Halliburton v. NOV & ReedHycalog: PDC Cutter Patent Dispute Ends in Plaintiff Win
Halliburton Energy Services secured judgment on three of five counts against Grant Prideco, NOV Inc., and ReedHycalog over PDC drill bit cutting element patents US8721752B2 and US7568534B2. The 924-day case, decided on summary judgment, also extinguishes Halliburton’s obligations under a pre-existing license agreement upon expiration of the ‘534 Patent.
Halliburton Secures PDC Patent Judgment, Terminates License Obligations
Filed on May 15, 2023, in the Texas Southern District Court before Judge Andrew S. Hanen, this infringement action pitted Halliburton Co. against a cluster of NOV-affiliated entities — Grant Prideco Inc., ReedHycalog UK Ltd., ReedHycalog LP, and NOV Inc. — over two polycrystalline diamond compact (PDC) drill bit patents: US8721752B2, covering dual-edge working surfaces for PDC cutting elements, and US7568534B2, covering PDC cutters with stress-diffusing structures.
The case closed on November 24, 2025, via summary judgment rather than full trial. The court entered judgment in Halliburton’s favor on Counts I, II, and III of the complaint. On Count IV, the court had previously ruled that Halliburton could not infringe the 12 defined ‘Core Patents,’ rendering the remainder moot. Halliburton lost on Count V, and a joint stipulation confirmed US7568534B2 is a Licensed RH Patent, giving NOV judgment on Counterclaim Count II. Critically, the court ordered that defendants take nothing from Halliburton, and that Halliburton’s obligations under the underlying License Agreement terminate upon expiration of the ‘534 Patent.
A 924-day duration suggests protracted claim construction and summary judgment briefing consistent with complex patent disputes involving license interpretation and multi-party coordination. The case was resolved without a damages jury trial, which typically signals either a liability-only adjudication or a strategic settlement of monetary terms outside the formal record. The termination of license obligations is commercially significant and may reshape competitive dynamics in the PDC drill bit market, though the specific financial terms of that license remain undisclosed in public filings.
Filing to Judgment on the merits for Plaintiff in 924 days
924 days — above median for patent infringement cases in Texas Southern District Court
Judgment for Halliburton: what the mixed verdict means for both parties
Summary judgment ends case without trial on key patent counts
The court resolved the central patent counts — I, II, and III — on motions for summary judgment rather than a full jury trial. Summary judgment is granted when no genuine dispute of material fact exists and the moving party is entitled to judgment as a matter of law. Here, Halliburton succeeded on the ‘752 Patent Family issue (Counterclaim Count I) on November 24, 2025, the final remaining issue, triggering entry of the consolidated final judgment.
Decided on summary judgmentHalliburton wins on core counts and sheds license obligations
Judgment on Counts I, II, and III confirms Halliburton’s patent positions under US8721752B2 and US7568534B2 are upheld against NOV’s counterclaims and defenses. The additional consequence — termination of Halliburton’s obligations under the License Agreement on expiration of the ‘534 Patent — strengthens Halliburton’s competitive freedom in the PDC cutter market without an ongoing royalty or contractual restriction tethering it to NOV-family entities.
License obligations terminatedNOV takes nothing; counterclaims largely defeated
The court ordered that defendants take nothing from Halliburton. NOV prevailed narrowly: judgment on Halliburton’s Count V and on Counterclaim Count II (based on the parties’ stipulation that US7568534B2 is a Licensed RH Patent). However, Counterclaim Count III was decided in Halliburton’s favor, and the ‘752 Patent Family counterclaim — the last contested issue — was also resolved against NOV. The overall result substantially forecloses NOV’s litigation strategy in this proceeding.
NOV’s counterclaims largely defeatedPDC cutter IP landscape shifts as Halliburton sheds license ties
PDC cutting element technology is foundational to modern rotary drilling efficiency. This judgment signals that Halliburton’s dual-edge and stress-diffusing PDC cutter patents have withstood a well-resourced multi-party challenge. For competitors and licensees in the drill bit sector, the ruling suggests these patents carry enforceable weight. The license termination further suggests Halliburton may pursue more assertive commercialisation or licensing strategies for its PDC IP portfolio going forward.
Strengthened PDC cutter IP positionFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Halliburton, Co. | Company | Oilfield services technology company — holder of US8721752B2 and US7568534B2Search in Eureka ↗ |
| Defendant | Grant Prideco, Inc. | Company | NOV Inc. and ReedHycalog entities; global drilling equipment and PDC cutter manufacturersSearch in Eureka ↗ |
| Co-Defendant | Nov, Inc. | Company | Search in Eureka ↗ |
| Co-Defendant | ReedHycalog UK, Ltd. | Company | Search in Eureka ↗ |
| Co-Defendant | ReedHycalog, LP | Company | Search in Eureka ↗ |
| Plaintiff counsel | Chris Ilardi | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | David E Finck | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | Greg Matthew Polins | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | Gregg F. Locascio | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | James John Lomeo | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | Mara Lynn Greenberg | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | Michael Thomas Dinnella | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | Ryan Patrick Kane | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff counsel | Tera J. Stone | Attorney | Counsel for Halliburton, Co.Search in Eureka ↗ |
| Plaintiff law firm | Kirkland & Ellis LLP | Law Firm | Representing Halliburton, Co.Search in Eureka ↗ |
| Plaintiff law firm | Vorys Sayer Seymour & Pease LLP | Law Firm | Representing Halliburton, Co.Search in Eureka ↗ |
| Defendant counsel | Abigail Claire Noebels | Attorney | Counsel for Grant Prideco, Inc.Search in Eureka ↗ |
| Defendant counsel | Armando Lozano, III | Attorney | Counsel for Grant Prideco, Inc.Search in Eureka ↗ |
| Defendant counsel | Harry Paul Susman | Attorney | Counsel for Grant Prideco, Inc.Search in Eureka ↗ |
| Defendant law firm | Susman Godfrey | Law Firm | Representing Grant Prideco, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Andrew S Hanen | Judge | Texas Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The final judgment is notable for its mixed but Halliburton-dominant structure: three counts decided for the plaintiff, one rendered moot by prior claim construction (the 12 Core Patents ruling), and one count where NOV prevailed. The court’s language — ‘defendants take nothing from Plaintiff’ — is a standard merits disposition confirming NOV’s counterclaims yielded no monetary or contractual relief. The resolution of the ‘752 Patent Family issue as the ‘last remaining issue in controversy’ suggests the parties had progressively narrowed the dispute through earlier rulings and stipulations, with summary judgment serving as the terminal mechanism rather than a damages jury trial.
US8721752B2 & US7568534B2 — PDC Drill Bit Cutting Element Patents
US8721752B2 (application no. 12/672927) covers dual-edge working surface geometries for polycrystalline diamond compact cutting elements — a design feature that affects cutting efficiency and wear performance in rotary drilling. US7568534B2 (application no. 12/037312) covers stress-diffusing structures within PDC cutters, which are engineered to reduce fracture risk during high-load drilling operations. Both patents sit within the foundational technology stack for modern PDC drill bits used in oil and gas well construction.
PDC cutter design is a strategically contested space: small geometric and structural improvements translate directly into rate of penetration and tool life advantages worth tens of millions in operational savings per drilling programme. Halliburton’s ability to defend these patents against ReedHycalog and NOV — historically dominant PDC cutter suppliers — is commercially significant. The ‘752 Patent Family, which formed the final contested issue, suggests this family carries particular strategic weight and is likely subject to ongoing monitoring by competing R&D teams.
Should your PDC cutter design be cleared against US8721752B2?
Any R&D or product team developing PDC cutting elements — particularly designs featuring modified working surface geometries or internal stress-relief structures — should treat this judgment as a trigger for a fresh freedom-to-operate assessment. The court’s upholding of these patents against a well-funded, multi-entity defence confirms their validity is not easily challenged. Manufacturers, licensees, and new market entrants in the PDC drill bit supply chain face real infringement exposure if their cutter designs overlap with the claimed features of US8721752B2 or US7568534B2.
PatSnap Eureka’s FTO Search Agent can map the claim scope of US8721752B2 and US7568534B2 against your specific cutter geometries and structural designs, flag design-arounds adopted by competitors, and surface the full ReedHycalog and NOV patent families for cross-reference. Given the license termination ruling, FTO analysis should also account for any historical licensing arrangements that may no longer provide clearance post-expiry of the ‘534 Patent.
Run a freedom-to-operate analysis on US8721752B2 to assess your product’s exposure
Run FTO in Eureka →Similar PDC Drill Bit Patent Infringement Cases in US District Courts
Cases involving PDC cutting element patents and oilfield drilling IP disputes in Texas federal courts, with comparable multi-party and license-scope dimensions.
What this case signals for the PDC drill bit IP landscape
A plaintiff win via summary judgment against four defendants reinforces Halliburton’s PDC patent portfolio and reshapes licensing dynamics in oilfield drilling.
Multi-party patent disputes can be resolved without trial — but take time
Despite involving four defendants and a complex license agreement, this case closed on summary judgment after 924 days. For IP teams in the oilfield equipment sector, this confirms that robust claim construction and summary judgment strategy can be decisive — particularly when license scope is in dispute alongside infringement claims.
License agreement scope is as important as the patent claims themselves
The outcome turned in part on whether certain patents were ‘Licensed RH Patents.’ Parties with overlapping licensing and infringement positions should audit whether existing agreements constrain or expand their litigation exposure — and ensure license term definitions are unambiguous before disputes arise.
Halliburton v Grant — key questions answered
Judgment was entered in favour of Halliburton on Counts I, II, and III of its complaint. The court ordered that defendants take nothing from Halliburton. NOV prevailed on Count V and Counterclaim Count II. The judgment also terminated Halliburton’s obligations under the License Agreement upon expiration of US7568534B2.
Two patents were central: US8721752B2, covering dual-edge working surfaces for PDC cutting elements, and US7568534B2, covering PDC cutters with stress-diffusing structures. The ‘752 Patent Family issue was the last remaining contested matter, resolved by summary judgment on November 24, 2025.
The court ordered that Halliburton’s obligations under the pre-existing License Agreement terminate upon the expiration of US7568534B2 (the ‘534 Patent). This means Halliburton is no longer bound by the contractual terms of that agreement after the patent expires, potentially freeing it from royalty or use restrictions tied to ReedHycalog-family patents.
In a February 13, 2025 order (Doc. No. 200), Judge Hanen ruled that Halliburton cannot infringe the 12 defined ‘Core Patents’ as a matter of law. This rendered the remainder of Count IV moot and narrowed the live issues to those ultimately resolved by the November 2025 summary judgment orders.
The public record does not reflect a jury trial. The case was resolved through summary judgment orders issued on September 29, 2025 (Doc. No. 316) and November 24, 2025 (Doc. No. 340), together with a Joint Stipulation on Foreign Patents. This suggests the parties litigated liability and license scope at the summary judgment stage without a separate damages trial.
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