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System and method for inductive signal and power transferred from ROV to in riser tools

A riser and AC signal technology, applied in earthwork drilling, wellbore/well components, construction, etc., can solve problems such as the inherent risk of damage to the umbilical cable and BOP obstacles on the water surface

Inactive Publication Date: 2012-07-11
VETCO GRAY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This arrangement presents a barrier to the use of surface BOPs for subsea completions because the cross-bracing joints must be positioned at the surface, resulting in the umbilical having to accommodate variable heights depending on water depth
In general, when used within a subsea drilling riser, there is also an inherent risk of damage to the umbilical during run-in and operation

Method used

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  • System and method for inductive signal and power transferred from ROV to in riser tools
  • System and method for inductive signal and power transferred from ROV to in riser tools

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Embodiment Construction

[0009] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the illustrated embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will complete to those skilled in the art. Inform the scope of the present invention. Herein, like numbers refer to like elements.

[0010] refer to figure 1 A subsea well assembly is depicted, with a wellhead 11 schematically shown located at the seabed 13 . The wellhead 11 may be a wellhead housing, a tubing hanger spool, or a Christmas tree type that internally supports a tubing hanger. An adapter 15 connects the wellhead 11 to a subsea blowout preventer (BOP) 18 , typically with a set of pipe rams 17 . The tubing ram 17 seals around tubing of the specified si...

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Abstract

The tile of the invention is system and method for inductive signal and power transferred from ROV to in riser tools. A subsea wellhead assembly has a completion landing string inside a drilling riser and includes a power source for generating an alternating electrical current and a connector for connecting the power source to a receptacle in the subsea well assembly. The assembly also includes a first inductor electrically connected to the power source through the connector; a subsea control module delivering power and control signals to the subsea well assembly; and a second inductor spaced from the first inductor, and located in the subsea control module, the second inductor positioned so that an EMF is produced on the second inductor when the alternating electrical current is passed through the first inductor to thereby generate an alternating current signal on the second inductor.

Description

technical field [0001] The present invention relates generally to offshore drilling and, in particular, to apparatus and methods for providing electrical communication between surface drilling platforms or ROVs using umbilicals. Background technique [0002] Control of subsea equipment is typically accomplished via umbilicals through surface-mounted control stations. Umbilicals typically carry hydraulic energy and may contain electrical power, as well as communications for control and monitoring of equipment in the well or above. In completing a subsea well for subsea production, a riser is extended from the surface vessel and attached to the subsea well. The tubing hanger is lowered through the riser onto the tubing (often referred to as a landed string) and sits in the tubing spool or wellhead assembly. A tubing hanger running tool connected to the upper end of the tubing hanger provides a sealing and locking member for the landing of the tubing hanger in the wellhead or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/035E21B23/08
CPCE21B33/0355E21B33/0385E21B33/035E21B47/13
Inventor S·P·芬顿
Owner VETCO GRAY
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