Largest diameter of bottom hole assembly

This allows the injector head 12 to handle jointed pipe or other jointed tubulars. Sign into or create your free personal account. The most common types are round slick and spiral grooved. In order to determine the location where transition from forward whirl to backward whirl and vice versa takes place and locations where slip is experienced, information gathered and computed from steps 2 and 3 is employed. More particularly, the invention relates to a method for determining the location and attitude of a bottom hole assembly BHA and the diameter of the borehole at the location of the measurement in a BHA.
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DIRECTIONAL DRILLING FOR GAS LINE SETS TWO RECORDS

Table shows weights of a common heavyweight pipe. The minimum radius through which coiled tubing should be deformed by the guide member is directly proportional to the diameter of the tubing. This limits the number of times that the large diameter tubing is coiled and uncoiled from the small diameter shipping reel, thereby minimizing the bending stress fatigue imposed on the tubing. When the vertically movable trolley is used for jointed tubular operations, the injector head can be raised above the working platform for all phases, and a movable mandrel can be used in the injector head for raising or lowering the jointed tubulars. The present invention is a universal apparatus and method for running jointed tubulars or coiled tubing into and out of a well, wherein the apparatus and method are suitable for running different diameters of tubulars and different types and sizes of bottom hole assemblies. The bottom hole assembly can be lowered into the lubricator, and the upper and lower lubricator valves are used to isolate the bottom hole assembly, or its external ports, to prevent escape of well bore pressure to atmosphere. Today, most wells are drilled using fixed-cutter bits.
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Bottom Hole Assembly | Ulterra

The frequency with which the collar center rotates about the borehole center is generally much higher than the rotation rate of the collar. The working reel has a support structure and spokes that collapse to a very low profile for shipping to the well site. Based upon all of the information gatherable using this method, the parameters of the drillstring or the drilling operation can be altered to optimize either the drillstring performance or the drilling operation. Notify me of follow-up comments by email. Apparatus and method for the dynamic measurement of a drill string employed in drilling. BHA'ss are typically feet to feet long.
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Jointed tubing can be handled with a crane according to currently known procedures, and coiled tubing can be handled with equipment described below. By comparing the graphic representation of FIGS. Thus, it is proven the collar is rotating in forward synchronous whirl. In addition to orientation and steering devices, some BHAs utilized for CTD are equipped with additional measurement tools, including gamma ray, casing collar locator, accelerometers shock load measurements , pressure internal and annulus and weight on bit. The BHA can include numerous sophisticated downhole tools to measure wellbore properties or to steer the assembly accurately, among other applications.
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