Arvind C Patel

Address:

17406 Rdg Top Dr, Houston, TX 77090

VIN:

5NPET46C87H268474

Make:

HYUNDAI

Model:

SONATA

Year:

2007

US Patent:

6484821, Nov 26, 2002

Filed:

Nov 10, 2000

Appl. No.:

09/709962

Inventors:

Arvind D. Patel - Sugar Land TX
Emanuel Stamatakis - Houston TX
Eric Davis - Houston TX

Assignee:

M-I L.L.C. - Houston TX

International Classification:

C09K 702

US Classification:

175 64, 175 65, 175 72, 507133, 507140, 507145, 507905

Abstract:

A water-base drilling fluid for use in drilling wells through a formation containing a shale which swells in the presence of water. The drilling fluid preferably includes: an aqueous based continuous phase, a weight material, and a shale hydration inhibition agent having the formula: in which R and Râ are alkylene groups having 1 to 6 carbon atoms and x is a value from about 1 to about 25. The Y group should be an amine or alkoxy group, preferably a primary amine or a methoxy group. The shale hydration inhibition agent should be present in sufficient concentration to reduce the swelling of the shale. Also inclusive of the present invention is a method of reducing the swelling of shale clay encountered during the drilling of a subterranean well, the method comprising circulating in the well a water-base drilling fluid formulated in accordance with the present invention.

US Patent:

6589917, Jul 8, 2003

Filed:

Dec 20, 2000

Appl. No.:

09/745147

Inventors:

Arvind D. Patel - Sugar Land TX
Jim Friedheim - Spring TX

Assignee:

M-I LLC - Houston TX

International Classification:

C09K 706

US Classification:

507138, 507103

Abstract:

An invert emulsion suitable for drilling subterranean wells, in particular oil and gas wells is disclosed which has negative alkalinity and includes an oleaginous phase, and a non-oleaginous phase and an emulsifying agent which stabilizes the invert emulsion under conditions of negative alkalinity. The practice of the present invention permits the formulation of drilling fluids which are absent an alkaline reserve and are compatible with elastomers utilized in drilling equipment. Thus the invert emulsion fluids of the present invention are highly suitable for drilling oil and gas wells.

US Patent:

6609578, Aug 26, 2003

Filed:

Jun 18, 2001

Appl. No.:

09/884013

Inventors:

Arvind D. Patel - Sugar Land TX
Emanual Stamatakis - Houston TX
Eric Davis - Houston TX

Assignee:

Mo M-I LLC - Houston TX

International Classification:

B09K 100

US Classification:

175 64, 175 66, 175 72, 40512925, 4051293, 40512935, 507111, 507133, 507246, 507269, 507925

Abstract:

A water-base fluid for use in drilling wells and other drilling operation includes a shale which swells in the presence of water. The fluid preferably includes: an aqueous based continuous phase, and a shale hydration inhibition agent having the formula: in which R and Râ are alkylene groups having 1 to 6 carbon atoms and x is a value from about 1 to about 25. The Y group should be an amine or alkoxy group, preferably a primary amine or a methoxy group. The shale hydration inhibition agent should be present in sufficient concentration to reduce the swelling of the shale. The fluid may be used for formulating drilling fluids such as invert emulsion drilling muds or clear brine drilling fluids. The fluid may also be used in the slurrification and disposal of drill cuttings that contain water swellable clays or shales.

US Patent:

6770602, Aug 3, 2004

Filed:

Jan 31, 2002

Appl. No.:

10/062854

Inventors:

Arvind D. Patel - Sugar Land TX
Reginald Bell - Houston TX
Burhan Hoxha - Houston TX
Jim Friedheim - Spring TX

Assignee:

M-I LLC - Houston TX

International Classification:

C09K 706

US Classification:

507130, 507243

Abstract:

A fluid having utility in subterranean wells is formulated to include: an oleaginous fluid; and a solids tolerance agent having the formula: in which R is a C to C aliphatic group and Râ is a C to C aliphatic group and x has a value from about 1 to about 10. Preferably Râ is selected from ethyl and isopropyl and R is an unsaturated aliphatic group. The fluid is formulated such that the oleaginous fluid is from about 30% to about 99% by volume of said fluid. In one illustrative embodiment, the oleaginous fluid is composed from about 5% to about 100% by volume of the oleaginous fluid of a material selected from a group consisting of diesel oil, mineral oil, synthetic oil, esters, ethers, acetals, di-alkylcarbonates, olefins, and combinations of these and similar fluids. A non-oleaginous fluid may also be included in the formulation that is from about 1% to about 70% by volume of said fluid. The non-oleaginous fluid is preferably selected from sea water, a brine containing organic or inorganic dissolved salts, a liquid containing water-miscible organic compounds, and combinations thereof.

US Patent:

6793025, Sep 21, 2004

Filed:

Jun 17, 2002

Appl. No.:

10/172837

Inventors:

Arvind D. Patel - Sugar Land TX
Reginald J. Bell - Houston TX
Steve Young - Spring TX
Ahmadi Tehrani - Banchory, GB

Assignee:

M-I L. L. C. - Houston TX

International Classification:

C09K 706

US Classification:

175 50, 7315202, 7315203, 1662542, 175 65, 507103, 507129, 507130, 507135, 507136, 507240, 507248, 507260, 507904

Abstract:

A method of electrically logging subterranean wells using a conductive double emulsion fluid includes a miscible combination of an oleaginous fluid, an emulsifier capable of forming a microemulsion, an emulsifier capable of forming an invert emulsion, and an electrolytic salt. A microemulsion is the continuous phase of an invert emulsion. The electrolytic salt or brine of the salt is present in a concentration sufficient to permit the electrical logging of the subterranean well. The fluid may additionally contain a polar organic solvent and a carbon dioxide buffer. The polar organic solvent may be an oil soluble glycol or glycol ether such as ethylene glycol, diethylene glycol, propylene glycol, polypropylene glycol, and the like. The electrolytic salt preferably is a quaternary amine salt having the formula: wherein R is an alkyl having 8 to 18 carbon atoms, Râ is 2 to 6 carbon atoms alkyl group, B is hydrogen, oxyalkyl having 1 to 4 carbon atoms or alkyl having 1 to 4 carbon atoms, A is hydrogen or alkyl with 1 to 4 carbon atoms, x+y=1 to 15, z is 0 to 3, and M is a counter anion; or combinations thereof. In such instances the quaternary amine salt serves both as the electrolyte and the microemulsifer.

US Patent:

6831043, Dec 14, 2004

Filed:

Jan 31, 2002

Appl. No.:

10/062071

Inventors:

Arvind D. Patel - Sugar Land TX
Emanuel Stamatakis - Houston TX
Eric Davis - Houston TX
Jim Friedheim - Spring TX

Assignee:

M-I LLC - Houston TX

International Classification:

C09K 702

US Classification:

507133, 507246, 507111, 507212, 175 64

Abstract:

A water-base fluid for use in drilling wells and other drilling operation includes a shale clay which swells in the presence of water. The fluid preferably includes: an aqueous based continuous phase, and a shale hydration inhibition agent having the formula: wherein R and Râ are independently selectable alkylene groups having 2 to 4 carbon atoms, and wherein x and y have independently selected values such that the sum of x and y is at least 1. The shale hydration inhibition agent should be present in sufficient concentration to reduce the swelling of the shale clay. The fluid may be used for formulating drilling fluids such as water-base drilling muds or clear brine drilling fluids. The fluid may also be used in the slurrification and disposal of drill cuttings that contain water swellable clays or shale clays.

US Patent:

6857485, Feb 22, 2005

Filed:

Jul 15, 2002

Appl. No.:

10/195686

Inventors:

Arvind D. Patel - Sugar Land TX, US
Emanuel Stamatakis - Houston TX, US
Eric Davis - Houston TX, US
Steve Cliffe - Stonehaven, GB

Assignee:

M-I LLC - Houston TX

International Classification:

E21B021/00
C09K007/02

US Classification:

175 64, 175 65, 175 72, 507133, 507140, 507145, 507905

Abstract:

A water-base drilling fluid for use in drilling wells through a formation containing a shale which swells in the presence of water. The drilling fluid preferably includes: an aqueous based continuous phase, a weight material, and a shale hydration inhibition agent having the formula:HN—R—{OR′}—Y. [HB]in which R and R′ are alkylene groups having 1 to 6 carbon atom and x is a value from about 1 to about 25. The Y group should be an amine or alkoxy group, preferably a primary amine or a methoxy group. The acid HB is a protic acid selected from the group consisting of inorganic acids and organic acids, illustrative examples of which include: hydrochloric, hydrobromic, sulfuric, phosphoric, nitric, boric, perchloric, formic, acetic, halogenated acetic, propionic, butyric, maleic, fumeric, glycolic, lactic, citric and combinations of these. The shale hydration inhibition agent should be present in sufficient concentration to reduce the swelling of the shale. Also inclusive of the present invention is a method of reducing the swelling of shale clay encountered during the drilling of a subterranean well, the method comprising circulating in the well a water-base drilling fluid formulated in accordance with the present invention.

US Patent:

7084092, Aug 1, 2006

Filed:

Aug 25, 2003

Appl. No.:

10/647830

Inventors:

Arvind D. Patel - Sugar Land TX, US
Emanuel Stamatakis - Houston TX, US
Eric Davis - Houston TX, US
Jim Friedheim - Spring TX, US

Assignee:

M-I L.L.C. - Houston TX

International Classification:

C09K 8/12

US Classification:

507133, 507246, 507922

Abstract:

A water-base fluid for use in drilling, cementing, workover, fracturing and abandonment of subterranean wells through a formation containing a shale which swells in the presence of water. In one illustrative embodiment, the drilling fluid includes, an aqueous based continuous phase, a weighting agent, and a shale hydration inhibition agent. The shale hydration inhibition agent should have the general formula:in which A is independently selected from H and CHCHCHNH; and in which B is independently selected from H, CHCHOH, CHCHOCHCHCHNHand CHCHCHNH. The shale hydration inhibition agent is present in sufficient concentration to substantially reduce the swelling of shale drilling cuttings upon contact with the drilling fluid. The drilling fluid may be formulated to include a wide variety of components of aqueous based drilling fluids, such as weighting agents, fluid loss control agents, suspending agents, viscosifying agents, rheology control agents, as well as other compounds and materials known to one of skill in the art. The fluids may also be used in the disposal by reinjection of drilling cutting into a selected subterranean disposal formation.