1
H Bernie Luft, Graham Wilde, Peter J Pelensky: Insulated and/or concentric coiled tubing. BJ Services Company U, Nowsco Well Service, Sue Z Butler & Binion L Shaper, January 18, 2000: US06015015 (351 worldwide citation)

A coiled tubing composite comprising insulated coiled tubing, concentric coiled tubing and insulated concentric coil tubing, including structure with centralizers and providing an annulus for insulation. The invention includes a method for assembling concentric coiled tubing, with insulation, and ap ...


2
John G Misselbrook, David E Sask: Safeguarded method and apparatus for fluid communiction using coiled tubing, with application to drill stem testing. Nowsco Well Service, Sue Z Butler & Binion L Shaper, June 17, 1997: US05638904 (73 worldwide citation)

A safeguarded method and apparatus for providing fluid communication with coiled tubing, said coiled tubing comprising more particularly coiled-in-coiled tubing, having a inner tube and an outer tube, and including multicentric coiled-in-coiled tubing and its method of assembly, the safeguarded meth ...


3
Roderick L Shulver, John Misselbrook, Robert Standen: Screw thread protection. Nowsco Well Service, Leydig Voit & Mayer, September 15, 1987: US04692988 (26 worldwide citation)

A method of protecting mating screw threads at least under tightening torques is described in which a dry lubricant such as molybdenum disulphide is applied to one screw thread, and a liquid lubricant is applied to the other screw thread. The screw threads are then tightened to the required torque v ...


4
Gordon D Latos: Remote hydraulic pressure intensifier. Nowsco Well Service, Norman R Klivans, Skjerven Morrill MacPherson Franklin & Friel, July 4, 1995: US05429036 (17 worldwide citation)

A double acting reciprocating intensifier uses a single low pressure fluid stream as both the power supply and the source of fluid the pressure of which is to be intensified. The entire device, including flow paths, is confined within a compact cylindrical housing. Tandem drive pistons minimize oper ...


5
Stuart D Clouston, Paul S Goodwin: Method and apparatus for freezing large pipe. Nowsco Well Service, Sue Z Butler & Binion L Shaper, November 17, 1998: US05836167 (15 worldwide citation)

Apparatus and method for freezing large pipe plugs, including in particular subsea applications, wherein the apparatus includes a jacket adapted to encircle a section of large pipe, a recycling refrigeration unit having said jacket connected as an evaporation chamber and, for subsea applications, a ...


6
Richard J Dyer: Anionic compositions for sludge prevention and control during acid stimulation of hydrocarbon wells. Nowsco Well Service, Sue Z Butler & Binion L Shaper, April 22, 1997: US05622921 (15 worldwide citation)

This invention relates to anionic compositions, containing an alkyl aryl sulfonic acid or salt thereof, a nonethoxylated glycol and an acetylenic alcohol in an alkyl alcohol solvent, that have proved effective for controlling sludge and emulsion formation during acid stimulation and treatment of hyd ...


7
Sylvia K Pachla, Robert S Taylor, John R Delorey: Method of preventing precipitation of iron compounds during acid treatment of wells. Nowsco Well Service, Oliff & Berridge, November 12, 1991: US05063997 (11 worldwide citation)

The invention discloses a process for reducing sludging during acid treatment of an oil well by adding phosphinic acid or a soluble salt thereof and a source of cupric or cuprous ion. The addition of an iodide ion source to this combination aids its effectiveness in stronger acids.


8
Pachla Sylvia K, Taylor Robert S, Delorey John R: Traitement antiboues, Anti-sludging treatment. Pachla Sylvia K, Taylor Robert S, Delorey John R, Nowsco Well Service, GOWLING LAFLEUR HENDERSON, December 27, 1990: CA1278178 (7 worldwide citation)

ABSTRACT OF THE DISCLOSURE The invention discloses a process for reducing sludging duringacid treatment of an oil well by adding phosphinic acid or asoluble salt thereof and a source of cupric or cuprous ion. Theaddition of an iodide ion source to this combination aids itseffectiveness in stronger a ...


9
Misselbrook John G, Sask David E: Procede protege pour creer une communication fluidique a laide dun tube spirale, dispositif associe et application aux essais aux tiges, Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing. Nowsco Well Service, Nowsco Well Service, OSLER HOSKIN & HARCOURT, February 13, 1997: CA2167491 (6 worldwide citation)

A safeguarded method and apparatus for providing fluid communication with coiled tubing, said coiled tubing comprising more particularly coiled-in-coiled tubing, having a inner tube and an outer tube, and including multicentric coiled-in-coiled tubing and its method of assembly, the safeguarded meth ...


10
Latos Gordon D: Hydraulic pressure intensifier for drilling wells.. Nowsco Well Service, July 5, 1995: EP0661459-A1 (4 worldwide citation)

The present specification discloses a double acting reciprocating intensifier (10) which uses a single low pressure fluid stream as both the power supply and the source of fluid the pressure of which is to be intensified. The entire device, including flow paths, is confined within a compact cylindri ...