5 results about "Drilling riser" patented technology

A rotation control device for pressure controlled drilling, the rotation control device comprising:-a housing comprising a central circular portion having an opening extending therethrough, where the housing comprises a recess located near a top edge thereof; the groove defines an upper edge, a lower edge and a side wall located between the upper edge and the lower edge; -a sealing assembly adapted to be securely and detachably inserted within the opening of the housing and defining a bore sized for insertion of a drill string therethrough wherein the sealing assembly is configured to seal around the drill string and isolate an annulus of the drilling riser; -a boltless seal assembly securing system comprising: o at least one boltless sector adapted to be inserted into a groove located on the housing, each of the at least one boltless sector comprising a shape adapted to fit within the groove and having an outer surface, an inner surface, a top surface and a bottom surface; the outer surface is suitable for abutting against the side wall of the groove, the lower surface is suitable for abutting against the lower edge of the groove, and the top surface is suitable for abutting against the upper edge of the groove; o a boltless segment holder comprising a top surface adapted to be fixed on the top edge of the housing and a lower edge adapted to be inserted into the housing opening and abut against an inner surface of the at least one boltless segment; wherein the at least one boltless segment is inserted into the groove and then the boltless segment holder is secured to the at least one boltless segment, sufficient to secure the seal assembly within the housing.

The invention discloses a method for predicting dynamic characteristics of a drilling riser in an ultra-deep water free standing mode, which comprises the following steps of: establishing a two-dimensional coordinate system by taking a submarine blowout preventer as an original point, and establishing a fluid infinitesimal and riser infinitesimal mechanical equilibrium equation according to the Alembert principle; in consideration of environmental loads generated by waves, ocean currents and wind and buoyancy generated by a buoyancy barrel on the top of the riser, a classical bent beam theory is adopted to deduce a transverse differential equation of the riser in the ultra-deep water free standing mode, boundary conditions of a dynamic behavior prediction model of the riser in the ultra-deep water free standing mode are determined, and a finite element method is adopted to predict the dynamic behavior of the riser in the ultra-deep water free standing mode. An equation is solved by combining a Newmark-beta integral method, a dynamic behavior prediction model of the marine riser in the ultra-deep water free standing mode is finally established, and the dynamic characteristic behavior of the marine riser in the mode can be clearly predicted.

A drill string system for a riser includes a first part of the riser configured to connect to a first section of the riser, a second part of the riser configured to connect to a second section of the riser, and a chamber closure connection. The chamber closure connection includes a first part configured to connect to the first part of the riser and comprising a first coupling element, and a second part configured to connect to the second part of the riser and comprising a second coupling element. The chamber closure connection is configured to adjust between a locked and an unlocked configuration.

The application belongs to the technical field of drilling riser and discloses a modularized drilling riser capable of being quickly spliced, which comprises a water pipe body, an upper flexible joint is arranged on the upper end of the water pipe body, and a lower flexible joint is arranged on the lower end of the water pipe body, a multi-section water pipe body structure is arranged, and a buoyancy section is detachably arranged between the adjacent two sections of the water pipe body, the first connecting ring of the water pipe body is butted with the second connecting ring of the buoyancy section, the toothed rubber ring between the first connecting ring and the second connecting ring is engaged, at the moment, the two half rings of the clamp are combined, the annular groove formed in the inner side of the clamp is wrapped outside the first connecting ring and the second connecting ring, the slope rubber ring in the annular groove is abutted with the first connecting ring and the second connecting ring, and the corrosion-resistant sealing ring maintains the sealing property of the connection between the single section of the water pipe body and the buoyancy section.

The application discloses a kind of drilling riser self-adaptive locking and sealing threaded joint, including outer threaded joint, inner threaded joint, outer threaded section, inner threaded section, second threaded section, inner threaded section stepped locking threaded section and outer threaded section stepped locking threaded section;Outer threaded joint and inner threaded joint are connected, the outer threaded joint is provided with outer threaded section, inner threaded joint is provided with inner threaded section, the outer threaded section of outer threaded joint and the inner threaded section of inner threaded joint are connected, second threaded section is arranged in the axial middle section of inner threaded section, and inner threaded section stepped locking threaded section is arranged on second threaded section, and outer threaded section stepped locking threaded section is correspondingly provided at the junction of outer threaded section and inner threaded section stepped locking threaded section.Processing is simple by the way that multiple stepped locking threaded structures are uniformly distributed along the circumference of pipe body, site assembly is easy to control, anti-reversal effect is immediate, and additional installation of anti-reversal pin block and non-metallic sealing ring and other structures is not needed.