Haynes and Boone, L.L.P.

Haynes and Boone, L.L.P. boasts a deep bench of experienced oil and gas litigators who handle a wide range of complex, high-value disputes across the upstream, midstream, and downstream sectors. The team is adept at managing contentious matters, including royalty disputes, breach of contract, joint operating agreement conflicts, title and lease disputes, horizontal drilling issues, midstream litigation, and environmental contamination claims. With strong experience before state, federal, and appellate courts, the firm represents energy companies as both plaintiffs and defendants. The practice is co-led by Houston-based David Ammons, who represents onshore and offshore producers in multidistrict and class action cases, particularly involving joint operating agreements and title disputes, and The Woodlands, Texas-based Craig Stahl, who brings over three decades of experience leading complex, high-stakes oil and gas litigation. Houston-based Michael Mazzone focuses on environmental and toxic tort cases, while Houston-based Garrett Martin specializes in mass and class royalty actions. Houston-based D.J. Beaty focuses on upstream disputes, and Houston-based Jeffrey Kuehnle handles complex technical litigation, including lease termination and development issues.