peak - pilo
- perforation depth
- perforation job
- perforation plugging
- performance
- performance of services
- performance period
- performance reward system (merit pay)
- performance time
- Period of roll
- periodic duty
- periodic inspection
- peripheral waterflood
- peripheral waterood (ing) / water injection
- periphyton
- peristaltic pump
- perlite insulation
- permafrost formation
- permafrost layer
- permafrost soil
- permanent completion
- Permanent guide base
- permanent labour safety commission
- permanent mooring base
- permanent packer
- Permanent rigid base assembly
- permanent type bridge plug
- permeability and porosity
- permeability anisotropy
- permeability blocker
- permeability test
- permeable rocks / zone
- permeation tube
- permissible exposure limit
- permissible exposure limits
- permissible range
- permit approval document
- permit control room
- permit to drill
- persistance
- personal protective equipment
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