A method of removing a downhole assembly comprises contacting, in the presence of an
electrolyte, a first article comprising a first material and acting as an anode, and a second …

A metallic powder is disclosed. The metallic powder includes a plurality of metallic powder
particles. Each powder particle includes a particle core. The particle core includes a core …

A method of removing a corrodible downhole article having a surface coating includes
eroding the surface coating by physical abrasion, chemical etching, or a combination of …

(56) References Cited 4,938,809 A 7, 1990 Das et al. 4,944,351 A 7, 1990 Eriksen et al. US
PATENT DOCUMENTS 4,949,788 A 8, 1990 SZarka et al. 4,952,902 A 8/1990 Kawaguchi et …

(56) References Cited 4,977,958 A 12, 1990 Miller 4,981,177 A 1/1991 Carmody et al. US
PATENT DOCUMENTS 4,986,361 A 1/1991 Mueller et al. 4,997,622 A 3/1991 Regazzoni et …

(57) ABSTRACT A seal includes a metal composite that has a cellular nano matrix that
includes a metallic nanomatrix material, a metal matrix disposed in the cellular nanomatrix …

The method includes forming a coated metallic powder com prising a plurality of coated
metallic powder particles having particle cores with nanoscale metallic coating layers …

A powder metal composite is disclosed. The powder metal composite includes a
substantially-continuous, cellular nanomatrix comprising a nanomatrix material. The …

2,754,910 2.983, 634 3.057, 405 3,106,959 3,152,009 3,196,949 3,242.988 3,316,748
3,326,291 3,347,317 3,347,714 3,390,724 3,395,758 3,406,101 3,343,537 3,465,181 …

3,106,959 3,152,009 3,196,949 3,242.988 3,316,748 3,326,291 3,347,317 3,347,714
3,390,724 3,395,758 3,406,101 3,434,537 3,465,181 3,513,230 3,637,446 3,645,331 …