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Cardan shaft assembly and high-frequency impact screw drilling tool using the cardan shaft assembly

A screw drilling tool and high-frequency impact technology, which is applied in the direction of drill pipe, drill pipe, drill bit, etc., can solve the problems of cardan shaft assembly fatigue fracture, slipping, and low life of the whole machine, so as to reduce adverse effects and improve structural strength. Good, simple processing effect

Active Publication Date: 2019-03-05
YANCHENG DONGRONG PETROLEUM MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the shortcoming that the cardan shaft assembly of the high-frequency impact screw drilling tool using the petal-type cardan shaft bearing in the prior art is prone to fatigue fracture or slipping, which makes the service life of the whole machine low, and proposes a Cardan shaft assembly and high-frequency impact screw drilling tool using the cardan shaft assembly

Method used

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  • Cardan shaft assembly and high-frequency impact screw drilling tool using the cardan shaft assembly
  • Cardan shaft assembly and high-frequency impact screw drilling tool using the cardan shaft assembly
  • Cardan shaft assembly and high-frequency impact screw drilling tool using the cardan shaft assembly

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Effect test

no. 1 example

[0035] see figure 1 , the present embodiment provides a cardan shaft assembly, the cardan shaft assembly includes a cardan shaft 1, the two ends of the cardan shaft 1 are connected with outer joints 2, and the outside of the outer joint 2 The rotor and the transmission shaft of the screw drilling tool are respectively connected, and the outer casing joint 2 is respectively connected with the cardan shaft through the steel ball in the cage, so as to realize the connection and power transmission with the transmission shaft and the rotor of the screw drilling tool. It is characterized in that The jacket joint 2 includes a jacket joint convex part 21 and a jacket joint concave part 22, the jacket joint convex part 21 is inserted into the jacket joint concave part 22 and is connected with the jacket joint concave part 22 in a gap, and the jacket joint convex part 21 is not connected with the outer casing joint concave portion 22 is provided with a first connecting head 23 for conne...

no. 2 example

[0063] This embodiment provides a high-frequency impact screw drilling tool using the cardan shaft assembly described in the first embodiment.

[0064] see Figure 6 , the high-frequency percussion screw drilling tool includes the cardan shaft assembly described in the first embodiment, and also includes a bypass valve assembly 5, a motor assembly 6, a transmission shaft assembly 7 and a high-frequency percussion drilling tool 8, The bypass valve assembly 5, the motor assembly 6, the cardan shaft assembly, the transmission shaft assembly 7 and the high-frequency percussion drilling tool 8 are connected sequentially from top to bottom.

[0065] The bypass valve assembly 5, the motor assembly 6 and the transmission shaft assembly 7 can all adopt similar structures in the prior art, for example, the patent No. 201410150118.2 patent name is efficient and durable screw drilling tool. The structure described in; the high-frequency percussion drilling tool can adopt the patent No. 2...

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Abstract

Provided are a universal shaft assembly and a high-frequency impact screw drill applying the same. The universal shaft assembly comprises a universal shaft, the two ends of the universal shaft are sleeved with externally-sleeving joints to be connected with a rotor and a transmission shaft of the screw drill correspondingly. Each externally-sleeving joint comprises an externally-sleeving joint convex part and an externally-sleeving joint concave part. The externally-sleevingjoint convex part is inserted into the externally-sleeving joint concave part and is connected with the externally-sleeving joint concave part in a clearance mode. The other end face, not connected with the externally-sleeving joint concave part, of the externally-sleeving joint convex part is provided with a first connection head which is used for connecting the rotor or the transmission shaft. The other end face, not connected with the externally-sleeving joint convex part, of the externally-sleeving joint concave part is provided with a second connection piece used for connecting the universal shaft. A connection base is arranged in the center of the inner side of the externally-sleeving joint convex part, concave grooves are formed in the connection base in the radial direction, the two ends of the universal shaft are provided with convex teeth which correspond to the concave grooves, at least two connection holes are formed in the inner side of the externally-sleeving joint concave part, and the two connection holes are connected through a small connection shaft.

Description

technical field [0001] The invention belongs to the technical field of oil and gas drilling and completion, and in particular relates to a cardan shaft assembly and a high-frequency impact screw drilling tool using the cardan shaft assembly. Background technique [0002] Screw drilling tool is a volumetric downhole dynamic drilling tool that uses drilling fluid as power and converts fluid pressure energy into mechanical energy. It is currently the most widely used drilling tool in the field of oil and natural gas drilling at home and abroad. It mainly includes bypass Valve assembly, motor assembly, universal joint shaft assembly and transmission shaft assembly, bypass valve assembly, motor assembly, universal joint shaft assembly and transmission shaft assembly are connected sequentially from top to bottom, and drilling fluid is connected from side to side The through valve enters the motor, forming a certain pressure difference between the inlet and outlet of the motor, pus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/02E21B10/44
CPCE21B10/44E21B17/02
Inventor 王玉刚
Owner YANCHENG DONGRONG PETROLEUM MACHINERY CO LTD
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