The control method of drilling deviated horizontal wells
(57) Abstract:The invention relates to drilling, and in particular to methods of monitoring wells. The method includes drilling the wellbore composition of the drill string, consisting of drill pipe, drill bit, downhole motor and bent sub, which is located downhole with the installed sensor and telemetry system with a downhole device located above the downhole motor, the transmission of information from the sensor wirelessly downhole telemetry system and then to the surface. Downhole tool with a sensor placed in the sub between the bit and the shaft of the downhole motor, the sensor measure the frequency of rotation of the bit. In mathematical terms determine the amount of axial load. As a wireless communication channel using ultrasonic or any other wireless communication channel. The application of the method allows to obtain information about the magnitude of the axial load. 1 C.p. f-crystals. The invention relates to the field of drilling, and in particular to methods of process control downhole drilling motors deviated horizontal wells.A known method of controlling the Lotto and parameters of drilling fluid, depending on the parameters of drill cuttings.However, this method does not allow you to quickly get information about the loads on the bit during drilling inclined and horizontal wells.The closest in technical essence and the achieved result is a control method of drilling deviated horizontal wells, including drilling of the wellbore composition of the drill string, consisting of drill pipe, drill bit, downhole motor and bent sub, which is located downhole with the installed sensor and telemetry system, the downhole tool which is located above a downhole motor, and the transmission of information from the sensor wirelessly downhole telemetry system and then follow the cable to the surface. /2/.The known method does not allow you to get complete information about the location of the bottom hole in space, about the size of the axial load on the bit during drilling deviated horizontal wells and insufficiently accurate measurements.The aim of the present invention is the ability to complete information about the magnitude of the axial load on the bit during drilling deviated horizontal wells and increased precision ismono-horizontal wells, it includes drilling the wellbore composition of the drill string, consisting of drill pipe, drill bit, downhole motor and bent sub, which is located downhole with the installed sensor and telemetry system with a downhole device located above the downhole motor, the transmission of information from the sensor wirelessly downhole telemetry system and then to the surface, according to the invention, a downhole tool with a sensor placed in the sub between the bit and the shaft of the downhole motor, and the sensor measures the rotational speed of n bits, which determine the magnitude of the axial load on the bit by the formula:< / BR>< / BR>where nx- frequency of rotation of the bit at idle mode,
n is the frequency of rotation of the bit,
K - coefficient of proportionality, which is determined empirically during benchmark testing downhole motors.In addition, as a wireless communication channel using ultrasonic or any other wireless communication channel.The method consists in the following.Drilling deviated horizontal section of the wellbore lead layout drill quinny device with the installed sensor, and telemetry system with a downhole device that is installed above the downhole motor. Information is transmitted from the sensor wirelessly downhole telemetry system and then to the surface.In the process of drilling measure the frequency of rotation of the bit by means of the sensor, which is installed in the Autonomous downhole tool, located in the sub between the bit and the shaft of the downhole motor. Information from the sensor wirelessly, for example by ultrasonic channel, or any other, is transmitted downhole telemetry system installed above the downhole motor. Further information is transmitted over cable (or other way) to the surface.The dependence of the axial load on the bit can be represented as the following expression:
where nx- frequency of rotation of the bit when idle,
n is the frequency of rotation of the bit,
U - function.The function U can linearize with sufficient accuracy in the form:
< / BR>where nx- frequency of rotation of the bit during idle mode (G=0) - passport characteristic of the shaft hole of the engine,
n is the frequency of rotation of the bit, superensemble engines.When conducting bench tests take the load on the bit G=0, then the value of the frequency of rotation of the bit during idle mode is equal to the passport.In the presence of axial load on the bit appears braking and the amount of speed it decreases.If n=0, then the value of the load is considered to be the brake, whereby rotation of the shaft in the downhole motor stops.nx- passport size, i.e. the frequency of idling rotation (G=0).Example.If the passport value of nxof rotation of the bit (shaft mud motor) is equal to 250 rpm and in the process of drilling the frequency of rotation of the bit (shaft mud motor), measured by the sensor is equal to n=150 rpmBench tests showed that K=15 rpm, then the axial load is equal to:
< / BR>The use of the invention allows to obtain complete information about the magnitude of the axial load on the bit while drilling directional horizontal section of the wellbore, which will allow control of the drilling process.Sources of information
1. A. C. the USSR 1693235, CL E 21 In 44/00, publ. 1991, BI 3.2. Bulatov, A. I. and other Control processes drilling is I deviated horizontal wells, it includes drilling the wellbore composition of the drill string, consisting of drill pipe, drill bit, downhole motor and bent sub, which is located downhole with the installed sensor and telemetry system with a downhole device located above the downhole motor, the transmission of information from the sensor wirelessly downhole telemetry system and further to the surface, wherein the downhole tool with a sensor placed in the sub between the bit and the shaft of the downhole motor, and the sensor measures the rotational speed n of the bit, which determine the magnitude of the axial load on the bit by the formula
< / BR>where nx- frequency of rotation of the bit when idle,
n is the frequency of rotation of the bit,
K - coefficient of proportionality, which is determined empirically during benchmark testing downhole motors.2. The method according to p. 1, characterized in that the quality of the wireless communication channel using ultrasonic or any other wireless communication channel.
FIELD: mining industry.
SUBSTANCE: system includes mathematical model of drilling process in form of combined influence of conditions at pit-face and of drilling column operation. Model of drilling process is constantly renewed by results of well measurements performed during drilling operation. On basis of renewed drilling process model a set of optimal drilling parameters is determined and sent to system for controlling surface equipment. Also, system allows surface equipment control system to automatically adjust current control sets for surface equipment on basis of renewed optimal drilling parameters. Different control scenarios are generated and executed for transferring data to surface equipment control system on basis of current drilling mode.
EFFECT: optimized operation.
2 cl, 7 dwg
FIELD: construction industry.
SUBSTANCE: device has base moving carriage with frame, driving actuators, volumetric hydraulic drive with pumps and driving engines for actuators of left and right boards and stopping brakes with mechanism for controlling these, and also of, mounted on frame of moving carriage via manipulator, feeder frame with rotation gears and traction of drilling base along well axis with hydraulic engines of drives of these mechanisms, while hydraulic rotation engines of drilling base and its feeding gear during drilling are connected to pumps of right and left board instead of actuator drives hydraulic engines, via two-positional holders, which are controlled together with stopping brakes. If brakes are made with braking hydraulic cylinders and control holder for these, two-positional holders are made with hydraulic control, and inputs into chambers for control thereof are connected by mains to input into braking cylinders of stopping brakes. To combine possibilities of drilling vertical and/or horizontal well suspension gear is made in form of four-assembly device, on joints, with hydraulic cylinder for slanting feeder frame, which device is supported by means of transverse beam. To provide for possible drilling at corners of rectangular pit, feeder frame is fixed in intermediate guide of support gear with possible longitudinal displacement, and transverse beam of suspension gear is made symmetrical relatively to longitudinal symmetry plane of carriage.
EFFECT: higher efficiency.
4 cl, 6 dwg
FIELD: well drilling equipment, particularly for laying pipelines and for trenchless engineering system forming.
SUBSTANCE: system includes several hydraulic monitors, planetary reducers of rotator and control unit. Each hydraulic monitor is provided with fixed sliding unit located between hydraulic monitor and planetary reducer of drivers providing rotary and reciprocating movement and made as three flanges. The main flange is secured to planetary reducer, upper and lower ones are connected one to another and installed on hydraulic monitor body. Joint between the flanges is provided with sealing member. The main flange has parallel levers on which hydraulic cylinders connected with pressure-gauges are mounted. Hydraulic cylinder rods are connected with stop screws of upper flange lever. Two hydraulic cylinders and two pressure-gauges are installed on each hydraulic monitor. Pressure-gauge scales are recalibrated to index of torque developed by hydraulic monitor and are installed on gauge board located on drilling rig slider. Two regulating throttles are installed on liquid feed lines, which supply each monitor with working liquid.
EFFECT: possibility to determine power to synchronize operation of several hydraulic monitors.
FIELD: oil production industry, particularly for applying pressure to chisel providing with downhole motor.
SUBSTANCE: method involves installing acoustic noise transducer above downhole motor; converting downhole motor noise into ultrasound so that ultrasound have action on friction reduction between drill string and bottomhole motor and well walls to apply following effective pressure to chisel in accordance with geological-technical order.
EFFECT: increased efficiency of deviating and horizontal well drilling.
1 ex, 4 dwg
FIELD: mining industry, particularly for drilling exploratory and pressure-relief wells before mineral extraction from formations, including outburst-dangerous formations and ones characterized with high gas content.
SUBSTANCE: drilling rig comprises housing, support, drive to rotate drilling rod provided with cutting tool and hydraulic cylinder for cutting tool pulldown. Electrohydraulic valve is installed in hydraulic cylinder circuit. Electric drive of electrohydraulic valve is linked with load-sensing unit, which detects load applied to drilling rod rotation drive. The electric drive is connected to load-sensing unit through amplifier relay to provide bringing amplifier relay into operation when load applied to rotation drive exceeds nominal load by 20-30%. Cutting tool is made as symmetric screw conveying surfaces defining forward and reverse strokes connected one with another through generatrix. Side cutting edges of surfaces defining forward and reverse strokes are spaced apart.
EFFECT: increased operational reliability along with reduced power inputs for drilling, possibility to remove rod from well with negligible deviation thereof from predetermined direction of drilling.
2 cl, 3 dwg
FIELD: borehole drilling, particularly to control drilling machine rod rotation.
SUBSTANCE: method involves performing drilling machine rod rotation frequency with the use of microprocessor-controlled servomotor on the base of signals received from rotational velocity and feed rate sensors. Above control is performed in two stages. At the first stage cutter rotation frequency is smoothly changed from 50 rpm to 700 rpm and optimal rotation frequency value corresponding to maximal drilling speed is determined with the use of microprocessor, which controls the servomotor. At the second stage optimal cutter rotation speed is set by microprocessor-operated servomotor.
EFFECT: increased reliability and accuracy of drilling machine rod rotation control.
2 cl, 3 dwg
FIELD: measuring equipment engineering, possible use for measuring flow and properties of solutions, in particular, in oil-gas extractive industry for controlling flow and properties of drilling and cementing agent during drilling of wells and their cementing.
SUBSTANCE: system contains indicators of pressure and temperature, device for measuring density of solution, device for measuring conductivity of solution, computing device, information display. Indicators of pressure and temperature, device for measuring solution density, solution conductivity meter and computing device are positioned in compact manner within one measuring module, installed in main pipeline; measuring module contains additionally device for measuring pressure drop on narrowing device, solution density meter is made in form of two-probe gamma density meter with low-background source of gamma-radiation, computing device provides, in accordance to given algorithm, for determining and computation of volumetric flow of solution, of mass flow of solution, of solution density, of electric conductivity or mineralization of solution, of solution temperature, of system pressure, content of solid phase in solution, well hydraulic losses coefficient; measuring module via information cable is connected to information display for controlling the process of drilling or cementing.
EFFECT: increased parameters being measured, increased reliability of system operation and decreased costs of same.
9 cl, 2 dwg
FIELD: measuring equipment, possible use for measuring volume, density and temperature of liquids in reservoirs connected to atmosphere in oil and gas extractive industry and prospecting for controlling volume, density and temperature of washing liquid in receiving and topping up vessels of drilling plants during drilling of wells.
SUBSTANCE: system contains at least two measuring modules, each one of which is represented by a structure, consisting of two coaxially positioned pipes, connected in upper section to hermetic section, in which devices for measuring level, pressure and temperature of washing liquid are positioned, electronics block, measuring modules are provided with overhanging supports for mounting in vessels and are connected by information cables to information display of driller.
EFFECT: increased precision of parameters being determined, and also increased reliability of system operation and decreased complexity of maintenance due to simplification of construction.
8 cl, 2 dwg
FIELD: automatic control systems specially adapted for well drilling operations used for drilling and operation of wells, blast-holes and for other procedures.
SUBSTANCE: recorder comprises body with electronic unit and power supply unit arranged in the body. Electronic unit includes microprocessor with executive program, x and y plane accelerometer, nonvolatile memory microcircuit, calendar time timing means, temperature sensor and data input-output port, which provides data output and input in computer with the use of communication interface. Microprocessor output is connected to the first input of nonvolatile memory microcircuit. X and y plane accelerometer is linked to the first microprocessor input, calendar time timing means is communicated with the second microprocessor input and temperature sensor output is connected to the third microprocessor input. Temperature sensor input is connected to power supply unit. Input and output of data input-output port are linked to microprocessor. Input of data input-output port is connected to power supply unit. Calendar time timing means input, the forth microprocessor input and accelerometer input are linked to the second nonvolatile memory microcircuit input.
EFFECT: increased accuracy and information content due to recording of new parameters, hydraulic downhole motor rotation speed, vertical tool vibration, temperature measurement and data binding to calendar time with high accuracy and decreased size.
FIELD: well drilling, particularly drilling of slightly inclined wells along with current well coordinate measurement.
SUBSTANCE: method involves determining axial load applied to bit, bit rotation speed, drilling mud supply rate and current hole bottom coordinates, namely zenith, apsidal and azimuth angles; measuring natural gamma radiation of rock to be drilled and longitudinal drilling string vibration by means of sensors included in downhole instrument of telemetering system provided with communication channel to communicate hole bottom with day surface; determining lithologically uniform drillable rock bound and longitudinal drilling string vibration corresponding to them; comparing obtained values of actual longitudinal bit vibrations with that obtained from estimated dependence and if above values differ drilling operation is terminated and bit is lifted for inspection thereof.
EFFECT: increased time of bit presence in well bottom.
1 ex, 2 dwg