A method of well rehabilitation using CO.sub.2 comprises a more effective distribution of effective CO.sub.2 energy throughout an entire well structure including all parts of a producing interval of a well and surrounding formation. The CO.sub.2 phase changes are controlled during CO.sub.2 injection to cause surging agitation within a well bore and surrounding formation and allow CO.sub.2 energy to reach all areas of the well, and the CO.sub.2 energy utilized includes at least one of chemical energy, thermal energy and mechanical energy.

A resource collection device of a resource collection system has a resource collection pipe, a protection pipe, and a coiled tubing device. The protection pipe is disposed around the resource collection pipe and protects the resource collection pipe. The coiled tubing device is fed from a winding reel disposed on the sea surface or inside the protection pipe by way of a feeding device and penetrates a side wall of the protection pipe to extend from the interior to the exterior. The resource collection system cracks the sea floor layer by way of: supplying undiluted solutions of foaming material, fuel gas, and air containing oxygen into the sea floor layer through the coiled tubing device; mixing the undiluted solutions of foaming material together to expand in an atmosphere that includes fuel gas and air; and causing the fuel gas accumulated in the hollows of the foaming material to explosively combust.

A resource collection device of a resource collection system has a resource collection pipe, a protection pipe, and a coiled tubing device. The protection pipe is disposed around the resource collection pipe and protects the resource collection pipe. The coiled tubing device is fed from a winding reel disposed on the sea surface or inside the protection pipe by way of a feeding device and penetrates a side wall of the protection pipe to extend from the interior to the exterior. The resource collection system cracks the sea floor layer by way of: supplying undiluted solutions of foaming material, fuel gas, and air containing oxygen into the sea floor layer through the coiled tubing device; mixing the undiluted solutions of foaming material together to expand in an atmosphere that includes fuel gas and air; and causing the fuel gas accumulated in the hollows of the foaming material to explosively combust.

A perf and wash system for plugging a casing and wellbore, the perf and wash system including a cleaning tool having at least one nozzle making a first angle with a longitudinal axis of the system; a perforating gun assembly having at least one shaped charge making a second angle with the longitudinal axis; and a plug connected with a first end to the cleaning tool and with a second end, opposite to the first end, to the perforating gun assembly. The first angle is substantially equal to the second angle and the first and second angles are different than 90 degrees.

A perf and wash system for plugging a casing and wellbore, the perf and wash system including a cleaning tool having at least one nozzle making a first angle with a longitudinal axis of the system; a perforating gun assembly having at least one shaped charge making a second angle with the longitudinal axis; and a plug connected with a first end to the cleaning tool and with a second end, opposite to the first end, to the perforating gun assembly. The first angle is substantially equal to the second angle and the first and second angles are different than 90 degrees.

A screen assembly includes a pipe forming a first passageway and a first plurality of passageways extending between internal and external surfaces of the pipe to define a first portion of the pipe; a tubular disposed about the first portion, wherein the tubular forms a second passageway and a second plurality of passageways extending between external and internal surfaces of the tubular; and a housing concentrically disposed about the tubular to form a chamber that is between the tubular and the housing and that is in fluid communication with a screen jacket exit. When in a first configuration, dissolvable plugs are accommodated within the second plurality of passageways to fluidically isolate the external surface of the tubular from the first passageway. When in the second configuration, the screen jacket exit is in fluid communication with the first passageway via the chamber and the first and second plurality of passageways.

A screen assembly includes a pipe forming a first passageway and a first plurality of passageways extending between internal and external surfaces of the pipe to define a first portion of the pipe; a tubular disposed about the first portion, wherein the tubular forms a second passageway and a second plurality of passageways extending between external and internal surfaces of the tubular; and a housing concentrically disposed about the tubular to form a chamber that is between the tubular and the housing and that is in fluid communication with a screen jacket exit. When in a first configuration, dissolvable plugs are accommodated within the second plurality of passageways to fluidically isolate the external surface of the tubular from the first passageway. When in the second configuration, the screen jacket exit is in fluid communication with the first passageway via the chamber and the first and second plurality of passageways.

Disclosed herein are compositions, processes, and systems for deploying and creating a temporary fluid barrier at an interface between a high fluid conductivity zone and a lower fluid conductivity zone. The disclosed compositions include mixtures of solvents and biodegradable non-spherical particles, wherein the particles include a coating that may slow or inhibit degradation, for example by hydrolysis, of the particle. The disclosed particles are designed to possess sufficient flexibility to traverse the high conductivity zone.

Disclosed herein are compositions, processes, and systems for deploying and creating a temporary fluid barrier at an interface between a high fluid conductivity zone and a lower fluid conductivity zone. The disclosed compositions include mixtures of solvents and biodegradable non-spherical particles, wherein the particles include a coating that may slow or inhibit degradation, for example by hydrolysis, of the particle. The disclosed particles are designed to possess sufficient flexibility to traverse the high conductivity zone.

A perf and wash system for plugging a casing and wellbore, the perf and wash system including a cleaning tool having at least one nozzle making a first angle with a longitudinal axis of the system; a perforating gun assembly having at least one shaped charge making a second angle with the longitudinal axis; and a plug connected with a first end to the cleaning tool and with a second end, opposite to the first end, to the perforating gun assembly. The first angle is substantially equal to the second angle and the first and second angles are different than 90 degrees.