You must log in to edit PetroWiki. Help with editing

Content of PetroWiki is intended for personal use only and to supplement, not replace, engineering judgment. SPE disclaims any and all liability for your use of such content. More information

Coiled tubing equipment design

Jump to navigation Jump to search

There are several coiled-tubing (CT) equipment manufacturers presently marketing various designs of CT injectors, service tubing reels, and related well-control equipment in the industry today. The injector designs available within the industry include:

  • The opposed counter-rotating design
  • Chaindrive system
  • Arched-chain roller drive
  • Single-chain opposed-gripper-drive system
  • The sheavedrive system

Equipment design for CT

At present, the predominant equipment design for CT well-intervention and drilling services incorporates the vertically mounted, counter-rotating chaindrive type of injector. For purposes of practical demonstration, the following descriptions of CT equipment focus on the specific unit components supporting the vertical, counter-rotating chaindrive type of injector.

The CT unit is a portable, hydraulically powered service system that is designed to inject and retrieve a continuous string of tubing concentric to larger-inside diameter (ID) production tubing or casing strings. At the present time, CT manufactured for well intervention and drilling application is available in sizes ranging from 0.750 to 3.500 in. outside diameter (OD). A simplified illustration of a CT unit is shown in Fig. 1.

The basic components of a CT unit are:


Noteworthy papers in OnePetro

R.E. Frishmuth and J.C. Pursell 1996. Design, Construction, and Use of a Coiled Tubing Drilling Structure for Onshore and Offshore Operations, Offshore Technology Conference, 6 May-9 May 1996. 8228-MS.

Robert Ewen, Kevin Mackay, and Frank Shepard 2001. Development of Computer-Controlled Hybrid CT Drilling Units, SPE/ICoTA Coiled Tubing Roundtable, 7-8 March 2001. 68440-MS.

External links

See also