Universal shaft connector of double-layer structure power drilling tool

A power drilling tool, double-layer structure technology, applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problem that the screw drilling tool cannot be applied, and achieve the effect of increasing the sealing capacity, reducing wear and prolonging the service life

Pending Publication Date: 2021-04-02
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no cardan shaft with an internal closed flow channel design, which makes the screw drilling tool not suitable for double-layer pipe

Method used

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  • Universal shaft connector of double-layer structure power drilling tool
  • Universal shaft connector of double-layer structure power drilling tool
  • Universal shaft connector of double-layer structure power drilling tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The cardan shaft connector of a power drill with a double-layer structure described in this embodiment is used for a screw motor.

[0022] As shown in the figure, a double-layer structure power drilling tool cardan shaft connector is composed of an upper joint 1, a casing 2, a transmission ball 3, a screw joint 4, and a sealing plug 5. The screw joint 4 is connected to the screw rotor 6. The upper joint 1 is connected with the outer shell 2, and the other end is connected with the inner pipe 9. There is a transmission ball 3 and a sealing plug 5 between the screw joint 4 and the outer shell 2. The transmission ball 3 can realize the transmission of torque, and the transmission ball 3 and the outer shell 2 There is a radial gap between them, the sealing plug 5 can be compressed, and the screw joint 4 can swing around the upper joint through the spherical contact surface.

[0023] The above-mentioned double-layer structure power drill cardan shaft connector is characteriz...

Embodiment 2

[0028] The cardan shaft connector of a double-layer structure power drilling tool described in this embodiment is used in a screw pump.

[0029] As shown in the figure, a double-layer structure power drilling tool cardan shaft connector is composed of an upper joint 1, a casing 2, a transmission ball 3, a screw joint 4, and a sealing plug 5. The screw joint 4 is connected to the screw rotor 6. The upper joint 1 is connected with the outer shell 2, and the other end is connected with the inner pipe 9. There is a transmission ball 3 and a sealing plug 5 between the screw joint 4 and the outer shell 2. The transmission ball 3 can realize the transmission of torque, and the transmission ball 3 and the outer shell 2 There is a radial gap between them, the sealing plug 5 can be compressed, and the screw joint 4 can swing around the upper joint through the spherical contact surface.

[0030] The above-mentioned double-layer structure power drill cardan shaft connector is characterize...

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Abstract

The invention relates to a universal shaft connector of a double-layer structure power drilling tool. The universal shaft connector is composed of an upper joint, a shell, a transmission ball, a screwjoint and a sealing plug, the screw joint is connected with a screw rotor, the upper joint is connected with the shell, the other end is connected with an inner pipe, the transmission ball and the sealing plug are arranged between the screw joint and the shell, the transmission ball can achieve torque transmission, a gap is formed between the transmission ball and the shell in the radial direction, and the screw connector can swing around the upper joint through a spherical contact face; and Fluid in the inner pipe can flow through the interior of the screw rotor through a flow channel in thecardan shaft to be transmitted to a lower drilling tool, and liquid in the outer pipe flows through a cavity between the screw stator and the rotor from the exterior of the cardan shaft to push the rotor to rotate or be sucked. According to the connecting cardan shaft, an internal flow channel is provided on the basis of achieving the functions of an existing cardan shaft, the problem that a screw tool cannot be used for the double-layer pipe process is solved, and the connecting cardan shaft has the advantages of being simple in structure and long in service life.

Description

technical field [0001] The invention relates to the operation of a double-layer pipe screw tool in the petroleum field, in particular to a cardan shaft connector of a double-layer structure power drilling tool. Background technique [0002] Compared with conventional positive circulation drilling methods, double-tube reverse circulation drilling has high drilling speed, faster bottom hole cleaning, and higher cuttings migration efficiency, which can reduce the loss of circulating medium to protect oil and gas reservoirs and reduce drilling costs. The basic principle can be briefly summarized as that the drilling fluid is pumped in from the annular space of the double-layer drill pipe, flows through the reverse circulation drilling bit, and carries cuttings from the inner pipe back to the ground. Turbine pumps are widely used in reverse circulation drilling double-tube process because of their internal flow channels, but the pump pressure of turbo pumps is low and often requi...

Claims

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Application Information

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IPC IPC(8): E21B17/05
CPCE21B17/05
Inventor 唐洋赵鹏李泽良何胤王远倪申童熊浩宇王国荣王金忠姚佳鑫孙鹏赵金海
Owner SOUTHWEST PETROLEUM UNIV
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