Patent Application
20050217877
The current invention is directed to an apparatus for rotating a threaded device, and more specifically to an apparatus for rotating and thus tightening or loosening a wing union nut, such as a wing union nut utilized in connecting high pressure manifold equipment.
There are a number of applications in the oil and gas industry which require the placement of threaded closure, connecting or tightening devices. Threaded nuts, caps, and other devices may be utilized to close the end of a tube or to connect threaded members together. Many such devices are essentially comprised of a body with an internal thread and a plurality of lugs. Space restraints and sometimes location often make the rotation of the threaded devices difficult. For example, wing union nuts utilized for high pressure manifold equipment are currently tightened using a hammer to hit the lugs on the wing union nut. It is difficult in confined spaces and/or in elevated locations such as a derrick to hammer the wing nut. Oftentimes, the hammer will glance off the lug or will miss the lug completely. Such situations can be a safety hazard to the operator and may also cause damage to other equipment.
The current invention provides an apparatus for rotating a threaded device onto or off of a threaded member or members. The threaded device may comprise, for example, a threaded closure, connecting or securing device such as a cap device utilized to close a threaded container, or a wing union nut utilized to connect threaded members in high pressure manifold equipment. The threaded device may comprise a threaded body having a plurality of lugs extending from the body. The apparatus of the current invention includes a guide which will support a reciprocating anvil. The reciprocating anvil is positioned to impact one of the lugs so that it will rotate the threaded device in the desired direction.
The apparatus also includes a reciprocating device. The anvil is received in the reciprocating device, which will reciprocate the anvil so that it repetitively impacts the lug to rotate the tightening device. The guide may include a support frame with a support sleeve connected thereto. The support frame has a pair of opposed side plates, and the support sleeve is mounted between the side plates. The reciprocating device is received in the support sleeve and is positioned so that the anvil impacts one of the lugs on the threaded tightening device. Another of the lugs is received in a slot in the frame. The support frame will contact the body of the threaded device when the reciprocating device is being used to reciprocate the anvil so as to impact a lug and rotate the tightening device.
Referring now to the drawings and more particularly to
Reciprocating device 25 may comprise a chipping hammer such as, for example, an Ingersoll-Rand W Series chipping hammer comprising a handle or handle portion 40 and a barrel or barrel portion 42. As is known in the art, a rubber buffered retainer 44 such as for example Ingersoll-Rand part number HHW 1-A300 may be threaded to a forward end 43 of barrel 42. Retainer 44 may include, as is known in the art, upper and lower buffer washers 46 and 48, respectively, which may be, for example, H3R-31 and HHWI-213 upper and lower buffer washers. A rubber bumper 50 such as, for example, Ingersoll-Rand Part No. H3R-203 may be positioned between upper and lower buffer washers 46 and 48, respectively. A lock clip 52 may be disposed about a groove 54 in retainer 44. The arrangement of parts described herein is essentially a standard arrangement for rubber buffer retainer 44.
Anvil 20 has first, or forward end 58 adapted to impact a lug 38, and a second, or rear end (not shown) received in reciprocating device 25. Anvil 20 has a shoulder or collar 60 positioned between first end 58 and the second end thereof. Anvil 20 is mounted to reciprocating device 25 such that actuation thereof will cause anvil 20 to reciprocate in a jackhammer effect so that it will repetitively impact one of the lugs 38 on the threaded device being rotated, such as threaded device 30. First, or forward end 58 of anvil 20 is preferably a blunt, flat end adapted to engage or impact one of lugs 38. Anvil 20 is similar to other tools that may be utilized with a chipping hammer, such as, for example, a one-inch flat chisel, Ingersoll-Rand H3R series. Anvil 20, however, has a blunt end to impact lugs 38, rather than a blade or chisel end.
Guide 15 supports reciprocating device 25 and thus supports anvil 20 and positions anvil 20 to impact a lug 38. The jackhammer effect of reciprocating device 25 will cause anvil 20 to repeatedly engage a lug 38 and rotate threaded device 30 in the desired direction. Thus, if threaded device 30 is a wing union nut, rotation thereof will cause the wing union nut to be threaded onto, or off of high pressure manifold equipment known in the art. Retainer 44 is a modified retainer and has a groove 62 defined in an outer surface thereof. When barrel portion 42 is positioned in guide 15, a retainer 64, such as a split ring retainer, is placed in groove 62 to prevent reciprocating device 25 from inadvertent removal from guide 15.
Guide 15 comprises a frame 70, which may be referred to as support frame 70, and a sleeve or support sleeve 72. Support frame 70 comprises a pair of opposed side plates 74 which may comprise first and second side plates 76 and 78, respectively. Side plates 76 and 78 are preferably mirror images of one another and include a plurality of lightening holes 80. Side plates 74 have an edge 82 to which a support plate 84 is affixed by welding or other means known in the art. Support sleeve 72 is positioned between side plates 76 and 78 and is mounted thereto by welding or other means known in the art. Support sleeve 72 has a first or forward end 88 and a second or rear end 90. Support sleeve 72 defines a first inner diameter 92 extending forward from the rear end 90 thereof and a second inner diameter 94 concentric with diameter 92. Second inner diameter 94 is smaller than first inner diameter 92.
As viewed in
Support plate 84 has three sides 101 designated first, second and third sides 102, 104 and 106 and in the side view shown in
Guide 15 is positioned so that one of lugs 38, which will be referred to for ease of reference as lugs 120, 122 and 124 is received in opening 110. In the embodiment shown, the lug 122 is received in opening 110. A space 126 is defined between lug 122 and the upper edge or top 114 of opening 110. Another of lugs 38 and in the embodiment shown lug 120 which is a lug adjacent lug 122 is positioned in slot 107 between panels 108 and ribs 100.
To operate apparatus 10, reciprocating device 25 is inserted in support sleeve 72. Specifically, retainer 44 is received in support sleeve 72. Split ring retainer 64 is placed in groove 62 to prevent reciprocating device 25 from inadvertently slipping out of support sleeve 72. One of lugs 38 is received in opening 110 defined in guide 15, in this case lug 122, while an adjacent lug 38, in this case lug 120, is positioned to be impacted by anvil 20. Reciprocating device 25 creates a jackhammer effect to rotate the threaded device 30 in the desired direction to tighten or loosen the threaded device, or to connect or disconnect threaded members. In the case of a closure device, the threaded device 30 is rotated to open or close the member which is threadedly engaged. Because opening 110 has a height which provides space 126, threaded device 30 will move when reciprocating device 25 is actuated to cause the anvil 20 to impact lug 120. Reciprocating device 25 can be rotated relative to a central axis of barrel portion 42 using handle portion 40, which provides for easy positioning and actuation in confined spaces or locations that are difficult to access.
Thus, the present invention is well adapted to carry out the object and advantages mentioned as well as those which are inherent therein. While numerous changes may be made by those skilled in the art, such changes are encompassed within the spirit of this invention as defined by the appended claims.
