Double-concentric controllable-speed cutter using abrasive jets

An abrasive jet cutting and eccentric cutting technology, applied in wellbore/well components, earth-moving drilling and other directions, can solve the problems of difficult processing, complex structure, driving failure, etc., and achieve the effect of improving the efficiency of jet cutting

Inactive Publication Date: 2015-10-28
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This tool can be used for jet cutting of small-sized casing or tubing, but the tool has a complex structure and is difficult to process, especially for the power drive system, which needs to connect several variable diameter joints and embed them in the spiral groove to connect with the upper and lower pipe coils , any failure or leakage of the reducer will cause the drive to fail

Method used

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  • Double-concentric controllable-speed cutter using abrasive jets
  • Double-concentric controllable-speed cutter using abrasive jets
  • Double-concentric controllable-speed cutter using abrasive jets

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention will be further described:

[0021] Depend on figure 1 combine figure 2 Shown: a double eccentric controllable speed abrasive jet cutter, including eccentric cutting nozzle 1, four eccentric nozzles 2, main shaft 3, outer shell 4, thrust bearing 5, friction speed limiting ring 8 and pressure shell 9; continue to combine image 3 and Figure 4 As shown: the main spindle 3 is a hollow shaft, the left end of which is provided with a tapered pipe thread 31 for connecting the eccentric cutting nozzle 1, the middle part is provided with a keyway and a thrust bearing 5 is fixed, and a sealing protection is provided on the outside Outer shell 4, its right end is provided with coaxial disc structure 34 and is covered with sealing protection pressure housing 9, also has the through hole 33 that communicates with its central hole on the main spindle on the left side of disc structure 34, disc The structure ...

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Abstract

The invention discloses a double-concentric controllable-speed cutter using abrasive jets and solves the problem that an existing cutter is complex in structure and difficult to process. The cutter comprises a cutting nozzle, eccentric spouts, a main mandrel, an outer shell, a friction speed-limiting ring, and a pneumatic shell. The cutter is characterized in that the a pore axis of each spout mounting channel is mutually perpendicular to the axis of the cutting nozzle and has an offset distance e relative to the cutting nozzle, and an axis of a straight cylindrical segment of a pore of each spout and the axis thereof intersect to form an eccentric angle alpha; the main mandrel and the pneumatic shell are provided with corresponding sector openings, respectively, so that flow area is periodically changed during a rotation of the main mandrel, pressure is periodically changed, and speed monitoring is achieved; in addition, whether to mount the friction speed-limiting ring or not and whether to use the eccentric spouts to precisely control nozzle speed or not can be selected according to different displacements. The cutter is available for cutting in a string having an inner diameter 62mm and is controllable in speed, high in cutting efficiency, low in manufacturing cost and simple in structure.

Description

technical field [0001] The invention relates to a hydraulic jet cutting tool. Background technique [0002] Northeast Petroleum University Liu Jubao and others designed a "closed hydraulically driven adjustable speed cutter for tubing strings of Φ73mm and above (patent number: 201210346765.1)", which divides cutting tools into speed regulating system, power drive system and injection system Three parts, the speed control system is a disc brake mechanism formed by dynamic friction plate, static friction plate and spring mechanism, and the power drive system is driven by several variable diameter joints in two power tubes coiled on the shaft. Variations change the differential pressure, and several resulting couples form a dynamic moment that drives the tool to rotate and the cutting head to rotate. This tool can be used for jet cutting of small-sized casing or tubing, but the tool has a complex structure and is difficult to process, especially for the power drive system, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/06
Inventor 李治淼刘巨保姜奇壮徐世博兰乘宇陈淑艳
Owner NORTHEAST GASOLINEEUM UNIV
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