US3698003A - Recorder alarm system - Google Patents

Recorder alarm system Download PDF

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Publication number
US3698003A
US3698003A US76141A US3698003DA US3698003A US 3698003 A US3698003 A US 3698003A US 76141 A US76141 A US 76141A US 3698003D A US3698003D A US 3698003DA US 3698003 A US3698003 A US 3698003A
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US
United States
Prior art keywords
light
light source
set point
arm
alarm
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.)
Expired - Lifetime
Application number
US76141A
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English (en)
Inventor
Martin J Sharki
Charles J Mazoch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWACO GEOLOGRAPH Co
Original Assignee
Dresser Industries Inc
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 Dresser Industries Inc filed Critical Dresser Industries Inc
Application granted granted Critical
Publication of US3698003A publication Critical patent/US3698003A/en
Assigned to SWACO GEOLOGRAPH COMPANY reassignment SWACO GEOLOGRAPH COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DRESSER INDUSTRIES, INC., A CORP. OF DE
Assigned to SWACO GEOLOGRAPH COMPANY reassignment SWACO GEOLOGRAPH COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DRESSER INDUSTRIES, INC., A DE CORP.
Anticipated expiration legal-status Critical
Assigned to DRESSER INDUSTRIES, INC., A CORP. OF DE reassignment DRESSER INDUSTRIES, INC., A CORP. OF DE ASSIGNS THE ENTIRE INTEREST, EFFECTIVE NOVEMBER 1, 1989. Assignors: SWACO GEOLOGRAPH COMPANY
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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

Definitions

  • Monitoring of various drilling parameters is desirable during the drilling of oil and gas wells. Examples of the various parameters that need to be monitored are mud pit volume, mud weight and percentage mud flow at the flow line.
  • the system In addition to monitoring the drilling parameters, it is desirable for the system to include an alarm that will be actuated when any of the drilling parameters exceed or fall below preset limits.
  • the set points for these limits should be easily adjustable and not require dismantling of the system. Adjustment of the set points is preferably made from the front of the alarm recorder.
  • the system should be easily adjustable and provide a' high degree of precision in adjustment of the set points. Because of the difficulties encountered with purely mechanical adjustments, it is desirable to include adjustment other than purely mechanical. The operation of the system should be uniform throughout varying environmental conditions.
  • the present invention provides an alarm system for a recorder in which one or more set points for the alarm are easily re-set by an operator and which may be brought into accurate calibration with the recording arm by varying the intensity of a light source mounted on the movable pen arm.
  • the set point arms may be adjusted from the front of the instrument.
  • the intensity of the light source mounted on the pen arm is adjustable from the front of the instrument.
  • the temperature of photovoltaic cells mounted on the set point arms is maintained constant.
  • the alarm set points may be coordinated with the pen arm calibration by moving the pen arm to coincide with any given set point position and varying the intensity of the light source until the portion of its beam which reaches the photovoltaic cell at that position is just enough to activate said cell sufficiently to cause the relay to operate.
  • FIG. 1 illustrates a recorder alarm system constructed in accordance with the present invention.
  • FIG. 2 is an electrical circuit diagram of the recorder alarm system shown in FIG. 1.
  • FIG. 1 a single pen recorder alarm system is shown. It is to be understood that the present invention may be embodied in a recording system utilizing a multiplicity of pen arms used for recording various parameters; however, the single pen arm system is shown for simplicity in illustration.
  • a movable roll of recording paper 10 is positioned on a base 11.
  • the roller holding paper 10 is rotatably mounted by having its end portions positioned in receiving bearings 12 and 13.
  • the roller is driven by a suitable motor (not shown).
  • a recording pen arm 13 includes a marking device 14 at one end.
  • the marker 14 contacts paper 10 and as the paper is drawn past marker 14, a record of the parameter to be recorded is obtained.
  • the position of pen arm 13 is controlled by a conventional recording element 15 that receives the incoming signal to be recorded. It can be appreciated that the incoming signal controls the position of pen arm 13 thereby locating marker 14 relative to the scale on paper 10.
  • adjustable set point arms 16 and 17 are provided.
  • the set point arms extend to the front of the instrument and may be positioned at any desired location relative to the scale on paper 10.
  • a pair of photovoltaic cells 18 and 19 are attached to set point arms 16 and 17 respectively. Movement of set point arms 16 and 17 governs the position of photovoltaic cells 18 and 19.
  • a pair of light bulbs 20 and 21 are positioned on pen arm 13. When pen arm 13 has moved to a point that coincided with one of the set points, the light from one of the bulbs will strike the corresponding photovoltaic cell. For example, assume that set point arm 16 denotes the high set point. When pen arm 13 coincides with this set point, light from bulb 20 will strike photovoltaic cell 18. The photovoltaic cell 18 actuates an alarm 22.
  • the output of photovoltaic cells generally varies with temperature.
  • heaters 23 and 24 are mounted on photovoltaic cells 18 and 19 respectively.
  • a thermistor 25 measures the temperature near one of the photovoltaic cells and supplies a signal representing temperature to a variable power supply 26.
  • the variable power supply 26 supplies an amount of power to heaters 23 and 24 to maintain the temperature of photovoltaic cells 18 and 19 constant.
  • the intensity of light from bulbs 20 and 21 may be varied.
  • Potentiometers 27 and 28 allow the electric current from power source 29A or 29B respectively, to be varied thereby controlling the intensity of the light source. This allows the alarm set point systemto be coordinated into calibration according to the method of the present invention.
  • FIG. 2 an electrical diagram of the alarm system of FIG. 1 is shown.
  • Light from a source 20 mounted on the pen arm passes through an aperture 33 and strikes the photovoltaic cell 18 as the pen arm nearly coincides with the set point arm, with the maximum total light striking the sensitive area of the cell when the light source, aperture, and cell are exactly aligned.
  • a potentiometer 27 allows the intensity of light source 20 to be adjusted by varying the amount of power from power source 29A.
  • light from source 21 will strike photovoltaic cell 19 when the pen arm and set point arm for that photovoltaic cell coincide.
  • the intensity of source 21 may be varied by adjustment of potentiometer 28.
  • the light source is shown mounted on the pen arm, it can be appreciated that the light source could be mounted on the set point arms and the light sensitive elements mounted on the pen arm.
  • the very low voltage output requirement provides excellent voltage stability in spite of temperature changes in the cell. Further temperature stability is provided by a means such as the constant temperature circuit in which a thermistor 25 senses the temperature near the photovoltaic cells and causes the constant temperature controller 26 to adjust the power to the heaters 23 and 24. The temperature at the thermistor is properly kept slightly above the highest anticipated normal ambient temperature.
  • the following method of adjustment is used to coordinate the sensitivity of the set points to the calibration of the pen arm of the recorder shown in FIGS. 1 and 2.
  • Photovoltaic cells are known to change sensitivity with time and to differ one from another, and periodic set point calibration may be necessary. In addition, it may be necessary to replace various elements in the set point system and adjustment will then be required again.
  • the pen arm 13 is positioned near the midpoint of the scale on paper by adjusting the input signal to the recorder.
  • Set point arm 17 which is used as a high set point indicator is positioned to coincide with pen arm 13.
  • Potentiometer 28 is adjusted to reduce the intensity of light source 21 until the light energy which reaches cell 19 through aperture 34 is low enough that the alarm circuit is not activated and then adjusted the opposite direction just enough to again activate the alarm.
  • set point arm 16 is then moved to the desired high set point position.
  • set point arm 16 is moved to coincide with the pen arm 13, and potentiometer 27 is adjusted to decrease the light energy from source 20 on photovoltaic cell 18 until the alarm is inactivated and then to increase it until the alarm is just activated.
  • Set point arm 16 is then moved to the desired low set point position.
  • the signal input to the recorder may then be varied to move the pen arm down to the low set point and then up to the high set point and the accuracy of the adjustment is confirmed by operation of the alarms.
  • a recorder alarm system comprising:
  • an elongated pen arm having a marking end; means for moving a recording material past said marking end;
  • a light sensitive element positioned on said set point arm for receiving light from said light source when the light source is positioned proximate said light sensitive element
  • the recorder alarm system of claim 1 including a second elongated set point arm, means for moving said set point arm and a light sensitive element positioned on said set point arm for receiving light from said light source when the light source is positioned proximate the light sensitive element on said second elongated set point arm.
  • the recorder alarm system of claim 2 including means for maintaining the light sensitive elements at a constant temperature.
  • an alarm system comprising:
  • the alarm system of claim 4 including means for maintaining the light sensitive elements at a constant temperature.
  • an alarm system comprising: a light sensitive element mounted on said pen arm, one or more elongated set point arms, means for moving said set point arms, light sources positioned on said set point arms, means for controlling the intensity of said light sources and an alarm that is actuated when sufficient light from said light source strikes said light sensitive element.
  • the alarm system of claim 5 including means for maintaining the light sensitive element at a constant temperature.
  • a method of adjusting a recorder alarm system having a light source on a pen arm and movable light sensitive elements electrically connected to an alarm comprising:
  • a method of adjusting a recorder alarm system having a light source on a pen arm, movable light sensitive elements on set point arms that will be actuated when the pen arm with the light source moves proximate one of said light sensitive elements and an alarm that is energized when one of said light sensitive elements are actuated, comprising: adjusting the intensity of the light source mounted on the pen arm so that when the pen arm and a set point arm are coincident, the portion of the light striking the light sensitive element is just enough to cause a response from the element sufficient to energize the alarm and provide an alarm signal.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Recording Measured Values (AREA)
  • Length Measuring Devices By Optical Means (AREA)
US76141A 1970-09-28 1970-09-28 Recorder alarm system Expired - Lifetime US3698003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7614170A 1970-09-28 1970-09-28

Publications (1)

Publication Number Publication Date
US3698003A true US3698003A (en) 1972-10-10

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ID=22130166

Family Applications (1)

Application Number Title Priority Date Filing Date
US76141A Expired - Lifetime US3698003A (en) 1970-09-28 1970-09-28 Recorder alarm system

Country Status (5)

Country Link
US (1) US3698003A (enExample)
CA (1) CA1023827A (enExample)
DE (1) DE2145536A1 (enExample)
FR (1) FR2108451A5 (enExample)
NL (1) NL7112547A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3535100A1 (de) * 1985-10-02 1987-04-23 Hiss Eckart Multifunktionssensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349245A (en) * 1965-08-24 1967-10-24 American Gage & Mach Control construction to maintain a range of variables using light conducting rod

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349245A (en) * 1965-08-24 1967-10-24 American Gage & Mach Control construction to maintain a range of variables using light conducting rod

Also Published As

Publication number Publication date
DE2145536A1 (de) 1972-03-30
NL7112547A (enExample) 1972-03-30
FR2108451A5 (enExample) 1972-05-19
CA1023827A (en) 1978-01-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SWACO GEOLOGRAPH COMPANY,TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DRESSER INDUSTRIES, INC., A CORP. OF DE;REEL/FRAME:004771/0806

Effective date: 19870831

Owner name: SWACO GEOLOGRAPH COMPANY, HOUSTON, TX A CORP. OF T

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE DATE OF DOCUMENT 9-01-87;ASSIGNOR:DRESSER INDUSTRIES, INC., A CORP. OF DE;REEL/FRAME:004771/0806

Effective date: 19870831

AS Assignment

Owner name: SWACO GEOLOGRAPH COMPANY,TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DRESSER INDUSTRIES, INC., A DE CORP.;REEL/FRAME:004806/0540

Effective date: 19871111

Owner name: SWACO GEOLOGRAPH COMPANY, HOUSTON, TEXAS, A TX GEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE SEPT 1, 1987, SUBJECT TO LICENSE RECITED.;ASSIGNOR:DRESSER INDUSTRIES, INC., A DE CORP.;REEL/FRAME:004806/0540

Effective date: 19871111

AS Assignment

Owner name: DRESSER INDUSTRIES, INC., A CORP. OF DE, TEXAS

Free format text: ASSIGNS THE ENTIRE INTEREST, EFFECTIVE NOVEMBER 1, 1989.;ASSIGNOR:SWACO GEOLOGRAPH COMPANY;REEL/FRAME:005270/0607

Effective date: 19891101