초록 ▼

An apparatus, method and system for communicating information between downhole equipment (40) and surface equipment is disclosed. The electromagnetic signal repeater apparatus (34, 36) comprises a housing (102) that is securably mountable to the exterior of a pipe string (30) disposed in a wellbore

An apparatus, method and system for communicating information between downhole equipment (40) and surface equipment is disclosed. The electromagnetic signal repeater apparatus (34, 36) comprises a housing (102) that is securably mountable to the exterior of a pipe string (30) disposed in a wellbore (32). The housing (102) includes first and second housing subassemblies (104, 106). The first housing subassembly (104) is electrically isolated from the second housing subassembly (106) by a gap subassembly (108) having a length that is at least two times the diameter of the housing (102). The first housing subassembly (104) is electrically isolated from the pipe string (30) and is secured thereto with a nonconductive strap (120). The second housing subassembly (106) is electrically coupled with the pipe string (30) and is secured thereto with a conductive strap (122). An electronics package (127) and a battery (126) are disposed within the housing (102). The electronics package (127) receives, processes and retransmits the information being communicated between the downhole equipment (40) and the surface equipment via electromagnetic waves (46, 48, 50).

대표청구항 ▼

[ What is claimed is:] [1.] A system for communicating information between downhole equipment in a wellbore and surface equipment comprising:a pipe string extending downhole into the wellbore;a downhole device for receiving and transmitting electromagnetic signals;a surface device for receiving and

[ What is claimed is:] [1.] A system for communicating information between downhole equipment in a wellbore and surface equipment comprising:a pipe string extending downhole into the wellbore;a downhole device for receiving and transmitting electromagnetic signals;a surface device for receiving and transmitting electromagnetic signals; andan electromagnetic signal repeater including a housing securably mountable exteriorly of the pipe string and an electronics package electrically coupled to the housing for processing the information received in an electromagnetic input signal received by the housing and generating an output signal carrying the information to be electromagnetically retransmitted by the housing, the housing including first and second housing subassemblies, the first housing subassembly electrically isolated from the second housing assembly and the pipe string, the second housing subassembly electrically coupled with the pipe string.