公开(公告)号：EP1377725B1

公开(公告)日：2005-08-17

申请号：EP02717610.6

申请日：2002-03-13

申请人： BAKER HUGHES INCORPORATED

发明人： HAHN, Detlef ,  PETERS, Volker ,  ROUATBI, Cedric

IPC分类号： E21B1/00

CPC分类号： E21B47/182 ,  E21B47/18 ,  H04L1/0001 ,  H04L27/0008 ,  Y10T137/5109

摘要： A reciprocating mud pulser system comprising a poppet (103) and a stationary valve assembly (25) with axial flow passages (109). The poppet (103) reciprocates close to the valve assembly, blocking the flow through the valve assembly and generating oscillating pressure pulses. The poppet (103) passes through two zero speed positions per cycle, enabling rapid changes in signal phase, frequency, and/or amplitude thereby facilitating enhanced data encoding like ASK, PSK or FSK . The poppet (103) is driven by a linear electric motor (104) disposed in a lubricant filled housing (108). The housing to shaft seal consists of bellows (107). A force balance spring (105) is used to offset the hydraulic forces on the poppet (103). A bypass poppet (160) is used to adjust the differential pressure across the valve assembly.

公开(公告)号：EP1377725A2

公开(公告)日：2004-01-07

申请号：EP02717610.6

申请日：2002-03-13

申请人： BAKER HUGHES INCORPORATED

发明人： HAHN, Detlef ,  PETERS, Volker ,  ROUATBI, Cedric

IPC分类号： E21B1/00

CPC分类号： E21B47/182 ,  E21B47/18 ,  H04L1/0001 ,  H04L27/0008 ,  Y10T137/5109

摘要： A reciprocating mud pulser system comprising a poppet (103) and a stationary valve assembly (25) with axial flow passages (109). The poppet (103) reciprocates close to the valve assembly, blocking the flow through the valve assembly and generating oscillating pressure pulses. The poppet (103) passes through two zero speed positions per cycle, enabling rapid changes in signal phase, frequency, and/or amplitude thereby facilitating enhanced data encoding like ASK, PSK or FSK . The poppet (103) is driven by a linear electric motor (104) disposed in a lubricant filled housing (108). The housing to shaft seal consists of bellows (107). A force balance spring (105) is used to offset the hydraulic forces on the poppet (103). A bypass poppet (160) is used to adjust the differential pressure across the valve assembly.

公开(公告)号：EP1379757B1

公开(公告)日：2006-02-15

申请号：EP02706433.6

申请日：2002-02-27

申请人： BAKER HUGHES INCORPORATED

发明人： HAHN, Detlef ,  PETERS, Volker ,  ROUATBI, Cedric

IPC分类号： E21B47/18

CPC分类号： E21B47/182 ,  E21B47/18 ,  G01V11/002

摘要： An anti-plugging oscillating shear valve system for generating pressure fluctuations in a flowing drilling fluid comprising a stationary stator and an oscillating rotor, both with axial flow passages. The rotor (103) oscillates in close proximity to the stator (102), at least partially blocking the flow through the stator and generating oscillating pressure pulses. The rotor passes through two zero speed positions during each cycle, facilitating rapid changes in signal phase, frequency, and/or amplitude facilitating enhanced data encoding. The rotor is driven by an electric motor (104) disposed in a lubricant filled housing (108). In one embodiment, the housing to shaft seal is a flexible bellows (107). In one embodiment, a torsional spring (105) is attached to the motor and the resulting spring mass system is designed to be near resonance at the desired pulse frequency. The torsion spring may be a solid torsion bar or a magnetic spring.