Unlock instant, AI-driven research and patent intelligence for your innovation.

Top drive drilling system using low-speed direct-driven AC motor, and application thereof

A technology of AC motor and motor frame, which is applied to electric components, drilling equipment, magnetic circuit rotating parts, etc., can solve problems such as increasing system cost, increasing system weight, and increasing the number of parts that may fail

Inactive Publication Date: 2011-05-04
LETOURNEAU TECH DRILLING SYST
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reduction gearing such as the gearbox described above increases system cost, increases maintenance requirements, increases the number of parts that can fail and increases system weight

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Top drive drilling system using low-speed direct-driven AC motor, and application thereof
  • Top drive drilling system using low-speed direct-driven AC motor, and application thereof
  • Top drive drilling system using low-speed direct-driven AC motor, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In general, applicants have invented a new top drive drilling system that uses a low speed variable frequency AC motor that does not require a mechanical reduction gear. The AC motors disclosed herein are capable of running at speeds from 0 rpm to about 300 rpm and can be controlled by conventional pulse width modulated (PWM) variable speed drives such as the commercially available V3000 from Oilfield-Electric-Marine. Energy Management Drive (ActiveEnergy Management Drive).

[0033] AC motors used in the present invention can be used, for example, in top drive drilling systems as described herein, winch systems used in the oil and gas exploration industry, drive systems for large mining vehicles, excavation equipment, and many other applications requiring high torque and low speed power. The application aspect is applied. For the purposes of this application, a novel and unique top drive drilling system will be described in detail. It should be understood that the pre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A low speed alternating current motor having motor shaft speeds of about (300) is provided, and such motor has application in numerous industries and devices, such as, for example, in top drive drilling systems. Because of the low shaft speed, mechanical speed reduction equipment may not be necessary. In addition, the motor shaft may be hollow to facilitate the flow of fluid, such as, for example, drilling mud.

Description

technical field [0001] The present invention relates generally to low speed AC motors, and more particularly to low speed variable frequency AC motors for use in direct drive applications such as top drives. Background technique [0002] For many years, AC motors have been used as prime movers in industry. A typical AC motor is designed to run at speeds of 3,000 to 3,600 rpm or more. Many industrial applications and processes using AC motors must reduce the motor speed, usually through mechanical gearing, before the power provided by the motor can be used. In the petroleum field, for example, a conventional top drive drilling system may use a variable frequency AC motor as the prime mover. In particular, AC motors are used to provide the torque required to rotate the drill string and bit during drilling operations. The rotational speed of the drill bit and thus the top drive is relatively low, typically 100 to 300 rpm, more typically about 150 rpm. Conventional variable ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/32
CPCE21B19/16H02K1/20H02K1/30H02K1/32H02K7/003H02K7/14H02K9/04
Inventor K·R·威廉斯小阿尔维·E·霍华德D·F·迈克尼斯R·哈里斯R·布拉德利
Owner LETOURNEAU TECH DRILLING SYST