Branched Poly(Hydroxyacid) Downhole Tool Members for Faster Degradation

The patent changes the molecular architecture parameter from linear to branched structure. This structural parameter change significantly accelerates the degradation rate while maintaining biodegradability. The branched structure creates more chain ends and increases surface area exposure to water, facilitating faster hydrolysis and thickness reduction.

The patent creates a composite polymer system by combining poly(glycolic acid) units with poly(lactic acid) units in a copolymer structure. This composite approach leverages the synergistic degradation properties of both polymer types, achieving faster thickness reduction rates while maintaining complete biodegradability in the downhole environment.

The patent implements a disposable downhole tool concept where the entire tool is constructed from biodegradable polymers. After completing its function, the tool automatically degrades in situ through hydrolysis and microbial action, eliminating the need for costly and time-consuming retrieval operations. This transforms the tool from a permanent component to a temporary, self-destructing device.

The downhole tool performs self-service by automatically decomposing itself after use. The biodegradable polymer material inherently contains the degradation mechanism within its molecular structure, requiring no external intervention for removal. The tool self-digests through hydrolytic cleavage and microbial degradation, converting itself into harmless byproducts that can be naturally disposed of in the formation.

The patent applies the disposable tool concept by using biodegradable polymers that eliminate retrieval costs entirely. The tool is designed to be cheap enough to leave in the formation, as its automatic degradation eliminates all removal expenses. This transforms the economic model from expensive permanent tools requiring retrieval infrastructure to inexpensive temporary tools that self-eliminate.

The patent converts what would traditionally be considered waste (the discarded tool) into a beneficial process. The degradation of the tool material releases breakdown products that can serve as nutrients for formation microorganisms, potentially stimulating microbial activity that benefits hydrocarbon production. The 'harm' of leaving a tool in the formation becomes the 'benefit' of controlled biodegradation and potential formation stimulation.