A、the total weight in air of the casing string is removed from the ship
B、the hook load (weight of the casing string) is removed from the ship
C、the weight of the casing inside the riser is removed from the ship
D、the weight of the casing string added to the weight of the fill-up mud is removed from the ship
更多“At the instant when a string of casing being run from a ship is landed in the well head,（）.”相关的问题
A、decelerating when lowering the load B、decelerating when raising the load C、lowering the load at constant speed D、raising the load at constant speed
A、when the Moon is low in the sky at rising or setting B、at the new Moon phase C、when taking Moon sights during daylight D、when the terminator is nearly vertical
A、at the start of spring，when the Sun is nearly over the equator B、only when the Sun and Moon are on the same side of the Earth and nearly in line C、when the Sun and Moon are at approximately 90°to each other as seen from the Earth D、when the Sun，Moon，and Earth are nearly in line，in any order
A、only when the load is taken off the cable B、only when there is a load on the cable C、only when activated by the controls at the lowering station D、at any time
A、only when the load is taken off the cable B、only when there is a load on the cable C、only when activated by the controls at the lowering station D、at any time
A、only when the load is taken off the cable B、only when there is a load on the cable C、only when activated by the controls at the lowering station D、at any time
A、at the start of spring，when the Sun is nearly over the equator B、only when the Sun and Moon are on the same sides of the Earth and are nearly in line C、when the Sun and Moon are at approximately 90°to each other，as seen from the Earth D、when the Sun，Moon，and Earth are nearly in line，regardless of alignment order
A、At the start of spring，when the Sun is nearly over the equator B、Only when the Sun and Moon are on the same sides of the Earth and are nearly in line C、When the Sun and Moon are at approximately 90° to each other，as seen from the Earth D、When the Sun，Moon，and Earth are nearly in line，regardless of alignment order
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