Well completion tool

A completion tool for insertion into a borehole for isolating a formation of interest traversed by the borehole, comprising:

• two substantially identical hollow metal inflation valve bodies each having a central opening with threads formed at opposite ends,
• two substantially identical hollow metal casing members, each having a central opening with threads formed at opposite ends, with said two casing members being screwed into ends of said two inflation valve bodies respectively such that said two inflation valve bodies form opposite ends of said completion tool,
• two substantially identical hollow metal packer mandrels each having opposite ends with a flexible cylindrical packer secured thereto around its outside such that intermediate portions of said packers may be expanded outward from said mandrels,
• said two packer mandrels being coupled to said two inflation valve bodies respectively around said casing members forming an annulus between each casing member and the packer mandrel coupled to the inflation valve body to which the casing member is screwed,
• each of said inflation valve bodies having slots formed in its outer surface in fluid communication with said annulus formed between said casing member and said packer mandrel to which said inflation valve body is coupled,
• a hollow metal adapter coupling member having a central opening with threads formed at opposite ends,
• hollow sleeve valve means formed of metal comprising a first type of threads formed at one end to which one of the casing members is screwed and a second type of threads formed at the other end to which one end of said adapter coupling member is screwed with the other casing member screwed to the other end of said adapter coupling member,
• said sleeve valve means having a central opening,
• a hollow piston slidably located in said central opening of said sleeve valve means for movement between closed and open positions,
• said piston having a central opening,
• outer and inner ports formed through the walls of said sleeve valve means and said piston respectively at positions such that said outer and inner ports are in fluid communication with each other when said piston is in said open position and closed to each other when said piston is in said closed position,
• said central opening of said two inflation valve bodies, said two casing members and said hollow sleeve valve means including said hollow piston and said adapter coupling forming a central passageway extending through said completion tool,
• said sleeve valve means including structure radially outward of its central opening forming an outer passageway sealed from said central passageway,
• said two annuluses, said outer passageway and said slots of said two inflation valve bodies forming an outer by-pass flow path through said completion tool.

A completion tool for insertion into a borehole for isolating a formation of interest traversed by the borehole, comprising:

• first and second hollow packer mandrels having first and second elongated cylindrical slots respectively formed in the exterior thereof,
• first and second elongated cylindrical packers located in said first and second elongated cylindrical slots respectively,
• each packer having opposite ends bonded to the ends of the cylindrical slot in which it is located and an unbounded intermediate portion which can be expanded outward by the injection of fluid under pressure between said intermediate portion and said cylindrical slot,
• hollow intermediate structural means coupled between said first and second packer mandrels such that said first and second packer mandrels have upper and lower ends and said first and second cylindrical packers having upper and lower ends,
• said hollow intermediate structural means and said first and second packer mandrels providing a central fluid flow path between the said upper and lower ends of said first and second hollow packer mandrels,
• a hollow piston slidably located in said hollow intermediate structural for movement between closed open positions,
• outer ports formed through the wall of said hollow intermediate structural means,
• an annular slot formed in the inside of said hollow intermediate structural means in fluid communication with said outer ports,
• inner ports formed through the wall of said hollow piston at positions such that said annular slot and said inner ports are in fluid communication with each other when said piston is in said open position and closed to each other when said piston is in said closed position,
• an outer by-pass fluid flow path extending through said tool beyond said upper and lower ends of said first and second packer mandrels and radially outward and separate from said central fluid flow path, and
• means for injecting fluid under pressure between said intermediate portions of said packers and said cylindrical slots for expanding said first and second packers outward.

A completion tool for insertion into a borehole for isolating a formation of interest traversed by the borehole, comprising:

• first and second hollow packer mandrels having first and second elongated slots respectively formed in the exterior thereof,
• first and second elongated cylindrical packers located in said first and second elongated cylindrical slots respectively,
• each packer having opposite ends secured to the ends of the cylindrical slot in which it is located and an unsecured intermediate portion which can be expanded outward by the injection of fluid under pressure between said intermediate portion and said cylindrical slot,
• first and second hollow inflation valve bodies each having a central opening extending therethrough,
• first and second hollow casing members each having a central opening extending therethrough,
• said first and second casing members being coupled to said first and second inflation valve bodies respectively such that said central openings of said first and second casing members are in fluid communication with said central openings of said first and second inflation valve bodies respectively,
• said first and second packer mandrels being coupled to said first and second inflation valve bodies respectively around said first and second casing members respectively forming first and second annuluses between said first and second casing members and said first and second packer mandrels,
• hollow intermediate structural means coupled between said first and second packer mandrels and between said first and second casing members respectively,
• said intermediate structural means having a central opening formed therethrough in fluid communication with said central openings of said first and second casing members and an outer by-pass fluid flow path radially outward and separate from said central flow path with said outer by-pass fluid flow path being in fluid communication with said first and second annuluses,
• each of said inflation valve bodies having slots formed in its outer surface in fluid communication with said annulus formed between said casing member and said packer mandrel to which said inflation valve body is coupled,
• a hollow piston slidably located in said central opening of said intermediate structural means for movement between closed and open positions,
• said piston having a central opening extending therethrough,
• at least one outer port formed through the wall of said intermediate structural means at a position such that said outer port is in fluid communication with said central opening of said piston when said piston is in said open position and closed to said central opening of said piston when said piston is in said closed position,
• each of said inflation valve bodies comprising,
• an annular wall having a central axis,
• an elongated cavity formed in said annular wall generally parallel to said central axis,
• inlet means for providing fluid communication between the interior of said inflation valve body and said cavity,
• an inflation flow path formed in said annular wall for providing fluid communication between said cavity and said intermediate portion of said packer and said cylindrical slot of said packer mandrel to which said inflation valve body is coupled,
• an inflation piston slidably located in said cavity for allowing fluid flow, by way of said inlet means, from the interior of said inflation valve body to said inflation flow path for expanding said packer outward, until the fluid pressure between said intermediate portion of said packer and said cylindrical slot of said packer mandrel to which said inflation valve body is coupled, reaches a given level and then for blocking fluid flow from the interior of said inflation valve body to said inflation flow path.