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| technical string (ABelonogov); surface pipe (the first string of casing set in a well after the conductor pipe, varying in length from a few hundred feet to several thousand. Some states require a minimum length to protect fresh-water sands. Compare conductor pipe. Bab GofPI Alexander Demidov); intermediate casing (A casing string that is generally set in place after the surface casing and before the production casing. The intermediate casing string provides protection against caving of weak or abnormally pressured formations and enables the use of drilling fluids of different density necessary for the control of lower formations. SLB G Alexander Demidov) | |||
| optional intermediate casing (MichaelBurov); service casing (MichaelBurov) | |||
| intermediate casing string (MichaelBurov); salt string (MichaelBurov); service string (MichaelBurov) | |||
| protective casing (string) | |||
| surface casing; surface casing (Group Detailed Design) | |||
| protecting string; protection string; protective string; protector string | |||
| техническая колонна: 18 phrases in 7 subjects |
| Drilling | 1 |
| General | 4 |
| Oil / petroleum | 4 |
| Oil and gas | 5 |
| Oilfields | 1 |
| Production | 1 |
| Technology | 2 |