Geared Packing Nut System

Abstract

The invention is a set of reduction gears constructed to aid the installation or removal of a packing nut or similar equipment part onto or from an oil field pump. A first gear is integrated onto a packing nut or other threaded part to a piece of oil field equipment. The first gear is placed in rotational contact with a second gear rotatably mounted on the surface of a fluid end. The second gear is a reduction gear which a worker can turn to thread the first gear of the packing nut. The invention includes a pawl set against the first gear prevent unwanted loosening of the packing nut during operations.

We claim: 
     
         1 . A geared packing nut assembly for a fluid end suitable to insert a packing nut into or to remove a packing nut from a the fluid end comprising:
 a threaded packing nut operatively integrated with a first toothed gear in which
 the threads of the packing nut are mated to the threads of a corresponding hole on a fluid end used for pumping fluids into a well hole and 
 in which the threads of the packing nut have a height and 
 in which the teeth of the first toothed gear have a thickness and 
 in which the packing nut has an inner diameter sized to fit a fluid end plunger for the fluid end and in which the first toothed gear has an inner diameter larger than the inner diameter of the packing nut; 
   a second toothed gear in which
 the teeth of the second toothed gear have a thickness and 
 in which the second toothed gear further comprises a rod projecting from the longitudinal axis of the second toothed gear suitable to insert into a suitable hole on the fluid end. 
   
     
     
         2 . The geared packing nut assembly of  claim 1  in which the height of the teeth of the second gear, the height of the threads of the packing nut element and the height of the teeth of the first toothed gear permit the teeth of the first toothed gear, when the threads of the packing nut are hand threaded into a fluid end, to engage the teeth of the second gear. 
     
     
         3 . The geared packing nut assembly of  claim 1  in which the threads of the packing nut permit hand-tightening of the geared packing nut assembly into the threads of the fluid end sufficient for the teeth of the first toothed gear to engage the teeth of the second toothed ger. 
     
     
         4 . (canceled) 
     
     
         5 . The geared packing nut assembly of  claim 1  which further comprises a pawl further comprising a rod suitable to insert into a hole on the fluid end permitting the pawl to hold the first toothed gear in place. 
     
     
         6 . (canceled) 
     
     
         7 . (canceled)