Automatic pump chamber control adjustment

Inactive Publication Date: 2014-09-18
HYDRIL USA MANUFACTURING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a method and system for lifting drilling mud from underground to a drilling vessel. The system includes a subsea pump with a bladder that separates mud and water. The mud is directed into the pump and pushed out through a water valve using pressurized water. The bladder prevents water from contaminating the mud as it moves back and forth in the pump. This technology ensures the efficient and safe lifting of drilling mud from subsea to a drilling vessel.

Problems solved by technology

However, as well control depends at least in part on the column of fluid in the riser, the effects of corrective action in response to a well kick or other anomaly can be delayed.

Method used

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  • Automatic pump chamber control adjustment
  • Automatic pump chamber control adjustment
  • Automatic pump chamber control adjustment

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Embodiment Construction

[0013]The method and system of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings in which embodiments are shown. The method and system of the present disclosure may be 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 fully convey its scope to those skilled in the art. Like numbers refer to like elements throughout.

[0014]It is to be further understood that the scope of the present disclosure is not limited to the exact details of construction, operation, exact materials, or embodiments shown and described, as modifications and equivalents will be apparent to one skilled in the art. In the drawings and specification, there have been disclosed illustrative embodiments and, although specific terms are employed, they are used in a generic and descriptive sense onl...

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Abstract

A method and system for lifting drilling mud from subsea to a drilling vessel, which uses a pump having a body with a chamber, and a bladder in the chamber. The bladder attaches to the body and defines water and mud sides in the chamber. A mud inlet valve allows mud into the mud side of the chamber; which moves the bladder into the water side and urges water in the water side from the chamber and through a water exit valve. Pressurized water enters the chamber through a water inlet valve, which in turn pushes the bladder and mud from the chamber through a mud exit valve. The bladder separates the mud and water as it reciprocates in the chamber. The travel of the bladder in the chamber is controlled to prevent damage from contact with the chamber.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and the benefit of co-pending U.S. Provisional Application Ser. No. 61 / 791,258, filed Mar. 15, 2013, the full disclosure of which is hereby incorporated by reference herein for all purposes.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]The present disclosure relates in general to a system and method for maintaining volume in a bladder pump at the end of each pump stroke.[0004]2. Description of Prior Art[0005]Subsea drilling systems typically employ a vessel at the sea surface, a riser connecting the vessel with a wellhead housing on the seafloor, and a drill string. A drill bit is attached on a lower end of the drill string, and used for excavating a borehole through the formation below the seafloor. The drill string is suspended subsea from the vessel into the riser, and is protected from seawater while inside of the riser. Past the lower end of the riser, the drill string inserts through...

Claims

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Application Information

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IPC IPC(8): E21B21/00
CPCE21B21/001F04B19/003F04B43/073F04B49/065
InventorDUMAN, AHMETNGUYEN, DAT MANHDANIEL, DEVON
OwnerHYDRIL USA MANUFACTURING LLC