Geodynamics, Inc.

Brad Perry

Roger Archibald

Phillip Phelps

Rick Wallace

Jason Ansley

A downhole system including a gun string configured to be deployed into a wellbore, the gun string including plural gun assemblies. A detonator block attached to a given gun assembly of the plural gun assemblies. The detonator block includes a switch assembly. The switch assembly includes a communication unit (CU) configured to receive, from an external controller, a fire command to activate a detonator associated with the detonator block, a measuring unit configured to measure a parameter (V) at the switch assembly, and a computing core (CC) configured to locally make a decision whether to activate or not the detonator, after the fire command is received from the external controller, based on whether a voltage measured by the measuring unit at the switch assembly is larger or not than a threshold voltage.

Addressable switch assembly for wellbore systems and method

A wireline release tool for downhole intervention, the tool including a housing having an electrical input and an electrical output; a pass-through switch located inside the housing and electrically connected between the electrical input and the electrical output; and a current limiter device located inside the housing and electrically connected between the electrical input and the electrical output. The pass-through switch is connected in parallel to the current limiter device, between the electrical input and the electrical output.

Current feed-through wireline release tool and method

A switch assembly, which is part of a chain of switch assemblies. The switch assembly includes a micro-controller PB that has no address, a thru-line switch, and a detonator switch. The micro-controller PB is configured to directly communicate with an upstream or downstream switch assembly through a pulsing scheme, and the micro-controller PB receives no command from a surface controller.

Micro-controller-based switch assembly for wellbore systems and method

A switch assembly, which is part of a chain of switch assemblies, includes a communication unit (CU) configured to receive, from an external controller, a fire command to activate a detonator, a voltage measuring unit configured to locally measure a voltage (V) at the switch assembly after receiving the fire command to activate the detonator, a computing core (CC) configured to locally make a decision whether or not to activate the detonator, after receiving the fire command to activate the detonator and after measuring the voltage (V), based on whether or not the measured voltage (V) at the switch assembly is larger than a threshold value.

A convertible and addressable switch assembly incudes an interface (I/O) configured to connect to a controller along a telemetry system; and a processor connected to the interface (I/O). The processor is configured to receive a command from the controller, along the telemetry system, to change a first value of a mode status variable to a desired second value, wherein the first value is associated with a first operating mode of the switch assembly and the second value is associated with a second operating mode, which is different from the first operating mode; change the first value to the second value within the switch assembly; and store in a non-volatile memory, at the switch assembly, the second value of the mode status variable.

Convertible and addressable switch assembly for wellbore operations

A switch assembly, which is part of a chain of switch assemblies. The switch assembly includes a micro-controller Pthat has no address, a thru-line switch, and a detonator switch. The micro-controller Pis configured to directly communicate with an upstream or downstream switch assembly through a pulsing scheme, and the micro-controller Preceives no command from a surface controller.

A wireline release tool for downhole intervention, the tool including a housing having an electrical input and an electrical output; a pass-through switch located inside the housing and electrically connected between the electrical input and the electrical output; and a circuit limiter device located inside the housing and electrically connected between the electrical input and the electrical output. The pass-through switch is connected in parallel to the circuit limiter device, between the electrical input and the electrical output.

A convertible and addressable switch assembly includes an interface (I/O) configured to connect to a controller along a telemetry system; and a processor connected to the interface (I/O). The processor is configured to receive a command from the controller, along the telemetry system, to change a first value of a mode status variable to a desired second value, wherein the first value is associated with a first operating mode of the switch assembly and the second value is associated with a second operating mode, which is different from the first operating mode; change the first value to the second value within the switch assembly; and store in a non-volatile memory, at the switch assembly, the second value of the mode status variable.

A method for controlling a target switch assembly in a chain of switch assemblies includes distributing the chain of switch assemblies in a wellbore; placing a controller at a head of the wellbore; making a first decision, at the controller, to actuate a corresponding detonator of the target switch assembly; transmitting, from the controller to the target switch assembly, a fire command to activate the corresponding detonator; and making a second decision, locally, at the target switch assembly, to activate the detonator, after the fire command from the controller is received.

A method for firing a detonator in a chain of switch assemblies includes a step of lowering the chain of switch assemblies into a wellbore; a step of powering-up a switch assembly of the chain of switch assemblies; a step of independently entering through a set of states during which the switch assembly interacts with a downstream switch assembly and determines a status of one or more elements associated with the switch assembly; and a step of firing a detonator electrically connected to the switch assembly or entering a sleeping state.

A downhole system includes a controller located at the surface, a gun string located in a wellbore, the gun string including plural gun assemblies, a thru-line connecting the controller to the gun string, and a detonator block attached to a given gun assembly. The detonator block includes an addressable switch assembly. The gun assembly includes an end plate mechanism that electrically connects to the detonator block. The detonator block has at least one spring-loaded contact connected to the thru-line and the end plate mechanism includes a round electrical contact made as a printed circuit board, and the spring-loaded contact touches the printed circuit board.

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Santo, TX, United States of America

Brad Perry