添加剂
发表于 2025-3-21 19:14:40
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休息
发表于 2025-3-21 20:22:52
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Occlusion
发表于 2025-3-22 04:02:57
Positive Displacement Motors,her tool pioneered largely by the Russians. An electric cable was run down the drill string to power an electric motor mounted above the bit. The motor drove the bit through a gearing mechanism. Although the possibilities of using electrodrills are still being investigated, no commercial tool is presently in use.
溺爱
发表于 2025-3-22 06:03:35
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大雨
发表于 2025-3-22 10:18:25
https://doi.org/10.1007/978-3-658-38249-0es Δ., Δ., Δ. between the successive survey stations must be calculated. With the coordinates of the upper station known, the coordinates of the lower station can be found by addition. The horizontal coordinates of a point are referred to as the “Northing” (or latitude) and the “Easting” (or departure).
挫败
发表于 2025-3-22 16:34:40
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挫败
发表于 2025-3-22 18:59:37
Textbook 1987enbury method, and no doubt thinking to myself that I was at the very forefront of technology. During the intervening period it has become obvious to many of us that some of the most significant technical advances in the oil business have been made in drilling, and particularly in the fields of offs
corpuscle
发表于 2025-3-22 22:05:48
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exigent
发表于 2025-3-23 03:39:02
Current and Future Developments,more hostile environments and deeper offshore waters. Directional drilling is likely to play an increasingly important role in satisfying the world’s demand for oil and natural gas over the next few decades.
打算
发表于 2025-3-23 09:18:09
y the Stokenbury method, and no doubt thinking to myself that I was at the very forefront of technology. During the intervening period it has become obvious to many of us that some of the most significant technical advances in the oil business have been made in drilling, and particularly in the fiel