Drilling fluid containing microspheres and use thereof

a technology of drilling fluid and microspheres, which is applied in earth drilling and mining, chemistry apparatus and processes, and well accessories, etc., can solve problems such as pumping problems, and achieve the effects of reducing the density of the material, reducing the pressure required, and reducing the associated pumping cos

Inactive Publication Date: 2005-06-09
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] The present invention provides a drilling fluid composition comprising a drilling fluid vehicle, which may be oil- or water-based, and a composite microsphere component. The microspheres of the composite microsphere component may comprise any hollow microspheres of glass, ceramic or plastic that may be added to the drilling fluid (with other components of the drilling fluid known in the art) to reduce the density thereof. Generally the composite microsphere component is added to the drilling composition in amounts sufficient to reduce the density at

Problems solved by technology

Microsphere composites having sizes in excess o

Method used

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  • Drilling fluid containing microspheres and use thereof

Examples

Experimental program
Comparison scheme
Effect test

examples

Glossary

[0096] A-174 Silane; 3-(trimethoxysilyl)propyl methacrylate, available from Dow Corning; Midland Mich. [0097] Adflex™ KS-359; polyproplylene available from Basell, Wilmington, Del. Blox™ 220; high adhesion thermoplastic epoxy resin, Dow Chemical Co., Midland, Mich. [0098] Cumene hydroperoxide; C6HSC(CH3)2OOH; available from Sigma-Aldirch, Milwaukee, Wis. [0099] Irgacure™ 651; Methylbenzoylbenzoate, available from Ciba Specialty Chemicals, Tarrytown, N.Y. [0100] Lexan 123™; polycarbonate available from General Electric, Pittsfield, Mass. [0101] Moplen™; Polypropylene available from Basell, Wilmington, Del. [0102] SRC 7644™; Polypropylene available from Exxon / Mobil, Edison, N.J. [0103] SR 351™; Trimethylolpropane triacrylate, available from Sartomer, Exton, Pa. [0104] RD 710™; Phenylic resin, available from 3M Company, St. Paul, Minn.

Test Methods

Glass Microsphere Strength Test

[0105] An APP strength tester (available from Advanced Pressure Products, Ithaca, N.Y.) was use...

examples 6-10

Absorbency of Composites to Drilling Fluids

[0110] For Examples 6-10 composite microspheres (1.0 g) were placed in drilling fluids (10.0 g; available from Halliburton Energy Services) as identified in Table 2. The sample was allowed to set at room temperature for four days. The mixtures were then filtered through a 250 mesh screen, and the solid composite microsphere material was allowed to drain for 1 hour. The composite microsphere sample was then weighed (wf) and % wt gain was calculated using the formula: %⁢ ⁢Wt⁢ ⁢Gain=wf-1.01.0×100

[0111] Results are listed in Table 2.

TABLE 2% weight gain of microsphere composites in various drilling fluids.% Wt% Wt% WtGainGain% WtGainPetrofreePetrofreeGainExamplePolymerPetrofreeLVSFLVT 2006Blox ™ 2206.33.04.83.47Moplen ™13.615.717.813.98SRC 764417.718.522.928.69Adflex ™55.157.565.293.0KS-35910Lexan ™2.04.31.71.0

examples 11-13

Preparation of Composite Microspheres with Acrylate Polymers

[0112] The composites were prepared as described in U.S. Pat. No. 6,620,214.

Procedure #1: General Procedure for Making a Composite Microsphere Precursor Slurry

[0113] A slurry was prepared by thoroughly mixing glass microspheres, acrylate resin, and initiators, using a mixer (obtained from Hobart Corporation, Troy, Ohio; model number A120T). Specific formulation can be found in Table 3. The abrasive slurry was mixed in the mixer on low speed using a flat-beater style impeller for 30 minutes and heated to a temperature within the range from about 90° F. (32° C.) to about 120° F. (49° C.) due to mechanical heating and heat of reaction. At this point, the abrasive slurry was very thick with cement-like handling characteristics. The mixed slurry was then placed in a refrigerator for at least 45 minutes to cool before further processing. The temperature of the refrigerator was in the range from about 40° F. (4° C.) to about 4...

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Abstract

The present invention provides a drilling fluid composition and a method of drilling comprising a drilling fluid, which may be oil- or water-based, and a composite microsphere component. The invention drilling fluid composition advantageously reduces the density of a conventional fluid, reduces costs associated with pumping and overcomes problems associated with conventional gas-injection processes. The invention uses conventional drilling and pumping equipment, requires no sea-floor based pumps and may be easily pressure-controlled to maintain the pressure of the fluid.

Description

[0001] This application is a continuation of U.S. Ser. No. 10 / 218,962, filed Aug. 14, 2002, now pending, the disclosure of which is herein incorporated by reference.[0002] This invention relates to a novel drilling fluid composition and use thereof in drilling wells for petroleum and natural gas. BACKGROUND [0003] In oil drilling operations, a drilling fluid is circulated downwardly through a drill string to cool and lubricate the drill string, suspend the cutting removed from the well bore and to keep out formation fluids. The drilling fluid containing the suspending cuttings are further circulated upwardly through the annulus between the drill string and wall of the well bore to the surface, where the cutting are separated and the recycled drilling fluid is circulated down the bore. Drilling fluids, also known as drilling muds, may be oil- or water-based. Both water-based and oil-based drilling fluid systems are known. The more economical water-based systems are used when practica...

Claims

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Application Information

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IPC IPC(8): C09K8/03
CPCC09K8/03Y10S507/901C09K8/032C09K8/02
Inventor SHINBACH, MADELINE P.NWABUNMA, DOMASIUSCHAN, HUA T.D'SOUZA, ANDREW S.
Owner 3M INNOVATIVE PROPERTIES CO
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