A system for use in corrosive environments includes a first tubular including a first connector portion, and a second tubular including a second connector portion. The first connector portion overlaps the second connector portion to form a connection joint. A magnesium element is arranged between the first connector portion and the second connector portion at the connection joint.

A threaded joint is constructed of a pin and a box. The pin includes, in order from an end of the pin toward the tubular body: a first male threaded portion, a first sealing surface, a shoulder surface, a second sealing surface, and a second male threaded portion. The box includes a first female threaded portion, a first sealing surface, a shoulder surface, a second sealing surface, and a second female threaded portion. A length from a boundary of the first sealing surfaces to a position of the shoulder surfaces and a length from a boundary of the second sealing surfaces to a position are each at least 15 mm, and the total length which is a sum of the length and the length is at least 50 mm. Thus, the threaded joint is capable of providing excellent sealing performance.

A seal-off fitting for a conduit system includes a conduit body defining an inner cavity, at least one conduit port adapted to receive a conduit, and at least one threaded sealing port. The seal-off fitting further includes a threaded seal-off cover engageable with the sealing port, a first coating applied to at least a portion of the conduit body, and a second coating applied to at least of portion of the seal-off cover. At least a portion of the threads of the sealing port and at least a portion of the threads the seal-off cover remain uncoated, with the uncoated threads of the sealing port and the uncoated threads of the seal-off cover defining a flame path for flue gases exiting the conduit body.

A composition for solid coating formation, includes a mixed solvent including water and a dipolar aprotic solvent, a powdery organic resin which is partially soluble at least in the dipolar aprotic solvent. The powdery organic resin is dissolved or dispersed in the mixed solvent.

A composition for solid coating formation, includes a mixed solvent including water and a dipolar aprotic solvent, a powdery organic resin which is partially soluble at least in the dipolar aprotic solvent. The powdery organic resin is dissolved or dispersed in the mixed solvent.

The invention concerns a threaded portion of a tubular element for a threaded tubular connection having an axis of revolution, the portion comprising a threading extending over its outer or inner peripheral surface, and a first sealing surface on the peripheral surface, the first sealing surface being capable of producing metal-metal interference with a corresponding second sealing surface belonging to a complementary threaded portion. The threading and the first sealing surface are coated with a metallic anti-galling layer wherein zinc (Zn) is the major element by weight, the metallic anti-galling layer being at least partially coated with a lubricant layer comprising a resin and a dry solid lubricant powder dispersed in the resin.

Enclosures are described that encapsulate or surround a joint between two or more elements, for example two pipes or a pipe and a valve. The enclosures prevent direct contact between the joint and the surrounding water, for example fresh or salt water, and prevent biofouling and corrosion of the joint. An enclosure encapsulates the joint and forms an enclosed space around the joint. Some or all of the enclosure includes a flexible material. The enclosed space is filled with a protective liquid that is retained in the enclosed space and that will be in direct contact with the joint. Due to the flexible nature of the flexible material, the pressure inside the enclosed space is maintained substantially equal to the exterior pressure outside the membrane.

A protector for a connection for a tubular component for drilling or operating hydrocarbon wells, provided with a distal end surface, the protector comprising an annular housing comprising a bottom, two lateral walls, outer and inner, separated from each other and in which an annular gasket is disposed, each lateral wall comprising a bottom lateral wall portion and an exterior lateral wall portion and an upper face, the two exterior lateral wall portions defining an opening with width A.sub.u and characterized in that a distance A between two bottom lateral wall portions is greater than the width A.sub.u, in a manner such as to allow a first annular gasket to be positioned then to allow said annular gasket to be retained in the annular housing.

A fastener for connecting a coated conduit to a fitting comprises: a locking nut having a first end, a second end, and internal threading extending between the first end and the second end; a gasket formed at the first end of the locking nut by coating the locking nut with a polymeric material; and a flexible sleeve extending from the second end of the locking nut that is formed by coating the locking nut with the polymeric material. The internal threading of the locking nut is threaded onto exposed threading of the coated conduit such that the flexible sleeve fits over a circumference of the coated conduit and the gasket forms a sealed connection with the fitting when the exposed threading of the coated conduit is connected to the fitting.

A cover for a tubular having at least one threaded region. The cover has an inner sleeve having a closed end and an open end and formed of a fluid absorbent material. The inner sleeve is positionable about the threaded region of the tubular. The cover further has an outer sleeve having a closed end and an open end and formed of fluid resistant material. The outer sleeve is disposed about the inner sleeve.