Abstract: There is disclosed a threaded joint for coupling together rods, tubes, pipes etc. The joint consists of helical box and pin thread segments each defined by a pressure flank and a clearance flank spaced apart from each other with alternating roots and crests. The pressure flank is defined by an S-curve extending between the root and the crest, which is defined by a first curvature c1 adjacent to the root and a second curvature c2 adjacent to the crest. c1 and c2 curve in opposing directions with an inflection point “i” between curvatures c1 and c2.

Abstract: The application relates to a threaded cylindrical member, which may be used for a segmented drilling tube. The member has opposing first and second ends and a central axis between the ends. The first end is threaded with a pin thread including a pressure flank, a crest and a root. The second end is threaded with a box thread including a pressure flank, a root, wherein the pin and box threads are configured whereby when threaded together a portion of the root of the pin thread is out of contact with the crest of the box thread to leave gap therebetween. The secondary geometries of the pin and box threads are configured to generate an interference fit between the pin and box threads. The roots and crests of the pin and box threads define parallel tapering conical frustrums that differ from each other in their taper angles.

Abstract: The invention relates to a threaded cylindrical member, which may be used for a segmented drilling tube. The member has opposing first and second ends and a central axis between said ends. The first end is threaded with a pin thread comprising a pressure flank, a crest and a root. The second end is threaded with a box thread comprising a pressure flank, a root, wherein said pin and box threads are configured whereby when threaded together a portion of the root of said pin thread is out of contact with the crest of said box thread to leave gap therebetween. The secondary geometries of the pin and box threads are configured to generate an interference fit between the pin and box threads. The roots and crests of the pin and box threads define parallel tapering conical frustrums that differ from each other in their taper angles.

Abstract: A drilling fluid is provided that comprises a non-ionic or cationic polymer having general formula I or II. The drilling fluid may be used in drilling or other oilfield operations to prevent or limit the accretion of hydrocarbons to metal components when these are in contact with highly viscous hydrocarbons such as those present in formations containing heavy crude oil or tar sand.

Abstract: A method of drilling a bore hole is described. A desiccant is added to a Hydrocarbon Based Fluid (Crude Oil—Refined Oil—Diesel Fuel—Mineral Oil—etc.) used as a drilling fluid to drill bore holes (Oil and Gas Wells—Mine Shafts—etc.) to react with any water (H2O) present to generate a water free fluid. Several advantages result from accomplishing the water removal process including higher drilling rates, lower fluid preparation and maintenance costs, lower drilling fluid pumping costs, improved solids removal from the drilling fluid at the surface, improved bore hole conditions and improved environmental cleanup of the drill solids waste.