10 results about "Drilling riser" patented technology

The utility model belongs to the technical field of marine drilling riser detection, and particularly relates to a traction device for marine drilling riser detection, which comprises a workbench, a main support platform and an auxiliary support platform, and the main support platform and the auxiliary support platform are arranged above the workbench and are connected through a traction structure. A clamping mechanism is arranged on the main supporting platform; the clamping mechanism comprises a left clamping unit and a right clamping unit; the left clamping unit comprises sliding grooves, an air cylinder and a clamping plate, the two sliding grooves are formed in one side of the main supporting platform, the air cylinder is arranged in the sliding grooves, and the output end of the air cylinder is connected with a sliding block. According to the traction device for detecting the marine drilling riser, the traction structure adopts a mode that the motor drives the threaded rod to rotate, the auxiliary supporting platform is driven to do accurate linear motion relative to the main supporting platform, accurate traction and positioning of the riser are achieved, and the accuracy and efficiency of detection or transportation are improved.

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.

The invention discloses an aluminum-based composite material for a deep sea drilling riser as well as a preparation method and application of the aluminum-based composite material. The preparation method comprises the following steps: S1, uniformly mixing aluminum alloy powder and AlCoCrFeNi high-entropy alloy powder through a tank mill; s2, the mixed powder is subjected to ball milling; s3, the ball-milled powder is dried and then put into a graphite mold to be subjected to cold pressing treatment, then vacuum sintering is conducted, and the sintering heating process comprises the steps that the temperature is increased to 250 DEG C within 150 minutes, and heat preservation is conducted for 1 hour; then the temperature is increased to 350 DEG C within 90 minutes, and heat preservation is conducted for 1 hour; raising the temperature to 450 DEG C within 90 minutes, and keeping the temperature for 1 hour; finally, the temperature is increased to 550-650 DEG C within 90 minutes, heat preservation is carried out for half an hour, cooling is carried out, and an aluminum-based composite material initial product is obtained; and S4, the aluminum-based composite material initial product is heated to 450 + / -10 DEG C for multi-pass rolling, the total deformation is controlled to be 20-80%, and the aluminum-based composite material for the deep sea drilling riser is obtained. The aluminum-based composite material prepared through the method has excellent compressive strength and corrosion resistance, and the service requirements of deep sea drilling riser and other extreme environments are met.

This invention provides an experimental method for the parametric response of a coupled system of an offshore platform-riser-subsea wellhead, belonging to the technical field of riser systems. This method uses the configuration parameters of an actual offshore drilling riser system as a basis, and determines the parameters of the similarity ratio, model material, and structural dimensions based on similarity theory and truncation design theory. The various devices are fastened together using flanges and bolts. The heave amplitude and frequency of the six-degree-of-freedom excitation platform and the drilling fluid circulation device are adjusted to control the drilling fluid flow rate and pressure within the riser string. Multiple sets of metal strain gauges are attached to different positions on the riser string, and a three-part force meter is installed at the top and bottom of the riser system. By analyzing and processing the collected data, this method can solve the problem of unclear mechanisms affecting the parametric excitation vibration of the pressure-controlled drilling riser coupled system under complex loads.

The invention discloses a top hydraulic tensioning type drilling riser system suitable for a cylindrical floating deepwater dry platform, which comprises a production riser system, a tensioning system, a wellhead connecting system and an underwater isolation barrier system, the production riser system comprises a flow divider, a telescopic joint, an overwater blowout preventer, a platform moon pool structure and a single drilling riser, the single drilling riser is of a hollow tubular structure, the flow divider, the telescopic joint, the overwater blowout preventer, the tensioning system, the platform moon pool structure and the top of the single drilling riser are sequentially connected, and the bottom of the single drilling riser is connected with an underwater wellhead through the wellhead connecting system and the underwater isolation barrier system. Based on an overwater blowout preventer mode, a huge, overweight and high-cost underwater blowout preventer does not need to be used, then the deepwater drilling operation cost is reduced, and through combined use of the overwater blowout preventer and the underwater isolation barrier system, the drilling operation safety is effectively improved, and the operation risk is reduced.

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.

The utility model discloses an ocean engineering drilling riser installation device, and relates to the technical field of riser installation. The device comprises a first supporting ring and a second supporting ring, symmetrically-distributed guide rails are fixedly installed on the outer side of the first supporting ring and the outer side of the second supporting ring, the outer sides of the guide rails are movably sleeved with movable plates, and a first supporting pipe is fixedly installed at one end of each movable plate; first fixing holes are formed in the four corners of the first supporting pipe correspondingly, two sets of symmetrically-distributed fixing rods are fixedly installed on the outer side of the first supporting ring and the outer side of the second supporting ring correspondingly, and the outer sides of the fixing rods are movably sleeved with moving plates. Through the arrangement of the first supporting pipe and the second supporting pipe, the connecting position and other parts of the vertical pipe can be supported, the stability of the vertical pipe is improved, pressure borne by the outside is reduced, and the service life of the vertical pipe is prolonged.