Jeffrey Scott Dawson

US Patent:

6383990, May 7, 2002

Filed:

Dec 3, 1999

Appl. No.:

09/454687

Inventors:

Jeffrey C. Dawson - Spring TX
Hoang Van Le - Houston TX
Subramanian Kesavan - The Woodlands TX

Assignee:

BJ Services Company - Houston TX

International Classification:

C09K 300

US Classification:

507209, 507211, 507240, 507271, 507922, 166308

Abstract:

Methods are provided for fracturing subterranean formations using fluids having substantially reduced polymer loadings that have performance equivalent to conventional fluids. Reduced polymer loadings provide significant advantages such as reduced treatment costs and less damage to the fracture sand pack and surrounding subterranean formations.

US Patent:

6387853, May 14, 2002

Filed:

Mar 27, 1998

Appl. No.:

09/049610

Inventors:

Jeffrey C. Dawson - Spring TX
Subramanian Kesavan - Woodlands TX
Hoang V. Le - Houston TX

Assignee:

BJ Services Company - Houston TX

International Classification:

C09K 300

US Classification:

507211, 507209, 507212, 507214, 507217, 507922, 507230, 536108, 536110, 536 63, 536123, 5361231, 525 58, 525 61

Abstract:

Polymers are derivatized and then may be introduced into a wellbore, such as in a hydraulic fracturing treatment. A polymer may be a guar powder that is mixed with a organic solvent and derivatized using a derivatizing agent, such as sodium chloroacetate. The polymer is typically derivatized in bulk prior to introduction into the wellbore. The derivatized polymer may be hydrated and/or crosslinked prior to introduction into the wellbore.

US Patent:

6419017, Jul 16, 2002

Filed:

Sep 20, 2000

Appl. No.:

09/666043

Inventors:

Arthur Steven Metcalf - Tomball TX
Jeffrey C. Dawson - Spring TX

Assignee:

BJ Services Company - Houston TX

International Classification:

E21B 3300

US Classification:

166295, 166300

Abstract:

A method of preventing gas breakthrough in an oil well, which includes first pumping a slug of an alkaline earth salt into the well bore, followed by a slug of spacer solution, and finally a slug of a fatty acid resin. The resin can comprise at least one fatty acid, a fat (or tall oil), and other components. The resin and alkaline earth salt advantageously react in situ to form a water and gas insoluble precipitate or gum that forms a sealing zone around the oil/gas interface of the well bore, and also allows the oil to dissolve the precipitate to facilitate recovery of the oil.

US Patent:

6439309, Aug 27, 2002

Filed:

Dec 13, 2000

Appl. No.:

09/736478

Inventors:

Ronald M. Matherly - Sugar Land TX
Allan R. Rickards - Pinehurst TX
Jeffrey C. Dawson - Spring TX

Assignee:

BJ Services Company - Houston TX

International Classification:

E21B 33138

US Classification:

166276, 166280, 166281, 166295, 507219, 507924, 428405, 428407, 523131

Abstract:

Silyl-modified polyamides, and subterranean formation treatments employing silyl-modified polyamides to minimize migration or movement of naturally occurring or introducable solid particulates within a subterranean formation and/or within a wellbore penetrating a subterranean formation.

US Patent:

6649572, Nov 18, 2003

Filed:

Feb 15, 2001

Appl. No.:

09/784695

Inventors:

Jeffrey C. Dawson - Spring TX
Hoang Van Le - Houston TX
Subramanian Kesavan - The Woodlands TX

Assignee:

B J Services Company - Houston TX

International Classification:

C09K 300

US Classification:

507209, 507211, 507240, 507271, 507903, 507922, 166308

Abstract:

Methods are provided for fracturing subterranean formations using fluids having substantially reduced polymer loadings that have performance equivalent to conventional fluids. Reduced polymer loadings provide significant advantages such as reduced treatment costs and less damage to the fracture sand pack and surrounding subterranean formations.

US Patent:

6756345, Jun 29, 2004

Filed:

May 15, 2001

Appl. No.:

09/855412

Inventors:

Marek K. Pakulski - The Woodlands TX
Jeffrey C. Dawson - Spring TX

Assignee:

BJ Services Company - Houston TX

International Classification:

C09K 300

US Classification:

507246, 507922, 507229, 507225, 507209, 507211, 507903, 166308

Abstract:

A well service fluid composition comprises a fracturing fluid and a gas hydrate inhibitor. Preferably, the gas hydrate inhibitor does not affect the function of the fracturing fluid and is present in an amount sufficient to control and/or minimize the formation of gas hydrates. The well service fluid composition is useful in hydraulic fracturing in which the composition is injected into a subterranean formation under sufficient pressure to initiate and propagate a fracture in the formation. The fracturing fluid may be subsequently recovered when the fracturing operation is completed.

US Patent:

6767868, Jul 27, 2004

Filed:

Feb 22, 2001

Appl. No.:

09/791042

Inventors:

Jeffrey Dawson - Spring TX
Subramanian Kesavan - East Windsor NJ
Hoang Van Le - Spring TX

Assignee:

BJ Services Company - Houston TX

International Classification:

C09K 300

US Classification:

507236, 507237, 507209, 507211, 507241, 507271, 507902, 507922, 166308

Abstract:

A method of fracturing a zone of a subterranean formation penetrated by a well bore is shown in which a gelable fracturing fluid is formed by combining an aqueous base fluid and a hydratable polymer. A transition metal crosslinker is added to the aqueous base fluid for crosslinking the hydratable polymer to form a gelled fluid of sufficient viscosity to facilitate fracturing of the formation. A proppant can also be added to the gelable fracturing fluid. The gelled fluid and proppant are then injected into the well bore and into contact with the formation under sufficient pressure to fracture the formation. The gelable fracturing fluid has incorporated therein a delayed release breaker comprising a complex multivalent chelating agent that is released slowly over a period of time to compete with the polymer for the transition metal crosslinker, thereby reducing the viscosity of the fluid.

US Patent:

6772838, Aug 10, 2004

Filed:

Apr 1, 2002

Appl. No.:

10/113844

Inventors:

Jeffrey C. Dawson - Spring TX
Allan R. Rickards - Pinehurst TX

Assignee:

BJ Services Company - Houston TX

International Classification:

E21B 4326

US Classification:

166280, 166310, 507924

Abstract:

Methods and compositions useful for sand control and/or hydraulic fracturing of subterranean formations that utilize relatively lightweight and/or substantially neutrally buoyant particles as particulate sand control or proppant material. Particles that may be employed include particulates of naturally-occurring materials that may be optionally strengthened or hardened by exposure to a modifying agent. Effectiveness of a modifying agent may be optionally enhanced by facilitating interaction between a modifying agent and one or more components present in a naturally occurring material by using enhancing agents and/or by using conditions that enhance interaction.