Oil water well hydraulic expanding tube reshaping and renovation tools

An oil-water well and hydraulic technology, applied in wellbore/well components, earth-moving drilling, etc., can solve problems such as large vibration, low casing success rate, and shaping tools stuck by deformed well sections, and achieve large axial force. , the effect of significant economic benefits

Inactive Publication Date: 2008-05-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing casing shaping method is mechanical shaping. The tools used include pear-shaped expansion pipe, roller device and shock shaper. Due to the limited gravity of the pipe string, it can only be used for shaping small casings, or for casings that are not seriously deformed. The power of casing shaping is low, and it is easy for the shaping tool to be stuck by the deformed well section and cause engineering problems. The problem of accidents, and because the vibration is too large, it is easy to damage the casing cementing and affect the service life of oil and water wells

Method used

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  • Oil water well hydraulic expanding tube reshaping and renovation tools

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Embodiment Construction

[0008] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0009] Among the figures: 1 is an anchor, 2 is a hydraulic pusher, and 3 is a split tube expander. That is, the embodiment of the present invention is composed of an anchor 1, a hydraulic pusher 2, and a split tube expander 3. Upper joint. The connecting threads of the anchor 1, the hydraulic pusher 2, and the split tube expander 3 are drill pipe threads.

[0010] The function of the anchor 1 is to support the shaping pipe string and bear the hydraulic reaction force during shaping. The upper and lower joints of the anchor adopt the drill pipe thread commonly used in the oil field, which is convenient to connect with the drill pipe. The anchor body can be connected in series in multiple stages to provide more reliable and firm support.

[0011] There are hydraulic cylinders and plungers on the hydraulic pusher 2, which are used to generate downward axial thru...

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Abstract

The invention relates to a reshaping repairing instrument for an oil-water well hydraulic pressure expanded tube, comprising an anchor, a hydraulic pressure propeller and a split tube expander; wherein, the lower part of the anchor is connected with the upper part of the split tube expander, the lower part of the hydraulic pressure propeller is connected with the upper part of the split tube expander. The connecting screw thread of the anchor, the hydraulic pressure propeller and the split tube expander are drill rod screw threads. The hydraulic pressure propeller has the increasing pressure action and supplies big axial force, the radial force produced by the split tube expander is also large so as to reshape the big sleeve and the serious deforming sleeve; the reshaping does not produce vibration, and does not destroy the cementing of the casting string, does not affect the service life of the oil water well, thus the invention has the advantages of remarkable economic benefit.

Description

1. Technical field [0001] The invention is an oil-water well workover tool in an oil field, in particular a hydraulic expansion tube shaping repair tool for an oil-water well. 2. Background technology [0002] The existing casing shaping method is mechanical shaping. The tools used include pear-shaped expansion pipe, roller device and shock shaper. Due to the limited gravity of the pipe string, it can only be used for shaping small casings, or for casings that are not seriously deformed. The power of casing shaping is low, and it is easy for the shaping tool to be stuck by the deformed well section and cause engineering problems. The problem of accidents, and because the vibration is too large, it is easy to damage the casing cementing and affect the service life of the oil-water well. 3. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of existing shaping tools, and design a hydraulic expansion pipe shaping and repai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/10
Inventor 李玉坤卜凡俭李博李瑞勇曹来庆李晓峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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