Invention Grant
- Patent Title: Coated and cured proppants
- Patent Title (中): 涂层和固化的支撑剂
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Application No.: US13188530Application Date: 2011-07-22
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Publication No.: US09040467B2Publication Date: 2015-05-26
- Inventor: Robert Ray McDaniel , Avis Lloyd McCrary
- Applicant: Robert Ray McDaniel , Avis Lloyd McCrary
- Applicant Address: US PA Radnor
- Assignee: Preferred Technology, LLC
- Current Assignee: Preferred Technology, LLC
- Current Assignee Address: US PA Radnor
- Agency: Pepper Hamilton LLP
- Main IPC: C09K8/60
- IPC: C09K8/60 ; C09K8/36 ; E21B43/267 ; C09K8/80

Abstract:
Solid proppants are coated with a coating that exhibits the handling characteristics of a precured coating while also exhibiting the ability to form particle-to-particle bonds at the elevated temperatures and pressures within a wellbore. The coating includes a substantially homogeneous mixture of (i) at least one isocyanate component having at least 2 isocyanate groups, and (ii) a curing agent. The coating process can be performed with short cycle times, e.g., less than about 4 minutes, and still produce a dry, free-flowing, coated proppant that exhibits low dust characteristics during pneumatic handling but also proppant consolidation downhole for reduced washout and good conductivity.
Public/Granted literature
- US20120283153A1 COATED AND CURED PROPPANTS Public/Granted day:2012-11-08
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