The utility model relates to a horizontal well well logging technical field, in particular to rotatable combination formula water conservancy power conveyor. The device's hydraulic set main part left end is equipped with the attach fitting, and the cover is equipped with rotatory copper ring in the hydraulic set main part, and the dynamic ring cover of rotatory copper ring outside suit, holding ring keep off on power ring cover right side, are equipped with protruding key on the hydraulic set main part right-hand member face, and in this protruding key inserted the left side locating hole of holding ring, in the location ring key inserted the right side locating hole of holding ring, the interior step of location ring key matched with the outer step of tail cover. The utility model discloses an only need change the different hydraulic set main parts that connect to different instruments, the other part need not be changed, changes convenient and fast, practices thrift the cost, increases rotatory copper ring, can effectively avoid the hydraulic set to meet card dropout phenomenon and take place, breaks the safety protection round pin when card is met to the ring cover, avoids cutting the cable and salvages instrument, the construction of effectual assurance safety.