Interface Coiled Tubing Load Cells
September 26, 2013
Coil tubing load cells are used for measuring the insertion force of small diameter (typically 0.5 to 4.5 inch) stainless steel tubing that is inserted into the borehole / wellbore at the wellhead. A borehole is any hole drilled for the purpose of exploration or extraction of natural resources such as water, gas or oil where a well is being produced. The coil tubing (CT) is usually installed when the well, which has been drilled, is deemed ‘viable’ and will produce the natural resource in a productive and economic manner. Coil tubing provides intervention allowance of vertical, horizontal, highly deviated, and live wells(1). Adding the coil tubing allows prolonged fluid extraction (and/or insertion) from/to the wellbore. Note: Wellbore is often used interchangeably with drill hole or borehole, though typically "borehole" is referred to in ore mining, exploratory drilling, pilot holes for installing piers or underground utilities, or any other of a number of single use hole drilling(2).
Coil tubing is forced into the wellbore via a “coil tubing injector head” in the field or offshore – an insertion process which has been used for decades, with typical insertion rates at 50 to 100 feet-per-minute.
Figure 1 Coil tubing truck carrying a large spool of 2" tubing with the injector head (right side). Courtesy Stewart and Stevenson Inc. 2013
Figure 2. Borehol
Posted October 10, 2013