Manifold implemented in multi-channel system for controlling flow of fluids in oil well

Abstract

Manifold for controlling flow of fluids in multi-channel system deployed in oil well including an orifice formed between inlet ports and outlet ports. The orifice receives fluid through inlet ports and is in fluid communication with a pressure system and tank. The manifold includes a check valve connecting the orifice and receiving/controlling flow of fluid. The manifold includes a gas charged accumulator adapted to store hydraulic energy generated at an inlet of the gas charged accumulator when pressure of the fluid becomes greater than a precharge pressure. The manifold includes a flow control valve connecting the check valve and gas charged accumulator. The flow control valve and gas charged accumulator control the opening of the check valve and prevent improper operation of the manifold. The gas charged accumulator dumps fluid into the tank quickly when the flow control valve moves out of its intended position during a failure of drilling operation.

What is claimed is: 
     
         1 . A manifold, comprising:
 an orifice formed between inlet ports and outlet ports, wherein said orifice receives fluid through inlet ports, and wherein said orifice is in a fluid communication with a pressure system and a tank;   a check valve connecting said orifice, wherein said check valve receives and controls the flow the fluid;   a gas charged accumulator adapted to store hydraulic energy generated at an inlet of said gas charged accumulator when pressure of the fluid becomes greater than a precharge pressure; and   a flow control valve connecting said check valve and said gas charged accumulator,   wherein said flow control valve and said gas charged accumulator control the opening of said check valve and prevent improper operation of said manifold, and   wherein said gas charged accumulator dumps the fluid into said tank quickly when said flow control valve moves out of its intended position during a failure of drilling operation.   
     
     
         2 . The manifold of  claim 1 , wherein said gas charged accumulator dumps the fluid into said tank quickly via a solenoid valve. 
     
     
         3 . The manifold of  claim 1 , wherein said gas charged accumulator bleeds down the fluid on a time delay and prevents said check valve from opening too soon. 
     
     
         4 . The manifold of  claim 1 , wherein said flow control valve is a check-resistor valve. 
     
     
         5 . The manifold of  claim 1 , wherein said flow control valve further comprises a check valve and an orifice with a screen. 
     
     
         6 . The manifold of  claim 1 , wherein said manifold is made of steel or steel alloy. 
     
     
         7 . The manifold of  claim 1 , wherein said manifold is fabricated by machining of a single block of steel or steel alloy. 
     
     
         8 . The manifold of  claim 1 , wherein said manifold comprises a coating from a group consisting of a zinc-nickel plated ductile iron, a ceramic coating, a passivation layer or a corrosion prevention layer. 
     
     
         9 . A method of providing a manifold, said method comprising steps of:
 providing an orifice formed between inlet ports and outlet ports, said orifice receiving fluid through inlet ports, said orifice in a fluid communication with a pressure system and a tank;   providing a check valve connecting said orifice, said check valve receiving the fluid;   providing a gas charged accumulator adapted to store energy;   providing a flow control valve connecting said check valve and said gas charged accumulator;   controlling the opening of said check valve and preventing improper operation of said manifold using said flow control valve and said gas charged accumulator control; and   operating said gas charged accumulator for dumping the fluid into said tank quickly when said flow control valve moves out of its intended position during a failure of drilling operation.   
     
     
         10 . The method of  claim 9 , further comprising dumping the fluid into said tank quickly via a solenoid valve. 
     
     
         11 . The method of  claim 9 , further comprising bleeding down the fluid from said gas charged accumulator on a time delay for preventing said check valve from opening too soon.