초록 ▼

A safety module which is intended to be used in an oil or gas production installation and to be lowered to a required depth with an electrically operable tool connected thereto, and which comprises a housing (2), a pressure sensitive switch (3) and a temperature sensitive switch in the housing which

A safety module which is intended to be used in an oil or gas production installation and to be lowered to a required depth with an electrically operable tool connected thereto, and which comprises a housing (2), a pressure sensitive switch (3) and a temperature sensitive switch in the housing which are adapted to switch at predetermined pressure and temperature values respectively, in which the pressure sensitive switch and the temperature sensitive switch only allow an electrical command signal to be conveyed to the tool when the pressure and temperature both reach the predetermined pressure and temperature values.

대표청구항 ▼

[ We claim:] [1.] A safety module for use in an oil or gas production installation and intended to be lowered to a required depth with an electrically operable tool connected thereto, said module comprising:a housing;a pressure sensitive switch in the housing for switching at a predetermined pressur

[ We claim:] [1.] A safety module for use in an oil or gas production installation and intended to be lowered to a required depth with an electrically operable tool connected thereto, said module comprising:a housing;a pressure sensitive switch in the housing for switching at a predetermined pressure value; and,a temperature sensitive switch in the housing for switching at a predetermined temperature value;wherein said pressure sensitive switch and said temperature sensitive switch only allow an electrical command signal to be conveyed to the tool when the pressure and temperature both reach the predetermined pressure and temperature values.