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Method of servicing a wellbore with a sealant composition comprising solid latex

a technology of solid latex and wellbore, which is applied in the direction of sealing/packing, wellbore/well accessories, chemistry apparatus and processes, etc., can solve the problems of increasing the cost of the overall operation, reducing the diameter of the well, and difficult to achieve the service provided by such fluids

Inactive Publication Date: 2007-05-17
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method of servicing a wellbore by using a sealant composition made of solid latex. The technical effect of this method is to provide a reliable and effective way to seal the wellbore, preventing leaks and ensuring the safety and integrity of the well.

Problems solved by technology

As a result, the service provided by such fluids is more difficult to achieve.
Also, the loss of such fluids increases the cost of the overall operation due to the prolonged rig time required, the fluids being relatively expensive, and possibly a need to install additional casing.
This may result in a reduced well bore diameter from that point forward resulting in a smaller than planned pipe across the production intervals.
During production, these reduced production pipe string diameters induce high friction pressures that restrict or limit production rates and negatively effect well production economics.
In the case of the two stream processes, preparing the latex-containing stream is operationally cumbersome and requires mixing an aqueous latex fluid, an aqueous stabilizing liquid surfactant and a dry solids blend prior to placing in a wellbore.
Also, there can be a substantial costs incurred for the shipping, storing and handling of latex emulsions.
Furthermore, latex emulsions and the aqueous stabilizing surfactants present potential spill and leak related health, safety and environment (HSE) hazards.
Use of aqueous latex emulsion requires more complex mixing operations.

Method used

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  • Method of servicing a wellbore with a sealant composition comprising solid latex
  • Method of servicing a wellbore with a sealant composition comprising solid latex
  • Method of servicing a wellbore with a sealant composition comprising solid latex

Examples

Experimental program
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Effect test

example 1

[0052] A sealant composition containing a solid latex and no cementitious material was prepared and the mechanical properties of the composition determined. A reconstituted solid latex emulsion was prepared by (a) blending a styrene-butadiene latex powder (33 grams) supplied by Rhodia Corporation as 04-OF-006 with a solid blend (40 grams) FLEXPLUG OBM lost circulation material which contains an organophilic clay; a viscosifying polymer xanthan gum; a particle dispersing sulfonated naphthalene-formaldehyde condensate; and sodium carbonate and is commercially available from Halliburton Energy Services (b) mixing the dry blend with water (95 ml) containing the liquid stabilizer surfactant (7.5 ml) sold as STABILIZER 434C latex stabilizer and D-AIR 3000L antifoaming agent which is a defoamer both available from Halliburton Energy Services. The mixture was stirred until the viscosity and rheology of the emulsion stabilized.

[0053] Sealant composition sample A was formed by mixing the sta...

example 2

[0055] A sealant composition similar to Sample A containing a solid latex and no cementitious material was prepared and the mechanical properties of the composition determined as described in EXAMPLE 1. However, the composition did not contain the liquid stabilizer surfactant STABILIZER 434C latex stabilizer. The final results were similar to those described in Example 1 in which the stabilizing surfactant was used. These observations suggest that stabile emulsions can be obtained without using the surfactants.

example 3

[0056] The ability of the sealant compositions containing a solid latex to prevent water-based mud (WBM) losses was examined. A solid latex suspension was formed by (a) blending styrene-butadiene latex powder (48 grams) with a solid blend (220 grams) containing an organophilic clay CLAYTONE II organophilic bentonite which is an organoclay commercially available from Southern Clay Products, a viscosifying polymer xanthan gum, and bentonite and (b) mixing the dry blend with a nonaqueous fluid such as diesel (350 ml). The slurry was then mixed with a WBM (350 ml). The resulting mixture formed a viscous mass with a yield point similar to a system that did not contain the dry latex however the surface of the viscous mass had a slick sheen created by the latex. The results demonstrate the ability of the sealant composition containing a solid latex to form a viscous mass when contacted with a WBM. Furthermore, the surface coating on the viscous mass could reduce the plastic viscosity of th...

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Abstract

A method of servicing a wellbore comprising placing a sealant composition comprising solid latex into the wellbore.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is related to commonly owned U.S. patent application Ser. No. 10 / ______, [Attorney Docket No. 2005-IP-017357U1] entitled “Sealant Compositions Comprising Solid Latex,” filed on the same date as the present application and incorporated by reference herein.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] This invention relates to servicing a wellbore. More specifically, it relates to the use of solid latex in wellbore servicing fluids. [0005] 2. Background of the Invention [0006] Natural resources such as gas, oil, and water residing in a subterranean formation or zone are usually recovered by drilling a wellbore down to the subterranean formation while circulating a drilling fluid in the wellbore. After terminating the circulation of the drilling fluid, a string of pipe, e.g., casing, is run in the wellbore. The dril...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K8/508C09K8/588
CPCC09K8/24C09K8/32C09K8/5045C09K8/508C09K8/512
Inventor REDDY, B. RAGHAVASWEATMAN, RONALD E.GORDON, CHRIS L.
Owner HALLIBURTON ENERGY SERVICES INC