Coiled Tubing Jarring Device Ring Valve Fluid Seal
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Solution Overview
Problem
Current jarring devices for coiled tubing in oil well-bore operations are insufficient in generating strong enough jarring impacts to overcome frictional resistance, as they suffer from fluid leakage during loading, reducing the effectiveness of the striking mechanism.
Innovation Solution
A jarring device with a braking assembly featuring a ring valve made of Aluminum-Bronze alloy, which completely blocks fluid flow through a restricted segment, utilizing compressible fluid and a sliding assembly to generate enhanced resistance and forceful impacts by expanding and sealing the fluid flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If fluid pressure is used to generate jarring impact in known devices, then the device can produce striking force, but fluid leakage reduces the resistant force and weakens the jarring impact
Solution Approach 1:
The harmful fluid leakage path is eliminated by extracting the braking assembly as a separate functional component with a ring valve that actively blocks the restricted segment. This separates the fluid containment function from the general housing structure, allowing precise control to prevent pressure loss while maintaining the useful jarring impact function.
Solution Approach 2:
The ring valve acts as an intermediary element between the fluid chamber and the restricted segment. It mediates the fluid flow by selectively blocking or allowing passage based on the operational phase, preventing harmful leakage during loading while enabling necessary fluid movement during impact release.
2Stability of the object's composition
If friction fittings are used to hold equipment together, then equipment stability is improved, but separation requires overcoming strong frictional resistance
Solution Approach 1:
The jarring device applies periodic impact forces to the stuck equipment assembly. Each impact cycle compresses the fluid, blocks leakage with the ring valve, and releases sudden pressure to create a striking force that progressively overcomes the static friction holding the equipment together, eventually achieving separation.
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 device produces more forceful impacts by maintaining fluid resistance during loading and sudden drops in pressure, allowing the knocker and mandrel to accelerate and collide effectively, overcoming frictional forces and improving the separation of stuck equipment.
Implementation Method 1
The fluid chamber has an upper chamber, a lower chamber, and a restricted segment between the upper chamber and the lower chamber... when there is an influx of compressed fluid into the channels, the body of the ring expands and seals the flow of fluid through the restricted segment
Implementation Method 2
the ring valve further includes at least three channels on each of its edges, where the channels extend into the ring and terminate inside the ring... when there is an influx of compressed fluid into the channels, the body of the ring expands and seals the flow of fluid through the restricted segment
Data Source
AI summary
A jarring device for a coiled tubing of an oil well-bore is disclosed. A sliding assembly of the jarring device which is slideable within a barrel assembly includes a mandrel and a knocker. The barrel assembly comprises a fluid chamber. The fluid chamber includes an upper chamber, a restricted segment and a lower chamber. Further, a braking assembly is attached to the sliding assembly. The braking assembly includes a ring valve made of an alloy belonging to Aluminum-Bronze family of copper alloys, and which is capable of expanding when exposed to pressure. When the braking assembly is moved into restricted segment, and the fluid within the fluid chamber is compressed, flow of fluid through the restricted segment gets blocked due to expansion of the ring. When the braking assembly exits the restricted chamber, a sudden drop in pressure causes the knocker and/or the mandrel to strike the barrel assembly and generate a powerful jarring impact and shock wave.