Abstract: A threaded joint for joining tubes used especially in the field of OCTG (Oil Country Tubular Goods), such as pipes in gas or oil production and/or casings when drilling wells can include a pin and a coupling, or box, having an end surface not facing against any surface of the pin when the joint is made-up. Following make-up of the joint, first sealing surfaces of the pin and box mate to form an internal metal-to-metal seal, and second sealing surfaces of the pin and box mate to form an external metal-to-metal seal, where the internal and external seals are defined by contact between one toroidal surface and one frusto-conical surface.

Abstract: The subject matter of this specification can be embodied in, among other things, a method that includes providing a first pipe having a first leading end and a first trailing end, providing a second pipe having a second leading end and a second trailing end, abutting at least a portion of the second leading end to at least a portion of the first trailing end to define a pipe abutment zone comprising a portion of the first pipe measured longitudinally from the first trailing end and a portion of the second pipe measured longitudinally from the second leading end, conveying the first and second pipe past an inspection device, inspecting by the inspection device a first portion of the pipe abutment zone and a second portion of the pipe abutment zone, and providing defect data that describes defects detected within the first portion and the second portion.

Abstract: Oil well pipe component comprising a threaded portion, at least part whereof is coated with a layer of a corrosion-inhibiting material, that has been applied to at least the part of the threaded portion of the oil well pipe component by means of a method comprising a cataphoresis step from an aqueous bath, said method comprising—providing the oil well pipe component comprising a threaded portion; —immersing at least part of the threaded portion of the pipe component in a cataphoresis bath comprising water and suspended particles of corrosion-inhibiting material, and provided with an anode and a cathode means, the pipe component being connected to the cathode means; —inducing a current through the bath, in order to provide the corrosion-inhibiting material with a positive charge; —depositing a layer of the positively charged corrosion-inhibiting material onto the pipe component; and—removing the immersed part of the pipe component with the layer of corrosion-inhibiting material from the cataphoresis bath and a

Abstract: The subject matter of this specification can be embodied in, among other things, a method that includes providing a first pipe having a first leading end and a first trailing end, providing a second pipe having a second leading end and a second trailing end, abutting at least a portion of the second leading end to at least a portion of the first trailing end to define a pipe abutment zone comprising a portion of the first pipe measured longitudinally from the first trailing end and a portion of the second pipe measured longitudinally from the second leading end, conveying the first and second pipe past an inspection device, inspecting by the inspection device a first portion of the pipe abutment zone and a second portion of the pipe abutment zone, and providing defect data that describes defects detected within the first portion and the second portion.

Abstract: Thread parameters for a threaded object are determined. Spatial reference systems (X, Y, Z) and (X?, Y?, Z?) are respectively identified for a position sensor and the threaded object. A transformation matrix describing a quadratic form representing the threaded object in (X, Y, Z) may be determined to relate the reference systems. For example, a sensor trajectory on the threaded object may be determined, along with measurement points on the threaded object. The measurement points may be selected so the matrix, evaluated on these values, has maximum rank. Position data at measurement points in the second reference system may be transformed into the first reference system, yielding first results. After coating the threaded object, position data at the measurement points may be acquired again and transformed into the first reference system, yielding second results. Comparisons between the first and second results may provide thickness of the coating and quality verification.

Abstract: Disclosed herein are embodiments of a drill pipe tool joint and a drill pipe which are optimized for repeated make-up/break-out operations without the use of screw grease. Embodiments of the disclosure are environment friendly as well as having improved operating efficiency. In particular, the box and pin can be formed from different materials having different hardness.

Abstract: A polymeric rod guide for a sucker rod, said polymeric rod guide having a body surrounding and coaxial with the sucker rod and molded in fixed contact with the rod. The body having a polygonal cross-section and a plurality of blades longitudinally disposed and extending from the body, each blade having a pair of planar longitudinal side walls and an exterior longitudinal edge, each of said blades having a first blade face disposed between a first terminal end of the blade and the exterior longitudinal edge and a second blade face disposed between a second terminal end of the blade and the exterior longitudinal edge, and an area of the body between the longitudinal side wall of a first blade and the longitudinal side wall of an adjacent second blade defines a trough having a plurality of planar surfaces.

Abstract: A sucker rod including a sucker rod body (122); a transition section (125) having an outer surface disposed circumferentially around the longitudinal axis of the transition section, the outer surface having a longitudinal profile comprising a continuous curve beginning at the cylindrical outer surface of the rod body and having a concave curved portion having a radius (RA) and a convex curved portion having a radius (RB), wherein RB is less than RA and a diameter of the transition section measured transverse to the longitudinal axis (AA) is continuously increasing with distance from the outer surface of the rod; a wrench square section (127) having at least four wrench flats (124); a pin shoulder section (128) having a pin shoulder face (126) adapted to contact an end of a coupling (117) the pin shoulder face having an outer diameter (DF); and a threaded pin connection section (129) having male threads.

Abstract: Threaded joint for pipes consisting of a male member (1) and a female member (2), which are provided on the outer and inner surfaces respectively with two threading portions presenting a lead-in flank ? such that 10°???25°, an abutment surface (9) being present at the end of said male member for abutment to a corresponding annular abutment surface (10) of the female member. The lead-in flanks of the male (1) and the female (2) members, upon make-up and with unloaded joint leave a gap (in the direction parallel to the axis (21) of the joint) varying from 0.01 to 0.12 mm. The internal and external diameters D3 and D4 (of the pipe portion not involved in the coupling with the female member) of said male member, the inner and outer diameters D1 and D2 of the abutment surface of the female member are linked by the relationship: (D22?D12)/(D42?D32)?0.5.

Abstract: Threaded joint for pipes consisting of a male member (1) and a female member (2), which are provided on the outer and inner surfaces respectively with two threading portions presenting a lead-in flank &bgr; such that 10°≦&bgr;≦25°, an abutment surface (9) being present at the end of said male member for abutment to a corresponding annular abutment surface (10) of the female member. The lead-in flanks of the male (1) and the female (2) members, upon make-up and with unloaded joint leave a gap (in the direction parallel to the axis (21) of the joint) varying from 0.01 to 0.12 mm. The internal and external diameters D3 and D4 (of the pipe portion not involved in the coupling with the female member) of said male member, the inner and outer diameters D1 and D2 of the abutment surface of the female member are linked by the relationship: (D22−D12)/(D42−D32)≧0.5.