Methods and systems for performance of subterranean operations using dual string pipes

Patent metadata

Field	Value
Publication number	US-9856706-B2
Application number	US-201214403298-A
Country	US
Kind code	B2
Filing date	Jun 5, 2012
Priority date	Jun 5, 2012
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

Methods and systems for delivery and retrieval of fluids to and from a downhole location are disclosed. A dual string pipe ( 202 ) is provided which comprises an outer pipe ( 206 ), an inner pipe ( 204 ) positioned within the outer pipe, and a bottom hole assembly ( 210 ) fluidically coupled to the outer pipe and the inner pipe. A diverter sub ( 208 ) is coupled to the inner pipe and is selectively operable in a normal drilling mode and a high flow mode. In the normal drilling mode a fluid is directed downhole through the inner pipe and in the high flow mode a return fluid is directed uphole through the inner pipe.

First claim

What is claimed is:

1. A dual string pipe comprising:
an outer pipe;
an inner pipe positioned within the outer pipe;
a bottom hole assembly fluidically coupled to the outer pipe and the inner pipe;
a diverter sub coupled to the inner pipe,
wherein the diverter sub is selectively operable in a normal drilling mode and a high flow mode,
wherein in the normal drilling mode the diverter sub is in a closed position, and
wherein in the high flow mode the diverter sub is in an open position;

a casing, wherein the outer pipe is positioned within the casing;
a first annulus, wherein the first annulus is formed between the inner pipe and the outer pipe, wherein in the normal drilling mode a fluid from a surface is directed downhole through the inner pipe and the first annulus, and wherein in the high flow mode the fluid is directed downhole through the first annulus and a return fluid is directed uphole through the inner pipe;
a second annulus, wherein the second annulus is formed between the outer pipe and the casing; and
a packer coupled to the outer pipe, wherein the packer extends into the second annulus, wherein the packer comprises one or more valves, wherein the one or more valves are operable to fluidically couple the second annulus with at least one of the first annulus and the inner pipe, and wherein an additional fluid is directed into the first annulus through the second annulus and the packer.

2. The dual string pipe of claim 1 , wherein the diverter sub comprises a return port, wherein in the high flow mode the return fluid flows into the inner pipe through the return port.

3. The dual string pipe of claim 2 , wherein the diverter sub comprises a return port valve, wherein the return port valve selectively opens and closes the return port.

4. The dual string pipe of claim 3 , wherein the diverter sub comprises an inner pipe valve, wherein the inner pipe valve selectively opens and closes an outlet of the inner pipe.

5. The dual string pipe of claim 4 , wherein in the normal drilling mode the return port valve closes the return port and the inner pipe valve opens the outlet of the inner pipe.

6. The dual string pipe of claim 4 , wherein in the high flow mode the return port valve opens the return port and the inner pipe valve closes the outlet of the inner pipe.

7. The dual string pipe of claim 1 , further comprising a packer coupled to at least one of the inner pipe and the outer pipe.

8. The dual string pipe of claim 1 , wherein at least one of the inner pipe and the outer pipe is corrugated.

9. The dual string pipe of claim 1 , wherein the high flow mode is selected from a group consisting of a clean out mode and a cementing mode.

10. A method of selectively directing fluids between a surface location and a downhole location comprising:
placing a dual string pipe in a wellbore,
wherein the dual string pipe comprises an inner pipe located within an outer pipe;

coupling a diverter sub to the dual string pipe,
wherein the diverter sub comprises one or more valves, and

wherein the diverter sub is selectively operable in a normal drilling mode and a high flow mode;
positioning an outer pipe within a casing;
wherein a first annulus is formed between the inner pipe and the outer pipe;
wherein a second annulus is formed between the outer pipe and the casing; and
wherein a packer is coupled to the outer pipe and the packer extends into the second annulus, wherein the packer comprises one or more valves, wherein the one or more valves are operable to fluidically couple the second annulus with at least one of the first annulus and the inner pipe;

selectively controlling the diverter sub when in a closed position to direct a first fluid from the surface location to the downhole location through the inner pipe and the first annulus and when in an open position to direct a second fluid from the downhole location to the surface location through the inner pipe and the first fluid downhole through the first annulus; and
injecting a third fluid into the first fluid by directing the third fluid through the second annulus and the packer.

11. The method of claim 10 , wherein the diverter sub comprises a return port, wherein in the high flow mode the return fluid flows into the inner pipe through the return port.

12. The method of claim 10 , wherein the diverter sub comprises a return port valve, wherein the return port valve selectively opens and closes the return port.

13. The method of claim 10 , wherein the diverter sub comprises an inner pipe valve, wherein the inner pipe valve selectively opens and closes an outlet of the inner pipe.

14. The method of claim 10 , wherein in the normal drilling mode the return port valve closes the return port and the inner pipe valve opens the outlet of the inner pipe.

15. The method of claim 10 , wherein in the high flow mode the return port valve opens the return port and the inner pipe valve closes the outlet of the inner pipe.

16. The method of claim 10 , wherein at least one of the inner pipe and the outer pipe is corrugated.

Assignees

• Strachan Michael John Mcleod
• Halliburton Energy Services Inc

Inventors

• Strachan Michael John Mcleod

Classifications

• E21B33/12

  Packers; Plugs (used for cementing E21B33/134, E21B33/16) · CPC title

• E21B17/18

  Pipes provided with plural fluid passages {(E21B17/203 takes precedence)} · CPC title

• E21B21/103 Primary

  Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus (valves specifically for maintaining circulation of drilling fluid while connecting or disconnecting tubular joints E21B21/019) · CPC title

• E21B21/08

  Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure (valve arrangements therefor E21B21/10) · CPC title

• E21B21/12 Primary

  using drilling pipes with plural fluid passages, e.g. closed circulation systems · CPC title