Term
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Definition
| Making the well ready to produce oil and gas under controlled pressures and flow rates. |
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Term
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Definition
| The producing formation is left unsupported by casing because the formation is strong enough (such as the case with a limestone formation)** the casing is cemented above the formation. |
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Term
| Perforated Casing or Liner |
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Definition
| Liner is run all the way down into the producing zone and holes are shot into it allowing oil and/or gas to flow into the casing. |
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Term
| Perforated or Slotted Liner |
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Definition
| Pre-perforated liner. May contain a wire-wrapped or a packed gravel protective layer to keep the sand from entering the wellbore. |
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Term
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Definition
| Involves circulating and placing carefully sized gravel into the annular space between the liner and the wellbore wall which forms a permeable layer to exclude any formation particles from the wellbore that become loose during production. **useful if the producing formation is weak. |
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Term
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Definition
| A string of pipe(tubing) through which oil and gas are produced. |
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Term
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Definition
| Permits high-pressure reservoirs to be safely controlled and produced because they are significantly stronger than conventional casing. |
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Term
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Definition
| The wellhead(christmas tree) is a series of flow-control valves, chokes and gauges mounted on spools. **The only production equipment required if the well flows without assistance. |
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Term
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Definition
| If reservoir pressure is too low to force the oil, gas and water to the surface, pumping methods are required for artificial lift. |
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