Inductively coupled method and apparatus of communicating with wellbore equipment

• US 7,165,618 B2
• Filed: 11/04/2003
• Issued: 01/23/2007
• Est. Priority Date: 11/19/1998
• Status: Expired due to Fees

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Ohmer, Herve, Brockman, Mark W., Malone, David L.
• Primary Examiner(s): KRECK, JOHN J
• Application Number:
  US10/701,325
• Publication Number:
  US 20040094303A1
• Time in Patent Office: 1,176 Days
• Field of Search: 166/244.1, 166/250.01, 166/250.03, 166/373, 166/50, 166/65.1, 166/66, 166/66.5, 166/242.1, 166/242.6, 340/854.8, 340/853.1, 340/856.3, 340/855.1
• US Class Current: 166/313
• CPC Class Codes: E21B 17/003 with electrically conducting or insulating means E21B17/028 and E21B17/023 take precedence
• CPC Class Codes: E21B 17/0283 characterised by the coupling being contactless, e.g. inductive
• CPC Class Codes: E21B 41/0035 Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches
• CPC Class Codes: E21B 41/0042 characterised by sealing the junction between a lateral and a main bore
• CPC Class Codes: E21B 47/12 Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• CPC Class Codes: E21B 47/13 by electromagnetic energy, e.g. radio frequency

Abstract

A method and apparatus that allows communications of electrical power and signaling from downhole component to another downhole component employs an inductive coupler assembly. In one arrangement, one portion of the inductive coupler assembly is attached to a production tubing section and the other portion of the inductive coupler assembly is attached to a casing or other liner section. The production tubing inductive coupler portion is electrically connected to a cable over which electrical power and signals may be transmitted. Such power and signals are magnetically coupled to the inductive coupler portion in the casing or liner section and communicated to various electrical devices mounted outside the casing or liner section. In other arrangements, inductive coupler assemblies may be used to couple electrical power and signals from the main bore to components in lateral branches of a multilateral well.

Claims

1. Apparatus to communicate electrical signaling from a main bore of a well to equipment in a lateral branch, comprising:

a connector mechanism adapted to connect equipment in the main bore to equipment in the lateral branch;

a first inductive coupler portion attached to the connector mechanism to communicate electrical signaling with the lateral branch equipment; and

a tubing having a lower portion, the lower portion of the tubing having a second inductive coupler portion,

wherein the connector mechanism has a third inductive coupler portion and a receptacle to receive the lower portion of the tubing to position the second inductive coupler portion next to the third inductive coupler portion.

2. The apparatus of claim 1, further comprising a module to engage an internal profile of the connector mechanism, the module having a fourth inductive coupler portion that is positioned next to the first inductive coupler portion when the module is engaged to the internal profile of the connector mechanism.

3. The apparatus of claim 2, wherein the module comprises one of a sensor module and a control module.

4. A method of communicating between main bore equipment and lateral branch equipment in a well, comprising:

providing a first inductive coupler assembly electrically connected to the main bore equipment and in communication with the lateral branch equipment;

transmitting electrical signaling over an electrical cable connected to the first inductive coupler assembly;

providing a second inductive coupler assembly electrically connected to the lateral branch equipment;

electrically connecting the second inductive coupler assembly to the first inductive coupler assembly; and

providing a connector to connect the main bore equipment to the lateral branch equipment, wherein the connector has a receptacle to receive the main bore equipment, the connector having a portion of the first inductive coupler assembly,

wherein the main bore equipment includes a tubing having a lower portion to engage in the receptacle of the connector, the lower portion of the tubing having another portion of the first inductive coupler assembly.

5. The method of claim 4, further comprising providing a module into the connector, the module having a portion of the second inductive coupler assembly, and the connector having another portion of the second inductive coupler assembly.