Wellbore Quality Characterization for Drilling and Casing Running in ...
Wellbore Quality Characterization for Drilling and Casing Running in ...
Wellbore Quality Characterization for Drilling and Casing Running in ...
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<strong>Wellbore</strong> <strong>Quality</strong> Scorecard – Guidel<strong>in</strong>es<br />
<strong>Drill<strong>in</strong>g</strong> Response (5 po<strong>in</strong>ts)<br />
Severe drill<strong>in</strong>g problems<br />
- stuck pipe<br />
- near stuck pipe <strong>in</strong>cident<br />
Score<br />
Transient drill<strong>in</strong>g problems<br />
- poor hole clean<strong>in</strong>g with high cutt<strong>in</strong>gs bed<br />
2<br />
- severe pack-off<br />
2<br />
- severe loss circulation<br />
2<br />
- erratic torque <strong>and</strong> drag response<br />
3<br />
Torque <strong>and</strong> drag response<br />
- all parameters follow smooth trend<br />
- lower than expected torque <strong>and</strong> drag<br />
F<strong>in</strong>al Trip-out Response (7 po<strong>in</strong>ts)<br />
0<br />
1<br />
4<br />
5<br />
Score<br />
Stuck pipe 0<br />
Residual cutt<strong>in</strong>gs bed / differential stick<strong>in</strong>g<br />
- section length with overpulls > 100 klbs<br />
- section length with overpulls > 50 klbs<br />
Ledges<br />
- isolated overpulls > 100 klbs<br />
- isolated overpulls > 50 klbs<br />
1<br />
2<br />
3<br />
4<br />
<strong>Cas<strong>in</strong>g</strong> <strong>Runn<strong>in</strong>g</strong> Response (8 po<strong>in</strong>ts)<br />
Severe cas<strong>in</strong>g runn<strong>in</strong>g problems<br />
- stuck cas<strong>in</strong>g<br />
- cas<strong>in</strong>g pulled due to downhole problems<br />
Score<br />
Differential stick<strong>in</strong>g environment<br />
- static friction > 100 klbs on connections 1<br />
- static friction > 50 klbs on connections 2<br />
Intervention needed dur<strong>in</strong>g cas<strong>in</strong>g run<br />
- unplanned rotation needed<br />
3<br />
- unplanned circulation needed<br />
4<br />
- jo<strong>in</strong>ts wiped to reduce drag 5<br />
<strong>Cas<strong>in</strong>g</strong> run without significant problems<br />
- elevated but smooth drag levels<br />
6<br />
- achieved expected drag levels<br />
7<br />
- better than expected drag levels 8<br />
Transient tripp<strong>in</strong>g-out problems<br />
- loss circulation<br />
5<br />
- unplanned circulation<br />
5<br />
- unplanned ream<strong>in</strong>g <strong>and</strong> back-ream<strong>in</strong>g 5<br />
Drag response<br />
- smooth drag levels measured throughout<br />
- better than expected drag levels recorded<br />
0<br />
0<br />
6<br />
7
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