Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
290 words
For use in a well bore with a pump in the lower portion of the bore, a pipe extending upwardly from the pump through the bore and a cable extending upwardly from the pump through the bore, a well packer positioned in the well bore above the pump, said packer comprising: a. a pipe section having a lower end portion that is threaded to provide means to connect it to said pump, a bend above said threaded portion defining a recess at one side of the pipe section, a heavy flange integral with the pipe section at the upper end of the bend, and a threaded nipple above said flange, said flange being formed with two diametrically opposed openings, one of which is above said recess; b. a leather packing cup having a flat wall engaging said flange and a cylindrical wall snugly engageable with the bore of the well, said flat wall having two diametrically opposite openings in alignment with the openings in the flange; c. a clamping plate having an opening receiving said nipple and two diametrically opposite openings in alignment with the openings in the flange and flat wall of the packing cup; d. a locking screw passing through one set of aligned openings; e. a coupling threaded onto said nipple and incorporating said pipe section into said pipe; and f. a packing gland assembly mounted in the opening in the flange below said recess and operable to provide an airtight seal with a cable passing through the other set of openings; said coupling when tightened clamping the flat wall of the packing cup between the flange and clamping plate whereby the packing cup is supported by the flange and clamping plate substantially throughout its horizontal extent.
Claim 2
Dependent Claim
290 words
For use in a well bore with a pump in the lower portion of the bore, a pipe extending upwardly from the pump through the bore and a cable extending upwardly from the pump through the bore, a well packer positioned in the well bore above the pump, said packer comprising: a. a pipe section having a lower end portion that is threaded to provide means to connect it to said pump, a bend above said threaded portion defining a recess at one side of the pipe section, a heavy flange integral with the pipe section at the upper end of the bend, and a threaded nipple above said flange, said flange being formed with two diametrically opposed openings, one of which is above said recess; b. a leather packing cup having a flat wall engaging said flange and a cylindrical wall snugly engageable with the bore of the well, said flat wall having two diametrically opposite openings in alignment with the openings in the flange; c. a clamping plate having an opening receiving said nipple and two diametrically opposite openings in alignment with the openings in the flange and flat wall of the packing cup; d. a locking screw passing through one set of aligned openings; e. a coupling threaded onto said nipple and incorporating said pipe section into said pipe; and f. a packing gland assembly mounted in the opening in the flange below said recess and operable to provide an airtight seal with a cable passing through the other set of openings; said coupling when tightened clamping the flat wall of the packing cup between the flange and clamping plate whereby the packing cup is supported by the flange and clamping plate substantially throughout its horizontal extent.
Claim 3
Dependent Claim
44 words
The well packer of claim 1 in which the flange is formed with a boss above the recess and the opening in the flange above the recess extends through the boss and is threaded to receive a threaded element of the packer gland assembly.
Claim 4
Dependent Claim
110 words
The well packer of claim 2 in which the packer gland assembly comprises a body having an upwardly extending threaded tubular extension received in the opening in the boss and a downwardly externally threaded extension having a conical bore, a deformable packing member having a conical portion received in said conical bore and a cylindrical bore, and a packing gland screwed onto said downward extension and having an internal lip operative upon rotation of said gland relative to said body to force the packing member into the conical bore to deform the packing member and cause its bore to grip a cable passing therethrough to provide an airtight seal therewith.
Claim 5
Dependent Claim
27 words
The well packer of claim 3 in which there is a metallic washer between an end of the packing member and the lip of the packing gland.
Claim 6
Dependent Claim
14 words
The well packer of claim 3 in which the packing member is of rubber.
Claim 7
Dependent Claim
24 words
The well packer of claim 1 in which the lower end of the pipe section is internally threaded and the nipple is externally threaded.