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System and method for dissolved gas detection

a detection system and a technology for dissolved gas, applied in the field of oil and gas drilling operations, can solve problems such as potential hazards

Inactive Publication Date: 2021-09-30
HYDRIL USA DISTRIBUTION LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a system and method for monitoring and controlling drilling operations in real-time at a subsea location. The system includes a blowout preventer, a riser, a dissolved gas detection and mitigation system, and a control system. The system can detect the bubbles in the drilling mud and adjust the pressure to prevent bubble formation. The technical effect of this patent is to improve the stability and safety of drilling operations at subsea locations and to prevent accidents that might occur due to bubble formation.

Problems solved by technology

At certain pressures, the dissolved gases may be liberated from the mud, for example when the pressure is reduced, which may cause disturbances.
These situations are undesirable and create potentially hazardous scenarios.

Method used

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  • System and method for dissolved gas detection
  • System and method for dissolved gas detection
  • System and method for dissolved gas detection

Examples

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Embodiment Construction

[0015]The foregoing aspects, features, and advantages of the present disclosure will be further appreciated when considered with reference to the following description of embodiments and accompanying drawings. In describing the embodiments of the disclosure illustrated in the appended drawings, specific terminology will be used for the sake of clarity. However, the disclosure is not intended to be limited to the specific terms used, and it is to be understood that each specific term includes equivalents that operate in a similar manner to accomplish a similar purpose.

[0016]When introducing elements of various embodiments of the present disclosure, the articles “a”, “an”, “the”, and “said” are intended to mean that there are one or more of the elements. The terms “comprising”, “including”, and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Any examples of operating parameters and / or environmental conditions are not...

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Abstract

A subsea mud evaluation system includes a blowout preventer (BOP), coupled to a wellbore formed in an underground formation, the blowout preventer being positioned proximate a sea floor. The system also includes a riser fluidly coupled to the BOP, the riser extending from the BOP to a sea surface location to transport drilling mud between the wellbore and the sea surface location. The system further includes a dissolved gas detection and mitigation systems (DMS), fluidly coupled to at least one of the BOP or the riser, the DMS receiving a quantity of drilling mud and determining a subsea bubble point of the quantity of drilling mud, corresponding to a pressure where a dissolved gas within the drilling mud is liberated.

Description

BACKGROUND1. Field of the Invention[0001]The present disclosure relates to oil and gas drilling operations, and more specifically, to monitoring downhole operations to detect potential disturbances.2. Description of Related Art[0002]During oil and gas exploration operations, a wellbore may be drilled into a formation through a potential hydrocarbon-bearing region. Drilling mud is utilized to cool a drill bit that drills the formation, to carry cuttings from the bottom of the borehole to a surface location, and to supply hydrostatic pressure to regulate downhole pressures. When in contact with the formation and / or region, gas may enter the drilling mud and under high pressures the gas may dissolve in the mud. At certain pressures, the dissolved gases may be liberated from the mud, for example when the pressure is reduced, which may cause disturbances. For example, the dissolved gases may expand and drive mud out of the wellbore and / or a drilling riser, which drops the pressure of the...

Claims

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Application Information

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IPC IPC(8): E21B21/08E21B21/00E21B33/064
CPCE21B21/08E21B21/001E21B33/064E21B21/003E21B47/10E21B47/001
Inventor DUNN, GREGORY M.
Owner HYDRIL USA DISTRIBUTION LLC