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...Glossary:SAS Stand alone screen completion...
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...tating hydraulic motors. * Fig. 1--CT injector and typical well-control stack rig-up (courtesy of SAS Industries Inc.). Operation The fundamental operating concept of the counter-rotating, opposed-c...ing loads (tension or compression). * Fig. 2--Typical CT injector-drive-chain system (courtesy of SAS Industries Inc.). * Fig. 3--Typical CT gripper-block configurations (courtesy of ...SAS Industries Inc.). In all traction-loading systems, hydraulic cylinders are used to supply the trac...
The coiled tubing (CT) injector is the equipment component used to grip the continuous-length tubing and provide the forces needed for deployment and retrieval of the tube into and out of the wellbore. The injector assembly is designed to perform three basic functions: * Provide the thrust required to snub the tubing into the well against surface pressure and/or to overcome wellbore friction forces. Figure 1 illustrates a typical rig-up of a CT injector and well-control stack on a wellhead. There are several types of counter-rotating, chaindrive injectors working within the industry, and the manner in which the gripper blocks are loaded onto the tubing varies depending on design. These types of injectors manipulate the continuous tubing string using two opposed sprocketdrive traction chains, which are powered by counter-rotating hydraulic motors.
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... Petroleum Engineers Chapter 16 - Coiled-Tubing Well Intervention and Drilling Operations By Alex Sas-Jaworsky, II, ...SAS Industries., Curtis Blount, Conoco-Phillips, and Steve M. Tipton, U. of Tulsa ISBN 978-1-55563-114...-7 Get permission for reuse Fig. 16.1--Illustration of Bannister well-boring machine (courtesy of SAS Industries Inc.). Fig. 16.2--Well drilling apparatus (U.S. Patent No. 2,548,616) (after Priestman ...
The CT injector is the equipment component used to grip the continuous-length tubing and provide the forces needed for deployment and retrieval of the tube into and out of the wellbore. Figure 1.5--CT injector and typical well-control stack rig-up (courtesy of SAS Industries Inc.). The tubing guide arch assembly may incorporate a series of rollers along the arch to support the tubing or may be equipped with a fluoropolymer-type slide pad run along the length of the arch. The tubing guide arch should also include a series of secondary rollers mounted above the CT to center the tubing as it travels over the guide arch. The number, size, material, and spacing of the rollers can vary significantly with different tubing guide arch designs. For CT used repeatedly in well intervention and drilling applications, the radius of the tubing guide arch should be at least 30 times the specified OD of the CT in service. This factor may be less for CT that will be bend-cycled only a few times, such ...
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...s * Pipe rams (Fig. 1). * Fig. 1--Typical quad-ram well-control stack configuration (courtesy of SAS Industries Inc.). Blind rams The blind rams are used to seal the wellbore off at the surface whe...:Coiled-Tubing_Well_Intervention_and_Drilling_Operations Noteworthy papers in OnePetro Alexander Sas-Jaworsky and Ali Ghalambor 2002. Considerations For Conducting Coiled-Tubing Well-Control Operation...
The well-control stack system is a critical part of the coiled tubing (CT) unit pressure containment package and is composed of a stripper assembly and hydraulically operated rams, which perform the functions described next. For typical well-intervention service, the four ram compartments are equipped (from top down) with: * Blind rams * Tubing shear rams * Slip rams * Pipe rams (Figure 1). Figure 1--Typical quad-ram well-control stack configuration (courtesy of SAS Industries Inc.). The blind rams are used to seal the wellbore off at the surface when well control is lost. Sealing of the blind rams occurs when the elastomer elements in the rams are compressed against each other. For the blind rams to work properly, the tubing or other obstructions across the ram bonnets must be removed.
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...front view of a typical service reel. * Fig. 1--Side view of typical CT service reel (courtesy of SAS Industries Inc.). * Fig. 2--Front view of a typical CT reel (courtesy of ...SAS Industries Inc.). Contents * 1 Installation * 2 Service reel operation * 2.1 Reel brake * 2.2...
The service reel serves as the coiled tubing(CT) storage apparatus during transport, and as the spooling device during CT well-intervention and drilling operations.Figs. 1 and 2 show the side view and front view of a typical service reel. The inboard end of the CT may be connected either to the hollow segment of the reel shaft (spoke and axle design), or to a high-pressure piping segment (concave flange plates), both of which are then connected to a high-pressure rotating swivel. This high-pressure fluid swivel is secured to a stationary piping manifold, which provides connection to the treatment-fluid pumping system. As a result, continuous pumping and circulation can be maintained throughout the job. A high-pressure shutoff valve should be installed between the CT and reel shaft swivel for emergency use in isolating the tubing from the surface pump lines.
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...Ram * Glossary:ROV * Glossary:ROZ * Glossary:RS S * Glossary:SAR * Glossary:SARA * Glossary:SAS * Glossary:SIMOPs * Glossary:STOIIP * Glossary:STOOIP T * Glossary:TAC * Glossary:TDS * Glo...
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...etroleum Engineers Chapter 16 - Coiled-Tubing Well Intervention and Drilling Operations By Alex Sas-Jaworsky, II, ...SAS Industries., Curtis Blount, Conoco-Phillips, and Steve M. Tipton, U. of Tulsa Pgs. 687-742 ISBN ...onto drums for storage. * Fig. 16.1--Illustration of Bannister well-boring machine (courtesy of SAS Industries Inc.). The reeled drillstring system repeatedly used a bottomhole mud percussor and an o...
Numerous continuous-length tubular service concept trials and inventions paved the way for the creation of present day CT technology. The following discussion outlines some of the inventions and major milestones that directly contributed to the evolution of the continuous-length tubular products used in modern CT services. The origins of continuous-length, steel-tubing technology can be traced to engineering and fabrication work pioneered by Allied engineering teams during the Second World War. Project 99, code named "PLUTO" (an acronym for Pipe Lines Under The Ocean), was a top-secret Allied invasion enterprise involving the deployment of pipelines from the coast of England to several points along the coast of France.
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...of a CT unit is shown inFig. 1. * Fig. 1--Mechanical elements of a hydraulic CT unit (courtesy of SAS Industries Inc.). The basic components of a CT unit are: * Injector and tubing guide arch * Serv...
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. At present, the predominant equipment design for CT well-intervention and drilling services incorporates the vertically mounted, 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. A simplified illustration of a CT unit is shown inFigure 1. *
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...* Glossary:Sanding back * Glossary:Sandstone * Glossary:Sandy service * Glossary:SAR * Glossary:SAS * Glossary:Satellite field * Glossary:Satellite well * Glossary:Saturated Paste * Glossary:Satu...