After nearly three years of litigation in the Western District of Texas, SWM International, LLC and DynaEnergetics Europe GmbH together with DynaEnergetics US, Inc. jointly stipulated to dismiss all claims with prejudice under Federal Rule of Civil Procedure 41(a)(1)(A)(ii). Filed on August 3, 2021, and closed on July 1, 2024, the case centered on U.S. Patent No. US11078762B2, which covers downhole perforating gun technology, and DynaEnergetics’ DS Gravity™ perforating gun system alleged to infringe it. Each party agreed to bear its own costs, expenses, and attorneys’ fees—a resolution that signals a negotiated settlement rather than a litigated verdict.

This case carries significant strategic weight for IP professionals operating in the oil and gas services sector, where perforating gun technology is fiercely contested. The mutual cost-bearing stipulation and dismissal with prejudice suggest a confidential business resolution, making it a critical reference point for patent holders and implementers alike when evaluating licensing postures, litigation risks, and freedom-to-operate exposure around downhole perforation systems.

Case Overview

The Parties

The Patent at Issue

U.S. Patent No. US11078762B2 (application No. US16/293508) covers innovations in downhole perforating gun systems used in oil and gas well completions. These systems are deployed deep within wellbores to create perforations in casing and surrounding rock formations, enabling hydrocarbons to flow into the well. The patent’s claims relate to specific structural and functional configurations of such gun systems that improve performance, reliability, or safety during perforation operations.

• • US11078762B2

Legal Representation

Plaintiff Counsel: Morgan, Lewis & Bockius, LLP (lead: C. Erik Hawes)
Defendant Counsel: Cherry Johnson Siegmund James PLLC; Findlay Craft PC; Moyles IP LLC; Steckler Wayne Cherry & Love PLLC; Womble Bond Dickinson (US) LLP (lead: Barry J. Herman)

Litigation Timeline & Procedural History

SWM International filed this infringement action on August 3, 2021, in the Western District of Texas—a court historically favored by patent plaintiffs for its patent-friendly docket management and experienced judiciary in IP matters. The case was categorized as a first-instance district court proceeding, meaning no prior adjudication at the PTAB or ITC level appears to have been the direct procedural precursor to this filing, and the merits were to be decided at the trial court level for the first time.

The case ran for 1,063 days—nearly three full years—before closing on July 1, 2024. This duration, well beyond the median patent case lifecycle, suggests the parties engaged in substantial discovery, claim construction proceedings, and possibly motion practice or settlement negotiations before reaching their resolution. The case terminated via a stipulated voluntary dismissal with prejudice under FRCP 41(a)(1)(A)(ii), the mechanism typically used when both parties have agreed to a settlement and wish to foreclose any future re-filing of the same claims. The mutual cost-bearing agreement is a hallmark of a negotiated business resolution rather than a party conceding defeat on the merits.

The Verdict & Legal Analysis

Outcome

The case was dismissed with prejudice pursuant to a joint stipulation by both SWM International and DynaEnergetics under Federal Rule of Civil Procedure 41(a)(1)(A)(ii). No damages were awarded by the court, and no injunctive relief was ordered as part of the record dismissal. Each party agreed to bear its own costs, expenses, and attorneys’ fees, leaving the underlying merits of the infringement claims—validity, enforceability, and scope of US11078762B2—unresolved on the public record.

Verdict Cause Analysis

The stipulated dismissal with prejudice in this infringement action reflects several legally significant dynamics that practitioners should examine carefully

• The use of FRCP 41(a)(1)(A)(ii) requires a signed stipulation by all appearing parties, confirming that DynaEnergetics’ counsel actively participated in and agreed to the dismissal terms rather than simply consenting to a plaintiff withdrawal.
• Dismissal with prejudice bars SWM from re-filing the same infringement claims against DynaEnergetics on US11078762B2 in any subsequent action, providing DynaEnergetics with res judicata protection on those specific allegations.
• The mutual cost-bearing provision departs from the default American Rule and signals that neither party succeeded sufficiently on the merits to justify a fee-shifting argument under 35 U.S.C. § 285 for exceptional case findings.
• The nearly three-year duration prior to dismissal suggests that claim construction, expert discovery, or inter partes review proceedings may have altered the litigation calculus sufficiently to motivate settlement, though no such parallel proceedings are confirmed in the public record of this case filing.

Legal Significance

1. 1. Because no claim construction order or summary judgment ruling was issued as part of the public record, US11078762B2 retains its full, unconstrued claim scope for purposes of future enforcement actions against third parties beyond DynaEnergetics.
2. 2. The dismissal with prejudice creates a final adjudication as between SWM and DynaEnergetics specifically, but does not constitute a ruling on patent validity or infringement, meaning the patent remains presumptively valid and enforceable against other accused infringers in the perforating gun market.
3. 3. Competitors in the downhole perforating gun sector should note that this resolution does not establish binding claim interpretation, leaving open the question of how broadly US11078762B2’s claims would be construed by a court—a factor that should inform any FTO analysis in this technology space.

Strategic Takeaways

For Patent Attorneys:

• When litigating in W.D. Texas for nearly three years without a public Markman ruling, consider whether parallel PTAB proceedings (IPR or PGR) may be driving the settlement timeline and plan client strategy accordingly.
• The FRCP 41(a)(1)(A)(ii) stipulated dismissal mechanism is an effective tool for locking in mutual release and res judicata protection—ensure that settlement agreements expressly address the scope of release relative to all patent family members, not just the asserted patent.
• The mutual cost-bearing clause avoids § 285 exceptional case exposure for both sides; when negotiating similar resolutions, confirm that no fee-shifting motions are pending before execution to avoid lingering disputes.
• Because US11078762B2’s claims were never publicly construed, future enforcement opportunities against third parties remain viable for SWM—counsel should preserve prosecution history records and technical documentation for subsequent assertion campaigns.

For IP Professionals:

• Monitor the patent family surrounding US11078762B2 (application US16/293508) for continuation or divisional applications that SWM may be prosecuting, as the dismissal does not resolve the breadth of SWM’s IP position in downhole perforating gun technology.
• Given the three-year duration and confidential resolution, in-house teams at oil and gas equipment manufacturers should conduct a proactive FTO review of perforating gun system designs against US11078762B2 before any new product launch in this space.

For R&D Teams:

• R&D teams developing downhole perforating gun systems should treat US11078762B2 as an active risk asset—the patent’s claims were never invalidated or narrowed in public proceedings, meaning design-around analysis should reference the full issued claim scope.
• Document design choices and engineering decisions that differentiate new perforating gun architectures from the structures described in US11078762B2, as this documentation will be critical for any future FTO opinion or litigation defense.