Donald Lacory Hill

US Patent:

6399547, Jun 4, 2002

Filed:

Feb 24, 2000

Appl. No.:

09/512495

Inventors:

Wayne W. Frenier - Katy TX
Donald G. Hill - Sugar Land TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

C09K 300

US Classification:

507268, 507939, 252396

Abstract:

An acidic fluid that is useful in stimulation and workover operations, and in particular, in matrix acidizing treatments, comprises an acid, such as hydrochloric acid; water; an aliphatic aldehyde having 1-10 carbon atoms; and an aromatic aldehyde having 7-20 carbon atoms. The aliphatic aldehyde preferably has 1-6 carbon atoms. Glyoxylic acid and glyoxal are especially preferred aliphatic aldehydes. The aromatic aldehyde preferably has 7-10 carbon atoms. Cinnamaldehyde is especially preferred.

US Patent:

20050065041, Mar 24, 2005

Filed:

Sep 18, 2003

Appl. No.:

10/605265

Inventors:

Donald Hill - Sugar Land TX, US

Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX

International Classification:

E21B043/00

US Classification:

507271000

Abstract:

Reducing agents or reducing agent precursors are provided for breaking ferric ion crosslinks in polymers in gelled acids used for diversion in matrix acidizing and used for leakoff control in acid fracturing. Previous reducing agents were very toxic to aquatic species or so active that they could be used only at low temperatures. The new reducing agents and reducing agent precursors are less reactive, less toxic, and leave less residue behind to impede fluid flow after the gel is broken after the treatment. Suitable compounds are sources of one or two hydrazines or sources of hydroxylamine. Such compounds are carbohydrazides, semicarbohydrazides, ketoximes, and aldoximes.

US Patent:

60680563, May 30, 2000

Filed:

Oct 13, 1999

Appl. No.:

9/417426

Inventors:

Wayne W. Frenier - Katy TX
Donald G. Hill - Sugar Land TX

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 3700
E21B 4102
E21B 4327

US Classification:

166307

Abstract:

An acidic fluid that is useful in stimulation and workover operations, and in particular, in matrix acidizing treatments, comprises an acid, such as hydrochloric acid; water; an aliphatic aldehyde having 1-10 carbon atoms; and an aromatic aldehyde having 7-20 carbon atoms. The aliphatic aldehyde preferably has 1-6 carbon atoms. Glyoxylic acid and glyoxal are especially preferred aliphatic aldehydes. The aromatic aldehyde preferably has 7-10 carbon atoms. Cinnamaldehyde is especially preferred.

US Patent:

20140262280, Sep 18, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/839281

Inventors:

- Naperville IL, US
Donald G. Hill - Sugar Land TX, US

Assignee:

Ecolab USA Inc. - Naperville IL

International Classification:

C09K 8/524

US Classification:

166304, 507244, 507240

Abstract:

The present disclosure provides chemical compositions useful for minimizing or preventing the precipitation of sludge, such as asphaltenes, maltenes, or similar asphaltic components, during an acidizing treatment. Methods for preventing or minimizing sludge formation are also disclosed. The anti-sludge compositions can be added to an aqueous acidic solution before injecting the solution into a well for treatment. The compositions can include a formulated dodecylbenzene sulfonic acid, a cationic surfactant, a corrosion inhibitor, and an iron reducing agent, in addition to other additives.