A method of estimating an influx profile for at least one well fluid to a producing petroleum well with two or more influx zones or influx locations to a production flow, wherein the well comprises tracer sources with distinct tracer materials in known levels of the well, at least one of said tracer sources arranged downstream and exposed to the fluids in at least one of said influx zones, wherein each said tracer source has an even release rate to said well fluid, characterised in that one or more of the tracer sources is provided in one or more delay chambers for ventilating out fluid with leaked tracer material at a time constant which is significantly longer than the diffusion rate from the tracer source to the well fluid, wherein the method further comprises: providing samples, the samples collected from the production flow at a location downstream of the tracer sources during a time period in which the tracer transient is detectable at the downstream location, analysing said samples for concentration and type of tracer material from said possible tracer sources as a function of sampling time or cumulative produced volume; and based on said measured concentrations and their sampling time or cumulative produced volume, calculating said influx volumes.

A hybrid dump bailer is disclosed herein comprising a bailer tubes for containing a material, such as cement slurry, to be dumped. The hybrid dump bailer comprises a pressure pulse piston that is accelerated by a spring causing a pressure pulse to expel the material to be dumped. The hybrid dump bailer further comprises a collet, a retaining rod, a piston, valve, and a supply of pressurized fluid which is holds the pressure pulse piston in place while the spring is compressed. Once the valve is opened, releasing the pressurized fluid, the retaining rod separates from the collet allowing the pressure pulse piston to accelerate can produce the pressure pulse to dump the material.

A hybrid dump bailer is disclosed herein comprising a bailer tubes for containing a material, such as cement slurry, to be dumped. The hybrid dump bailer comprises a pressure pulse piston that is accelerated by a spring causing a pressure pulse to expel the material to be dumped. The hybrid dump bailer further comprises a collet, a retaining rod, a piston, valve, and a supply of pressurized fluid which is holds the pressure pulse piston in place while the spring is compressed. Once the valve is opened, releasing the pressurized fluid, the retaining rod separates from the collet allowing the pressure pulse piston to accelerate can produce the pressure pulse to dump the material.

Systems and methods for managing a loss circulation zone in a subterranean well include a tool housing located on a surface of a tubular member with a tool cavity that is an interior open space within the tool housing. An electromechanical system is located within the tool cavity and has a printed circuit board, a microprocessor, a sensor system, a power source, and a communication port assembly. A release system can move a deployment door of a deployment opening of the tool housing between a closed position and an open position. The deployment opening can provide a flow path between the tool cavity and an outside of the tool housing. The release system is actuable autonomously by the electromechanical system. A releasable product is located within the tool cavity and can travel through the deployment opening when the deployment door is in the open position.

Systems and methods for managing a loss circulation zone in a subterranean well include a tool housing located on a surface of a tubular member with a tool cavity that is an interior open space within the tool housing. An electromechanical system is located within the tool cavity and has a printed circuit board, a microprocessor, a sensor system, a power source, and a communication port assembly. A release system can move a deployment door of a deployment opening of the tool housing between a closed position and an open position. The deployment opening can provide a flow path between the tool cavity and an outside of the tool housing. The release system is actuable autonomously by the electromechanical system. A releasable product is located within the tool cavity and can travel through the deployment opening when the deployment door is in the open position.

This invention relates to a dump bailer (1) for insertion into a well (20) in the ground. The dump bailer (1) includes a receptacle (2) which communicates with surroundings through an inlet (4) and an outlet (6), and a pump (10) positioned in a flow path (7) between the inlet (4) and the outlet (6). The pump (10) is positioned at the outlet (6), and the pump (10) during transport of the dump bailer (1) in the well (20) constitutes a sealed barrier for the carried material (18) in the receptacle (2). A method for use of the dump bailer (1) is also described.

This invention relates to a dump bailer (1) for insertion into a well (20) in the ground. The dump bailer (1) includes a receptacle (2) which communicates with surroundings through an inlet (4) and an outlet (6), and a pump (10) positioned in a flow path (7) between the inlet (4) and the outlet (6). The pump (10) is positioned at the outlet (6), and the pump (10) during transport of the dump bailer (1) in the well (20) constitutes a sealed barrier for the carried material (18) in the receptacle (2). A method for use of the dump bailer (1) is also described.

A method includes introducing a first liquid composition into a well having a wellbore, introducing a second liquid composition into the well, and mixing the first and second liquid compositions within the well. The first liquid composition is kept separate from the second liquid composition until mixing the first and second liquid compositions within the well. Furthermore, the first liquid composition includes a first reactive component, the second liquid composition includes a second reactive component, and the first reactive component reacts with the second reactive component in response to mixing the first and second liquid compositions within the well. The method further includes causing the mixed compositions to engage the wellbore. In one example, the first reactive component may be an epoxy and the second reactive component may be a hardener that reacts with the epoxy to form a solid plug in the wellbore to seal off the well.

A dump bailer assembly includes a downhole power unit and a dump bailer body. A piston is disposed within the dump bailer body and is releasably coupled to a moveable shaft of the downhole power unit. An actuation assembly is disposed proximate a first end of the dump bailer body and a barrier is positioned proximate a second end of the dump bailer body. A wellbore agent is disposed within the dump bailer body between the barrier and the piston. In operation, the downhole power unit retracts the moveable shaft shifting the piston toward the first end and energizing the actuation assembly. Further operation of the downhole power unit releases the moveable shaft from the piston such that the energized actuation assembly shifts the piston toward the second end such that interaction between the piston and the wellbore agent opens the barrier and dispenses the wellbore agent.

A dump bailer assembly includes a downhole power unit and a dump bailer body. A piston is disposed within the dump bailer body and is releasably coupled to a moveable shaft of the downhole power unit. An actuation assembly is disposed proximate a first end of the dump bailer body and a barrier is positioned proximate a second end of the dump bailer body. A wellbore agent is disposed within the dump bailer body between the barrier and the piston. In operation, the downhole power unit retracts the moveable shaft shifting the piston toward the first end and energizing the actuation assembly. Further operation of the downhole power unit releases the moveable shaft from the piston such that the energized actuation assembly shifts the piston toward the second end such that interaction between the piston and the wellbore agent opens the barrier and dispenses the wellbore agent.