Multilateral Junction with Feed-Through

Abstract

A hydrocarbon production assembly within a multilateral wellbore, the multilateral wellbore having a main bore portion which extends downwardly from surface and a lateral leg which extends radially away from the main bore portion.

What is claimed is: 
     
         1 . A hydrocarbon production assembly within a multilateral wellbore, the multilateral wellbore having a main bore portion which extends downwardly from surface and a lateral leg which extends radially away from the main bore portion, the completion arrangement comprising:
 a lateral leg completion arrangement located within the lateral leg and having a tubular conduit which defines a flowbore along its length and at least one first flow controller which can be opened and closed to selectively allow fluid communication with the flowbore;   a main bore completion arrangement located within the main bore portion, the main bore completion arrangement having a tubular conduit which defines a flowbore along its length and at least one second flow controller which can be opened and closed to selectively allow fluid communication with the flowbore;   a first isolation string which resides within the lateral leg completion arrangement, the first isolation string comprising a tool string having a valve actuator which actuates the at least one first valve between open and closed positions; and   a second isolation string which resides within the main bore completion arrangement, the second isolation string comprising a tool string having a valve actuator which actuates the at least one second valve between open and closed positions.   
     
     
         2 . The hydrocarbon production assembly of  claim 1  wherein:
 the at least one first flow controller permits fluid flow outwardly from the flowbore of the lateral leg completion assembly; and 
 the at least one second flow controller permits fluid flow outwardly from the flowbore of the main bore completion assembly. 
 
     
     
         3 . The hydrocarbon production assembly of  claim 1  wherein:
 the at least one first flow controller permits fluid flow inwardly to the flowbore of the lateral leg completion assembly; and 
 the at least one second flow controller permits fluid flow inwardly to the flowbore of the main bore completion assembly. 
 
     
     
         4 . The hydrocarbon production assembly of  claim 1  wherein at least one of the first and second isolation strings further comprises a monitoring gauge which is positioned proximate the valve of the respective main bore or lateral leg completion arrangement when seated within to measure at least one fluid flow related parameter as fluid is flowed through the flowbore of the respective main bore or lateral leg completion arrangement. 
     
     
         5 . The hydrocarbon production assembly of  claim 1  further comprising a communication work string that is interconnected with the first and second isolation strings to provide a communication line between the first and second isolation strings and at least one transmission/reception device at the surface. 
     
     
         6 . The hydrocarbon production assembly of  claim 1  further comprising a feed-through device having:
 a mandrel to be seated within the main bore portion; 
 an opening disposed within the mandrel through which the second isolation string is disposed into the main bore completion arrangement; and 
 a downhole mating connector for connecting a communication line with the first isolation string. 
 
     
     
         7 . The hydrocarbon production assembly of  claim 6  wherein the mandrel of the feed-through device is seated upon a seal bore diverter which is disposed upon the main bore completion arrangement. 
     
     
         8 . The hydrocarbon production assembly of  claim 5  wherein the at least one transmission/reception device is at least one of the group consisting of: electrical power generator, hydraulic fluid pump, optical time domain reflectometer and processor. 
     
     
         9 . The hydrocarbon production assembly of  claim 5  wherein the communication line comprises at least one of the group consisting of: electrical power conduit, hydraulic conduit, optical fiber, and electrical data cable. 
     
     
         10 . A hydrocarbon production assembly within a multilateral wellbore, the multilateral wellbore having a main bore portion which extends downwardly from surface and a lateral leg which extends radially away from the main bore portion, the completion arrangement comprising:
 a lateral leg completion arrangement located within the lateral leg and having a tubular conduit which defines a flowbore along its length and at least one first flow controller which can be opened and closed to selectively allow fluid communication with the flowbore;   a main bore completion arrangement located within the main bore portion, the main bore completion arrangement having a tubular conduit which defines a flowbore along its length and at least one monitoring gauge which detects a parameter related to fluid flow proximate an at least one second flow controller;   a first isolation string which resides within the lateral leg completion arrangement, the first isolation string comprising a tool string having a valve actuator which actuates the at least one first flow controller between open and closed positions; and   a second isolation string which resides within the main bore completion arrangement.   
     
     
         11 . The hydrocarbon production assembly of  claim 10  further comprising a communication work string that is interconnected with the first and second isolation strings to provide a communication line between the first and second isolation strings and at least one transmission/reception device at the surface. 
     
     
         12 . The hydrocarbon production assembly of  claim 10  further comprising a feed-through device having:
 a mandrel to be seated within the main bore portion; 
 an opening disposed within the mandrel through which the second isolation string is disposed into the main bore completion arrangement; and 
 a downhole mating connector for connecting a communication line with the first isolation string. 
 
     
     
         13 . The hydrocarbon production assembly of  claim 12  further comprising a whipstock and seal bore diverter which is disposed atop the main bore completion arrangement. 
     
     
         14 . The hydrocarbon production assembly of  claim 13  wherein the mandrel of the feed-through device is seated upon the seal bore diverter. 
     
     
         15 . The hydrocarbon production assembly of  claim 11  wherein the at least one transmission/reception device is at least one of the group consisting of: electrical power generator, hydraulic fluid pump, optical time domain reflectometer and processor. 
     
     
         16 . The hydrocarbon production assembly of  claim 11  wherein the communication line comprises at least one of the group consisting of: electrical power conduit, hydraulic conduit, optical fiber, and electrical data cable. 
     
     
         17 . The hydrocarbon production assembly of  claim 10  wherein the second isolation string comprising a tool string having a valve actuator which actuates the at least one second flow controller between open and closed positions. 
     
     
         18 . A hydrocarbon production assembly within a multilateral wellbore, the multilateral wellbore having a main bore portion which extends downwardly from surface and a lateral leg which extends radially away from the main bore portion, the completion arrangement comprising:
 a lateral leg completion arrangement located within the lateral leg and having a tubular conduit which defines a flowbore along its length and at least one first flow controller which can be opened and closed to selectively allow fluid communication with the flowbore;   a main bore completion arrangement located within the main bore portion, the main bore completion arrangement having a tubular conduit which defines a flowbore along its length and at least one second flow controller which can be opened and closed to selectively allow fluid communication with the flowbore;   a first isolation string which resides within the lateral leg completion arrangement, the first isolation string comprising a tool string having a valve actuator which actuates the at least one first flow controller between open and closed positions;   a second isolation string which resides within the main bore completion arrangement, the second isolation string comprising a tool string having a valve actuator which actuates the at least one second flow controller between open and closed positions; and   a communication work string that is interconnected with the first and second isolation strings to provide a communication line between the first and second isolation strings and at least one transmission/reception device at the surface.   
     
     
         19 . The hydrocarbon production assembly of  claim 18  further:
 the at least one first flow controller permits fluid flow outwardly from the flowbore of the lateral leg completion assembly; and 
 the at least one second flow controller permits fluid flow outwardly from the flowbore of the main bore completion assembly. 
 
     
     
         20 . The hydrocarbon production assembly of  claim 18  further:
 the at least one first flow controller permits fluid flow inwardly to the flowbore of the lateral leg completion assembly; and 
 the at least one second flow controller permits fluid flow inwardly to the flowbore of the main bore completion assembly.