Patents
US 11021918 B2: Well control system having one or more adjustable orifice choke valves and method
- Granted
- 2021-06-01
- Filed
- 2018-12-28 application 16235568
- Type
- Utility · 9 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A well drilling system is provided that includes a choke manifold and a controller. The choke manifold includes at least one choke valve. The choke valve is actuable between fully open and closed choke positions. The choke valve has a Cv value for each choke position. The controller is in communication with the choke valve and a non-transitory memory storing instructions. The instructions relate Cv values to choke positions for the choke valve. The instructions when executed cause the controller to: a) determine a difference in pressure (ΔP); b) input or determine a density value; c) input or determine a Q value; d) determine a first Cv value using the ΔP, the density value, and the Q value; and e) actuate the choke valve to a first choke position associated with the first Cv value.
Source: PVGPATDIS, file of 2026-04-10 (ipg210601.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| ADS Services, LLC 18 patents | US company or organization | Midland, TX | ADS SERVICES, LLC State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Anand Parthasarathy | Cypress, TX | 34 | PVGPATDIS, file of 2026-04-10 | |
| Scott Charles | Houston, TX | 15 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E21B | Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells | E21B21/08 | PVGPATDIS, file of 2026-04-10 |
| G05B | Control or regulating systems in general; functional elements of such systems; monitoring or testing arrangements for such systems or elements | G05B2219/45129 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2025-09-30 | Release of security interest Release of security interest | DNB BANK ASA, LONDON BRANCH signed 2025-07-23 | EXPRO AMERICAS, LLC HOUSTON, TX | 72421/327 | PASDL, file of 2026-10-15 |
| 2025-09-09 | Assignment Assignment of assignor's interest | ADS SERVICES, LLC signed 2025-07-31 | CORTEC, L.L.C. HOUSTON, TX | 72200/236 | ECORSEXC, file of 2026-09-25 |
| 2021-10-04 | Security interest Security interest Short-form patent and trademark security agreement | EXPRO AMERICAS, LLC signed 2021-10-01 | DNB BANK ASA, LONDON BRANCH LONDON | 57719/904 | PASDL, file of 2026-10-15 |
| 2020-12-15 | Assignment Assignment of assignor's interest | EXPRO AMERICAS, LLC signed 2020-12-01 | ADS SERVICES LLC MIDLAND, TX | 54649/810 | ECORSEXC, file of 2026-09-25 |
| 2019-02-12 | Assignment Assignment of assignor's interest | CHARLES, SCOTT signed 2019-02-11 PARTHASARATHY, ANAND signed 2019-02-11 | EXPRO AMERICAS, LLC HOUSTON, TX | 48301/423 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.