Modular Pipe Running Tool With Dynamic Fluid Swivel
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Solution Overview
Problem
Conventional casing installation tools are limited in their ability to efficiently grip pipes both internally and externally, and they operate at relatively low rotational rates due to hydraulic swivel seal limitations, which hampers the speed and efficiency of pipe string assembly and installation operations in well drilling.
Innovation Solution
A modular pipe running tool that can quickly switch between internal and external gripping modes by changing modular components, featuring a dynamic fluid swivel that isolates high control fluid pressures, allowing for higher rotational rates and longer seal life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional pipe running tools use hydraulic swivel seals for rotation, then they can maintain seal integrity, but they are limited to low rotational rates
Solution Approach 1:
The tool separates the hydraulic control system from the rotating gripping assembly using a modular design. The hydraulic swivel seal is isolated in a stationary control section, while the gripping assembly with internal or external gripping elements rotates independently. This segmentation allows high-speed rotation of the gripping section without compromising the hydraulic seal integrity.
Solution Approach 2:
A modular intermediary coupling mechanism connects the stationary hydraulic control section to the rotating gripping assembly. This intermediary allows torque and control fluid transmission while accommodating high-speed rotation without requiring the hydraulic seal to rotate, thereby extending seal life while enabling higher rotational rates.
2Adaptability or versatility
If pipe running tools are designed for internal gripping, then they can grip pipe internally, but they cannot grip pipe externally without redesign
Solution Approach 1:
The pipe running tool incorporates a universal modular gripping assembly that can be configured for either internal gripping or external gripping. The gripping section includes interchangeable elements that allow the same basic tool structure to perform both internal and external gripping functions, eliminating the need for completely different tool designs.
Solution Approach 2:
The tool features dynamically reconfigurable gripping elements that can be quickly swapped or adjusted between internal and external gripping modes. This dynamic reconfiguration capability allows the tool to adapt to different pipe running requirements without permanent modification to the basic tool structure.
3Productivity
If specialized casing crews and equipment are used for pipe string assembly, then pipe can be installed, but it requires many personnel and equipment on the rig floor
Solution Approach 1:
The invention extracts the complex hydraulic control and gripping functions into an integrated modular pipe running tool that can be operated with fewer personnel. By consolidating the hydraulic swivel seal, modular gripping assembly, and control mechanisms into a single operable unit, the tool reduces the need for multiple specialized crew members and equipment on the rig floor while maintaining high installation rates.
Data Source
AI summary
A modular pipe gripping assembly has a universal actuator assembly having a control fluid swivel. An external pipe gripping assembly can be attached to the actuator assembly for gripping the external surface of a section of pipe. Alternatively, the external pipe gripping assembly can be quickly and easily removed and replaced with an internal pipe gripping assembly for gripping the internal surface of a section of pipe. Control fluid pressure is trapped within the actuator assembly, but relieved from a fluid swivel, permitting high speed rotation of the modular pipe gripping assembly and preserving swivel seal life.