公开(公告)号：US20190048683A1

公开(公告)日：2019-02-14

申请号：US15763790

申请日：2016-09-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kristi M. Gangelhoff ,  Ignatius A. Kadoma ,  Polina R. Ware ,  Mary Beth Forester ,  Michael D. Crandall ,  Yong K. Wu ,  Siegmund Papp

IPC: E21B33/12 ,  E21B29/02

Abstract: Provided are sealing elements useful for isolating or diverting segments of a well in a hydraulic fracturing operation. These sealing elements resist the extreme temperatures and pressures encountered within a well, yet can be degraded or dissolved when no longer needed without use of hazardous acids or other chemicals. The sealing elements are made from a composite containing one or more resins of polylactic acid combined with a degradant that can be customized to provide facile degradation of the sealing element over a wide range of operative temperatures and pressures. These compositions may optionally include a swellant that causes the sealing element to expand after being seated against a well perforation or passageway to provide an enhanced seal.

公开(公告)号：US20180169977A1

公开(公告)日：2018-06-21

申请号：US15735762

申请日：2016-06-10

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Yong K. Wu ,  Siegmund Papp ,  Andrew J. Peterson

IPC: B29C70/66 ,  B29C70/44 ,  E21B17/01

CPC classification number: B29C70/66 ,  B29C70/44 ,  B29K2063/00 ,  B29K2105/04 ,  B29K2105/251 ,  B29K2509/08 ,  B29L2031/706 ,  E21B17/012

Abstract: Buoyancy modules (200) are made from a foam composition that includes a combination of a thermally fusable powder and glass microspheres heated in a manner that provides a hardened syntactic foam having both low density and a high degree of compressive strength. An outer barrier (220) may enclose the buoyancy module.