A method and system for steering the direction of propagation of a flexible liner everting under a driving fluid pressure. There is provided a method for controlling and guiding directionally the eversion of the flexible liner into a borehole that penetrates a subsurface (e.g., subterranean) void with a diameter substantially exceeding the nominal diameter of the borehole. Further, liner propagation by eversion can be controlled outside of a borehole and when unconstrained by a borehole, such as on or beneath the surface of a body of water.

System, method, and apparatus for harnessing geothermal power from superhot geothermal fluid (SHGF) and magma reservoirs. An exemplary embodiment is directed to a cased wellbore for use in generating superheated steam. The cased wellbore includes a first end at a surface, a second end at an underground reservoir of magma, and a fluid pathway extending from an inlet at the first end to the second end and then from the second end to an outlet at the first end. The fluid pathway is configured to receive saturated steam at the inlet and expel superheated steam from the outlet, and the saturated steam is transformed into superheated steam in the fluid pathway at the second end of the cased wellbore.

A downhole tool for transmitting rotation to a casing string includes a tool body having a bore extending from a first end to a second end. The downhole tool also includes a cam positioned within the tool body, the cam being axially translatable along an axis of the bore. The downhole tool further includes a recess, formed in an outer diameter of the cam. The downhole tool includes a locking mechanism, positioned at least partially within the tool body. The locking mechanism includes a tool key. The locking mechanism also includes a biasing member, the biasing member driving the tool key toward the retracted position.

System, method, and apparatus for harnessing geothermal power from superhot geothermal fluid (SHGF) and magma reservoirs. An exemplary embodiment is directed to a cased wellbore includes a well casing suspended within a borehole that extends between a surface and an underground reservoir of magma and a boiler casing housed within the well casing and extending between the surface and the underground reservoir of magma. The boiler casing has a first end submerged within the underground reservoir of magma and a terminal end opposite to the first end. The cased wellbore also includes a fluid conduit housed within the boiler casing and configured to deliver a liquid-phase fluid to the terminal end of the boiler casing. A temperature and a pressure at the terminal end of the boiler casing converts the liquid-phase fluid into a gas-phase fluid that travels through the boiler casing towards the surface. The cased wellbore also includes a well head connected to the first end of the boiler casing.

System, method, and apparatus for harnessing geothermal power from superhot geothermal fluid (SHGF) and magma reservoirs. An exemplary embodiment is directed to a cased wellbore includes a well casing suspended within a borehole that extends between a surface and an underground reservoir of magma and a boiler casing housed within the well casing and extending between the surface and the underground reservoir of magma. The boiler casing has a first end submerged within the underground reservoir of magma and a terminal end opposite to the first end. The cased wellbore also includes a fluid conduit housed within the boiler casing and configured to deliver a liquid-phase fluid to the terminal end of the boiler casing. A temperature and a pressure at the terminal end of the boiler casing converts the liquid-phase fluid into a gas-phase fluid that travels through the boiler casing towards the surface. The cased wellbore also includes a well head connected to the first end of the boiler casing.

A drilling casing includes a casing wall and several sand control apparatuses disposed on the casing wall in a spacing. Each sand control apparatus includes a sand control net, a sealing steel sheet and a sealing rubber plug. A plurality of mutually-paralleled sand control meshes are disposed on the sand control net. The sand control mesh exactly faces the sealing steel sheet. The sand control net is connected with the sealing steel sheet through a steel pin. Further, a method of performing fast drilling and completion of a large-borehole multilateral well by the drilling casing includes forming a main borehole by drilling to a destination well depth at one time with a large-size drill bit, drilling a lateral borehole in a natural gas hydrate reservoir by using the drilling casing, and taking out the drill bit for completion. The method is applicable to various natural gas hydrate extraction manners.

A downhole tool for transmitting rotation to a casing string includes a tool body having a bore extending from a first end to a second end. The downhole tool also includes a cam positioned within the tool body, the cam being axially translatable along an axis of the bore. The downhole tool further includes a recess, formed in an outer diameter of the cam. The downhole tool includes a locking mechanism, positioned at least partially within the tool body. The locking mechanism includes a tool key. The locking mechanism also includes a biasing member, the biasing member driving the tool key toward the retracted position.

System, method, and apparatus for harnessing geothermal power from superhot geothermal fluid (SHGF) and magma reservoirs. An exemplary apparatus can include a well screen coupled to an end of a casing string. The well screen, which is at least partially submerged within an underground reservoir, defines a volume in the underground reservoir that can be filled with superhot geothermal fluid. A slidable casing is aligned coaxially with the well screen and configured to be repositioned relative to the well screen. A draw pipe extending through the slidable casing is configured to convey SHGF from the underground reservoir towards the surface in response to the slidable casing being repositioned to obstruct more of a set of apertures in the well screen and an increase in pressure within a cavity of the slidable casing.

An assembly for hanging a tubular string includes a packoff (56) having a fastener and a seal for engaging an inner surface of the tubular string and a setting tool. The setting tool includes: a debris cap (84) for engaging an upper end of the tubular string, thereby forming a buffer chamber between the debris cap (84) and the packoff (56); a mandrel (66) having a port formed through a wall thereof; a piston (71): disposed along the mandrel, having an upper face in fluid communication with the port, and operable to stroke the debris cap relative to the mandrel, thereby setting a hanger of the tubular string; an actuator sleeve (71) extending along the mandrel and connected to the piston; a packer actuator (62) including a housing connected to the debris cap above the buffer chamber and a fastener for engaging a profile of the actuator sleeve; and a latch releasably connecting the housing to the mandrel.

Disclosed is a new drilling casing, including a casing wall and several sand control apparatuses disposed on the casing wall in a spacing, wherein each sand control apparatus includes a sand control net, a sealing steel sheet and a sealing rubber plug, a plurality of mutually-paralleled sand control meshes are disposed on the sand control net, the sand control mesh exactly faces the sealing steel sheet, and the sand control net is connected with the sealing steel sheet through a steel pin. Further a method of performing fast drilling and completion of a large-borehole multilateral well by using the new drilling casing is disclosed. a main borehole is formed by drilling to a destination well depth at one time with a large size drill bit, a lateral borehole is then drilled in a natural gas hydrate reservoir by using the new drilling casing, and then, the drill bit is taken out for completion. The method is applicable to various natural gas hydrate extraction manners. The method greatly increases production and recovery rate of a hydrate well by integrating well drilling and completion in a shorter drilling and completion period, thereby saving lots of labor and materials, and ensuring effective sand control.