Patents
US 9097085 B2: Multiphase drilling systems and methods
- Granted
- 2015-08-04
- Filed
- 2009-08-14 application 12541242
- Type
- Utility · 4 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
In one embodiment, a method for drilling a wellbore includes injecting drilling fluid through a drill string disposed in the wellbore and rotating a drill bit disposed on a bottom of the drill string. The drilling fluid includes a liquid and a gas. The drilling fluid is injected at the surface. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The drilling fluid and cuttings (returns) flow to the surface via an annulus formed between the drill string and the wellbore. The liquid is injected at a rate so that a liquid velocity of the returns in the annulus is sufficient to transport the cuttings. The method further includes drilling through at least a portion of a non-productive formation.
Source: PVGPATDIS, file of 2026-04-10 (ipg150804.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Lubrizol oilfield Solutions, Inc. 6 patents | US company or organization | Wickliffe, OH | LUBRIZOL OILFIELD SOLUTIONS, INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Daniel Guy Pomerleau | Calgary, CA | 16 | PVGPATDIS, file of 2026-04-10 | |
| Keith Kenneth Corb | Calgary, CA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Stuart Dwight Butler | Calgary, CA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Robert T. Staysko | Calgary, CA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Gregg MacKay Jollymore | Hearst, CA | 1 | 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 | E21B21/16 | PVGPATDIS, file of 2026-04-10 |
| C09K | Materials for miscellaneous applications, not provided for elsewhere | C09K8/38 | 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 |
|---|---|---|---|---|---|
| 2023-04-26 | Security interest Security interest Patent security interest assignment agreement | DEUTSCHE BANK TRUST COMPANY AMERICAS signed 2023-01-31 | WELLS FARGO BANK, NATIONAL ASSOCIATION CHARLOTTE, NC | 63470/629 | PASDL, file of 2026-10-15 |
| 2020-08-28 | Release of security interest Release of security interest | WELLS FARGO BANK, NATIONAL ASSOCIATION signed 2020-08-28 | WEATHERFORD TECHNOLOGY HOLDINGS, LLC HOUSTON, TX WEATHERFORD NETHERLANDS B.V. HOUSTON, TX WEATHERFORD NORGE AS HOUSTON, TX HIGH PRESSURE INTEGRITY, INC. HOUSTON, TX PRECISION ENERGY SERVICES, INC. HOUSTON, TX WEATHERFORD CANADA LTD. HOUSTON, TX WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH HOUSTON, TX PRECISION ENERGY SERVICES ULC HOUSTON, TX WEATHERFORD U.K. LIMITED HOUSTON, TX | 53838/323 | PASDL, file of 2026-10-15 |
| 2019-12-26 | Security interest Security interest Security interest | WEATHERFORD TECHNOLOGY HOLDINGS, LLC signed 2019-12-13 WEATHERFORD NETHERLANDS B.V. signed 2019-12-13 WEATHERFORD NORGE AS signed 2019-12-13 HIGH PRESSURE INTEGRITY, INC. signed 2019-12-13 PRECISION ENERGY SERVICES, INC. signed 2019-12-13 WEATHERFORD CANADA LTD. signed 2019-12-13 WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH signed 2019-12-13 PRECISION ENERGY SERVICES ULC signed 2019-12-13 WEATHERFORD U.K. LIMITED signed 2019-12-13 | DEUTSCHE BANK TRUST COMPANY AMERICAS, AS ADMINISTRATIVE AGENT NEW YORK, NY | 51419/140 | PASDL, file of 2026-10-15 |
| 2019-12-18 | Security interest Security interest Security interest | WEATHERFORD TECHNOLOGY HOLDINGS LLC signed 2019-12-13 WEATHERFORD NETHERLANDS B.V. signed 2019-12-13 WEATHERFORD NORGE AS signed 2019-12-13 HIGH PRESSURE INTEGRITY INC. signed 2019-12-13 PRECISION ENERGY SERVICES INC. signed 2019-12-13 WEATHERFORD CANADA LTD. signed 2019-12-13 WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH signed 2019-12-13 PRECISION ENERGY SERVICES ULC signed 2019-12-13 WEATHERFORD U.K. LIMITED signed 2019-12-13 | WELLS FARGO BANK NATIONAL ASSOCIATION AS AGENT DALLAS, TX | 51891/89 | PASDL, file of 2026-10-15 |
| 2015-09-08 | Assignment Assignment of assignor's interest | LUBRIZOL OILFIELD SOLUTIONS, INC. signed 2015-07-30 | WEATHERFORD TECHNOLOGY HOLDINGS, LLC HOUSTON, TX | 36511/513 | ECORSEXC, file of 2026-09-25 |
| 2015-06-18 | Assignment Assignment of assignor's interest | WEATHERFORD TECHNOLOGY HOLDINGS, LLC signed 2015-06-01 | LUBRIZOL OILFIELD SOLUTIONS, INC. WICKLIFFE, OH | 35943/540 | ECORSEXC, file of 2026-09-25 |
| 2014-12-04 | Assignment Assignment of assignor's interest | WEATHERFORD/LAMB, INC. signed 2014-09-01 | WEATHERFORD TECHNOLOGY HOLDINGS, LLC HOUSTON, TX | 34526/272 | PASDL, file of 2026-10-15 |
| 2011-04-13 | Correction Corrective assignment to correct the assignor's name previously recorded on reel 025804 frame 0828. assignor(s) hereby confirms the assignment. | DANIEL GUY POMERLEAU, BY ENGINEERING DRILLING SOLUTIONS, INC. signed 2010-01-29 | SUNCOR ENERGY INC. CALGARY, ALBERTA | 26117/45 | ECORSEXC, file of 2026-09-25 |
| 2011-02-14 | Assignment Assignment of assignor's interest | WEATHERFORD INTERNATIONAL, INC AND WEATHERFORD CANADA PARTNERSHIP signed 2011-02-07 | WEATHERFORD/LAMB, INC. HOUSTON, TX | 25804/888 | ECORSEXC, file of 2026-09-25 |
| 2011-02-14 | Assignment Assignment of assignor's interest | SUNCOR ENERGY INC. signed 2010-02-16 | WEATHERFORD INTERNATIONAL, INC AND WEATHERFORD CANADA PARTNERSHIP WALLINGFORD, CT | 25804/852 | ECORSEXC, file of 2026-09-25 |
| 2011-02-14 | Assignment Assignment of assignor's interest | ENGINEERING DRILLING SOLUTIONS, INC. signed 2010-01-29 | SUNCOR ENERGY INC. CALGARY, ALBERTA | 25804/828 | ECORSEXC, file of 2026-09-25 |
| 2011-02-14 | Assignment Assignment of assignor's interest | STAYSKO, BOB signed 2010-02-16 | SUNCOR ENERGY INC. CALGARY, ALBERTA | 25804/766 | ECORSEXC, file of 2026-09-25 |
| 2011-02-14 | Assignment Assignment of assignor's interest | CORB, KEITH KENNETH signed 2009-08-11 JOLLYMORE, GREGG MACKAY signed 2010-01-06 BUTLER, STUART DWIGHT signed 2010-02-11 | WEATHERFORD/LAMB, INC. HOUSTON, TX | 25804/722 | 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.