Swivel Pressure Head Integration for High-Pressure Wellbore Fluid Introduction
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Solution Overview
Problem
Conventional swivel systems in the petroleum industry face limitations in introducing fluids under high pressure while rotating tubular members, often requiring separate components for rotation and fluid introduction, which can be inefficient and restrictive in deep or distant wellbore operations.
Innovation Solution
The high-pressure swivel pressure head design, comprising an upper and lower housing, a pressure sleeve, locking nut, and packing assembly, allows for the introduction of fluids under pressure through a fluid inlet, with a fixation mechanism that prevents relative rotation between housings and enables efficient fluid sealing, enabling higher pressure applications and integration with swivel motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional swivel systems are used, then separate components are required for rotation and fluid introduction, but this increases device complexity and reduces operational efficiency
Solution Approach 1:
The patent combines the swivel mechanism and pressure head into a single integrated assembly. The pressure head includes an upper housing, lower housing, and pressure sleeve that are connected to the swivel mechanism, allowing fluid introduction and rotation to occur simultaneously through one unified component rather than requiring separate devices.
Solution Approach 2:
The integrated swivel pressure head performs multiple functions: it provides rotational capability through the swivel mechanism while simultaneously enabling high-pressure fluid introduction through the pressure sleeve and packing assembly. This multi-functional design eliminates the need for separate rotation and fluid introduction components.
2Stress or pressure
If conventional swivel systems are used, then high-pressure fluid introduction is limited, but this restricts applicability in deep wellbore operations
Solution Approach 1:
The pressure head is divided into distinct segments: an upper housing, lower housing, and pressure sleeve. This segmentation allows each component to be optimized for high-pressure resistance while maintaining overall structural integrity. The packing assembly is separately positioned to provide sealing without compromising the pressure-containing structure.
Solution Approach 2:
The pressure head utilizes composite construction with the upper and lower housings and pressure sleeve formed from high-strength materials capable of withstanding high-pressure conditions. This composite approach enables the system to achieve both high-pressure capability and adaptability for deep wellbore operations.
3Stability of the object's composition
If a fixation mechanism is added to prevent relative rotation between housings, then structural stability is improved, but device complexity increases
Solution Approach 1:
The fixation mechanism is integrated into the housing structure itself rather than being a separate external component. The upper and lower housings are designed with interlocking features that prevent relative rotation while maintaining a compact, unified structure that does not significantly increase overall device complexity.
Data Source
AI summary
A swivel pressure head includes a fixation mechanism detachably securing an upper housing to a lower housing. The upper housing includes an internal bore extending from a fluid inlet to an opening on a bottom surface of the upper housing. The lower housing includes a central bore. A pressure sleeve is disposed within the internal bore of the upper housing and within the central bore of the lower housing. A locking nut operatively engages the pressure sleeve and is configured to engage a swivel stem so that rotation of the swivel stem rotates the pressure sleeve. A packing assembly positioned in the internal bore of the upper housing fluidly seals between a wall of the internal bore and an outer surface of the pressure sleeve to direct a fluid flow from the internal bore of the upper housing through a fluid inlet and an internal bore of the pressure sleeve.