Granted Patent
Utility
US 6,607,042
· Confirmation No. 2520
METHOD OF DYNAMICALLY CONTROLLING BOTTOM HOLE CIRCULATION PRESSURE IN A WELLBORE
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⬇ PDF
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Code | Description | Pages | ||
|---|---|---|---|---|---|
| 2019-12-23 | OATH |
Oath or Declaration filed | 9 | View | |
| 2001-05-17 | TRNA |
Transmittal of New Application | 1 | View | |
| 2001-05-17 | SPEC |
Specification | 29 | View | |
| 2001-05-17 | CLM |
Claims | 13 | View | |
| 2001-05-17 | ABST |
Abstract | 1 | View | |
| 2001-05-17 | DRW |
Drawings-only black and white line drawings | 7 | View | |
| 2001-05-17 | OATH |
Oath or Declaration filed | 3 | View |
Inventors
Carel W. J. Hoyer
Calgary, CANADA
Robert A. Graham
Norwich, UNITED KINGDOM
Adrian Steiner
Calgary, CANADA
Attorneys & Agents of Record
Classification
USPC
175/38
Prosecution
- Examiner
- NEUDER, WILLIAM P
- Art Unit
- 3672
- Docket No.
- PA-167
- Confirmation No.
- 2520
Publication
- Pub. No.
- US20020170749A1
- Pub. Date
- 2002-11-21
Patent Term Adjustment
-87days
No related applications found.
PATENT SECURITY INTEREST ASSIGNMENT AGREEMENT
Recorded 2023-04-26
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD.,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
PRECISION ENERGY SERVICES ULC,
WEATHERFORD U.K. LIMITED
RELEASE OF SECURITY INTEREST
Recorded 2020-08-28
from
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES ULC,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD.,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD U.K. LIMITED
SECURITY INTEREST
Recorded 2020-08-28
from
HIGH PRESSURE INTEGRITY, INC.,
PRECISION ENERGY SERVICES ULC,
PRECISION ENERGY SERVICES, INC.,
WEATHERFORD CANADA LTD.,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
WEATHERFORD TECHNOLOGY HOLDINGS, LLC,
WEATHERFORD U.K. LIMITED
SECURITY INTEREST
Recorded 2019-12-26
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2019-12-23
from
HIGH PRESSURE INTEGRITY INC.,
PRECISION ENERGY SERVICES INC.,
PRECISION ENERGY SERVICES ULC,
WEATHERFORD CANADA LTD.,
WEATHERFORD NETHERLANDS B.V.,
WEATHERFORD NORGE AS,
WEATHERFORD SWITZERLAND TRADING AND DEVELOPMENT GMBH,
WEATHERFORD TECHNOLOGY HOLDINGS LLC,
WEATHERFORD U.K. LIMITED
SECURITY INTEREST
Recorded 2019-12-18
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2006-04-26
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2006-04-24
CHANGE OF NAME
Recorded 2006-04-21
CHANGE OF NAME
Recorded 2005-06-30
(AMALGAMATION)
Recorded 2003-06-23
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2001-05-17
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Quick Facts
- Patent No.
- US 6,607,042
- App. No.
- 09/858,954
- Filed
- 2001-05-17
- Granted
- 2003-08-19
- Pub. No.
- US20020170749A1
- Examiner
- NEUDER, WILLIAM P
- Art Unit
- 3672
- PTA
- -87 days
External Links