Ram shaft assembly for blowout preventer

Abstract

A ram shaft assembly is provided. In one embodiment, a system includes a ram actuation assembly of a blowout preventer. The ram actuation assembly can include a ram shaft, one or more mounting members positioned about the ram shaft, and a piston mounted on the one or more mounting members. Additional systems, devices, and methods are also disclosed.

1 . A system comprising:
 a ram actuation assembly of a blowout preventer, the ram actuation assembly including:
 a ram shaft; 
 one or more mounting members positioned about the ram shaft; and 
 a piston mounted on the one or more mounting members. 
   
     
     
         2 . The system of  claim 1 , comprising a split mounting ring including the one or more mounting members. 
     
     
         3 . The system of  claim 1 , wherein the piston is connected to the one or more mounting members by fasteners inserted through holes in the one or more mounting members and into threaded recesses in the piston. 
     
     
         4 . The system of  claim 1 , wherein the one or more mounting members are positioned within a groove of the ram shaft. 
     
     
         5 . The system of  claim 1 , comprising a seal between the piston and the ram shaft. 
     
     
         6 . The system of  claim 1 , wherein the one or more mounting members are positioned within a recess of the piston. 
     
     
         7 . The system of  claim 1 , wherein the ram shaft does not have a threaded surface. 
     
     
         8 . The system of  claim 1 , wherein the ram shaft is made of a different material than the one or more mounting members and the piston. 
     
     
         9 . The system of  claim 8 , wherein the ram shaft is made of stainless steel and each of the one or more mounting members and the piston is made of non-stainless steel. 
     
     
         10 . The system of  claim 1 , wherein the ram shaft includes a ram button. 
     
     
         11 . The system of  claim 10 , comprising a ram installed on the ram button of the ram shaft. 
     
     
         12 . The system of  claim 1 , comprising the blowout preventer. 
     
     
         13 . A system comprising:
 a ram actuation assembly of a blowout preventer, the ram actuation assembly including a shaft having an external groove, a split ring having multiple segments, and a piston having an aperture to receive the shaft and a recess configured to encompass the multiple segments, wherein the multiple segments of the split ring are configured to be positioned radially about the shaft within the external groove and to enable the piston to be coupled to the shaft via the multiple segments.   
     
     
         14 . The system of  claim 13 , wherein the shaft is formed of a single piece of stainless steel. 
     
     
         15 . The system of  claim 13 , wherein the piston is fastened to the multiple segments by a plurality of cap screws. 
     
     
         16 . The system of  claim 13 , wherein the shaft is received through the aperture of the piston, the multiple segments are positioned radially about the shaft within the external groove, and the piston is coupled to the shaft via the multiple segments. 
     
     
         17 . A method comprising:
 positioning segments of a split mounting ring about a blowout preventer ram shaft; and   coupling a piston to the segments of the split mounting ring such that the piston is connected to the blowout preventer ram shaft via the segments of the split mounting ring.   
     
     
         18 . The method of  claim 17 , wherein coupling the piston to the segments of the split mounting ring includes receiving the segments of the split mounting ring in a recess of the piston and fastening the segments of the split mounting ring to the piston. 
     
     
         19 . The method of  claim 17 , wherein positioning the segments of the split mounting ring about the blowout preventer ram shaft includes positioning the segments in a groove of the blowout preventer ram shaft. 
     
     
         20 . The method of  claim 17 , comprising forming the ram shaft from stainless steel bar stock.