sealing cover 700. The two rubber sealing covers 700 correspond to the threaded holes 401 one by one. The rubber sealing cover 700 can be rotated by the handle 701 to be threadedly connected to the threaded hole 401. After the connection, the anti-drop part 600 can be sealed by the rubber sealing cover 700 to prevent external water from entering the interior and corroding the anti-drop part 600.

[0034] The working principle and use process of the utility model are as follows: when in use, the user can rotate the stud 601 of the anti-dropping part 600, and the rotating stud 601 can drive the anti-dropping plate 602 to move horizontally until the anti-dropping plate 602 is in the limiting groove 5011 of the transmission shaft body 501. When the transmission shaft assembly 500 falls, the anti-dropping plate 602 is engaged with the limiting groove 5011, so that the transmission shaft assembly 500 and the universal shaft assembly 400 can be prevented from being separated for easy use. When replacing the anti-dropping part 600, the anti-dropping plate 602 can be rotated to disengage from the stud 601, and the stud 601 can be rotated to disengage after disengagement. The threaded hole 401 can achieve the effect of detachable installation for replacement. When sealing, the rubber sealing cover 700 can be rotated by the handle 701 to be threadedly connected with the threaded hole 401. After connection, the anti-drop component 600 can be sealed by the rubber sealing cover 700 to prevent external water from entering the interior and corroding the anti-drop component 600. When the motor assembly 300 and the lower structure are damaged, the retaining ring 205 can contact the rubber pad 202, which can prevent the components from slipping on the one hand, and block the drilling fluid circulation channel on the other hand, so that the pump pressure increases rapidly and the drilling tool stops working, thereby playing an anti-drop effect.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An anti-dropping rotary impact screw drill, characterized in that: include: Bypass valve assembly (100); An anti-drop assembly (200) arranged at the bottom of the bypass valve assembly (100); A motor assembly (300) arranged at the bottom of the anti-drop assembly (200); A universal shaft assembly (400) is arranged at the bottom of the motor assembly (300), and a threaded hole (401) is provided on the outer side of the universal shaft assembly (400); A transmission shaft assembly (500) is arranged at the bottom of the universal shaft assembly (400), a transmission shaft body (501) is arranged inside the transmission shaft assembly (500), and a limiting groove (5011) is arranged on the outer side of the transmission shaft body (501); An anti-drop component (600) comprising a stud (601) threadedly connected to the threaded hole (401) and an anti-drop plate (602) rotatably connected to the stud (601); The rubber sealing cover (700) is threadedly connected in the threaded hole (401).

2. The anti-dropping and spinning screw drilling tool according to claim 1, characterized in that: The anti-drop assembly (200) comprises an anti-drop shell (201) arranged at the bottom of the bypass valve assembly (100), a rubber pad (202) bonded to the inner side of the anti-drop shell (201), an anti-drop rod (203) arranged at the top of the motor assembly (300), and a locking nut (206) threadedly connected to the top of the anti-drop rod (203).

3. The anti-dropping and spinning screw drilling tool according to claim 1, characterized in that: The anti-drop assembly (200) further comprises a stopper (204) arranged outside the anti-drop rod (203) and a stopper ring (205) inserted on the anti-drop rod (203).

4. The anti-dropping and spinning screw drilling tool according to claim 1, characterized in that: The limiting groove (5011) is annular.

5. The anti-dropping and spinning screw drilling tool according to claim 1, characterized in that: The two studs (601) are both T-shaped, and hexagonal grooves are formed on the two studs (601).

6. The anti-dropping and spinning screw drilling tool according to claim 1, characterized in that: The rubber sealing covers (700) are each provided with a handle (701), and the two rubber sealing covers (700) correspond to the threaded holes (401) one by one.

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