Triple C Minerals v. XTO Energy — Fifth Circuit upheld the lease because its Pugh clause did not expressly cover compulsory units

Case
Triple C Minerals, L.L.C. v. X T O Energy, Incorporated
Court
U.S. Court of Appeals for the Fifth Circuit
Judge
Stewart; Higginson; Ho
Date Decided
September 17, 2026
Docket No.
25-30741
Topics
Oil and Gas; Mineral Leases; Pugh Clauses; Compulsory Unitization
Source
Read the full opinion

Background

Triple C Minerals, L.L.C. was a lessor, and XTO Energy, Inc. was a lessee, under the Collins Lease, an oil, gas, and mineral lease covering Louisiana property. Paragraph 6 provided that the lease would remain effective after its primary term as long as production did not cease for more than 90 days. Although Tract 1 had experienced no production for at least 90 days, XTO maintained that production elsewhere continued the entire lease under Louisiana’s default rule of lease indivisibility.

The lease contained a Pugh clause providing that, after a specified period, operations on pooled units would not maintain the lease as to land outside those units. Tract 1 had been placed in a compulsory unit by the Louisiana Commissioner of Conservation. Triple C argued that this compulsory unitization triggered the Pugh clause, divided the lease, and caused the lease to terminate as to Tract 1 after 90 days without production.

The district court held that the Pugh clause did not apply to compulsory unitization and granted summary judgment to XTO. Triple C appealed.

The Court’s Holding

The Fifth Circuit affirmed. It held that, under Louisiana mineral-law principles, a Pugh clause must clearly and unequivocally express an intent to depart from the statutory presumption of indivisibility. The Collins Lease’s Pugh clause did not expressly state that it applied to compulsory units, so it could not be interpreted to release Tract 1 from the lease.

The court acknowledged that the Louisiana Supreme Court had interpreted similar pooling language to encompass compulsory units in another contractual context. But the more specific rule governing Pugh clauses controlled. The court also rejected Triple C’s reliance on extrinsic evidence and on Paragraph 7’s references to spacing rules and compulsory units, reasoning that the necessary intent had to appear clearly and unequivocally in the Pugh clause itself.

Key Takeaways

  • Under Louisiana law, a Pugh clause must clearly and unequivocally express an intent to overcome the default rule that a mineral lease is indivisible.
  • General references to pooling do not necessarily make a Pugh clause applicable to compulsory unitization.
  • References to compulsory units elsewhere in a lease do not substitute for express language in the Pugh clause itself.

Why It Matters

The decision underscores the need for precise drafting in Louisiana mineral leases. A lessor seeking tract-by-tract lease termination following compulsory unitization should ensure that the Pugh clause expressly covers compulsory units rather than relying on general pooling language.

For lessees, the ruling confirms that production from another portion of an indivisible lease can continue to maintain the entire lease unless the operative Pugh clause unmistakably provides otherwise.

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