Apparatus for selective formation treatment

Claim 2

In selective well treating apparatus adapted to be run into a well casing on a pipe string for conducting treating fluid selectively to isolated, vertically spaced perforated casing sections: packer means having an elongated tubular mandrel provided with a bore therethrough, said packer having anchor means and sealing means expansible into anchoring engagement and retractable from anchoring engagement with the well casing, an elongated seal tube reciprocably extending through said bore of said mandrel, said seal tube and said mandrel having cooperative sealing means in mid bore, fluid injection tool means on said seal tube and including longitudinally spaced packing means sealingly engageable with said casing at locations above and below one of said perforated casing sections, and treating fluid passage means extending through said seal tube and said tool means to conduct treating fluid to the space between said longitudinally spaced packing means.

Claim 3

In selective well treating apparatus as defined in claim 1, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means.

Claim 4

In selective well treating apparatus as defined in claim 1, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasably responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means and said sealing means.

Claim 5

In selective well treating apparatus as defined in claim 1, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means and said sealing means, said packer means also having means for holding said anchor means and said sealing means expanded into engagement with said casing and releasable responsive to manipulation of said mandrel, and including means for connecting said seal tube to said mandrel to manipulate the same for causing retraction of said anchor means and said sealing means.

Claim 6

In selective well treating apparatus as defined in claim 1, said cooperative sealing means of said seal tube and said mandrel including a sealing surface in said mandrel bore and sealing members spaced longitudinally along said seal tube to be positioned in said sealing surface when said packing means are at said locations.

Claim 7

In selective well treating apparatus as defined in claim 1, said cooperative sealing means of said seal tube and said mandrel including a sealing surface in said mandrel bore and sealing members spaced longitudinally along said seal tube to be positioned in said sealing surface when said packing means are at said locations, said seal tube comprising a number of interconnected seal tube sections joined in end-to-end relation.

Claim 8

In selective well treating apparatus as defined in claim 1, said cooperative sealing means of said seal tube and said mandrel including a sealing surface in said mandrel bore and seAling members spaced longitudinally along said seal tube to be positioned in said sealing surface when said packing means are at said locations, said seal tube comprising a number of interconnected seal tube sections joined in end-to-end relations, and said sealing member of said seal tube including resilient seal elements mounted at the junctions of said seal tube sections.

Claim 9

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string.

Claim 10

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string, said valve means comprising a valve sleeve and means on said valve sleeve engageable with the casing to hold said sleeve stationary as said pipe string is moved vertically.

Claim 11

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string, and also including means defining a by-pass passage for communicating with said casing through said treating tool means above and below said packing means.

Claim 12

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string, said valve means comprising a valve sleeve and means on said valve sleeve engageable with the casing to hold said sleeve stationary as said pipe string is moved vertically, and also including means defining a by-pass passage for communicating with said casing through said treating tool means above and below said packing means.

Claim 13

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means.

Claim 14

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means, said packer means also having means for holding said anchor means And said sealing means expanded into engagement with said casing and releasable responsive to manipulation of said mandrel, and including means for connecting said seal tube to said mandrel to manipulate the same for causing retraction of said anchor means and said sealing means.

Claim 15

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string, and also including means defining a by-pass passage for communicating with said casing through said treating tool means above and below said packing means, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means.

Claim 16

In selective well treating apparatus as defined in claim 1, means defining a circulating passage communicating through said tool means with the space between said packing means and with the casing above said packing means, and including valve means for closing and opening said circulating passage responsive to manipulation of said pipe string, and also including means defining a by-pass passage for communicating with said casing through said treating tool means above and below said packing means, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means and said sealing means, said packer means also having means for holding said anchor means and said sealing means expanded into engagement with said casing and releasable responsive to manipulation of said mandrel, and including means for connecting said seal tube to said mandrel to manipulate the same for causing retraction of said anchor means and said sealing means.

Claim 17

In selective well treating apparatus as defined in claim 1, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means, said means releasably connecting said pipe string to said mandrel including a control head having a part connected to said seal tube and a part connected to said mandrel, and releasable means interconnecting said parts.

Claim 18

In selective well treating apparatus as defined in claim 1, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means, said means releasably connecting said pipe string to said mandrel including a control head having a part connected to said seal tube and a part connected to said mandrel, and releasable means interconnecting said parts including frangible means.

Claim 19

In selective well treating apparatus as defined in claim 1, said packer means having means initIally holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means, said means releasably connecting said pipe string to said mandrel including a control head having a part connected to said seal tube and a part connected to said mandrel, and releasable means interconnecting said parts including a J-slot and pin.

Claim 20

In selective well treating apparatus as defined in claim 1, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means, said means releasably connecting said pipe string to said mandrel including a control head having a part connected to said seal tube and a part connected to said mandrel, and releasable means interconnecting said parts including frangible means breakable following expansion of said anchor means and a J-slot and pin disengageable following expansion of said sealing means.

Claim 21

In selective well treating apparatus as defined in claim 1, said packer means having means initially holding said anchor means and sealing means retracted, said holding means being releasable responsive to manipulation of said mandrel, and including means releasably connecting said pipe string to said mandrel for manipulating the latter and releasable from said mandrel to allow longitudinal movement of said pipe string and seal tube following expansion of said anchor means and said sealing means, said packer means also having means for holding said anchor means and said sealing means expanded into engagement with said casing and releasable responsive to manipulation of said mandrel, and including means for connecting said seal tube to said mandrel to manipulate the same for causing retraction of said anchor means and said sealing means, said means releasably connecting said pipe string to said mandrel including a control head having a part connected to said seal tube and a part connected to said mandrel, and releasable means interconnecting said parts, said means for connecting said seal tube to said mandrel including control pin and J-slot means on said seal tube and said mandrel.