GB2273512A - Compensation for mud flow indicators - Google Patents

Compensation for mud flow indicators Download PDF

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Publication number
GB2273512A
GB2273512A GB9225997A GB9225997A GB2273512A GB 2273512 A GB2273512 A GB 2273512A GB 9225997 A GB9225997 A GB 9225997A GB 9225997 A GB9225997 A GB 9225997A GB 2273512 A GB2273512 A GB 2273512A
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GB
United Kingdom
Prior art keywords
flow
actual
compensation
well
mud flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9225997A
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GB9225997D0 (en
Inventor
Timothy Peter Blatch
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9225997A priority Critical patent/GB2273512A/en
Publication of GB9225997D0 publication Critical patent/GB9225997D0/en
Publication of GB2273512A publication Critical patent/GB2273512A/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling

Abstract

When drilling from a floating vessel compensation for vessel "heave" is applied to Mud Flow Indicators, thus resulting in a smooth indication of actual well head flow. This is achieved by correcting the Indicator by an amount equal to the "heave". The corrected signal can then be used to detect kicks. <IMAGE>

Description

Compensation for Mud Flow Indicators This refers to Drilling Mud flow, on Drill ships and Semi - submersibles, which are subject to vessel "heave" .
Vessel "heave", is the vertical movement of the vessel, due to external wave forces.
This "heave", influences the Mud flow in the flow line at Rig level,and causes large fluctuations. These fluctuations are also monitored by the flow indicator.
By measuring the rate and amount of vessel "heave", and using this signal to correct the external influence on the flow indicator, then only the actual well head mud flow rate is indicated, and compensation for "heave" is achieved.

Claims (1)

  1. Claims
    1/ Compensation for Vessel "heave" is applied to the readout indication of Mud flow indicators, therefore resulting in actual flow measrement.
    2/ Flow indication on the readout is equivalent to the actual flow, and is therefore smooth and without the fluctuations inherent with uncompensated systems.
    3/ Well Control scenarios can be controlled more quickly and with greater accuracy, as the Mud flow rate indicated is equivalent to actual well bore flow.
    4/ Well "Kicks". and well bore pressure increases can detected more quickly.
    Amendments to the claims have been filed as follows 1/ Compensation for vessel motion, is applied to the readout indication of Mud Flow Indicators, therefore resulting in actual flow measurement.
    2/ Flow indication on the readout is equivalent to the actual flow, and is therefore smooth and without the fluctuations inherent with uncompensated systems.
    3/ Well control scenarios can be controlled more quickly, and with greater accuracy, as the Mud Flow rate indicated is equivalent to actual well bore flow.4 4/ Well "kicks" and well bore pressure increases can be detected more quickly.
GB9225997A 1992-12-12 1992-12-12 Compensation for mud flow indicators Withdrawn GB2273512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9225997A GB2273512A (en) 1992-12-12 1992-12-12 Compensation for mud flow indicators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9225997A GB2273512A (en) 1992-12-12 1992-12-12 Compensation for mud flow indicators

Publications (2)

Publication Number Publication Date
GB9225997D0 GB9225997D0 (en) 1993-02-10
GB2273512A true GB2273512A (en) 1994-06-22

Family

ID=10726549

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9225997A Withdrawn GB2273512A (en) 1992-12-12 1992-12-12 Compensation for mud flow indicators

Country Status (1)

Country Link
GB (1) GB2273512A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976148A (en) * 1975-09-12 1976-08-24 The Offshore Company Method and apparatus for determining onboard a heaving vessel the flow rate of drilling fluid flowing out of a wellhole and into a telescoping marine riser connecting between the wellhouse and the vessel
GB1453203A (en) * 1973-10-04 1976-10-20 Offshore Co Motion compensated blowout and lost circulation detection
GB2106961A (en) * 1981-09-28 1983-04-20 Exxon Production Research Co Controlling the flow of drilling fluid in a wellbore
EP0498128A1 (en) * 1991-02-07 1992-08-12 Sedco Forex Technology Inc. Method for determining fluid influx or loss in drilling from floating rigs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1453203A (en) * 1973-10-04 1976-10-20 Offshore Co Motion compensated blowout and lost circulation detection
US3976148A (en) * 1975-09-12 1976-08-24 The Offshore Company Method and apparatus for determining onboard a heaving vessel the flow rate of drilling fluid flowing out of a wellhole and into a telescoping marine riser connecting between the wellhouse and the vessel
GB2106961A (en) * 1981-09-28 1983-04-20 Exxon Production Research Co Controlling the flow of drilling fluid in a wellbore
EP0498128A1 (en) * 1991-02-07 1992-08-12 Sedco Forex Technology Inc. Method for determining fluid influx or loss in drilling from floating rigs

Also Published As

Publication number Publication date
GB9225997D0 (en) 1993-02-10

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)