DE2264348A1 - PNEUMATIC PULSE SIZE MEASURING AND COUNTING DEVICE - Google Patents

Description

MC-71-2

Dresser Industries, Inc., Republic National Bank Building Dallas, Texas 75 221 / USA

Pneumatic pulse size measuring and counting device

The invention relates to a pulse size measuring device for monitoring the size of pulses in a compressed air line and it relates in particular to a pneumatic counting device for monitoring the strokes of a pump,

The subject of the invention is to measure the total number of pulses and the instantaneous magnitude or frequency These pulses are directed, with particular flow components being used to generate pulses that control the pump strokes in the case of oil or gas drilling rigs and determine the total number of such pulses and their size, to count

It is known when drilling oil * and gas wells the total number of recurring events, such as the revolutions of a drill pipe, the depth increments of the drill pipe, the number of strokes of a mud pump or the like. To measure. It is also recognized that it is desirable to have the instantaneous To know the magnitude with which such variables occur.

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For example, U.S. Patent No. 3,518,552 refers to a electronic system for measuring and recording the depth and penetration speed of a drill head. It is however, it should be noted that it does so under certain conditions It is highly desirable to use a pneumatic system instead of an electrical system for bores Use to reduce or eliminate the possibility of an explosion. There were also pneumatic ones Counting and large measuring devices proposed (US-PS 3 34-8 231) » however, known devices of this type are very complex and expensive, and they do not have those of the interested parties desired accuracy delivered

The invention is based on the object of providing a device for counting the movement, for example one when lowering Holes used machine to create appropriate impulses, which also result from the movement of this-r machine The size or frequency of the resulting impulses is measured and the pneumatic one measures the total number of the impulses with increased accuracy detects recurring impulses and their current size when they occur

According to the invention, this task is expressed in a few words - Solved by a device that causes air in a time or clock measuring container with a predetermined fixed pressure is stored, the air pressure of this container being transmitted to one reading device at a time which corresponds to the occurrence of another pulse. This is the height of the transferred to the reading device The pressure is proportional to the instantaneous magnitude when these pulses occur.

According to the invention there is provided a monostable transducer valve which generates a mechanical force from movement e.g. a pump rod and works to make one

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monostable air tank from a regulated air supply device pressurized here »When the pump rod returns to its original position, the monostable air reservoir is emptied into a logic flow circuit, which brings a counter to work and the air signal to a size measuring transfer valve and a monostable Accumulator valve supplies. This valve stores the air pressure in a second monostable air tank, and Timing vessel receives pressurized air of constant and predetermined level from a flow meter via the size measuring transfer valve. When the transfer valve is energized, the pressure in the timing vessel is reduced by a Transfer auxiliary relay or valve to a reading device. Since the signals from the counter are coupled to the size measuring device are, the second monostable air tank to a pilot discharge valve and a discharge valve is free to the To empty the timing container. In the time between emptying the timing container and transferring it to the reading device, a pressure of a fixed level determined by the flow meter is built up in the time measuring container. The time between pulses is then represented by a pressure build-up in the timing container. According to a modified one Embodiment, the flow meter is replaced by a motor that has a counting or time disc with one through this extending hole so that the air is forced to flow alternately through two air shut-off devices, which have the effect that an air volume container is under pressure be set and emptied, in proportion with the rotation of the disc. Built on the principle that if a given volume of air at a given pressure expands into a second volume during a time cycle, the resulting Pressure at any time is a measure of the time from the first cycle to the time of measurement, the pressure is in the timing container thus at any time proportional to the size or frequency of the pulses, which from the monostable Transducer valve or the mechanical force that makes this valve work «

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Further features and advantages essential to the invention emerge for the person skilled in the art from the following description of exemplary embodiments of the subject matter of the invention.

Fig. 1 is a schematic representation of the counting circuit according to the invention.

Fig. 2 shows schematically the pulse size measuring circuit according to the invention.

Fig. 3 shows schematically a modified embodiment part of the pulse size measuring circuit of FIG.

The counting circuit according to FIG. 1 contains a regulated air supply 10 with an outlet air line 11 which is connected to a low pressure air regulator 12, the outlet of which is monitored by the air pressure meter 13. The air line 11 is also connected to the input 14 of a step-by-step operation "Monostable" transducer valve 15 connected, which is a spring-loaded Is two-way valve and is connected to the reciprocating pump rod 16 of the pump 17, which for example, a mud pump of an oil derrick (not shown) * The one-shot transducer valve is in usually trained; For example, it can be the microswitch available from Honeywell Corporation, Freeport / Ill No. 64 NFl. With another input 18 of the transducer valve 15, an air tank 19 is connected, which as a monostable Air reservoir is referred to. At the outlet opening of the measuring transducer valve 15 closes a long pipe 21 of for example 60 m in length to which a conventional drain valve is connected.

The output of the air pressure meter 13 leads via an air line 23 to a branch point 24, which has two pneumatic NOR gates (NOT / OR gates) 25,26 is connected. These NOR gates are of the usual design; it can be, for example, turbulence enhancers such as those from the Fluidic Division

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from Howie Corporation, Norristown (Penn.). The feed line 27 leads from the branching point 24 to the NOR gate 25, while the feed line 28 leads to the NOR gate 26. The collector pipe 29 of the gate 25 is on the control nozzle 30 of the gate 26 connected, while the control nozzle 31 cles gate 25 with the pipeline 21 of the monostable measuring transducer valve 15 is in connection. The collector tube 32 of the gate 26 is via the air line connected to the solenoid of the pneumatic amplifier "34-. This booster 34- is a common spring loaded booster valve, e.g., Model No. 5 BV 011 available from Norgren Fluidics Company, Littleton (Colorado). Inlet 36 of the Booster valve 34- is through the air line 11 with the regulated air supply device 10 connected. The air line 38 leads from the outlet of the valve 34 to an outlet connection 39 and to a conventional pneumatic counter 40, which counts the number of flow pulses occurring in the air line 8.

During operation of the pneumatic circuit according to FIG. 1, the movement of the pump rod 16 causes the monostable container Compressed air is received from the regulated air supply device through inlet 14 of valve 15. When the pump rod is in its initial position goes back, so air flows from the monostable container 19 through the pipe 21 to the control nozzle 31 of the NOR gate 25. Since this gate is a turbulence intensifier, it interrupts the air flow from the feed line 27 to the collector pipe 29, and thus no exit occurs in the collector pipe 29. The lack of air in the pipe between the collector pipe 29 and the control nozzle 30 of the NOR gate 26 causes a quantity of air to flow from the feed line to the collector tube 32 in the NOR gate 26, wherein this amount of air is determined by the Naflierdruck air regulator 12. This pulse of air is then fed via line 35 to the booster valve 34 to control its solenoid 33. This has the effect that air from the regulated air supply

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device 10 flows from inlet 36 to outlet 37 of booster valve 37 and as an air pulse in air line 38, of output connection 39 and occurs at counter 40. For example, as shown at counter 40, the Pump performed 2345 back and forth strokes.

The output connection 39 is connected according to FIG. 2 to a solenoid of the monostable storage valve 42, one of which Input 43 via the air line 44 with the regulated air supply device 10 is connected. Another opening 45 of the valve 42 has a connection with a monostable Air reservoir 46. The outlet 47 of the valve 42 is connected to the Solenoids 48 connected to a Vorvoruhr drain valve 49. The air line connecting outlet 47 and solenoid 48

50 has a regulated, slow-acting drain valve

51 provided. The inlet port 52 of the pilot relief valve is with the air line 44, the outlet 53 of this valve is with the solenoid 54 of the drain valve 55 in connection. Another outlet 56 of valve 49 is used for drainage purposes into the open,

The connection point 39 is also on via the air line 57 connected to the solenoids 58 of the transfer valve 59, the opening 60 of which is connected to the cycle or time measuring container 61, which is also connected to the drain valve 55 »and although it is connected to its inlet 62. The outlet opening of the valve 55 leads to the emptying of the timing container 61 into the open. The inlet opening 64 is connected to the outlet of the flow meter 65. This and the regulated air supply device 10 are arranged in an area 66 enclosed by dashed lines. The exit opening 67 of the transmission valve 59 is connected to an auxiliary relay 68, which is also connected to the regulated air supply device 10 is connected via the air line 69. The output of the auxiliary relay 68 is connected to a pneumatic reading device 70 in connection «

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The valves 42, 55 and 59 are of the usual type; you can. Model No. 516 F 2-178 In-VaI-Co available from Microvalve Company, Tulsa, Oklahoma. The pilot control «drain valve 49 is also of conventional design, for. B. Model No. 5 BV 011 available from Norgren Fluidics of Littleton, Colorado. The auxiliary relay is also a common model, eg No. GC 68 A from Moore Products Company, Springhouse (Penn) _e

When the circuit according to FIG. 2 is operated, an air pulse occurring at connection point 39 causes actuation of the solenoid 41 of the valve 42. As a result, the monostable air tank 46 receives air from the air via the inlet 43 Regulated air supply device 10, At the end of the pulse at junction 39, the spring-loaded valve 42 reverses

im back to its original position, and the V monostable Air stored in the reservoir 46 flows through the outlet to the solenoid 48 of the pilot relief valve 49. Thereby air flow from the regulated air supply device 10 through the inlet port 52 of the pilot relief valve 49 is established to the solenoid 54 of the drain valve 55 causes. At the end of the pulse from the monostable air tank 46, the air flows in line 50 then via the regulated drain valve 51, and the solenoid 48 of the pilot relief valve 49 returns to its original position. The one at junction 39 Any air pulse occurring is also transmitted to the solenoid 58 of the transfer valve 59 supplied. Before actuation of the solenoid, the flow meter 65, which is of the usual type and Provides air pulses of a predetermined frequency, connected to the timing container 61. At the moment when the impulse of the junction 39 occurs on the solenoid 58, the air pressure stored in the timing container 61 then becomes Outlet opening 67 of the transfer valve 59 and through the Auxiliary relay 68 transferred to reading device 70, the same, The pulse occurring at the junction 39 then sets the monostable air reservoir 46, the pilot control drain valve 49 and the drain valve 55 in operation, the latter then causing

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that the timing container 61 through the outlet opening 63 the drain valve 55 blows off into the open. It follows from this that in the time between emptying the measuring container 61 and its transfer to the reading device 70 of the measuring container 61 a pressure with one through the flow meter 65 builds up a predetermined fixed size. The time between the pulses is then reduced by a pressure build-up in the Timing vessel 61 reproduced · Thus the pressure in timing vessel 61 at any given time is the

monoFrequency of the impulses proportional, generated by thevstable Sensor valve 15 or the mechanical force or work of the reciprocating pump rod 16 that controls valve 15 operates, are generated.

FIG. 3 shows a modified embodiment for the area 66 of FIG. 2 enclosed by dashed lines, the is designated here with 66 *. The regulated air supply device 10 is connected to a compressed air motor 81 via the air line 80 a Welk 82 to which a turntable 83 is attached, tied together. A hole 84 extends through it near the outer circumference of the disk 83. Two air shut-off devices 85 »86 are on opposite sides of the disc 83 »e.g. with a Distance of 180 °, arranged. Each of these air shut-off devices lies on the outer circumference of the disk 83 in such a way that only then air can pass through any shut-off device if the hole 84- through the respective shut-off element passes through it. The input 87 of the shut-off device 85 and the input 88 of the shut-off device 86 are both connected to the air line 80. The output 89 of the shut-off element 85 is connected to the solenoids 90 of the switching valve 91, the Output 92 of the shut-off element 86 is connected to the solenoids 93 of the Control valve 94- connected. The inlet port 95 of the Switching valve 91 is in communication with the air line 80, while the outlet port 96 of the same valve 91 is connected to the Air volume container 97 is connected, which is also connected to the Inlet opening 98 of switching valve 94- is in connection »

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One closes at the outlet opening 99 of the switching valve 94 Output connection 100 which is connected to the inlet port 64 of the transfer valve 59 (Figure 2). The air duct 80 is also connected to an output connection 101 which is connected to the auxiliary relay 68 (Figure 2) is. The air shut-off devices 85, 86 are of the usual type; you can z. B. Model No. 4 JS-020-D00 from Norgren-Fluidics, Littleton (Colorado), the switching valves 91, 94 are also of the usual type and can be, for example, as Model No. 5 BV 011 can be obtained from the same company.

In operation of the device according to FIG. 3, the compressed air motor 81 rotates at a constant speed by the action of the regulated air supply device. This ensures that the hole 84 in the disk 83 always actuates the air shut-off element 85 when it passes through this element. Whenever this occurs, the solenoid 90 causes the switching valve 91 to be actuated, causing the air volume container 97 to be pressurized from the regulated air supply device 10. Since the disk 83 rotates, the air shut-off element 86 is actuated, which in turn actuates the switching valve 94, whereby the air volume container 97 is emptied via the output connection 100 in the timing container 61 (FIG. 2). It follows that so that a digital filling the Zeitmeßbehälters (Fig.2) is obtained · Since the speed of the motor is kept constant 81, causing the repeated transfer of air from the air volume container 97 in the Z _e itmeßbehälter 61, that the pressure in this Container 61 increases to a certain extent.

In the preceding description and in the drawings, reference is made to a preferred embodiment of the subject matter of the invention Referenced. The person skilled in the art will be able to make changes to the embodiment described to undertake. For example, if a circuit has been described and illustrated to determine the number and frequency of To count air pulses that result from the movement of back and forth

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walking rods, such as pumps or the like. Machines assigned to stir, so it is clear that if so desired is the output directly from the monostable transducer valve 15 to the connection point 39 can v / ground if the pressures are sufficient for the purposes to be achieved. It is It is also clear that the output size indicator on the reading device 70 can be configured with a number of variables such as depth, penetration rate or the like, when used in oil or gas wells, combined or related thereto can be set. If, for example, the display device 70 is a continuously operating recorder that depending on the drilling depth, it is very easy to add strokes of the mud pump per cm or m of drilling depth measure and record. It is also clear that the helpfully 68 can be a "reversing relay" which supplies a reduced output for an enlarged input, which is e.g. Direct measurement of the pulse size can be beneficial.

Furthermore, the pneumatic circuit according to FIG. 2 can be modified in such a way that the air pressure in the time measuring container 61 is changed in the other direction, ie, that it decreases with each pulse. In such an arrangement the timepiece is first pressurized to a certain level and then allowed to vent until a pulse of air of value or interest occurs. The pressure in the container at this point in time is therefore still an indication of the 2 _e it between the pulses. If, for example, it is known that the pressure in the container decreases from approx. 3 at to approx. 2 at in 10 seconds, a display of approx. 2 at indicates that the pulses are separated by 10 seconds in the ^{second time} since the measurement.

Claims

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Claims (10)

Device for monitoring the size and / or number of pulses occurring in a compressed air line, characterized by means of a time measuring container, by means of means which increase the air pressure in this container by a predetermined amount, by responding to the pulses in the compressed air line and connected to the time measuring container (61), the air pressure in this Container in accordance with the occurrence of the air pulses monitoring devices and by on the pulses in the compressed air line responsive, with the timing container (61) connected, the air from this in a on the occurrence of the Elements omitting impulses in a successive manner. 2. Apparatus according to claim 1, characterized in that the air from the timing container (61) discharging elements second air container (46), devices for storing air in this container (46) as a function of time on the pulses, a pneumatic main drain valve (55) connected to the timing container (61) and means for utilizing the in the second air reservoir (46) containing stored air for actuating the exhaust valve (55) in unison with the end of the pulses. 3. Apparatus according to claim 2, characterized in that devices to use the air stored in the second container a pneumatic one connected to the second container (46) and by the air pulses actuatable storage valve (42) and a Berlin office Telephone: 885 60 37/886 2382 Wireword: Invention Berlin 309827/1094 Bank account: W. Meissner, Berliner Bank AG, Berlln-Halensee Kurfliretendamm 130, account no. 36 95 716 000 Postal checking account: W- Meissner, Berlin West 12282-109 pneumatic pilot drain valve (49) included with the The outlet (47) of the storage valve (42) is connected and can be actuated by the air stored in the second container (46), the Inlet port (52) of the pilot relief valve to a pressurized one standing air source (10) and the outlet (53) of this valve (49) are connected to the main drain valve (55). 4. Device for monitoring the size and / or number of in pulses occurring in a compressed air line, characterized by a time measuring container (61), by the air pressure in this container (61) institutions that change a predetermined hatred, by the level of the air pressure in the time measuring container (61), which coincides with the occurrence of the air pulses, monitoring Means and by the air pressure in the timing container (61) following the pulses to that in that container prior to the occurrence devices to restore the pressure present in the air impulses. 5. Apparatus according to claim 4, characterized in that the the Air pressure in the timing container (61) changing a predetermined amount means one at a constant speed rotating motor (81) with a disc (83) having a through hole (84) near its outer circumference, a first (85) and a second (86) air valve connected to a source of compressed air (10) and positioned near the outer periphery of the disc (83) are that through the hole (84) in the disc (83) during its rotation, air for alternating actuation of the air shut-off devices (85 »86) enters a first pneumatic switch valve (91) that the first air shut-off element (85) is assigned and can be actuated by this, and a second pneumatic switching valve (94), which is assigned to the second air shut-off element (86) and can be actuated by this, one with the first switching valve (91) at its inlet opening (95) have connected compressed air source (10) and an air volume container (97) which is connected to the outlet opening (96) of the first switching valve (91) and to the inlet port (98) of the second 309827/109 / » submitted later -43 - Switching valve (9A) is connected, so that a certain volume of pressure air at the outlet opening (99) of the second switching valve (94) occurs with each revolution of the disk (83). 6. Apparatus according to claim 5, characterized in that the first and second Luftabsperrorgan (85, 86) with respect to the turntable (83) have an angular distance of 180 °. 7. Device for monitoring the size and / or number of pulses occurring in a compressed air line, characterized by a pneumatic, a reciprocating pump rod (16) associated measuring transducer valve (15) which can be actuated by this and connected to the input (14) of the measuring transducer valve (15) regulated air supply device (10), through a monostable, connected to an input (18) of the measuring transducer valve (15) and actuated State of this valve (15) from the air supply device (10) with air supplied air container (19), through pneumatic, with the outlet opening (20) of the measuring transducer valve (15) connected to a compared to the regulated air supply device (10) having a lower pressure source (12) connected gates (25 »26), by a pneumatic amplifier connected to the outputs of the gates (25, 26) and to the regulated air supply device (10) (34), which generates a single pulse for each pump rod stroke, and through one to the outlet (37) of the amplifier (34) connected pulse counting device (40). 8. Device for monitoring the size and / or number of pulses occurring in a pressure line, characterized by a pneumatic measuring transducer valve (15) assigned to a reciprocating pump rod (16) and actuatable by this, by one connected to the input (14) of the transducer valve (15) Regulated air supply device (10), through a monostable, connected to an input (18) of the measuring transducer valve (15) and in the actuated state of this valve (15) by the air supply device (10) air reservoir (19) supplied by pneumatic means with 309827/109 /. the outlet opening (20) of the measuring transducer valve (15) connected to a lower pressure source (12) connected to the regulated air supply device (10) (25, 26), by a pneumatic one connected to the outputs of the gates (25, 26) and to the regulated air supply device (10) Amplifier (34), which generates a single pulse for each pump rod stroke, through a timing container (61) the air pressure in this container (61) to a predetermined extent changing means by the level of the air pressure in the Timing container (61), which coincides with the occurrence of the air pulses, monitoring devices and by the air pressure in the timing container (61) following the pulses, to that present in that container prior to the occurrence of the air pulses Pressure restoring facilities. 9. Apparatus according to claim 8, characterized by one with <* η Outlet (37) of the booster valve (34) connected, the pulse counting device (40). 10. The device according to claim 9, characterized in that the gate has a first pneumatic NOR gate (25), the control nozzle (31) is connected to the outlet opening (20) of the measuring transducer valve (15), and a second pneumatic NOR gate (26) whose Control nozzle (30) is connected to the collector pipe (29) of the first gate (25). 309827/1 094