Slim-Hole and Coiled-Tubing Window Cutting Systems

Faure, A.M.; Elst, Herman van; Burge, Phil; Jürgens, Rainer

doi:10.2118/27654-ms

Cited by 2 publications

(1 citation statement)

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“…Cutting force of the bit head tooth surface is about 80% of total cutting force of the window bit. 25,26 Therefore, this article focuses on the cutting mechanical analysis by taking cylindrical cemented carbide teeth on the window bit head as an example.…”

Section: Working Mechanical Model Of the Window Bitmentioning

confidence: 99%

Research on cutting mechanics of window bit cutting teeth

Kong

Zheng

Zhang

et al. 2016

Advances in Mechanical Engineering

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According to structural characteristics of dual-effect strong side-cut window bit (hereinafter referred to as window bit) and the theory of metal cutting and the rule of teeth arrangement of window bit, a cutting mechanical model of window bit cutting teeth is established, window bit geometric equations deduced and the solution of the cutter cutting mechanical model completed; finally, the casing window experiment is conducted with the dual-effect strong side-cut window bit developed to verify the accuracy of the cutting mechanical calculation model and the simulation results. The results show that the variation tendency of the main cutting force of the bit and the experimental data are similar in the windowing process, the simulation results can accurately reflect the change rule of the main cutting force and the requirements of engineering applications are basically met. The research results of this article provide theoretical basis for the analysis and calculation of the cutting force of the window bit and can serve as a reference for the design of deep/ultra-deep well casing window bits and cutting mechanics research.

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Section: Working Mechanical Model Of the Window Bitmentioning

confidence: 99%

Research on cutting mechanics of window bit cutting teeth

Kong

Zheng

Zhang

et al. 2016

Advances in Mechanical Engineering

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Further Advances in Coiled-Tubing Drilling

et al. 1994

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The use of coiled tubing to drill horizontal reentry wells has received considerable interest in the industry over the last two years. The benefit of being able to drill at balance, safely and in a controlled manner, using nitrogen to reduce down hole pressure while drilling highly depleted reservoirs, provides an advantage over conventional techniques, particularly in reducing impairment to the formation. The paper describes such a horizontal re-entry drilled in the shallow depleted water flooded reservoir Barenburg in Northern Germany. The scope of work for this project included:Cutting a window through 6 5/8" and 9 5/8" casingDrilling a 5 7/8" medium radius curveRunning a 5" liner and a 5 1/2" parasitic string for nitrogen injectionDrilling a 4 3/8" horizontal using nitrogen to maintain a balanced conditionRun open hole logsRun 3 1 /2" slotted liner The entire program was executed with no intervention from a conventional rig or workover hoist. A special structure to be positioned over the well to support the coiled tubing injector head and to provide a work platform had to be constructed for this type of operation. A dedicated mast for lifting of pipe and down hole tools was placed on the substructure. The development of a surface controlled orienting tool and an adjustable motor provided excellent directional capabilities on a 2 3/8" coiled tubing. This program represents a significant extension of the capabilities of drilling with coiled tubing.

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Slim-Hole and Coiled-Tubing Window Cutting Systems

Cited by 2 publications

References 0 publications

Research on cutting mechanics of window bit cutting teeth

Research on cutting mechanics of window bit cutting teeth

Further Advances in Coiled-Tubing Drilling

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