Metal seals and plugs, namely, a downhole tool in the form of a plug for sealing a wellbore

'downhol':7 'form':11 'metal':1 'name':5 'plug':4,14 'seal':2,16 'tool':8 'wellbor':18

Non-metal downhole tool in the form of fracturing plugs composed of plastic, composite and elastomeric materials for controlling pressure or fluids downhole for sealing a wellbore

'compos':12 'composit':15 'control':20 'downhol':4,24 'elastomer':17 'fluid':23 'form':8 'fractur':10 'materi':18 'metal':3 'non':2 'non-met':1 'plastic':14 'plug':11 'pressur':21 'seal':26 'tool':5 'wellbor':28

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