Rotating Control Housing with Threaded Riser Jumper Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotating control devices for marine risers in offshore drilling lack a jumper mechanism that effectively connects and adjusts the penetration depth of male couplings within female couplings, particularly in deep water offshore operations, where the existing designs do not unambiguously disclose nipples of reduced outer diameter coupled to port sections and lower riser flanges, and lack a threaded nut for depth adjustment.
Innovation Solution
A rotating control device housing with upper and lower riser flanges, a latch section, a first nipple of reduced outer diameter, a port section with an outlet for fluid discharge, a second nipple of reduced outer diameter coupled to the lower riser flange, and a jumper connecting the flanges, along with a male coupling featuring a threaded nut for adjusting penetration depth within a female coupling, which includes a seal bore for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing rotating control device designs are used, then the basic fluid communication function is provided, but the penetration depth of male couplings within female couplings cannot be adjusted
Solution Approach 1:
The patent applies the dynamics principle by introducing a threaded nut that enables adjustable penetration depth of the male coupling within the female coupling. This allows the connection depth to be dynamically modified according to operational requirements, transforming a fixed-geometry connection into an adjustable one, thereby resolving the contradiction between adaptability and structural complexity.
2Reliability
If standard couplings are used without reduced diameter nipples, then the connection is simple, but the fluid flow efficiency and sealing performance are insufficient
Solution Approach 1:
The patent applies the local quality principle by incorporating reduced diameter nipples at specific locations within the coupling structure. These nipples create localized flow paths that enhance fluid flow efficiency and sealing performance without requiring complete redesign of the entire coupling system, thus improving reliability while limiting the increase in overall structural complexity.
3Stability of the object's composition
If male coupling penetration depth is not adjustable, then the device structure remains simple, but the stability of fluid communication during riser deployment is compromised
Solution Approach 1:
The threaded nut mechanism enables dynamic adjustment of male coupling penetration depth, allowing optimization of fluid communication stability during different phases of riser deployment. This dynamic capability ensures stable fluid communication by permitting depth adjustment to compensate for dimensional variations and operational conditions, while keeping the adjustment mechanism relatively simple.
4Productivity
If reduced outer diameter nipples are not used, then the manufacturing is simpler, but the fluid flow diversion and discharge efficiency are reduced
Solution Approach 1:
The reduced outer diameter nipples create localized flow paths that improve fluid flow efficiency for diversion and discharge operations. By concentrating flow through these reduced diameter sections, the system achieves better flow control and efficiency without requiring complex manufacturing processes for the entire coupling structure, thus balancing productivity improvement with ease of manufacture.
Data Source
AI summary
A rotating control device housing (60) includes an upper riser flange (65f); a lower riser flange (65m); a latch section (62) for receiving a bearing assembly and connected to the upper riser flange; a port section (63) connected to the latch section by a flanged connection, having an outlet for discharging fluid flow diverted by the bearing assembly, and connected to the lower riser flange; and a jumper (27j) connected to the upper and lower riser flanges.