# US 8,464,786 B2 · Non basepipe-welded accessory attachment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,464,786 B2 - Document ID: US8464786B2 - Status: Granted - Kind: B2 - Application number: 12/840,043 - Filed: 2010-07-20 - Published: 2012-01-26 - Granted: 2013-06-18 - Earliest claimed: 2010-07-20 - Assignees: Schlumberger Technology Corporation - Applicants: Michael D. Langlais; Tage Thorkildsen - Inventors: Michael D. Langlais; Tage Thorkildsen - Web page: https://patentgrep.com/patent/US8464786B2 ## CPC - E21B 17/02: Couplings; joints {(expandable couplings or joints E21B43/106)} - F16B 7/0413: {for tubes using the innerside thereof (F16B7/025 takes precedence)} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) ## Abstract A gripping apparatus is provided having a stop collar with an accessory hardware coupled or otherwise attached thereto so as to not weld the accessory hardware directly to a production tubular. The gripping apparatus is adapted to grippingly engage the production tubular for downhole hydrocarbon recovery applications, and the accessory hardware can be a bracket or ring configured to support alternate path shunt tubes. The stop collar can also include centralizer blades coupled directly thereto, instead of welding the centralizer blades to the production tubular. ## Claims ### Claim 1 A gripping assembly, comprising: an annular main body having a central portion defining opposing first and second tapered surfaces; a lead ring threadably coupled to the main body; a packer ring threadably coupled to the main body; a first lock ring slidably disposed between the lead ring and the first tapered surface, wherein an end of the lead ring abuts an end of the first lock ring; a second lock ring slidably disposed between the packer ring and the second tapered surface, wherein tightening the lead ring to the main body and tightening the packer ring to the main body forces the first and second lock rings into gripping engagement between the opposing first and second tapered surfaces and an outer surface of a production tubular, thereby preventing axial movement of the gripping assembly along the production tubular; and an accessory hardware coupled to the packer ring. ### Claim 2 (depends on 1) The gripping apparatus of claim 1, wherein the first and second lock rings are split lock rings, and wherein the first and second lock rings are completely disposed between the main body and the production tubular. ### Claim 3 (depends on 2) The gripping apparatus of claim 2, further comprising one or more stop devices introduced into one or more holes defined within the annular main body, the one or more stop devices being inserted at least partially through the first and second split lock rings. ### Claim 4 (depends on 3) The gripping apparatus of claim 3, wherein the one or more stop devices comprises a threaded screw and the one or more holes threadably receives the threaded screw. ### Claim 5 (depends on 3) The gripping apparatus of claim 3, wherein the one or more stop devices comprises an elongated boss or wedge disposed axially along the production tubular. ### Claim 6 (depends on 1) The gripping apparatus of claim 1, wherein the accessory hardware comprises a bracket or ring configured to provide support for alternate path shunt tubes in a completion assembly. ### Claim 7 (depends on 1) The gripping apparatus of claim 1, wherein the accessory hardware is coupled to the packer ring by mechanically fastening the accessory hardware to the packer ring via one or more screws. ### Claim 8 (depends on 1) The gripping apparatus of claim 1, wherein the accessory hardware further comprises a threaded shoulder coupled to the packer ring by threadably engaging the threaded shoulder directly to the packer ring. ### Claim 9 (depends on 1) The gripping apparatus of claim 1, wherein the accessory hardware is coupled to the packer ring by welding the accessory hardware to the packer ring. ### Claim 10 (depends on 1) The gripping apparatus of claim 1, wherein the accessory hardware is coupled to the lead ring. ### Claim 11 (depends on 1) The gripping apparatus of claim 1, wherein an end of the packer ring abuts an end of the second lock ring. ### Claim 12 A gripping apparatus, comprising: an annular main body having a central portion defining opposing first and second tapered surfaces; a lead ring threaded to the main body; a packer ring threaded to the main body; a first lock ring slidably disposed between the lead ring and the first tapered surface, wherein an end of the lead ring abuts an end of the first lock ring, and a second lock ring slidably disposed between the packer ring and the second tapered surface, wherein tightening the lead ring to the main body and tightening the packer ring to the main body forces the first and second lock rings into gripping engagement between the opposing first and second tapered surfaces and an outer surface of a production tubular, thereby preventing axial movement of the gripping assembly along the production tubular; and one or more centralizer blades coupled to an outer surface of the annular main body and extending radially therefrom. ### Claim 13 (depends on 12) The gripping apparatus of claim 12, wherein the centralizer blades are coupled to the outer surface of the annular main body by welding the centralizer blades to the outer surface of the annular main body. ### Claim 14 (depends on 12) The gripping apparatus of claim 12, wherein the centralizer blades are coupled to the outer surface of the annular main body by mechanically fastening the centralizer blades to the outer surface of the annular main body. ### Claim 15 (depends on 12) The gripping apparatus of claim 12, wherein the centralizer blades are coupled to the outer surface of the annular main body by threadably engaging the centralizer blades to the outer surface of the annular main body. ### Claim 16 (depends on 12) The gripping apparatus of claim 12, wherein an end of the packer ring abuts an end of the second lock ring. ### Claim 17 A gripping apparatus, comprising: an annular main body having a central portion defining opposing first and second tapered surfaces, the annular main body further comprising an accessory hardware component; a lead ring threaded to the main body; a packer ring threaded to the main body; and a first split lock ring slidably disposed between the lead ring and the first tapered surface, wherein an end of the lead ring abuts an end of the first split lock ring, and a second split lock ring slidably disposed between the packer ring and the second tapered surface, and wherein tightening the lead ring to the main body and tightening the packer ring to the main body forces the first and second split lock rings into gripping engagement between the opposing first and second tapered surfaces and an outer surface of a production tubular, thereby preventing axial movement of the gripping assembly along the production tubular. ### Claim 18 (depends on 17) The gripping apparatus of claim 17, wherein the accessory hardware component is a bracket for suspending a shunt tube in an alternate path shunt system. ### Claim 19 (depends on 17) The gripping apparatus of claim 17, wherein the accessory hardware component comprises one or more centralizer blades. ### Claim 20 (depends on 17) The gripping apparatus of claim 17, further comprising one or more stop devices introduced into one or more holes defined within the annular main body, the one or more stop devices being inserted at least partially through the first and second split lock rings. ### Claim 21 (depends on 20) The gripping apparatus of claim 20, wherein the one or more stop devices comprises a threaded screw and the one or more holes threadably receives the threaded screw. ### Claim 22 (depends on 20) The gripping apparatus of claim 20, wherein the one or more stop devices comprises an elongated boss or wedge disposed axially along the production tubular. ### Claim 23 (depends on 17) The gripping apparatus of claim 17, wherein an end of the packer ring abuts an end of the second split lock ring.