In the fall of 2006 the Snubco Group introduced Coil Tubing units to augment its current fleet of service equipment and well control services. The Snubco Group added 2 new Coil tubing units capable of depths of 4000 m. One unit will carry 1 ½ “(38.1mm) coil tubing while the other will be outfitted with 1 1/4’” (31.75mm) coil tubing. Both coil tubing units will be capable of running tubing up to 50.8 mm. The Coil tubing units will have 10,000 psi BOPs, electronic recording for depths and ability to track pipe fatigue. The smaller unit will have a crane mounted on the trailer and have a Hydra rig model 635 injector capable of pulling 35,000 pounds. The second unit is a trailer with a separate 26 ton rear mounted crane unit with Hydra rig model 660 injector capable of pulling 60,000 pounds.
Coil tubing units are used for performing well bore cleanouts, spotting stimulation fluids accurately in the well bore, the running, setting and pulling of bridge plugs or inflatable packers, milling and velocity strings.
Coil tubing is a long continuous spool of tubing which can be ran or pulled from a live well and enables the operator the ability to pump fluids or inert gases at the same time as the string is being moved. The ability to pump at the same time the string is being moved makes Coil Tubing an excellent operation for performing well bore clean outs.
Coil Tubing Equipment
Intermediate/Deep Coil Units:
Snubco uses a two-truck coiled tubing system for operations where the coil tubing has to be run into deeper wells or where large diameter coil tubing is required. One truck consists of the coiled tubing unit, while the support truck is equipped with the crane and tools. This allows long lubricator lengths to be run in order to house long bottom hole assemblies without requiring a separate long reach crane. Coiled tubing sizes vary from 31.8 mm (1 ¼ inches) to 50.8 mm (2 inches), and injectors have 15,500 to 35,500 daN of pull. All units are equipped with state-of-the-art recording and modeling system including real-time software. This modeling software allows real time well parameters to be entered with the proposed coil tubing specifications to ensure safe working limits of all well bore equipment.
Intermediate/Deep Coil Units:
Snubco’s intermediate-depth coil units use a single-truck designed for working on shallow to medium depth wells. The rear mounted 20 tonne picker is on the same truck as the coil tubing component, thus allowing for ease of operations and unit maneuverability on small or crowded location.
Conventional Coiled Tubing Unit Specifications
Control Cabin: Electric/Hydraulic controls. Real time data acquisition and fatigue analysis of tubing. Analog/Digital readouts of data analysis
Tubing Work Reels: Various 31.8 – 50.8 mm auxiliary tubing reels.
BOP System: NACE spec designed. 70 MPa wellhead working pressure (78 mm bore). Nitrogen pressured accumulator for hydraulic backup supply. Remote BOP control system. Class I, II, and III wellhead configuration under new AEUB regulations.
Tubing Injectors: Up to 35, 000 daN pulling capability. 31.8– 50.8 mm tubing sizes. 2440 mm arch radius. Infinite depth rate control. NACE spec stripper assembly with 70 mPa working pressure.
Picker Truck: 21 m boom reach
Features: Capable of traveling on 75% road bans with additional reel trailer. Snap latch between injector and BOP. Trailer mounted coiled tubing unit consisting of control cabin, interchangeable tubing reels, accumulator and BOP system, interchangeable tubing injectors and picker truck.
Intermediate Coiled Tubing Unit Specifications
Control Cabin: Electric over hydraulic controls. Real time data acquisition and fatigue analysis of tubing. Analog/Digital readouts of data acquisition.
Tubing Work Reels: 3100 m of 38.1 mm tubing. 4200 m of 31.8 mm tubing.
BOP System: NACE spec designed. 70 MPa wellhead working pressure. Hydraulic accumulator system with nitrogen backup supply. Remote BOP control system. Class I, II, and III wellhead configuration under AEUB regulations.
Tubing Injectors: 15, 500 daN Pull/Snub capability. 25.4 mm – 50.8 mm tubing size range.1830 mm arch radius. Infinite depth rate control. NACE spec stripper assembly with 70 MPa working pressure.
Care: 20 ton National 600B. 360º continuous rotation.
Features: Capable of traveling 75% road bans with additional reel trailer. Snap latch between injector and BOP. Trailer mounted coiled tubing unit consisting of control cabin, interchangeable tubing reels, accumulator and BOP systems, interchangeable tubing injectors and 20 ton crane.