Oil field system for through tubing rotary drilling

摘要

An oil field system comprising a main body having a bore therethrough, the main body having a connection at one end of the bore for, in use, connecting the main body to an existing wellhead, tree or other oil field equipment, a transverse cavity through the bore, the cavity having at least one opening to the outside of the main body, a plurality of flow control devices for insertion, at different times, into the cavity in order to selectively control fluid flow through the bore, wherein the plurality of flow control devices includes a gate valve and drilling BOP rams.

主权项

1. An oil field system comprising:
a main body having a bore therethrough, the main body comprising a connection at one end of the bore for, in use, connecting the main body to an existing wellhead, tree, or other oil field equipment; a transverse cavity extending along an axis through the bore and comprising openings to the outside of the main body on opposite sides and along the axis; a plurality of flow control devices for insertion, at different times, into the cavity to selectively control fluid flow through the bore; wherein the plurality of flow control devices includes a gate valve comprising a single part slidable to close fluid flow through the main body bore and drilling BOP rams designed to seal during drilling operations; wherein the cavity is shaped so as to be sealable either by the gate valve or the drilling BOP rams to control fluid flow through the main body bore; and wherein the main body comprises recessed portions in a wall of the bore for receiving valve seats for engagement, in use, with the gate valve.