The term “coiled tubing” means a set of durable CT strings (CGT), a complex of surface equipment, consisting of the coiled tubing unit itself (providing tripping of the CT string – Tripping pipe procedures), and a complex of equipment, including a mud pump, compressors for injecting inert gas or a booster unit, a generator inert …
This Topic provides information on Coiled Tubing Pressure Control Equipment (surface ) commonly used to maintain the integrity of the well during CT operations (BOP) including Quad, and Combi types. Coiled tubing well control equipment is designed to allow safe well intervention services to be performed under pressure. However, well pressure should be kept to …
The Power Pack or Power Unit supplies hydraulic power to the coiled tubing equipment unit. Most conventional units use a diesel engine (examples are Scania DN14 and Detroit 8V71 engines) to power hydraulic pumps, which in turn drive the hydraulic motors in the injector head, tubing reel, and well control systems. The engine is independent …
Coiled tubing is stored on large reels in the same manner as the flexible cable of a wireline unit. It is in essence a storage drum, designed to store the entire tubing string, and is an integral part of the CT Unit. These reel’s capacities come in sizes ranging from approximately 5000 to 25000 feet. …
The injector head is the mechanism that transfers the force necessary to inject, retract or hold the coiled tubing with precision control while tripping into/out of the well (check pipe tripping guide). It is the main item in the coiled tubing unit and comprises the following two parts: The Injector Drive The Tubing Guide (Gooseneck) …
Desanders and desilters (Figure 1) are secondary solids control equipment used in oil and gas drilling rigs (check also: types of drilling rigs) that use hydrocyclones. They operate using the centrifugal force created by injecting fluid tangentially at high speed, these exaggerate the differences in settling speed of different size particles of the same density. …
Milling is the process of steel removal. Such milling may be mandatory in a lot of cases while drilling oil and gas wells after trials of fishing operations. It will also result in a removal of the steel obstruction in the wellbore and continue drilling to the well target. Milling Applications In Drilling: Milling is …
When the mud is in a static condition, the rheological properties should prevent solids (weighting material and drilled formation solids) from settling. The relevant property in this respect is the mud’s gel strength. The drilling mud gel strength is caused by the interactive forces between colloids (e.g., clay particles), polymer radicals, or emulsion droplets in …
In general, whatever job you perform on the drilling rig, you will need to know how the drilling process is managed, supervised, and completed. Who is in charge? And who can permit the stopping of operations? Who can authorize you to visit the rig floor (Check also Drilling Rig Components)? What is the drilling rig …
Most formation solids can be removed by mechanical means at the surface as shale shaker screens. Small particles are more difficult to remove and have a greater effect on drilling fluid properties than large particles. The particle size of drilled solids incorporated into drilling fluid can range from 1 to 250 microns (1 micron equals …