CN218265822U

CN218265822U - Anti-falling mechanism for transmission shaft assembly of screw drill

Info

Publication number: CN218265822U
Application number: CN202221916586.2U
Authority: CN
Inventors: 刘海宁; 周喜勇; 孙晓日; 罗绪良; 黄玉明
Original assignee: Tianjin Lilin Petroleum Machinery Co ltd
Current assignee: Tianjin Lilin Petroleum Machinery Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-01-10
Anticipated expiration: 2032-07-25

Abstract

The utility model relates to the technical field of drilling tools, in particular to an anti-falling mechanism for a screw drill transmission shaft assembly, which comprises a transmission shaft, a lower TC bearing movable sleeve, a lower TC bearing static sleeve, a pin, a thrust bearing group, a transmission shaft shell, an upper TC bearing static sleeve and an upper TC bearing movable sleeve; lower TC bearing moves the cover with lower TC bearing and passes through pin joint is in the same place, the TC bearing moves the cover and the transmission shaft passes through threaded connection together down, the transmission shaft casing passes through threaded connection with lower TC bearing stationary sleeve, the thrust bearing group-mounting is in between transmission shaft casing and the transmission shaft, go up TC bearing stationary sleeve and install between transmission shaft casing and thrust bearing group, it moves set threaded connection to go up the TC bearing on the transmission shaft. The lower TC bearing static sleeve is connected with the lower TC bearing through the pin, and the lower TC bearing is connected with the lower part of the transmission shaft through the threads, so that the failure part does not drop, and the underground safety is ensured.

Description

Anti-falling mechanism for transmission shaft assembly of screw drill

Technical Field

The utility model relates to an oil drilling instrument technical field, especially a screw drill transmission shaft assembly anti-drop mechanism.

Background

In oil and gas drilling, the screw drilling tool is mainly used for drilling special process wells, and can also be used for drilling vertical wells. With the development of oil and gas exploration and development forms, well drilling technology is continuously developed, and the level of a screw drilling tool is continuously improved and improved. By comprehensively observing the development process and the development trend, the direction can be basically summarized as follows: long service life, large torque, high rotation speed and multiple functions. At present, a transmission shaft assembly of a screw drill used in drilling engineering of petroleum and natural gas aims to transmit power of a motor to a drill bit, and the service life of the transmission shaft assembly determines the service life of the whole screw drill. The motor transmits power to the transmission shaft through the universal shaft, the transmission shaft assembly bears drilling pressure and transmits torque and rotating speed during drilling, the number of parts of the transmission shaft assembly is large, and the transmission shaft assembly fails to work in a well for a long time, so that underground accidents are caused. The drive shaft breaks from the lower bearing and often falls into the well due to a lower drop prevention failure.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a problem among the above-mentioned background of effectual solution has provided a screw drill transmission shaft assembly anti falling mechanism.

The specific technical scheme is as follows:

a screw drill transmission shaft assembly anti-falling mechanism comprises a transmission shaft, a lower TC bearing movable sleeve, a lower TC bearing static sleeve, a pin, a thrust bearing group, a transmission shaft shell, an upper TC bearing static sleeve and an upper TC bearing movable sleeve; lower TC bearing moves the cover with lower TC bearing and passes through pin joint is in the same place, the TC bearing moves the cover and the transmission shaft passes through threaded connection together down, the transmission shaft casing passes through threaded connection with lower TC bearing stationary sleeve, the thrust bearing group-mounting is in between transmission shaft casing and the transmission shaft, go up TC bearing stationary sleeve and install between transmission shaft casing and thrust bearing group, it moves set threaded connection to go up the TC bearing on the transmission shaft.

Preferably, a limit groove is formed in the circumference of one end of the lower TC bearing movable sleeve, and the pin penetrates through the lower TC bearing static sleeve to be matched with the limit groove.

Preferably, the cross section of the limiting groove is trapezoidal.

Preferably, the number of the pins is six, and the pins are uniformly distributed around the lower TC bearing static sleeve.

Compared with the prior art, the beneficial effects of the utility model are that: compared with the prior art, the lower TC bearing static sleeve is connected with the lower TC bearing through the pin, the lower TC bearing is connected with the lower part of the transmission shaft through the threads, so that the failure part does not drop, and the underground safety is guaranteed.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the lower TC bearing movable sleeve of the present invention;

fig. 3 is a cross-sectional view of the middle lower TC bearing stator sleeve of the present invention.

Detailed Description

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

The following detailed description of the preferred embodiments of the invention is provided with reference to the accompanying drawings. As shown in fig. 1-3, an anti-drop mechanism for a transmission shaft assembly of a screw drill comprises a transmission shaft 1, a lower TC bearing movable sleeve 2, a lower TC bearing stationary sleeve 3, a pin 4, a thrust bearing group 5, a transmission shaft housing 6, an upper TC bearing stationary sleeve 7 and an upper TC bearing movable sleeve 8; the lower TC bearing static sleeve and the lower TC bearing movable sleeve are connected together through the pin, specifically, a limit groove 9 is formed in the periphery of one end of the lower TC bearing movable sleeve, and the pin penetrates through the lower TC bearing static sleeve to be matched with the limit groove. The lower TC bearing movable sleeve and the transmission shaft are connected together through threads, the transmission shaft shell and the lower TC bearing static sleeve are connected through threads, the thrust bearing set is installed between the transmission shaft shell and the transmission shaft, the upper TC bearing static sleeve is installed between the transmission shaft shell and the thrust bearing set, and the upper TC bearing movable sleeve is connected on the transmission shaft through threads.

The drive shaft breaks from the lower bearing and often falls into the well due to a lower drop prevention failure. As shown in fig. 2 and 3, the utility model discloses it will descend TC bearing quiet cover 3 and lower TC bearing to move cover 2 to link together through 6 pins exactly to be in the lower TC bearing department, and lower TC bearing moves cover 2 and transmission shaft 1 and passes through threaded connection together, TC department fracture when the transmission shaft under, transmission shaft casing 6 passes through threaded connection with lower TC bearing quiet cover 3, lower TC bearing quiet cover 3 will descend the TC bearing to connect through 6 pins, lower TC bearing passes through the screw and connects the transmission shaft sub-unit, thereby guarantee that the inefficacy part does not drop, guarantee safety in the pit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a screw drill transmission shaft assembly anti falling mechanism which characterized in that: the device comprises a transmission shaft, a lower TC bearing movable sleeve, a lower TC bearing static sleeve, a pin, a thrust bearing group, a transmission shaft shell, an upper TC bearing static sleeve and an upper TC bearing movable sleeve; lower TC bearing quiet cover and lower TC bearing move the cover and pass through pin joint is in the same place, the TC bearing moves the cover and passes through threaded connection together with the transmission shaft down, the transmission shaft casing passes through threaded connection with lower TC bearing quiet cover, the thrust bearing group-mount is in between transmission shaft casing and the transmission shaft, it installs between transmission shaft casing and thrust bearing group to go up TC bearing quiet cover, it moves set threaded connection to go up the TC bearing on the transmission shaft.

2. The anti-drop mechanism of the transmission shaft assembly of the screw drill according to claim 1, wherein a limit groove is formed in the periphery of one end of the lower TC bearing movable sleeve, and the pin penetrates through the lower TC bearing static sleeve to be matched with the limit groove.

3. The anti-drop mechanism of the transmission shaft assembly of the screw drill according to claim 2, wherein the cross section of the limiting groove is trapezoidal.

4. The anti-drop mechanism of the transmission shaft assembly of the screw drill according to claim 2, wherein six pins are uniformly distributed around the lower TC bearing static sleeve.