??? ???? ?? ??? ???? ??? ?????? ????? ?????? ??????? ???? ?? ?? ????? ????? ??? PDM ???????? ?? ????? ???????, ???? ????????? ???????? ?? ??? ?????? ????. ????? ?? ??? ?????? ????????? ????? ???? ?????????? ????. ???? ???? ???? ?? ?????? ?- PDM ??????? ?? ??? ????? ???????.
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???? 1: ????? ????? ??? ?? ?? ?? ????? PDM
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![???? ??? PDM]( "PDM mud motor")
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????? ?? ??? ????? ?????? ????? cavitation ??????? ?? ?????? ?????? ?? ????? ?????? ???????. ????? ??? ?????????? ????? ?????? ???? ??????? ??????, ????? ???? ??? ?? ?????? ?????. ????? ????? ????? ????? ?? ???? ?????? ??? ????? ?? ????????. ????? ????? ???? ???? ?? ???? ???? ?? ????? ?????? ?? ?????? ???????.
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????? ?????? ????? ?????? ROP ????? ????
????? ????? ???? (ROP) ????? ?? ????????????? ?? ?? ????? ????? PDM, ????? ?????, ????? ???????. ????? ?????? ????? ?????? ????? ?? ????? ?????? ????? ??????? ???. ??????? ?????? ???? ????? ???? ????? ??????? ?????? ???? ?????? ?????? ????. ?? ?? ????? ?? ??????? ???????? ?? ????? ????? ????? ???????.
????? ??????? ?? ????? ?????? PDMs ??????? ?????
?????, ????? ?????? ???? ?? ????? ??? PDM ?????? ??????? ???? ??????. ?????? ??????? ???? ??????? ?? ????? ???????, ???????? ?? ?????? ?????? ?????? ????? ?????? ?????? ????. ????? ????? ?????? ?????? ?? ????? ???? ????????. ????? ??????? ???? ????? ?? ??????? ???????? ??? ??????? ????????.
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?????? ?????? ?????? ?????? ?? ????????? ????? 30-40% ??? ????? ?????? ???? (????? ?????). ??????? ????? ????? ?? ???????? ??? ??????, ???????? ?? ??? ??????. ???????? ??? ???????? ?????? ???? ?? ??? ????? ?????. ?? ????? ?? ???????? ???????? ?? ????? ??????? ??? ?????.
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????? ???? ???? ????? ?? PDM ??? ????? ?????? ???? ????. ???? ?? ??????? ?????, ?????? ??????? ???????? ?????? ?? ???????. Weifang Shengde Petroleum Machinery Manufacturing Co., Ltd. ???? ????? ??? PDM ??????? ???????? ?? ??? ?????? ???????? ?? ????????. ??????? ???? ?????? ?????? ???????, ??????? ??? ???? ??????? ????? ???.
????? ??????
?: ??? ???? ??? PDM?
?: ???? ??? PDM ???? ??? ????? ???? ?? ??. ?? ???? ?? ?????? ?- PDM ??????? ????? ??? ?????? ????????.
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?: ?????? ??????, ??????????? ?????? ??????? ???? ?????? ???? ????????, ?? ?????? ???? PDM ???????? ???? ????.
