Extended range emf antenna
View Patent ↗A measuring while drilling system typically has a metal pipework extending underground connected to an antenna. The metal pipework and the antenna are both connected to a type of downhole equipment. The antenna transmits or receives signals to/from a transceiver located on the surface, and the transceiver is connected to the metal pipeword and to a ground. The system is improved by joining a plurality of sections of wired drill pipe together to form a section where the antenna is integral with the metal pipework. One end of the section of wired drill pipe is joined to downhole equipment and another end is joined to a conventional metal pipework.
1. In a method for telemetering information between a type of down hole equipment at a bottom of an operation and a surface, comprising the steps of:
providing a transceiver at the surface;
installing one end of a section of wired drill pipe on a type of downhole equipment;
installing a conventional metal pipework to the other end of the section of wired drill pipe;
using the section of wired drill pipe as a long dipole antenna for a well operation located below a surface from which the conventional metal pipework emanates and providing the long dipole antenna proximate the downhole equipment at the bottom of the operation; and
transmitting from the section of wired drill pipe forming the long dipole antenna to the transceiver at the surface for extended range emf signaling.
2. The method according to claim 1 wherein the section of wired drill pipe is a first section of wired drill pipe, further including the step of attaching a second section of wired drill pipe to the first section of wired drill pipe for connection between the downhole equipment and the conventional metal pipework.
3. The method according to claim 2 , further including joining additional sections of wired drill pipe for forming an antenna having a length ranging from 2,000 to 5,000 feet.
4. The method according to claim 2 , further including joining additional sections of wired drill pipe for forming an antenna having a length ranging from 2,000 to 9,000 feet.
5. In an apparatus for telemetering information between a type of downhole equipment at a bottom of an operation and a surface, the improvement comprising:
a transceiver at the surface connected to both a ground, spaced from the operation;
a conventional metal pipework, the conventional metal pipework emanating from a rig at the surface;
a plurality of sections of wired drill pipe joined together to form a long dipole antenna for applying signals between two points, wherein one end of said plurality of sections of wired drill pipe is connected to the conventional metal pipework;
a type of downhole equipment connected to the other end of said plurality of sections of wired drill pipe.
6. The apparatus according to claim 5 , wherein the length of said plurality of sections of wired drill pipe joined together is a constant ranging from 2,000 to 9,000 feet.
7. The apparatus according to claim 5 , wherein the length of said plurality of sections of wired drill pipe joined together is a constant ranging from 2,000 to 5,000 feet.
8. The apparatus according to claim 5 wherein said plurality of sections of wired drill pipe include a drill pipe casing with a wall; and a wire embedded into the wall of the drill pipe casing.