Well packer

Claim 2

An open-hole well bore packer adapted to be connected into a tubing string comprising: a lower tubular cylindrical section adapted to be connected into a tubing string; a cylindrical central floating tubular section adapted for vertical telescopic movement with respect to said lower section; a cylindrical tubular upper section adapted to be connected into a tubing string and to telescope with respect to said lower section and said floating section, said upper section being connected in telescopic engagement with said lower section and said floating section; first resilient packer means fixedly attached exteriorly to and encircling said upper section, in abutment with said floating section; second resilient packer means snugly located exteriorly to said floating means in abutment with and located between said floating section and said lower section; piston means attached to the lower end of said upper section and adapted to sealingly engage a portion of said lower section so that when said piston means are engaged with said lower section and fluid pressure is applied to the interior of said tubing string, the fluid pressure urges the piston means and upper section away from the lower section; and at least one port provided in said lower section for communicating the internal portion of said lower section with the exterior thereof so that fluid pressure applied to the exterior of said lower section is communicated to said piston means and urges said piston means and the upper section towards the lower section.

Claim 3

The well packer of claim 1 further comprising means for allowing vertical reciprocating telescopic action while preventing angular rotation between said upper section, said floating section, and said lower section, and said means further allowing fluid communication therethrough.

Claim 4

The well packer of claim 1 wherein said first resilient packer means comprises an elastomeric sleeve; said second resilient packer means comprises a second elastomeric sleeve, and said second resilient packer means is made of a substantially firmer elastomeric material than that of said first resilient packer means.

Claim 5

The well packer of claim 1 wherein said upper section comprises: a generally cylindrical tubular head means adapted to be threadedly engaged with a section of tubing; and having an open bore passsage therethrough, external threads thereon, internal threads therein, and first interlocking lug means located at one extremity thereon; a generally cylindrical tubular top packer shoe means having an externally threaded end thereon containing second interlocking lug means, and a flared bell-end at one end thereof opposite said externally threaded end, said bell-end adapted to abut said first resilient packer means in retaining relationship therewith; generally cylindrical turnbuckle means having external threads therein arranged to threadedly engage said tubular head means and said top packer shoe means and further adapted to draw said head means into abutment with said top shoe means thereby interlocking said first and second lug means; generally Cylindrical extended tubular mandrel means having externally threaded section at one end and a second externally threaded section at the opposite end, and further having a roughened friction-providing external surface located partially thereon; said mandrel means being threadedly engaged by means of said first externally threaded section to said internal threads of said head means and passing through said top packer shoe means, said first and second resilient packer means, said floating section, and partially through said lower section; and piston means having seal means thereon, said piston means threadedly attached to said mandrel means at said second externally threaded section and encircling a portion of said mandrel means, said piston means adapted to sealingly engage the inner bore of said lower tubular cylindrical section.

Claim 6

The well packer of claim 1 wherein said floating section comprises a substantially cylindrical sleeve portion to which is attached a flared bell-end portion in abutment with said first resilient packer means.

Claim 7

An open-hole well bore packer adapted to be connected into a tubing string comprising: a lower tubular cylindrical section adapted to be connected into a tubing string, said lower section including: cylindrical shoe support means having a flare bell-end thereon adapted for abutment with said second resilient packer means and further adapted for slidable movement about said floating section, said shoe support means further having an externally threaded central sleeve, a lower collar, and one or more ports through said central sleeve; splined housing means having an upper outer sleeve threadedly attached to said threaded central sleeve of said shoe support means, with one or more ports therethrough, a central collar means adapted to reciprocate vertically about said upper section, and a lower inner sleeve having external threads thereon, with said ports through said outer sleeve being aligned with said ports through said central sleeve; and bottom sealing adapter means having two or more different sized central axial inner bores therethrough, said sealing adapter means being threadedly engaged with said splined housing means at said lower inner sleeve, said sealing adapter means having one or more ports through the wall thereof, and said sealing adapter means adapted to sealingly engage said upper section and further adapted to be threadedly engaged into a section of well tubing; a cylindrical central floating tubular section adapted for vertical telescopic movement with respect to said lower section; a cylindrical tubular upper section adapted to telescope with respect to said lower section and said floating section and in telescopic engagement with said lower section and said floating section; first resilient packer means fixedly attached exteriorly to and encircling said upper section, in abutment with said floating section; and second resilient packer means snugly located exteriorly to said floating means in abutment with and located between said floating section and said lower section.

Claim 8

An open-hole well bore packer adapted to be connected into a tubing string comprising: a lower tubular cylindrical section adapted to be connected into a tubing string, said lower section including: cylindrical shoe support means having a flare bell-end thereon adapted for abutment with said second resilient packer means and further adapted for slidable movement about said floating section, said shoe support means further having an externally threaded central sleeve, a lower collar, and one or more ports through said central sleeve; splined housing means having an upper outer sleeve threadedly attached to said threaded central sleeve of said shoe support means, with one or more ports therethrough, a central collar means adapted to reciprocate vertically about said upper section, and a lower inner sleeve having external threads thereon, with said ports through said outer sleeve being aligned with said ports through said central sleeve; and bottom sealing adapter means having two or more different sized central axial inner bores therethrough, said sealing adapter means being threadedly engaged with said splined housing means at said lower inner sleeve, said sealing adapter means having one or more ports through the wall thereof, and said sealing adapter means adapted to sealingly engage said upper section and further adapted to be threadedly engaged into a section of well tubing; a cylindrical central floating tubular section adapted for vertical telescopic movement with respect to said lower section; a cylindrical tubular upper section adapted to telescope with respect to said lower section and said floating section and in telescopic engagement with said lower section and said floating section; first resilient packer means fixedly attached exteriorly to and encircling said upper section, in abutment with said floating section; and second resilient packer means snugly located exteriorly to said floating means in abutment with and located between said floating section and said lower section.

Claim 9

The well packer of claim 2 wherein said means for allowing vertical reciprocation while preventing angular rotation comprises internal splines within said lower tubular section and said floating section, and external splines on the telescoped end of said upper section, said internal splines adapted to engage and interlock with said external splines.

Claim 10

An open hole well packer comprising: a generally cylindrical upper adapter having an open bore therethrough, and a lower downwardly flared bell-end thereon, said upper adapter arranged to be attached into a standard string of drill pipe; an extended tubular mandrel fixedly attached to said upper adapter; an upper resilient packer sleeve snugly encircling said mandrel and abutting the lower edge of said downwardly flared bell-end; a floating packer support of substantially cylindrical configuration slidably encircling said mandRel and having an upwardly flared bell-end abutting the lower end of said upper resilient packer sleeve; a lower resilient packer sleeve fixedly attached to and encircling said floating packer support and abutting said upwardly flared bell-end; substantially cylindrical lower adapter means having two or more different diameter axial bores therethrough, two or more sets of ports through the wall thereof, an upwardly flared bell-end abutting the lower end of said lower resilient packer sleeve and slidably engaging said floating packer support, and adapted to be inserted in a standard tubing drill string; and piston means fixedly attached to the lower end of said mandrel and adapted to sealingly engage one of said axial bores in said lower adapter in a lower position of said mandrel, and further adapted in another position to limit telescopic extension of said mandrel out of said lower adapter.

Claim 11

An open hole well packer comprising: a generally cylindrical upper adapter having an open bore therethrough, and a lower downwardly flared bell-end thereon, said upper adapter arranged to be attached into a standard string of drill pipe; an extended tubular mandrel fixedly attached to said upper adapter; an upper resilient packer sleeve snugly encircling said mandrel and abutting the lower edge of said downwardly flared bell-end; a floating packer support of substantially cylindrical configuration slidably encircling said mandRel and having an upwardly flared bell-end abutting the lower end of said upper resilient packer sleeve; a lower resilient packer sleeve fixedly attached to and encircling said floating packer support and abutting said upwardly flared bell-end; substantially cylindrical lower adapter means having two or more different diameter axial bores therethrough, two or more sets of ports through the wall thereof, an upwardly flared bell-end abutting the lower end of said lower resilient packer sleeve and slidably engaging said floating packer support, and adapted to be inserted in a standard tubing drill string; and piston means fixedly attached to the lower end of said mandrel and adapted to sealingly engage one of said axial bores in said lower adapter in a lower position of said mandrel, and further adapted in another position to limit telescopic extension of said mandrel out of said lower adapter.

Claim 12

The well packer of claim 8 further comprising means for preventing angular rotation between said tubular mandrel, said floating packer support, and said lower adapter; means for preventing slippage of said upper resilient packer sleeve on said mandrel; and means for providing fluid communication between said sets of ports and the lower end of said upper packer sleeve.

Claim 13

The well packer of claim 9 wherein said lower resilient packer is made of an elastomeric material substantially harder than that of said upper resilient packer sleeve; and said means for providing fluid communication and said means for preventing angular rotation both comprise internal splines in said floating packer support and said lower adapter, and external splines on said mandrel in interlocking engagement with said internal splines.