Method and system for transmitting signals through a metal tubular

A method for transmitting signals in a metal tubular having a non magnetic metal tubular section comprising:

• moving a transmitter device configured to emit electromagnetic signals through the metal tubular and through the non magnetic metal tubular section;
• emitting the electromagnetic signals during the moving step;
• and
• detecting the electromagnetic signals, or a secondary field associated with the electromagnetic signals, using an antenna positioned proximate to the non magnetic metal tubular section.

A signal transmission system comprising:

• a metal tubular;
• a non magnetic metal section on the metal tubular;
• and
• an antenna outside the tubular proximate to the non magnetic metal section configured to receive electromagnetic signals transmitted through the non magnetic metal section.

A signal transmission system comprising:

• a metal tubular having a non magnetic metal section;
• a transmitter device configured to move through the metal tubular and the non magnetic metal section and to emit electromagnetic signals through the non magnetic metal section;
• and
• an antenna outside the non magnetic metal section configured to detect the electromagnetic signals or a secondary field associated with the electromagnetic signals.

A signal transmission system in a metal tubular comprising:

• a transmitter device inside the metal tubular configured to emit electromagnetic signals;
• a non magnetic metal tubular section on the metal tubular configured to transmit the electromagnetic signals;
• an antenna outside the metal tubular proximate to the non magnetic metal tubular section configured to receive the electromagnetic signals or a secondary field associated with the electromagnetic signals;
• and
• a receiver-control circuit outside the metal tubular in electrical communication with the antenna configured to detect the electromagnetic signals or the secondary field, and to control or monitor a device or operation associated with the metal tubular.

A signal transmission system in a metal tubular comprising:

• a non magnetic metal tubular section on the metal tubular having a sidewall;
• an antenna proximate to the non magnetic metal tubular section;
• a transmitter device inside the metal tubular configured to transmit electromagnetic signals through the sidewall of the non magnetic metal tubular section to the antenna;
• and
• a circuit in signal communication with the antenna configured to detect, amplify, filter and tune the electromagnetic signals, or a secondary field associated with the electromagnetic signals.

A method for improving production in an oil and gas well having a metal tubular with a non magnetic metal section comprising:

• moving a transmitter device through the metal tubular and the non magnetic metal section while emitting electromagnetic signals therefrom;
• transmitting the electromagnetic signals through the non magnetic metal section;
• detecting the electromagnetic signals transmitted through the non magnetic metal section;
• and
• controlling or monitoring a device or an operation associated with the well responsive to the detecting step.

A method for transmitting signals in a metal tubular having a non magnetic metal tubular section comprising:

• moving a transmitter device configured to emit electromagnetic signals through the metal tubular and through the non magnetic metal tubular section;
• emitting the electromagnetic signals during the moving step;
• detecting the electromagnetic signals, or a secondary field associated with the electromagnetic signals, using an antenna positioned proximate to the non magnetic metal tubular section;
• and
• detonating a perforating device responsive to the detecting step.

A method for transmitting signals in a metal tubular having a non magnetic metal tubular section comprising:

• moving a transmitter device configured to emit electromagnetic signals through the metal tubular and through the non magnetic metal tubular section;
• emitting the electromagnetic signals during the moving step;
• detecting the electromagnetic signals, or a secondary field associated with the electromagnetic signals, using an antenna positioned proximate to the non magnetic metal tubular section;
• and
• actuating a packer device responsive to the detecting step.

A signal transmission system in a metal tubular comprising:

• a transmitter device inside the metal tubular configured to emit electromagnetic signals;
• a non magnetic metal tubular section on the metal tubular configured to transmit the electromagnetic signals;
• a non magnetic metal tubular section on the metal tubular configured to transmit the electromagnetic signals;
• an antenna outside the metal tubular proximate to the non magnetic metal tubular section configured to receive the electromagnetic signals or a secondary field associated with the electromagnetic signals;
• and
• a receiver-control circuit outside the metal tubular in electrical communication with the antenna configured to detect the electromagnetic signals or the secondary field, and to control or monitor a perforating device or operation associated with the metal tubular.

A signal transmission system in a metal tubular comprising:

• a transmitter device inside the metal tubular configured to emit electromagnetic signals;
• a non magnetic metal tubular section on the metal tubular configured to transmit the electromagnetic signals;
• a non magnetic metal tubular section on the metal tubular configured to transmit the electromagnetic signals;
• an antenna outside the metal tubular proximate to the non magnetic metal tubular section configured to receive the electromagnetic signals or a secondary field associated with the electromagnetic signals;
• and
• a receiver-control circuit outside the metal tubular in electrical communication with the antenna configured to detect the electromagnetic signals or the secondary field, and to control or monitor a packer device or operation associated with the metal tubular.