Split type screw drill

Abstract

The utility model discloses a split type screw drill which comprises a screw drill body, a binding assembly and a protection assembly, and the screw drill body comprises a transmission shaft assembly on the lower portion. According to the split type screw drilling tool, the transmission shaft body is positioned and installed in the shell in the transmission shaft assembly, and the two ends of the transmission shaft body can be bound, supported and positioned through the pressing arc blocks positioned through the positioning rings at the two ends and bound through the positioning openings outside the bearings after the transmission shaft body is installed; therefore, the problem that the service life of a transmission shaft body in the transmission shaft assembly is shortened due to impact caused by sudden increase of the rotating speed of the motor assembly is solved, and after a pressing arc block on the outer side of the transmission shaft body moves outwards and is stored in a storage cavity, the transmission shaft body in the shell can be conveniently disassembled, overhauled, disassembled and replaced, and meanwhile the service life of the transmission shaft body is prolonged. The bearings and the balls are mounted at the inner ends and the outer sides of the pressing arc blocks, so that friction during rotation of the transmission shaft body cannot be increased during mounting of the pressing arc blocks.

Description

Technical Field

[0001] The utility model relates to the technical field of screw drill tools, in particular to a split screw drill tool. Background Art

[0002] The split screw drill is a type of volumetric downhole power drill that uses drilling fluid as power and converts liquid pressure energy into mechanical energy. It is mainly composed of a bypass valve assembly, a motor assembly, a universal shaft assembly, and a drive shaft assembly. The advantage of the split screw drill is that it directly provides power at the bottom of the well, reducing the wear and damage of the downhole drill. In addition, it has the characteristics of simple structure, easy operation, and high drilling efficiency. Therefore, it has been widely used in oil drilling, geological exploration and other fields.

[0003] In the existing split screw drill, the transmission shaft body installed in the bottom transmission shaft assembly is not convenient for accurate compression and positioning of the upper and lower ends of the transmission shaft body after installation. When the speed of the motor assembly increases sharply, it is easy to cause a certain impact on the transmission shaft body, which can easily affect the service life of the transmission shaft body. For this reason, we propose a split screw drill. Utility Model Content

[0004] The main purpose of the utility model is to provide a split screw drill, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A split screw drill comprises a screw drill body, a restraining component and a protective component, wherein the screw drill body comprises a transmission shaft assembly at the bottom, and an outer shell and a transmission shaft body constituting the transmission shaft assembly, wherein the restraining component comprises positioning rings fixedly mounted at the upper and lower ends of the outer side of the transmission shaft body, and concave rings provided in the transmission shaft body on the inner side of the positioning rings, wherein bearings are fixedly mounted in the concave rings, positioning openings are provided on the outer sides of the bearings, and a plurality of groups of arc-pressing blocks are movably arranged in the positioning openings, restraining holes are provided in the outer shells at the outer ends of the arc-pressing blocks, and connecting rods are movably mounted in the restraining holes, and the connecting rods are of T-shaped rectangular columnar structure, and the connecting rods are fixedly connected to the arc-pressing blocks at the inner ends.

[0007] Preferably, the restraining assembly further comprises a receiving cavity opened on the inner side of each restraining hole, and the receiving cavity is an annular structure, and the arc pressing block matches the receiving cavity.

[0008] Preferably, the restraint assembly further comprises a plurality of restraint openings arranged in a row in the positioning ring, and balls movably installed in the restraint openings.

[0009] Preferably, the protection component includes a connecting thread arranged at the outer end of the shell, and an external threaded barrel movably mounted at the outer end of the shell, and a blocking ring is also fixedly mounted at the outer end of the shell.

[0010] Preferably, the protection component further comprises a plurality of groups of threaded holes and mounting holes which are arranged and opened correspondingly between the external threaded cylinder and the blocking ring, and screws which are movably installed in the threaded holes and the mounting holes.

[0011] Preferably, the screw drill body also includes a universal shaft assembly, a motor assembly and a bypass valve assembly which are sequentially connected to the upper end of the transmission shaft assembly.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. In the utility model, the transmission shaft body positioned and installed in the outer shell of the transmission shaft assembly can be positioned by the positioning rings at both ends and the pressing arc blocks in the outer positioning openings of the bearings after installation, so as to perform the binding support positioning at both ends of the transmission shaft body, thereby avoiding the problem that the sudden increase in the speed of the motor assembly causes impact on the transmission shaft body in the transmission shaft assembly and reduces its service life. Moreover, after the pressing arc blocks on the outer side of the transmission shaft body are moved outward and stored in the storage cavity, the disassembly, inspection and replacement of the transmission shaft body in the outer shell can also be conveniently realized. At the same time, the bearings and balls installed on the inner and outer ends of the pressing arc blocks also ensure that the installation of the pressing arc blocks will not increase the friction during the rotation of the transmission shaft body.

[0014] 2. In the utility model, the external threaded barrel installed on the outer side of the shell and the multiple sets of screws installed between the external threaded barrel and the upper blocking ring can also be installed by restraining the external threaded barrel on the outer side of the connecting rod to achieve stability in the pressing of the arc block at the inner end of the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side sectional view of the utility model;

[0016] Figure 2 For this utility model Figure 1 A is an enlarged view of the middle image.

[0017] Reference numerals:

[0018] 100, screw drill body; 110, transmission shaft assembly; 101, housing; 102, transmission shaft body; 120, universal shaft assembly; 130, motor assembly; 140, bypass valve assembly;

[0019] 200, restraint assembly; 201, positioning ring; 202, concave ring; 203, bearing; 204, positioning port; 205, arc pressing block; 206, restraint hole; 207, connecting rod; 208, storage cavity; 209, restraint port; 210, ball;

[0020] 300, protective component; 301, external threaded barrel; 302, blocking ring; 303, threaded hole; 304, mounting hole; 305, screw. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] Embodiment 1:

[0023] like Figure 1-2 As shown, this embodiment provides a split screw drill, including a screw drill body 100, a restraining assembly 200 and a protective assembly 300. The screw drill body 100 includes a transmission shaft assembly 110 at the bottom, and a housing 101 and a transmission shaft body 102 constituting the transmission shaft assembly 110. The screw drill body 100 also includes a universal shaft assembly 120, a motor assembly 130 and a bypass valve assembly 140 connected in sequence to the upper end of the transmission shaft assembly 110. The restraining assembly 200 includes a positioning ring 201 fixedly installed at both the upper and lower ends of the outer side of the transmission shaft body 102, and a concave ring 202 provided in the transmission shaft body 102 on the inner side of the positioning ring 201, and a bearing 203 is also fixedly installed in the concave ring 202, and the outer side of the bearing 203 is fixedly installed. A positioning hole 204 is also opened on the side, and a plurality of groups of arc pressing blocks 205 are arranged and movably installed in the positioning hole 204. A binding hole 206 is also opened in the outer end shell 101 of the arc pressing block 205. A connecting rod 207 is movably installed in the binding hole 206, and the connecting rod 207 is a T-rectangular column structure. The connecting rod 207 and the inner end of the arc pressing block 205 are fixedly connected. The binding assembly 200 also includes a storage cavity 208 opened on the inner side of the binding hole 206, and the storage cavity 208 is an annular structure. The arc pressing block 205 matches the storage cavity 208. The binding assembly 200 also includes a plurality of binding holes 209 arranged and opened in the positioning ring 201, and balls 210 movably installed in the binding holes 209.

[0024] Specifically, the split screw drill is a volumetric downhole power drill that uses drilling fluid as power to convert liquid pressure energy into mechanical energy. It is mainly composed of a bypass valve assembly 140, a motor assembly 130, a universal shaft assembly 120, a transmission shaft assembly 110, and other components; the transmission shaft body 102 positioned and installed in the housing 101 of the transmission shaft assembly 110 can be positioned by the positioning rings 201 at both ends and the arc-pressing block 205 in the outer positioning port 204 of the bearing 203 after installation, so as to provide restraint support for the positions of the two ends of the transmission shaft body 102. Positioning can be performed to avoid the problem that the sudden increase in the speed of the motor assembly 130 causes an impact on the drive shaft body 102 in the drive shaft assembly 110 and reduces its service life. After the arc suppression block 205 on the outside of the drive shaft body 102 is moved outward and stored in the storage cavity 208, the drive shaft body 102 in the housing 101 can be easily disassembled, inspected and replaced. At the same time, the bearings 203 and balls 210 installed on the inner and outer ends of the arc suppression block 205 also ensure that the installation of the arc suppression block 205 will not increase the friction of the drive shaft body 102 during rotation.

[0025] Embodiment 2:

[0026] Based on the first embodiment, Figure 2 As shown, the protection component 300 includes a connecting thread set at the outer end of the shell 101, and an external threaded tube 301 movably installed at the outer end of the shell 101, and a blocking ring 302 is also fixedly installed at the outer end of the shell 101. The protection component 300 also includes a plurality of groups of threaded holes 303 and mounting holes 304 arranged and correspondingly opened between the external threaded tube 301 and the blocking ring 302, and screws 305 movably installed in the threaded holes 303 and the mounting holes 304.

[0027] Specifically, the external threaded barrel 301 installed on the outer side of the outer shell 101 in the transmission shaft assembly 110 is mainly used to constrain and press the outer sides of the multiple groups of connecting rods 207 at the outer end of the outer shell 101 to achieve the stability of the arc block 205 at the inner end of the connecting rod 207 during pressing. The multiple groups of screws 305 installed between the top of the external threaded barrel 301 and the blocking ring 302 are mainly used to reinforce the external threaded barrel 301 installed on the outer end of the outer shell 101, thereby ensuring the stability of the arc block 205 during pressing.

[0028] The working principle and use process of this utility model:

[0029] When the increased speed of the motor assembly 130 in the screw drill body 100 is transmitted to the upper end of the transmission shaft body 102 in the transmission shaft assembly 110 via the universal joint assembly 120, after the transmission shaft body 102 is installed inside the housing 101, the multiple sets of connecting rods 207 at both ends of the housing 101 are moved inward to position and press the arc pressing blocks 205 at their inner ends into the positioning openings 204 between the positioning ring 201 and the bearing 203, thereby realizing the restraint of the positions of the two ends of the transmission shaft body 102 after installation in the housing 101, so that when the increased speed of the motor assembly 130 is transmitted to the transmission shaft body 102 via the universal joint assembly 120, it will not cause too much impact on the transmission shaft body 102. At the same time, the external threaded cylinder 301 installed at the outer end of the housing 101 can also ensure the stability of the arc pressing block 205 during pressing.

[0030] 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. A split screw drill, comprising a screw drill body (100), a restraining assembly (200) and a protective assembly (300), wherein the screw drill body (100) comprises a lower transmission shaft assembly (110), and a housing (101) and a transmission shaft body (102) constituting the transmission shaft assembly (110), characterized in that: The restraining assembly (200) comprises a positioning ring (201) fixedly installed at the upper and lower ends of the outer side of the transmission shaft body (102), and a concave ring (202) provided in the transmission shaft body (102) inside the positioning ring (201); a bearing (203) is fixedly installed in the concave ring (202); a positioning opening (204) is provided on the outer side of the bearing (203); a plurality of groups of arc suppressing blocks (205) are movably arranged in the positioning opening (204); a restraining hole (206) is provided in the outer end shell (101) of the arc suppressing block (205); a connecting rod (207) is movably installed in the restraining hole (206); and the connecting rod (207) is a T-shaped rectangular column structure. The connecting rod (207) is fixedly connected to the arc suppressing block (205) at the inner end.

2. A split screw drill according to claim 1, characterized in that: The restraining assembly (200) further comprises a receiving cavity (208) provided inside each restraining hole (206), and the receiving cavity (208) is an annular structure, and the arc pressing block (205) matches the receiving cavity (208).

3. A split screw drill according to claim 1, characterized in that: The binding assembly (200) further comprises a plurality of binding openings (209) arranged in a row in the positioning ring (201), and balls (210) movably installed in the binding openings (209).

4. A split screw drill according to claim 1, characterized in that: The protection component (300) comprises a connecting thread provided at the outer end of the housing (101), and an external threaded barrel (301) movably mounted at the outer end of the housing (101); a blocking ring (302) is also fixedly mounted at the outer end of the housing (101).

5. The split screw drill according to claim 1, characterized in that: The protection component (300) further comprises a plurality of groups of threaded holes (303) and mounting holes (304) arranged and correspondingly opened between the external threaded cylinder (301) and the blocking ring (302), and screws (305) movably installed in the threaded holes (303) and the mounting holes (304).

6. A split screw drill according to claim 1, characterized in that: The screw drill body (100) further comprises a universal shaft assembly (120), a motor assembly (130) and a bypass valve assembly (140) which are sequentially connected to the upper end of the transmission shaft assembly (110).

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