Bottomhole drilling fluid flow rate sensor

FIELD: oil and gas industry.

SUBSTANCE: bottomhole drilling fluid flow rate sensor includes a housing, a diaphragm and connecting tubes. At that, the device located in lower part of a drill pipe immediately above a bit and rigidly fixed on the pipe walls has a mechanical oscillating system made in the form of a hollow counterweight with a membrane, which is torsionally suspended on two capillaries, and with a constant magnet fixed on it, a system of actuation and pickup of oscillations, which interacts with a constant magnet field, and two separating vessels interconnected with the capillaries. Fluorocarbon liquid "Б"-1 serves as separating liquid for space under the membrane of the counterweight, and dibutyl phthalate - for space above the membrane.

EFFECT: improving reliability of measurement of the drilling fluid flow rate immediately during well drilling process.

1 dwg


The invention relates to the drilling technique, namely, devices for determining the flow of mud on the bottom of the borehole during drilling.

It is known device sensor downhole flowmeter (see A.S. of the Russian Federation No. 2018651, 1994), the sensitive element of which is an axial impeller. The disadvantage of this device is that it is impossible to measure the flow of mud on the bottom of the borehole during drilling, so as to measure the required descent device on wireline.

The closest in technical essence (prototype) is a complex flow of gases and liquids "HyperFlow-3 PM (see textbook. the tool Lapalco A.P. Flowmeters variable pressure drop. - M.: ASMS, 2004, pp.92), having a housing, a diaphragm, tubing, valves and differential pressure gauge. The disadvantage of this device is that the operating range of the environment for this device from -30 to +50°C, therefore, it cannot be used to measure the flow of drilling mud on the bottom of the borehole during the drilling process.

The technical objective is to create a reliable device for measuring the flow of mud on the bottom of the borehole during drilling.

The technical result is increased reliability of measuring the flow of drilling Rast is ora directly in the process of drilling wells.

It is achieved by a device located in the lower part of the drill pipe directly above the bit and fixed on the walls of the pipe, has a mechanical oscillatory system, made in the form of torsion hanging on two hollow capillaries balance with the membrane, and fortified it by the permanent magnet, the drive system and removal of oscillations interacting with the field of a permanent magnet, and two separation vessel, connected to capillaries, at the same time as the separation fluid podobrannogo space balance is veropedia liquid B-1, and for namebrands - dibutyl phthalate.

The drawing shows the proposed installation of subsurface flow sensor mud (view in cross-section). The sensor has a housing 1 mounted on the ribs 2 of the inside of the drill pipe 3. On top of the housing 1 in the pipe installed aperture 4. Inside the housing 1 is a hollow balance 5 with a membrane 6, separating the cavity into two parts. Balance 5 torsion hinged on the two sides of the capillary 7, communicating with the cavity of the balance and separation vessels 8. The cavity of the balance 5 full separating two liquids of different density. As the separation fluid podobrannogo space is veropedia liquid B-1 (density 2000 kg/m3at 20°C), and DL is namebrands - dibutyl phthalate (density 1047 kg/m3at 20°C). On the surface of the balance sheet 5 is fixed a permanent magnet 9, which interacts with the drive system and removal 10. The separation vessel 8 by means of the tubes 11 and channel 12 are communicated with the sampling points of pressure above and below the diaphragm 4. At the point of selection pressure for protection against abrasive particles are installed filters 13.

The device operates as follows. The flow of drilling mud passes through the aperture 4, resulting in a pressure drop. Inside wall of the drill pipe 3 are the channels 12-access point selection pressure above and below the diaphragm 4. The channels 12 are communicated through tubes 11 through the separation vessel 8 and the capillary 7 with a cavity balance 5. On the outer surface of the balance sheet 5 is fixed a permanent magnet 9, a field which interacts with the drive system and removal 10. On the winding drive system and removal of 10 with a power generator located on the bottom (not shown), is fed a pulse of electric current. As a result of interaction of the magnetic field of the magnet 9 and the magnetic field induced in the drive system 10, the balance 5 deviates from the equilibrium position. The capillary 7 in this form returns a moment. Once the system is in oscillation, the drive system 10 is eat fluctuations, and the current pulses induced in it, are transmitted to the devil is Novotny electrical communication channel.

Namebrand space in the balance sheet 5 is connected with the positive line of the selection pressure, and pdmembrane - minus. The pressure of the drilling fluid is passed through the separation fluid, and the density of the fluid supplied from the bottom to the membrane, significantly more than the density of the upper fluid. When increasing the flow rate of the drilling fluid change differential pressure, the membrane 6 is bending down, causing a change in mass balance of 5 by squeezing from it a heavy liquid. This leads to an increase in the frequency of oscillation through the system drive and pickup 10 in the form of a frequency signal is transmitted to the wellhead via a wireless electrical connection. Thus, the frequency of the sent pulses depends on the flow rate of the drilling fluid. The frequency of the output signal of the device lies in the ultralow-frequency range, which is in good agreement with the parameters of the wireless electrical connection.

The reliability of measuring the flow of drilling fluid during drilling increases due to the presence of the proposed Converter in the form of a mechanical oscillatory system "balance-elastic element having high reliability, and lack of electronic components, is unable to operate at temperatures above 135°C.

To drop the te influence of temperature changes on the frequency of oscillation of the balance, capillaries torsion fixed in the housing and made of a material with independent temperature coefficient of linear expansion.

The positive effect of improving the reliability of measuring the flow of drilling fluid during drilling.

Deep flow of the drilling fluid, comprising a housing, a diaphragm and a connecting tube, characterized in that the device located at the lower end of the drill pipe directly above the bit and fixed on the walls of the pipe, has a mechanical oscillatory system, made in the form of torsion hanging on two hollow capillaries balance with the membrane, with a fortified it a permanent magnet, a drive system and removal of oscillations interacting with the field of a permanent magnet, and two separation vessel is connected to the capillaries, at the same time as the separation fluid podobrannogo space balance is veropedia liquid B-1, and for namebrands - dibutyl phthalate.


Same patents:

FIELD: oil and gas industry.

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EFFECT: improving reliability and accuracy of measurement of azimuth angle of well deviation.

2 dwg

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36 cl, 10 dwg

FIELD: oil and gas industry.

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1 dwg

Well generator // 2442892

FIELD: electric engineering.

SUBSTANCE: the invention relates to electric engineering and is used to supply power to well equipment. The well generator comprises a protective casing, electric socket, at least one attachment fitting, a rotor with a hydroturbine, permanent magnets, furthermore, the rotor and actuating coils are fixed inside the protective casing, magnets and actuating coils have circular shape and are positioned inside a cylinder with alternation and axial clearance between them. The generator has an additional rotor installed concentrically with the first rotor and connected with it through a reductor. The second rotor ahs a disc with soft magnetic inserts, which is positioned between the actuating coil and permanent magnet. The well generator contains at least one pressure and temperature expansion compensator, linked with the driving clutch.

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3 cl, 4 dwg

FIELD: mining.

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22 cl, 3 dwg

FIELD: mining.

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71 cl, 14 dwg

FIELD: gas and oil production.

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8 cl, 7 dwg

FIELD: oil and gas production.

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2 dwg, 3 cl

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10 cl, 2 dwg

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1 cl, 2 dwg

Inclinometer // 2247942

FIELD: measuring engineering.

SUBSTANCE: inclinometer comprises housing, three-component magnetometric pickup, three-component accelerator, nonmagnetic platform, and adjusting device. The accelerometer is mounted on the nonmagnetic platform. The adjusting device is made for permitting changing the rolling and pitching of the magnetometric pickup with respect to the platform.

EFFECT: enhanced accuracy of measuring.

1 dwg

FIELD: industrial geophysics.

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EFFECT: higher precision.

5 dwg

FIELD: directional drilling, particularly to direct deflectors in vertical wells and in magnetic pipes, as well as in inclined wells with the use of diamagnetic tubes.

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2 cl, 2 dwg

FIELD: survey of boreholes or wells, particularly equipment to control spatial cased or uncased well position during well building.

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EFFECT: increased accuracy and rate of well path measuring.

2 cl, 3 dwg

FIELD: well drilling, particularly to control well direction.

SUBSTANCE: device comprises drilling bit, downhole motor with whipstock, whipstock position measuring module, hydraulic orientator and measuring and telemetric module arranged in non-magnetic sub and connected with ground-based reception and processing complex. Whipstock position measuring module comprises body with central flushing orifice on which electrode is arranged. The electrode is located between insulators and is electrically isolated from the body. Electric circuits, measuring sensors, power source and transmission means are installed in the body. Reception and processing means are included in measuring and telemetric module so that the reception and processing means is separated from whipstock position measuring module by electric spacer and is adapted to receive electric signals from whipstock position measuring module transmitter. Accelerometers may be included in measuring sensors of whipstock position measuring module. Whipstock, whipstock position measuring module and hydraulic orientator may be connected one to another by quick-releasable connector, for instance by thread.

EFFECT: increased well quality, possibility to use flexible drilling pipes, namely coiled tubing, for well drilling.

3 cl, 2 dwg

FIELD: wells, particularly devices to determine slope or direction of oil, gas, geothermal, iron ore and other wells included in directional well drilling systems.

SUBSTANCE: method involves measuring angular velocity by fiber-optic gyroscope and accelerometer installed on rotary panel so that the fiber-optic gyroscope and accelerometer may be installed in at least 8 positions; determining ideal sinusoid parameters, namely amplitudes and initial phases, from measured signals with the use of progressive approximation method; calculating azimuth and zenith angles from the ideal sinusoid parameters. During signal processing systematic error components of sensitive members are compensated.

EFFECT: improved operational capabilities, reduced mass, size and power inputs.

5 cl, 3 dwg

FIELD: oil and gas industry, namely well drilling, particularly to determine spatial position of well bores under drilling.

SUBSTANCE: device comprises frame made as sealed chamber, which is rotated about supports, power source eccentrically secured in frame and made as compressed air cylinder and jet generator provided with feed nozzle, receiving nozzle, outlet nozzle, profile with streamlined surface and communication channel. The feed nozzle communicates with compressed air cylinder. Jet generator has membrane with contact member fastened to the membrane, as well as pinned sliding hollow plummet. Receiving nozzle is created in upper plummet part so that the receiving nozzle may slide with respect to streamlined surface of the profile and communicated with feed nozzle. The jet generator also has contact rings, information reading contacts and transfer contact. Outlet nozzle is communicated with membrane cavity of the membrane. Contact secured to the membrane is linked to contact rings through transfer contact. The contact rings are permanently linked to information reading contacts connected with communication channel.

EFFECT: increased accuracy and reliability of well bore deviation angle determination, possibility of on-line well bore drilling control to provide well bore drilling along optimal paths.

2 dwg

FIELD: electric engineering, namely, engineering of autonomous sources of electric power for telemetry systems used during drilling of oil and gas wells with complex spatial trajectory for shaft driving.

SUBSTANCE: proposed electro-mechanical well power source contains through cover 1, inside which with possible immersion in liquid immovable and movable parts of electric generator 2 and 5 are positioned, respectively. Immovable part 2 contains stator with open magnetic duct 3 and winding 4 of stator, and movable part 5 contains hydro-turbine 6 with central shaft 7 and rotor-inducer 8. open magnetic duct 3 and winding 4 of stator are separated from movable part 5 by non-magnetic, transverse relatively to geometric axis of O - O generator, wall 11 for isolating two hollows 12 and 13, respectively, of both its parts 2 and 5, and open magnetic duct of stator with winding on it is positioned relatively to poles of inducing rotor with possible electromagnetic effect of these elements of both parts of electric generator through its non-magnetic wall. In accordance to invention, open magnetic duct of stator is provided with additional U-shaped section, closing its magnetic circuit by its ends, positioned coaxially to inducer-rotor on the other side of non-magnetic wall in hollow of movable part of electric generator.

EFFECT: increased specific power of device when all other parameters and conditions remain the same, in particular, in constrained dimensions of drilling column.

3 dwg

FIELD: well tilt measurement, in particular, technology for determining spatial position of well borehole by means of ferro-probe tilt meter.

SUBSTANCE: tilt meter contains triads of mutually orthogonal accelerometers rigidly connected to non-magnetic body as well as triads of mutually orthogonal magnetic field strength indicators. Two indicators are mounted at an angle to longitudinal axis of body and turned relatively to plane formed by longitudinal axis of body and sensitivity axis of third indicator for angle, close to 45°. Third sensor is positioned perpendicularly to longitudinal axis of body. Such positioning of magnetometers allows increasing precision of measurements of spatial position of well borehole.

EFFECT: provision of greatest depth of signal circulation of magnetometers during turn of body of inclinometer around longitudinal axis for separating interference, caused by influence of magnetized elements of drilling composition, and useful signal about magnetic azimuth of well borehole.

1 dwg