Drilling rig floor drainage system

Abstract

A drainage system is provided for a drilling rig which includes a module that can be removably mounted on the rig. The module has a top panel having drainage slots disposed about its perimeter. The module further includes a substructure containing a trough located beneath the drainage slots. The trough slopes downwardly towards an outlet aperture that extends through a sidewall of the substructure. Fluids spilled onto the module when sections of drilling pipe are tripped out from the drill string drain through the drainage slots into the trough. The trough guides the fluids through the outlet aperture where the fluids can be directed to a collection pit or vessel where they can be recycled or properly disposed of.

1 . A drainage system for draining fluids from a drilling rig floor of a drilling rig, comprising: 
 a) a substantially horizontal drilling floor surface configured to define at least a portion of a drilling rig floor;    b) a trough disposed underneath said drilling floor surface;    c) a plurality of drainage openings disposed on said drilling floor surface, said openings located above said trough whereby fluids on said drilling floor surface are able to drain through said openings into said trough; and    d) an outlet aperture operatively attached to said trough, the combination of said trough and said aperture adapted to guide said fluids away from a drilling rig floor.    
   
   
       2 . The drainage system as set forth in  claim 1  wherein said trough and said openings are disposed at least partially about a perimeter of said drilling floor surface.  
   
   
       3 . The drainage system as set forth in  claim 2  wherein said trough slopes downwardly towards said outlet aperture.  
   
   
       4 . The drainage system as set forth in  claim 1  wherein said drilling floor surface is the top surface of a drilling rig module, said module adapted to be removably mounted on a drilling rig.  
   
   
       5 . The drainage system as set forth in  claim 4  wherein said trough is disposed within said module and said outlet aperture is adapted to guide said fluids through an opening in a sidewall of said module.  
   
   
       6 . The drainage system as set forth in  claim 5  wherein said trough and said openings are disposed at least partially about a perimeter of said drilling floor surface.  
   
   
       7 . The drainage system as set forth in  claim 6  wherein said trough slopes downwardly towards said outlet aperture.