CN218347324U

CN218347324U - Screw drill rotor lengthening shaft

Info

Publication number: CN218347324U
Application number: CN202222334505.4U
Authority: CN
Inventors: 岳甫卿; 董静辉; 高垒; 王伟
Original assignee: Shandong Dongyuan Petroleum Equipment Co ltd
Current assignee: Shandong Dongyuan Petroleum Equipment Co ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2023-01-20
Anticipated expiration: 2032-09-02

Abstract

The utility model provides a screw rod drilling tool rotor extension shaft mainly relates to the oil drilling equipment field. A screw drill rotor extension shaft comprises a rotor and an extension shaft, wherein a threaded hole is formed in one end face of the rotor, an inverted tooth thread is arranged on the outer ring of one end of the extension shaft, the rotor is connected with the extension shaft through the thread, a welding groove is formed in the position, close to a step of the inverted tooth thread, of the extension shaft, the rotor and the extension shaft are welded firmly through a welding mode after threaded connection, and secondary reinforcement is carried out to enable connection to be more reliable. The beneficial effects of the utility model reside in that: the utility model discloses simple structure, the installation of being convenient for is used, adopts the mode of dual connection to connect and makes the locking effect promote by a wide margin, and safe and reliable more in the use is difficult to appear the phenomenon that threaded connection pine detains or drops, has reduced the risk that the screw rod drilling tool fell into the well by a wide margin, has practiced thrift equipment cost, has improved the efficiency of well drilling.

Description

Screw drill rotor lengthening shaft

Technical Field

The utility model mainly relates to an oil drilling equipment field specifically is a screw rod drilling tool rotor extension shaft.

Background

The screw drilling tool is a downhole power drilling tool which is most widely used in petroleum exploration and development at present, is mainly used for deflecting and twisting azimuth construction of directional wells and horizontal wells, and is partially used for drilling/workover operations of special process wells such as vertical well back buckling or sidetracking windowing. The screw drilling tool mainly comprises a bypass valve assembly, a motor assembly, a universal shaft assembly and a transmission shaft assembly, wherein the motor assembly comprises a stator, a rotor and an extension shaft.

In the drilling construction process, the shell of the screw drill is easy to be released under the condition of being blocked or suddenly released, the inner rotor part can be pulled to fall down after the shell is released, the lengthened shaft can effectively prevent the rotor from continuously falling, and the anti-falling effect is achieved. However, in the prior art, the rotor and the lengthened shaft are in common threaded connection, and the thread loosening or falling of the thread connection is easily caused due to hydraulic impact, rotor rotation and the like in the use process, so that the lengthened shaft finally fails, and the screw rod partially falls into the well, thereby causing serious consequences.

SUMMERY OF THE UTILITY MODEL

For solving prior art's is not enough, the utility model provides a screw rod drilling tool rotor extension shaft, the device simple structure, be convenient for install and use, the rotor is connected through back-off tooth screw thread with the extension shaft, it is firm with rotor and extension shaft welding at rethread welding mode after the connection, carry out the secondary and consolidate, because the characteristics of back-off tooth screw are just preventing to open, prevent tearing open, so only be applicable to the main part that does not tear open, this kind of threaded connection makes the security performance promote by a wide margin with the fixed connection mode that the welding combined together, safety and reliability more, the locking effect is guaranteed.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

a screw drill rotor lengthening shaft comprises a rotor and a lengthening shaft, wherein a threaded hole is formed in one end face of the rotor, an inverted tooth thread is arranged on the outer ring of one end of the lengthening shaft, the rotor is connected with the lengthening shaft through the thread, and a welding groove is formed in the position, close to the step of the inverted tooth thread, of the lengthening shaft.

The thread of the back-off tooth is coaxial with the lengthened shaft.

The outer ring of one end, away from the thread of the reverse thread, of the lengthened shaft is provided with a first external thread and a second external thread, the first external thread is a positive-rotation thread, and the second external thread is a left-rotation thread.

Contrast prior art, the beneficial effects of the utility model are that:

the utility model discloses simple structure, the installation of being convenient for is used, adopts the mode of dual connection to connect and makes the locking effect promote by a wide margin, and safe and reliable more in the use is difficult to appear the phenomenon that threaded connection pine detains or drops, has reduced the risk that the screw rod drilling tool fell into the well by a wide margin, has practiced thrift equipment cost, has improved the efficiency of well drilling.

Drawings

FIG. 1 is a schematic view of the cross-sectional view structure of the present invention;

FIG. 2 is a schematic view of the rotor structure of the present invention;

FIG. 3 is a schematic view of the structure of the lengthened shaft of the present invention;

FIG. 4 is a schematic view of the partial structure of the present invention;

fig. 5 is a schematic view of the main viewing angle structure of the present invention.

Reference numerals shown in the drawings: 1. a rotor; 11. a threaded hole; 2. lengthening a shaft; 21. reversing thread; 22. welding a groove; 23. a first external thread; 24. a second external thread.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention can be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present invention.

According to the attached drawing, the screw drill rotor lengthening shaft comprises a rotor 1 and a lengthening shaft 2, a threaded hole 11 is formed in one end face of the rotor 1, an inverted tooth thread 21 is arranged on the outer ring of one end of the lengthening shaft 2, the rotor 1 is connected with the lengthening shaft 2 through threads, a welding groove 22 is formed in the position, close to the step of the inverted tooth thread 21, of the lengthening shaft 2, the rotor 1 and the lengthening shaft 2 are welded firmly through a welding mode after threaded connection, and secondary reinforcement is conducted to enable connection to be more reliable.

The back-off thread 21 is coaxial with the lengthened shaft 2.

The outer ring of one end, far away from the back-off thread 21, of the lengthened shaft 2 is provided with a first external thread 23 and a second external thread 24, the first external thread 23 is a positive-rotation thread, and the second external thread 24 is a left-rotation thread.

When the device is used, the lengthening shaft 2 is screwed into the threaded hole 11, and after the lengthening shaft is rotated to the position, the rotor 1 and the welding groove 22 are welded, so that the rotor 1 and the lengthening shaft 2 are locked and fixed.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a screw rod drilling tool rotor extension shaft, includes rotor (1) and extension shaft (2), its characterized in that: a threaded hole (11) is formed in one end face of the rotor (1), an inverted tooth thread (21) is arranged on the outer ring of one end of the lengthened shaft (2), the rotor (1) is connected with the lengthened shaft (2) through the thread, and a welding groove (22) is formed in the position, close to the step of the inverted tooth thread (21), of the lengthened shaft (2).

2. The screw drill rotor extension shaft of claim 1, wherein: the thread (21) of the back-off thread is coaxial with the lengthened shaft (2).

3. The screw drill rotor extension shaft of claim 2, wherein: the outer ring of one end, far away from the back-off thread (21), of the lengthened shaft (2) is provided with a first external thread (23) and a second external thread (24), the first external thread (23) is a positive-rotation thread, and the second external thread (24) is a left-rotation thread.