CN114607303A

CN114607303A - Electrically-driven underground oil pipe internal cutting tool

Info

Publication number: CN114607303A
Application number: CN202011435038.3A
Authority: CN
Inventors: 黄毓祥; 倪益民; 张玺亮; 李志彬; 夏环宇; 刘志伟; 陈鹏飞; 李文良; 吴事难; 钱雪森
Original assignee: CNOOC Energy Technology and Services Ltd
Current assignee: CNOOC Energy Technology and Services Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2022-06-10

Abstract

The invention discloses an electrically-driven underground cutting tool in an oil pipe, which comprises a cutting knife, a rotary tool bit, a lower anchor, a pipe body, an upper anchor, an electronic control system, an upper centralizer, a lower centralizer, an upper joint and a cable, wherein the upper centralizer is arranged on the pipe body; the whole instrument is cylindric, and the cutting knife is installed on rotatory tool bit, and anchor can stretch out and draw back anchor in the oil pipe inner wall down, and driving motor is located the storehouse, goes up anchor and anchor synchronous motion down, and electronic control system carries out the control of each action, goes up centralizer and centralizer down and installs the wheel of rightting, has the automatic function placed in the middle, connects the connecting cable on the instrument. The structure can bear larger cutting force in a smaller volume, is suitable for pipe internal cutting equipment, and has good rigidity.

Description

Electrically-driven underground oil pipe internal cutting tool

Technical Field

The invention belongs to the technical field of underground well repair, and particularly relates to an electrically-driven cutting tool in an underground oil pipe.

Background

In the middle of current well workover technical field in the pit, the tubular product cutting mainly contains hot cutting and cold cutting two kinds, and hot cutting adopts the chemistry mode mostly, and dangerous height, the operation difficulty, and the success rate is low, and causes the pollution to the environment. Cold cutting adopts physics cutting knife mode, and is environment-friendly, and its concrete implementation form also has a plurality ofly, and it is adopting drilling rod, oil pipe to carry to use more at present, is connected to drilling rod, oil pipe bottom with cutting tool, produces thrust through hydraulic pressure, and with the contact of sleeve pipe inner wall, it is rotatory to rotate the drilling tool and drive the cutting knife, accomplishes the cutting, and above cutting mode can also use to the major diameter sleeve pipe, but to minor diameter oil pipe, receives cutting equipment size restriction, uses the difficulty.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an electrically-driven downhole oil pipe inner cutting tool. The cutting tool fills the blank of the market, can work in a small oil pipe due to the fact that the cutting tool is provided with a small outer diameter, is wide in application range, is conveyed by a cable, and is convenient to use and low in cost due to the fact that the motor is adopted to drive the cutting knife to rotate to cut.

The invention is realized by the following technical scheme:

an electrically-driven underground cutting tool in an oil pipe comprises a cutting knife, a rotary tool bit, a lower anchor, a pipe body, an upper anchor, an electronic control system, an upper centralizer, a lower centralizer, an upper joint and a cable;

the lower end of the pipe body is provided with a rotary cutter head, the cutting knife is arranged on the rotary cutter head, and the pipe body is sequentially provided with a lower anchor, an upper centralizer and a lower centralizer from bottom to top; an upper joint is arranged at the upper end of the pipe body; an electronic control system is arranged in the pipe body, the upper joint is connected with a cable, and the cable supplies power for the electronic control system.

In the technical scheme, the upper anchor and the lower anchor are used for being telescopically anchored on the inner wall of the oil pipe, the instrument rotates, and the anchoring mechanism is driven by the motor.

In the above technical solution, the upper anchor and the lower anchor are in synchronous action.

In the above technical solution, the electronic control system is configured to control each operation.

In the above technical scheme, the upper centralizer and the lower centralizer are both provided with a centralizing wheel and a spring supporting arm.

In the above technical scheme, the upper centralizer and the lower centralizer have an automatic centering function.

In the technical scheme, the rotary connector is arranged in the upper joint, so that the rotary stress of the cable can be released.

In the technical scheme, the cutting knife is arranged on the rotary cutter head, and the cutting knife is a conventional cutting knife for a lathe, so that the use cost is low, and the replacement is convenient.

In the technical scheme, the anchor is driven by electric power, can be extended and retracted through ground control, is suitable for pipes of different types, and has an automatic centering function.

In the technical scheme, the electronic control system adopts a high-temperature design, can adapt to various severe working conditions, and can work only by one cable during data transmission and motor driving.

The invention has the advantages and beneficial effects that:

the utility model provides an electrically driven instrument of cutting in oil pipe in pit, whole instrument is cylindricly, and the cutting knife is installed on rotatory tool bit, and anchor in the oil pipe inner wall that can stretch out and draw back down of anchor, driving motor are located the storehouse, go up anchor and anchor synchronization action down, and electronic control system carries out the control of each action, goes up the centralizer and installs with lower centralizer and right the wheel, has the automatic function placed in the middle, connects the connecting cable on the instrument. The structure can bear larger cutting force in a smaller volume, is suitable for pipe internal cutting equipment, and has good rigidity.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Wherein: 1 is the cutting knife, 2 is rotatory tool bit, 3 is lower anchor, 4 is the body, 5 are last anchor, 6 are electronic control system, 7 are last centralizer, 8 are lower centralizer, 9 are the top connection, 10 are the cable.

For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.

Examples

The utility model provides an electrically driven is cutting means in oil pipe in pit, by cutting knife 1, rotatory tool bit 2, anchor 3 down, storehouse 4, go up anchor 5, electronic control system 6, go up centralizer 7, centralizer 8 down, top connection 9 and cable 10 are constituteed, whole instrument is cylindricly, cutting knife 1 is installed on rotatory tool bit 2, anchor 3 can stretch out and draw back the anchoring in the oil pipe inner wall down, driving motor is located storehouse 4, go up anchor 5 and 3 synchronization action, electronic control system 6 carries out the control of each action, go up centralizer 7 and centralizer 8 down and install the wheel of rightting, have the function of automatic centering, instrument top connection 9 connecting cable 10.

The working process is as follows: before carrying out the cutting action, carry the instrument earlier inside to the tubular product that needs the cutting, the instrument is connected with ground control system by the cable, the anchoring instruction is assigned to the ground, anchoring motor forward rotation, anchor extends simultaneously from top to bottom, the instrument anchor is inside tubular product, assign the cutting instruction immediately, main driving motor begins the forward rotation, it begins rotatoryly to drive the cutter, the cutter stretches out automatically simultaneously, cut the tubular product, the ground suggestion cutting finishes the back, assign the cutter and withdraw the instruction, main driving motor carries out the reverse rotation, the cutter is withdrawed and is accomplished the back, assign the anchoring and remove the instruction, anchoring motor reverse rotation, remove the anchoring, can shift out the instrument inside the tubular product.

The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.

Claims

1. An electrically driven downhole in-tubing cutting tool, comprising: the device comprises a cutting knife, a rotary cutter head, a lower anchor, a tube body, an upper anchor, an electronic control system, an upper centralizer, a lower centralizer, an upper joint and a cable;

2. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the upper anchor and the lower anchor are used for being telescopically anchored on the inner wall of the oil pipe, the instrument rotates, and the anchoring mechanism is driven by a motor.

3. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the upper anchor and the lower anchor act synchronously.

4. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the electronic control system is used for controlling each action.

5. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the upper centralizer and the lower centralizer are both provided with a centralizing wheel and a spring supporting arm.

6. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the upper centralizer and the lower centralizer have an automatic centering function.

7. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: and a rotary connector is arranged in the upper joint, so that the rotary stress of the cable can be released.

8. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the cutting knife is installed on the rotary cutter head, and the cutting knife is a conventional cutting knife for a lathe.

9. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the anchor is driven by electric power and can be extended and retracted through ground control.

10. An electrically driven downhole in-tubing cutting tool according to claim 1, wherein: the electronic control system adopts a high-temperature resistant design.