A tool includes a main body with one or more segments. Each of the one or more segments includes an outer wall, an inner volume defined within the outer wall and a pre-perforated spear mounted at the outer wall. The tool also includes one or more acoustic transducers which induce sonoluminescence in the inner volume, wherein pressure resulting from the induced sonoluminescence causes the pre-perforated spear to be ejected from the outer wall. A related method includes providing such a tool, inserting it to a wellbore and ejecting it from the outer wall as noted.

A tool includes a main body with one or more segments. Each of the one or more segments includes an outer wall, an inner volume defined within the outer wall and a pre-perforated spear mounted at the outer wall. The tool also includes one or more acoustic transducers which induce sonoluminescence in the inner volume, wherein pressure resulting from the induced sonoluminescence causes the pre-perforated spear to be ejected from the outer wall. A related method includes providing such a tool, inserting it to a wellbore and ejecting it from the outer wall as noted.

A downhole tool, which includes a tool housing having a longitudinal axis, is equipped with a sting for punching a hole in a casing wall and injecting a sealant though said hole. The tube has a fluid channel to establish fluid communication from within the tool housing to an exterior of the tool housing through the fluid channel. A press device acts on the sting to force the sting in a radially outward direction from the tool housing. A check valve is arranged in the fluid channel, which allows fluid communication in a direction from within the tool housing to an exterior of the tool housing and which blocks fluid flow in an opposite direction. In use, the sting can perforate a casing wall and the sealant can be injected into an annular space around the casing.

A downhole tool, which includes a tool housing having a longitudinal axis, is equipped with a sting for punching a hole in a casing wall and injecting a sealant though said hole. The tube has a fluid channel to establish fluid communication from within the tool housing to an exterior of the tool housing through the fluid channel. A press device acts on the sting to force the sting in a radially outward direction from the tool housing. A check valve is arranged in the fluid channel, which allows fluid communication in a direction from within the tool housing to an exterior of the tool housing and which blocks fluid flow in an opposite direction. In use, the sting can perforate a casing wall and the sealant can be injected into an annular space around the casing.

The proposed technology relates to methods and devices for selective treatment of wellbores that allows treating several intervals of a productive formation in a single trip. The proposed device for implementing the method includes a mechanical anchor, hydraulic fracturing port, packers and a perforator disposed in the device's bottom part. It is lowered into a well casing to the depth of productive formation. Working fluid is supplied to the perforator via a tubing string, the well casing is perforated, and caverns are washed out. The device is positioned so that the perforation interval is situated between the packers, fixed in the well casing by the anchor, and working fluid is then cut off. Hydraulic fracturing fluid is supplied, and the productive formation's interval is isolated from the well casing's annulus by activation of the packers. Hydraulic fracturing is executed, and the device is removed from the well casing.

The proposed technology relates to treatment of intervals of a productive formation, using a proposed device that is lowered into a wellbore to the depth of an interval, working fluid is admitted to the device's inner cavity below a lower through packer, supplied to a tubing string, through packers are activated, the wellbore annulus is isolated, the well casing is perforated, and the packers are deactivated. The device is lowered to a position between the packers, and is fixed by an anchor. Access of working fluid below the lower packer is cut off, and a hydraulic fracturing fluid is supplied, hermetically isolating the space between the packers. The device is then transferred to the next interval. The device includes the tubing sting, collar finder, upper through packer, hydraulic fracturing port, lower through packer, anchor and perforator. The technology prevents premature activation of the perforator, vibrations and damage to the packers.

The proposed technology relates to treatment of intervals of a productive formation, using a proposed device that is lowered into a wellbore to the depth of an interval, working fluid is admitted to the device's inner cavity below a lower through packer, supplied to a tubing string, through packers are activated, the wellbore annulus is isolated, the well casing is perforated, and the packers are deactivated. The device is lowered to a position between the packers, and is fixed by an anchor. Access of working fluid below the lower packer is cut off, and a hydraulic fracturing fluid is supplied, hermetically isolating the space between the packers. The device is then transferred to the next interval. The device includes the tubing sting, collar finder, upper through packer, hydraulic fracturing port, lower through packer, anchor and perforator. The technology prevents premature activation of the perforator, vibrations and damage to the packers.

A non-explosive punch system for making perforations in a casing includes a housing extending along a longitudinal axis and configured to be deployed in a well; one or more punch elements configured to extend through a wall of the housing to perforate a casing of the well; an actuating device located within the housing and configured to actuate the one or more punch elements; and an energy supply device located within the housing and configured to use a pressure of a well fluid present in the casing, to actuate the actuating device. No explosive material is present in the punch system.

A non-explosive punch system for making perforations in a casing includes a housing extending along a longitudinal axis and configured to be deployed in a well; one or more punch elements configured to extend through a wall of the housing to perforate a casing of the well; an actuating device located within the housing and configured to actuate the one or more punch elements; and an energy supply device located within the housing and configured to use a pressure of a well fluid present in the casing, to actuate the actuating device. No explosive material is present in the punch system.

A perforator tool that offers a simple solution to create multiple perforations at different lengths and locations inside a well casing. The perforator tool includes a tool housing that holds all of the components together along with providing a means of connecting the perforator tool to the drill pipe, and a means of transferring pressurized fluid from the drill pipe to use to engage the knife into the well casing, a knife that is used to create the perforation puncture(s) inside the well casing, a pin to hold and allow the knife to pivot inside the tool housing, and a spring connected to a set screw to be able to adjust the spring force to disengage the knife from the well casing.