RCD Locking Block System for Bearing Assembly Alignment
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Solution Overview
Problem
Existing rotating control devices (RCDs) in drilling operations require manual operation for locking the bearing assembly, which is dangerous and time-consuming, and existing mechanisms like ram and clamp mechanisms are inefficient and prone to misalignment, leading to potential safety hazards and operational inefficiencies.
Innovation Solution
A locking block system for RCDs that uses movable blocks with elastic components and hydraulic pressure to automatically lock and unlock the bearing assembly, eliminating the need for manual operation and ensuring proper alignment and safety through self-alignment features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation is used for locking the bearing assembly, then the operator can control the locking process, but it is dangerous and time-consuming
Solution Approach 1:
The locking block system automatically locks the bearing assembly to the RCD housing without requiring manual operation. The system uses self-aligning blocks that move into position to engage with the housing, eliminating the need for operator intervention and reducing locking time while maintaining safety.
Solution Approach 2:
The patent replaces manual mechanical operation with an automated mechanical system. The locking blocks are actuated by hydraulic or pneumatic forces rather than manual threading or clamping, substituting the operator's mechanical actions with an automated actuation system that is both faster and safer.
2Reliability
If ram mechanism is used for locking, then the bearing assembly can be locked securely, but it requires internal machine threads, threaded rod, and motor which increases complexity
Solution Approach 1:
The locking system is divided into multiple independent locking blocks distributed around the bearing assembly. Each block functions independently to provide secure locking, eliminating the need for a single complex centralized mechanism with threaded rods and motors. This segmentation simplifies the overall system while maintaining reliability.
Solution Approach 2:
The patent extracts and eliminates complex internal components such as machine threads, threaded rods, and motors from the locking mechanism. The locking blocks use direct engagement surfaces and elastic components instead, removing unnecessary complexity while preserving locking security.
3Reliability
If clamp mechanism is used for locking, then the bearing assembly can be locked, but it must be manually operated which is dangerous and time-consuming
Solution Approach 1:
The locking blocks automatically position themselves and engage with the RCD housing without requiring manual operation. The system uses self-aligning features that guide the blocks into the correct position, eliminating the need for operator intervention while maintaining reliable locking capability.
Solution Approach 2:
The patent uses hydraulic or pneumatic actuation to move the locking blocks into position and engage them with the housing. This replaces manual clamping operations with an automated fluid-powered system that is both safer and faster while maintaining reliable locking.
4Reliability
If existing locking mechanisms are used, then the bearing assembly can be locked, but misalignment can occur leading to safety hazards
Solution Approach 1:
The locking blocks feature asymmetric geometry with specific engagement surfaces designed to align with corresponding features on the RCD housing. This asymmetric design ensures proper alignment during the locking process, preventing misalignment hazards while maintaining reliable locking function.
Solution Approach 2:
The locking blocks include self-aligning features that guide them into the correct position before final engagement. This preliminary alignment action ensures that the blocks are properly positioned before locking forces are applied, eliminating misalignment risks.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a safer and more efficient locking mechanism that automatically locks the bearing assembly, preventing misalignment and reducing operator risk, while ensuring proper alignment and prolonged component life by eliminating the need for manual actuation and active locking.
Implementation Method 1
at least one elastic component situated between the housing and the movable block, and configured to automatically bias the movable block in the locked position
Implementation Method 2
upon supplying hydraulic fluid pressure via the valve device, the movable block moves to the unlocked position
Data Source
AI summary
A system for locking a bearing assembly to a rotating control device (RCD) housing is provided. The RCD housing can be coupled to a blowout preventer, and the bearing assembly can be received within the housing, and can comprise a stationary bearing housing having a perimeter channel. A plurality of locking block assemblies are each supported by the housing and are operable between a locked position and an unlocked position. Each locking block assembly comprises a movable block configured to interface with the perimeter channel when in the locked position, and at least one elastic component is situated between the housing and the movable block. The at least one elastic component is configured to automatically bias the movable block in the locked position. Upon supplying fluid pressure via a valve device, the movable block moves to the unlocked position and the at least one elastic component compresses to facilitate removal of the bearing assembly from the RCD housing. Associated systems and methods are provided.