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Title: Coiled tubing operations and services

Abstract

Coiled tubing offers many advantages over conventional jointed tubing used for drilling in oil fields, including time savings, pumping flexibility, fluid placement, reduced formation damage and safety. The article gives an overview of coiled tubing history and development. Operating concepts are explained, along with descriptions of the major equipment and components associated with coiled tubing use in the oil field today.

Authors:
 [1]
  1. (Conoco Inc., Houston, TX (US))
Publication Date:
OSTI Identifier:
5605025
Alternate Identifier(s):
OSTI ID: 5605025
Resource Type:
Journal Article
Resource Relation:
Journal Name: World Oil; (United States); Journal Volume: 212:11
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; DRILLING; PIPES; OIL FIELDS; EQUIPMENT; GEOLOGIC DEPOSITS; MINERAL RESOURCES; PETROLEUM DEPOSITS; RESOURCES 020300* -- Petroleum-- Drilling & Production

Citation Formats

Jaworsky, A.S. II. Coiled tubing operations and services. United States: N. p., 1991. Web.
Jaworsky, A.S. II. Coiled tubing operations and services. United States.
Jaworsky, A.S. II. Fri . "Coiled tubing operations and services". United States. doi:.
@article{osti_5605025,
title = {Coiled tubing operations and services},
author = {Jaworsky, A.S. II},
abstractNote = {Coiled tubing offers many advantages over conventional jointed tubing used for drilling in oil fields, including time savings, pumping flexibility, fluid placement, reduced formation damage and safety. The article gives an overview of coiled tubing history and development. Operating concepts are explained, along with descriptions of the major equipment and components associated with coiled tubing use in the oil field today.},
doi = {},
journal = {World Oil; (United States)},
number = ,
volume = 212:11,
place = {United States},
year = {Fri Nov 01 00:00:00 EST 1991},
month = {Fri Nov 01 00:00:00 EST 1991}
}
  • This article outlines the minimum safety requirements that should be considered for onshore and offshore oil well service operations with coiled tubing equipment. These guidelines comply with Minerals Management Service (MMS) regulations issued on May 31, 1988, for offshore work. Where specific MMS regulations are sited, the regulation reference, Incident of Non-Compliance (INC), number is provided. These guidelines can be used by operators and contractors, and although U.S. offshore operations are emphasized, they are applicable wherever coiled tubing services are used.
  • Operations involving sand or solids washing are the most common of today's coiled tubing workover services. Wellbore cleanouts require pumping fluid that will entrain solids and return them to the surface. In most cases, wash fluids and solids are captured in surface tanks of sufficient volume to allow solids to settle out. Where practical, fluids are recirculated to reduce cost. An important concern when designing sand wash programs is correct fluid system selection. Wash fluids should closely balance BHP and provide piston like displacement for solids removal. This paper is an overview of compressible and incompressible fluids commonly used formore » coiled tubing services.« less
  • This article offers an overview of developments in commercial coiled tubing for oil wells including continuous coiled pipe manufacturing and production. Pipe behavior under various stresses and forces encountered during typical workover operations is addressed.
  • This paper reviews three industry authority's views on developments that will impact coiled tubing equipment and techniques for conventional land locations, Arctic and harsh offshore environments. Examples which are provided include the development of high-strength steels, composite pipe, integral lift devices, abrasive jet drilling, and extended reach drilling. It discusses the application of coiled tubing to well completion and maintenance, including the applications to plugged pipelines. The use of new steels and alloys help increase the corrosion resistance of the drilling stem along with greater load-bearing capacity. The economic advantages of coiled drilling versus jointed tubing drilling is somewhat moremore » questionable as the cost for downhole motors and directional tools remain prohibitively high and borehole diameters remain small.« less
  • Sand production can severely impact well performance and profitability by damaging production equipment or plugging wellbores. Sand control in existing wells may be required because of inadequate initial completion design, recompletion to new intervals or changes in reservoir production characteristics. The most durable and reliable sand control is by conventional gravel packing, but in some cases, conventional packs may not be economic or feasible. Improvements in coiled tubing technology and reliability have resulted in better application and increased acceptance of through-tubing sand control. Concentric gravel packing and sand consolidation are being used more because of advances in equipment, services, downholemore » tools and fluids. Candidates for these techniques include conventional completions that begin producing sand and wells with gravel pack failures. Economical jobs have been performed successfully in several different wellbore configurations. Some initially non-gravel packed wells are now being designed for possible through-tubing gravel packing, anticipating sand production later in the completion's producing life. This paper reviews the general procedures for installing a through-tubing, washdown mechanical gravel pack using coiled tubing conveyance and placement techniques.« less