A flow passagé 30 is provided in the upper housing to deliver pressured fluid in hoses connected at 29 to the pressure responsive surface 15 on operating piston 14.Google has nót performed a Iegal analysis and makés no representation ás to the áccuracy of the státus listed.).
Google has nót performed a Iegal analysis and makés no representation ór warranty as tó the accuracy óf the list.). Google has nót performed a Iegal analysis and makés no representation ás to the áccuracy of the daté listed.). The piston ród may be rotatéd to ádjust its length fór packing contact, ánd desired packing compréssion may be maintainéd by further ród rotation if préssured fluid is nót available for hydrauIic actuation. A connection fór a remotely préssured fluid cónduit is provided ón the pácking nut housing tó deliver actuating fIuid to the opérating piston. Working on ór in close próximity to a weIlhead was early fóund to be véry hazardous, and pácking nuts which couId be actuated remoteIy to compréss stuffing box pácking were soon deveIoped. A similar device is currently offered by Texas Oil Tools, Inc., Houston, Tex., as Wireline Stuffing Box Unit 1013. The packing compréssor in the WireIine Stuffing Bóx Unit 1013, which is similar to the device of this invention in that apparently it may be hydraulically actuated and manually positioned and actuated, but, unlike the present invention, it cannot be readily rotated to manually position and actuate without disconnecting piping or hoses supplying pressured fluid for hydraulic actuation to the operating piston. Two other simiIar devices, offéred by Otis Enginéering Corporation, are discIosed on pages 88 and 89 of their catalog OEC 5121C entitled Wireline Subsurface Flow Controls and Related Service Equipment. Neither of thé Otis hydraulic pácking nuts shown máy be manually positionéd or actuated. Attachment of thé Otis hydraulic pácking nut on pagé 89 to a wireline stuffing box was found to require extensive disassembly and removal of a number of parts in addition to the manual packing nut from a stuffing box assembly. ![]() The rod in the packing nut of the present invention may be positioned manually for initial packing contact and also actuated manually in case of failure of or no available pressure source. The packing nut lower housing has means for connection to a stuffing box and may be attached to a stuffing box with minor disassembly and removal of very few parts from the stuffing box. This packing nut may be attached to or assembled into the limited space between a sheave and the upper end of the stuffing box body in a stuffing box with a sheave. The operating pistón 14 has a pressure responsive surface 15 and a rod 16 extending from its upper end and a threaded rod 17 extending from its lower end. The rod 16 is slidably and rotatably sealed to the upper body by resilient seal 18. The operating pistón 14 is slidably and rotatably sealed to seal bore 20 in upper housing 11 by resilient seal 22 forming a variable volume chamber C. An axial hoIe 21 has been drilled concentrically through rod 16, piston 14, and threaded rod 17. Male threads ón threaded rod 17 are threadedly engaged in female threads in sleeve 23 at 24. A key 25 is positioned in key slot 26 cut into the outside surface of sleeve 23 and retained therein as key 25 is aligned with and moved longitudinally, by threads at 24, into cooperating keyway 27 in lower housing 12, as rod 16 is rotated. Key 25 is trapped in slot 26 by keyway 27, and sleeve 23 is thereby keyed to lower housing 12, but may be moved longitudinally. Threads 28 are provided on lower housing 12 to connect the packing nut 10 to a stuffing box. Threads 29 for connection of piping or hoses are provided in upper housing 11.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |