... Introduction Coil tubing conveyed production logs were obtained from four high angle and two horizontal wells in the Norman Wells oilfield during September 1990. Five wells were producers and one was an injection well. Coil tubing systems have seen increasing use in the past five years due...

... of these plugs extended for300 m (1000 ft) in the vertical well bore and tubing in the wells describedherein. To remove these plugs a conventional high pressure pump (69 MPa (10,000psi)) was coupled to a conventional 32 mm (1–1/4 inch) coil tubing unit towhich a special jet drill head was welded. That drill head...