公开(公告)号：EP3832067A1

公开(公告)日：2021-06-09

申请号：EP19214214.9

申请日：2019-12-06

申请人： Nov Subsea Products AS

发明人： HOSTMARK, Rune ,  HOLBERG, Christian ,  MARTINSEN, Morten

IPC分类号： E21B37/02 ,  B08B9/02 ,  B08B9/053 ,  F16L55/38 ,  F16L55/46

摘要： It is disclosed a pig drive (110) and a pig drive system (100) for feeding a pig (120) into a pig kicker section of a pipe (200) and a method for using same.
Wherein the pig drive (110) comprises:
- a piston (111) with a radial direction and an axial direction;
- a rod (112) connected to the piston (111) and extending in the axial direction of the piston (111),
wherein the rod (112) has a distal end adapted to interface a pig (120);
- a retainer (113) slidably connected to the rod (112) and adapted to interface a retainer abutment (132); and
- a biasing device (114) arranged to bias the retainer (113) towards the distal end of the rod (112).