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that regulate the pressure for the drive chain, stripper assembly, and various well-control components. 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. Once the connection has been properly terminated, the tube is then bent over a preset guide to create a reasonably smooth bend transition to the outer surface of the core drum. Load may be affected by several parameters other than the hang weight of the CT and include wellhead pressure, stripper friction, reel back tension, and the density of the fluids inside and outside the tubing. Load should be measured directly using a load cell that measures the tensile and compressive forces applied to the CT by the injector. Pressure integrity of this connection is typically maintained with the use of O-rings or other types of elastomeric seals on the OD of the CT body. The internal slip-type connection requires the use of a slip or grapple-type load ferrule placed within the ID of the tube body. Further stiffness of the legs is achieved by tightening the turnbuckles mounted beneath the leg sections. 16.6Typical CT injector-drive-chain system (courtesy of SAS Industries Inc.). At the present time, CT manufactured for well intervention and drilling application is available in sizes ranging from.750.500. Load may be defined as the tensile or compressive force in the CT just above the stripper and is one of the most important measurements needed for proper operation of the prescribed service.
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The pumps in these power packs provide source power for the injector, service reel, levelwind, well-control stack accumulators, console priority, and auxiliary panels as needed. Important parameters to proper weld-on connector design and application include: A gradually tapered insertion neck several inches up from a straight-wall section that continues to the weld-bead location ( Fig. 16.9Side view of typical CT service reel (courtesy of SAS Industries Inc.). The number of accumulator bottles typically ranges from one to six, depending on the size and pressure rating of the well-control stack in service. Service Reel, the service reel serves as the CT storage apparatus during transport and as the spooling device during CT well-intervention and drilling operations. The hydraulic fluid is discharged from the injector motors to the hydraulic reservoir tank at atmospheric pressure. The hydraulic fluid losses experienced through the injector motors are compensated by a charge pump incorporated into the closed loop circuit. The following connections have the capability of securing loads and pressure at the end of the CT in a manner that, during makeup, results in yielding of the tube body.
The code reduction animapro connector s straight-wall OD exceeds the ID of the CT by several thousands of an inch. When CT is retrieved from the wellbore, the hydraulic pressure in the reel motor circuit is increased, providing the torque needed to allow reel rotation to keep up with the extraction rate of the tubing injector. Changes in CT OD geometry also present problems when trying to install the connectors onto the. An additional utility of the slip rams is the ability to close onto the tube and secure movement in the event that well-pressure risks blowing the tubing out of the borehole. The fundamental operating concept of the counter-rotating, opposed-chain injector is one that utilizes drive chains fabricated with interlocking gripper blocks mounted between the chain links (. In all traction-loading systems, hydraulic cylinders are used to supply the traction pressure and subsequent normal force applied to the CT (. This flow-tee or flow-cross connection should be equipped with a minimum of two high-pressure isolation valves and rated to the same working pressure and nace classification as the well-control stack rams. The tool connection mechanically wedges the load ferrule onto the CT OD during connection makeup.
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