Coil tubing is metal piping, usually within the range of 1″ to 3.25? in diameter. Their use is for intervention in the oil and gas industry, where they are applied to oil and gas wells. Other times, they are used as production tubing in cases of depleted gas wells, spooled on a big reel.
Coil tubing is metal piping, usually within the range of 1″ to 3.25? in diameter. Their use is for intervention in the oil and gas industry, where they are applied to oil and gas wells. Other times, they are used as production tubing in cases of depleted gas wells, spooled on a big reel. Coil tubing tools include Grapple, Casing scraper, Packers, Pump-out plug with catcher, Selective isolation tools, Shear subs, Anchors and others.
Typically, a coiled tubing operation is done by means of the drilling on oil rig platform, and is used in supporting the surface equipment. However, a self supporting tower may be applied or used on platforms that have no drilling tools. For sub-sea wells coiled tubing operations, there is need to use a semi-submersible in order to provide support for every surface equipment as well as personnel. On the other hand, wireline can be performed from a relatively small and low-cost intervention vessel. Onshore, coil tubing can be run utilizing service rigs that are smaller. A self-contained mobile coil tubing rig can be used for a light operation.
Coil Tubing Tools
Shear Sub: this coil tubing tool offers a way of emergency disconnect using a straight pull force. The tool features different sections or areas. The compensator section obstructs vibration from negatively impacting the shear screws when used with a motor. The piston sections of the shear sub are structured to stop pressure differential from producing force toward separation. The design of these coil tubing tool features adjustable shear value, torque transmitting, internal fishing neck, vibration resistant as well as pressure balance.
Packers: Packers are among the coil tubing tools used in oil wells. Through-tubing inflatable packers with coiled tubing is an attractive alternative technique to applications that need workover rig, particularly where correct, selective fluid placement is crucial for attaining job success.
Onshore Light Coiled Tubing Unit
With a coil tubing unit, anything that a traditional service rig is capable of doing can also be done (tripping jointed pipe is not inclusive). The unit is a self-contained machine that provides multi-use. Typically, there are two types in shallow service ? the Picker and Arch. The Arch makes use of a vertical elevator alongside a horsehead on top; there?s also an injector that hangs by winch line off it. The Picker unit features a picker, alongside a horsehead bolted straight to the injector.
This category of coil tubing units feature large air compressor as well as permanent drum mounted. In natural gas wells where there is lower pressure and no hydrocarbons, air is blown to bottom hole in the natural gas wells using the compressor. The purpose is to clean fluid and mud out of the wellbore and perforations. On the other hand, carbon dioxide or nitrogen is best suited for this purpose in higher pressure oil wells; not just being best suited, it is also the safer technique to use.
Coil tubing tools are used in variety of applications; they can be either hydraulic or mechanical. Specifically, the tools are designed for coil tubing. They enable pump-through capability as well as high loads.