Бурение грунтовых зондов, установка энергетических колодцев

The lengths of pipe sections are specified by API RP 5B1 (1988). in three major ranges: Rl, R2 and R3. as shown in Table 1.3.

Generally, casing is run in R3 lengths to reduce the number of connections in the string, a factor that minimizes both rig time and the likelihood of joint failure in the string during the life of the well (joint failure is discussed in more detail on page 18). R3 is also easy to handle on most rigs because it has a single joint.

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