Private equity (PE) firm Grey Rock Investment Partners has agreed to invest in Rebellion Energy Solutions, a Tulsa-based specialist in decommissioning legacy oil and gas wells.

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“Grey Rock believes there is an underserved market of opportunities in the oil and gas well remediation space to offer near term solutions for positive environmental impacts,” said Grey Rock’s Matt Miller, managing director.

Rebellion plans to use Grey Rock’s “committed capital to execute on its strategy of reducing methane emissions and mitigating environmental impacts” from orphan oil and gas wells and restoring impacted lands, the companies reported Thursday.

“The partnership with Grey Rock allows Rebellion to offer a full suite of services to work on behalf of landowners, communities, and the larger public to transform liabilities of the past into opportunities of the future,” said Rebellion CEO Staci Taruscio.

The companies did not report the size of Grey Rock’s investment.

Earlier this year, Grey Rock and a special purpose acquisition company chaired by former House Speaker Paul Ryan proposed forming a public Lower 48 exploration and production company focused largely on Permian Basin assets. The agreement was part of a wave of PE-driven “large multi-region deals for non-operated interests” during the second quarter.