Modular pumpouts and flowline architecture

• US 8,899,323 B2
• Filed: 11/28/2011
• Issued: 12/02/2014
• Est. Priority Date: 06/28/2002
• Status: Expired due to Term

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Zazovsky, Alexander F., Milkovisch, Mark
• Primary Examiner(s): Harcourt, Brad
• Application Number:
  US13/304,971
• Publication Number:
  US 20120132419A1
• Time in Patent Office: 1,100 Days
• Field of Search: 166/264, 166/250.14, 166/369, 166/54.1, 166/68, 166/100
• US Class Current: 166/264
• CPC Class Codes: E21B 49/008 by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor measuring pressure E21B47/06
• CPC Class Codes: E21B 49/10 using side-wall fluid samplers or testers

Abstract

Modular pumpouts and flowline architecture are described. An example apparatus includes a downhole tool to sample fluid from a subterranean formation, and a plurality of fluidly coupled pump modules disposed on the downhole tool. Each of the pump modules includes: a pump having a pump inlet and a pump outlet, where the pump inlet is coupled to a first flowline; a first valve assembly having first, second and third ports, wherein the first port is coupled to the first flowline, the second port is coupled to the pump outlet, and the third port is coupled to the first flowline; and a second flowline not fluidly coupled to the first valve assembly or the pump.

Claims

1. An apparatus, comprising:

a downhole tool to sample fluid from a subterranean formation; and

a plurality of fluidly coupled pump modules disposed on the downhole tool, each pump module including;

a pump having a pump inlet and a pump outlet, where the pump inlet is coupled to a first flowline;

a first valve assembly having first, second and third ports, wherein the first port is coupled to the first flowline, the second port is coupled to the pump outlet, and the third port is coupled to the first flowline; and

a second flowline not fluidly coupled to the first valve assembly or the pump;

wherein the each of the first flowlines fluidly couples a first inlet and first outlet of each pump module, each of the second flowlines fluidly couples a second inlet and second outlet of each of the pump modules, and each of the pump outlets is fluidly coupled to a third outlet of each of the pump modules.

2. The apparatus of claim 1 further comprising a fluid routing module fluidly coupled to at least one of the pump modules, the fluid routing module including:

second and third valve assemblies, each having respective first, second and third ports;

first and second fluid inlets; and

first and second fluid outlets, wherein the first ports of the second and third valve assemblies are coupled to the first fluid outlet, the second ports of the second and third valve assemblies are coupled to the second fluid outlet, the third port of the second valve assembly is coupled to the first fluid inlet and the third port of the third valve assembly is coupled to the second fluid inlet.

3. The apparatus of claim 2 wherein the first fluid outlet is coupled to the first flowline of one of the pump modules and the second fluid outlet is coupled to the second flowline of the one of the pump modules.

4. The apparatus of claim 3 wherein the first fluid inlet is coupled to the first flowline of another one of the pump modules and the second fluid inlet is coupled to the second flowline of the other one of the pump modules.

5. The apparatus of claim 1 wherein at least one of the pumps has a different characteristic than another one of the pumps.

6. The apparatus of claim 5 wherein the characteristic is a pump rate or a pressure rating.

7. The apparatus of claim 1 wherein two or more of the pumps are to be operated simultaneously.

8. The apparatus of claim 7 wherein the two or more pumps are to be operated simultaneously to increase a rate at which a volume of fluid is extracted from the formation.

9. The apparatus of claim 7 wherein the two or more pumps are to be operated simultaneously to perform one or more of a cleanup operation, a sampling operation or a fluid analysis operation.

10. An apparatus, comprising:

a pump module to be incorporated in a downhole tool, the pump module comprising;

a pump having a pump inlet and a pump outlet, the pump inlet to be coupled to a first flowline and the pump outlet to be coupled to an outlet to enable the pump to pump fluid into a wellbore;

a valve having first, second and third ports, the first port to be coupled to the first flowline, the second port to be coupled to the outlet and the third port to be coupled to the first flowline, wherein the valve and the pump form at least part of the first flowline; and

a second flowline not fluidly coupled to first flowline;

wherein the first flowline fluidly couples a first inlet of the pump module to a second outlet of the pump module, and wherein the second flowline fluidly couples a second inlet of the pump module to a third outlet of the pump module.

11. The apparatus of claim 10 wherein the pump module is to be coupled to at least one of another pump module or a fluid routing module.

12. A method, comprising:

lowering a tool into a wellbore adjacent a formation;

engaging a probe of the tool to a wall of the wellbore adjacent the formation, the probe having a first fluid inlet and a second fluid inlet, wherein the first fluid inlet is coupled to a first flowline within the tool and the second fluid inlet is coupled to a second flowline;

operating a first pump in a first pump module of the tool;

operating a second pump in a second pump module of the tool, the second pump operating at the same time as the first pump;

drawing fluid from the formation via the first and second pumps during operation of the pumps, wherein the drawn fluid flows through the inlets of the probe into the first and second flowlines and merges into a third flowline, and wherein the fluid drawn through the third flowline by the pumps flows through the first pump module to reach the second pump module and a portion of the drawn fluid exits the first pump and another portion of the drawn fluid exits the second pump; and

routing the drawn fluid via a fluid routing module to the first pump module.

13. The method of claim 12 wherein drawing the fluid from the formation via the first and second pumps during operation of the pumps comprises performing a cleanup operation.

14. The method of claim 13 further comprising performing a fluid analysis of the drawn fluid to identify a completion of the cleanup operation.

15. The method of claim 14 further comprising selectively operating at least one of the pumps to perform a sampling operation following the completion of the cleanup operation.

16. The method of claim 15 wherein selectively operating at least one of the pumps to perform the sampling operation comprises operating the first and second pumps to perform a split flow focused sampling operation or operating one of the first pump or the second pump to perform a co-mingled flow focused sampling operation.

17. The method of claim 12 further comprising routing the drawn fluid via a second fluid routing module to the second pump module.

18. An apparatus, comprising:

a downhole tool to sample fluid from a subterranean formation; and

a plurality of fluidly coupled pump modules disposed on the downhole tool, each pump module including;

a pump having a pump inlet and a pump outlet, where the pump inlet is coupled to a first flowline;

a first valve assembly having first, second and third ports, wherein the first port is coupled to the first flowline, the second port is coupled to the pump outlet, and the third port is coupled to the first flowline;

a second flowline not fluidly coupled to the first valve assembly or the pump; and

a fluid routing module fluidly coupled to at least one of the pump modules, the fluid routing module including;

second and third valve assemblies, each having respective first, second and third ports;

first and second fluid inlets; and

first and second fluid outlets, wherein the first ports of the second and third valve assemblies are coupled to the first fluid outlet, the second ports of the second and third valve assemblies are coupled to the second fluid outlet, the third port of the second valve assembly is coupled to the first fluid inlet and the third port of the third valve assembly is coupled to the second fluid inlet.