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Motor-driven adjustable centralizer

A motor-driven, centralizer technology, which is applied in drilling equipment, earthwork drilling, drilling pipes, etc., can solve the problems of single diameter of centralizer centralization, inconsistent centralization time, difficulty in lowering, etc., and achieves good centralization effect and simple structure , the effect of convenient operation

Active Publication Date: 2019-01-04
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of existing casing centralizers, such as the single centralizing diameter of the centralizer, inconsistent centralization time and difficulty in lowering, etc., and to provide a casing with simple structure, low price and convenient operation centralizer

Method used

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Embodiment Construction

[0021] According to the accompanying drawings, the motor-driven adjustable centralizer mainly consists of a central tube, a motor retaining ring, a motor, a motor shaft, a threaded post, a threaded post end cap, a synchronous ring, a push rod base, a push rod, Composed of threaded arcs, track arcs, centralizing rods, slotted cylindrical head screws, etc., it is characterized in that the motor drives the threaded column to rotate by energizing the motor in the underground casing centralizer, and the threaded column is on a pair of adjacent sides Rotate on the thread, so as to convert the rotary motion of the threaded column into a linear motion, and the linear motion converted by the threaded column will push the centralizing rod to rotate outwards, thereby realizing casing centralization; the track arcs have a total of six pieces, and the six pieces The orbital arcs are evenly arranged outside the central tube along the circumferential direction, and their inner circumference c...

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Abstract

The invention discloses a motor-driven adjustable centralizer used in petroleum development industry. The motor-driven adjustable centralizer comprises a center tube (1), motors (3), motor shafts (4),threaded columns (5), synchronous rings (7), pushing rods (9), thread arc pieces (10), track arc pieces (11), centralizing rods (12) and slotted cylindrical head screws (17). Power is energized to the motors (3) in an underground casing centralizer, the motors (3) drive the threaded columns (5) to rotate, the threaded columns (5) rotate on adjacent pair of side threads (19), thus rotation motionof the threaded columns (5) is converted into linear motion, linear motion converted from the threaded columns (5) can push the centralizing rods (12) to rotate outwards to realize casing centralizing. The motor-driven adjustable centralizer has the advantages of simple structure, low cost and novel idea, the synchronous rings (7) ensure the central position of the casing, the centralizing effectis better, and the well cementation quality is improved advantageously.

Description

technical field [0001] The invention relates to the technical field of downhole tools in oil and gas fields, and relates to an adjustable centralizer driven by a motor. Background technique [0002] In order to ensure that the underground oil and gas resources can quickly flow back to the surface, it is necessary to create a stable flow path from the bottom of the well to the wellhead, and at the same time prevent other underground substances from polluting the oil and gas resources, and these tasks are usually achieved by cementing. [0003] In the cementing operation of horizontal wells and extended reach wells, there are many factors that affect the cementing quality, among which the casing centering degree is one of the key factors; the main function of the casing centralizer is to ensure the casing centering degree in the wellbore , so that the cement between the casing and the well wall is firmly bonded to ensure good cementing quality; traditional casing centralizers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10
CPCE21B17/1078
Inventor 黎伟蒋少玖邹星舒晨旭邓琅夏杨陈曦李配胡亚军
Owner SOUTHWEST PETROLEUM UNIV
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