One way flow blowout preventer side port

Abstract

A blowout preventer stack may include a body with a vertical bore and a horizontal bore intersecting the vertical bore. The blowout preventer stack may include a side port extending from the vertical bore to an outer side surface of the body. The blowout preventer stack may also include a pair of rams disposed in the horizontal bore, each ram disposed at opposite ends of the horizontal bore and moveable within the horizontal bore to and from the vertical bore. The blowout preventer stack includes a one-way check valve coupled to the side port of the body. The one-way check valve may allow fluid flow into the blowout preventer stack and block fluid flow from exiting the blowout preventer stack.

What is claimed is: 
     
         1 . A blowout preventer stack, comprising:
 a body comprising:
 a vertical bore extending through the body, 
 a horizontal bore extending across the body and intersecting the vertical bore, and 
 a side port extending from the vertical bore to an outer side surface of the body; 
   a pair of rams disposed in the horizontal bore, each ram disposed at opposite ends of the horizontal bore and moveable within the horizontal bore to and from the vertical bore; and   a one-way check valve coupled to the side port of the body.   
     
     
         2 . The blowout preventer stack of  claim 1 , wherein the one-way check valve allows flow into the body and blocks flow from exiting the body. 
     
     
         3 . The blowout preventer stack of  claim 2 , wherein the one-way check valve comprises a ball and a spring moveable within a bore of the one-way check valve. 
     
     
         4 . The blowout preventer stack of  claim 1 , further comprising at least one of a top equalizing valve or a bottom equalizing valve. 
     
     
         5 . The blowout preventer stack of  claim 4 , wherein the top equalizing valve and the bottom equalizing valve equalize a pressure in the blowout preventer stack. 
     
     
         6 . The blowout preventer stack of  claim 1 , wherein the pair of rams is selected from the group consisting of a pair of blind rams, a pair of shear rams, a pair of slip rams, and a pair of pipe rams. 
     
     
         7 . The blowout preventer stack of  claim 1 , wherein the body further comprises a plurality of horizontal bores extending across the body and intersecting the vertical bore, the blowout preventer stack further comprising a plurality of pairs of rams, a pair of rams disposed in each of the plurality of horizontal bores, each pair of rams of the plurality of pairs of rams disposed at opposite ends of the plurality of horizontal bores and moveable within the plurality of horizontal bores to and from the vertical bore. 
     
     
         8 . A method, comprising:
 installing a blowout preventer stack on a well, the blowout preventer stack comprising:
 a body comprising:
 a vertical bore extending through the body, 
 a horizontal bore extending across the body and intersecting the vertical bore, and 
 a side port extending from the vertical bore to an outer side surface of the body; 
 
 a pair of rams disposed in the horizontal bore, each ram disposed at opposite ends of the horizontal bore and moveable within the horizontal bore to and from the vertical bore; 
 a one-way check valve coupled to the side port of the body; and 
   flowing fluid into the side port of the blowout preventer stack through the one-way check valve while restricting flow out of the side port.   
     
     
         9 . The method of  claim 8 , further comprising actuating at least one pair of rams of the blowout preventer stack while flowing fluid into the side port. 
     
     
         10 . The method of  claim 8 , wherein the one-way check valve comprises a ball and spring, the method further comprising:
 moving the ball in a first direction within a bore of the one-way check valve toward the spring and compressing the spring, thereby allowing fluid flow through the one-way check valve and into the blowout preventer stack; and   moving the ball in a second, opposite direction within the one-way check valve against a narrowed diameter of the bore of the one-way check valve, thereby restricting fluid flow through the one-way check valve and out of the blowout preventer stack.   
     
     
         11 . The method of  claim 8 , further comprising adjusting a fluid flow through at least one of a top equalizing valve or a bottom equalizing valve coupled to the body. 
     
     
         12 . The method of  claim 11 , wherein adjusting a pressure through the top equalizing valve and adjusting the pressure through the bottom equalizing valve equalizes the pressure in the blowout preventer stack to permit opening of the blowout preventer stack. 
     
     
         13 . The method of  claim 8 , wherein the body further comprises a plurality of horizontal bores extending across the body and intersecting the vertical bore, the blowout preventer stack further comprising a plurality of pairs of rams disposed in the plurality of horizontal bores, each ram of the plurality of pairs of rams disposed at opposite ends of each of the plurality of horizontal bores and moveable within the plurality of horizontal bores to and from the vertical bore. 
     
     
         14 . A system, comprising:
 a blowout preventer stack, the blowout preventer stack comprising:
 a body having a vertical bore extending through the body, a first horizontal bore extending across the body and intersecting the vertical bore, a second horizontal bore an axial distance below the first horizontal bore and extending across the body and intersecting the vertical bore, the body comprising a side port extending from the vertical bore to an outer side surface of the body; 
 a first pair of rams disposed in the first horizontal bore, each ram of the first pair of rams disposed at opposite ends of the first horizontal bore and moveable within the first horizontal bore to and from the vertical bore; 
 a second pair of rams disposed in the second horizontal bore, each ram of the second pair of rams disposed at opposite ends of the second horizontal bore and moveable within the second horizontal bore to and from the vertical bore; and 
 a side port disposed through a side wall of the body; and 
   a one-way check valve coupled to the side port of the body.   
     
     
         15 . The system of  claim 14 , wherein the one-way check valve allows flow into the body and restricts flow from exiting the body. 
     
     
         16 . The system of  claim 14 , further comprising a top equalizing valve coupled to the body of the blowout preventer stack. 
     
     
         17 . The system of  claim 16 , further comprising a bottom equalizing valve coupled to the body of the blowout preventer stack. 
     
     
         18 . The system of  claim 17 , wherein the top equalizing valve and the bottom equalizing valve equalize a pressure in the blowout preventer stack to permit opening of the blowout preventer stack. 
     
     
         19 . The system of  claim 14 , wherein the first pair of rams and the second pair of rams is selected from the group consisting of a pair of blind rams, a pair of shear rams, a pair of slip rams, and a pair of pipe rams. 
     
     
         20 . The system of claim of  claim 14 , wherein the body further comprises a plurality of horizontal bores extending across the body and intersecting the vertical bore, the blowout preventer stack further comprising a plurality of pairs of rams with one pair of rams disposed in each of the plurality of horizontal bores, each pair of rams of the plurality of pairs of rams disposed at opposite ends of the plurality of horizontal bores and moveable within the plurality of horizontal bores to and from the vertical bore.