COILED TUBING FRICTION REDUCER

摘要

A tubing friction reducer (32) is mounted on a length of tubing within a bore hole. The friction reducer (32) comprises a cylindrical body (34) having a first section and a second section hingedly secured (40) around an exterior surface of the coiled tubing (18), the cylindrical body (34) having an outside diameter of an adjacent bore surface. A plurality of ball bearings (88) are positioned on and extending outwardly from the cylindrical body (34) extending in a generally axial direction along the cylindrical body (34) for the purpose of reducing friction between the coiled tubing (18) and the bore surface generated upon contact between the coiled tubing (18) and the bore surface. Retaining mechanisms such as collapse springs (92) are included for securing the ball bearings (88) to the cylindrical body (34). The tubing friction reducers (32) are placed along the tubing (18) at intervals to either minimize injector force or prevent buckling and tubing failure due to wear.