Autonomous modification of the frequency of rotation of the site of the drill string

FIELD: mining.

SUBSTANCE: method of operation of drill string includes a standalone modification of frequency of rotation located in the borehole of the plot of the drill string in borehole hosted on other sites the drill string, each of these sites contains many sections of drill pipe. The drill string that has altered the frequency of rotation, can represent the lower section of the drill string, located between the end of the drill string, located on the bottom and curved stretch of wells in which the drill string. The lower stretch of the drill string can have increased frequency of rotation relative to the rotational speed of the Drill string plot located within curved plot hole. Autonomous modification of frequency of rotation can be implemented by attaching one or more gears to the drill string, and gear specified device made with the ability to switch between release mode, in which the specified device transmits the torque and the rotation of the drill string without modification, and the clutch, which specified the device transmits the torque and the rotation of the entire length of the drill string with a modified rotational speed and torque. Selective switching gear shifting devices located in the well can be carried out from the ground.

EFFECT: stable rotation speed of each of the sections of the drill string.

22 cl, 9 dwg

 



 

Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to conducting connections of drilling pipes for signal transmission between a bottomhole and a surface. The electric connector is offered which contains the first and second parts (10, 20) of the connector which contain the first and second contact elements (11, 21) and the first and second holders (1b, 3a) respectively which hold the first and second parts of the connector, and can be assembled to each other by means of screw or bayonet fastening device. The first part of the connector contains the elastic bearing frame (13), the proximal end (13a) made integral with the first holder, and the distal end (13b) holding the first contact element. The second part of the connector contains a bearing ring (23) which provides engaging with the sliding image of the first contact element when fastening between the first and the second holders. On a limited circular arch of the bearing ring the second contact element is placed, and the ledge (30) is provisioned for stopping which is suitable to stop the first contact element at the second contact element to provide connection with the connector parts.

EFFECT: technical result is improvement of accuracy and reliability of connection at the expense of avoidance of discrepancy and axial gaps between electric contacts during assembly.

18 cl, 12 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention claims method of bottomhole communication with the surface via cable-free telemetric system during well drilling, involving measurement channel data coding by noise-type signal and further transmission of measurement channel data in packets containing timing code, packet code and channel data. Measurement channel data are converted into pages of random length. Pages are split into parts for transmission in packets. Packet size is aligned with payload volume of noise-type signals. Packet code includes either new page start label and page format number, or label of previous page continuation.

EFFECT: efficient utilisation of payload traffic available in an information packet in communication channel with noise-type signal, enhanced flexibility of measured well data transmission sequence.

FIELD: radio engineering, communication.

SUBSTANCE: disclosed is a method for wireless transmission to the earth's surface of data of a base telemetry system with an above-bit unit, which includes measuring downhole parameters, encoding and transmitting signals by emission thereof with an electrode into the rock via a high-speed wireless electromagnetic link, receiving said signals with a base telemetry system and transmitting to the surface through an electrical divider of the base telemetry system. An additional electrical divider is placed in the immediate vicinity of the above-bit unit, said divider having a key element controlled by the base telemetry system and being used to receive signals emitted by the electrode of the above-bit unit. Dipole electrodes are opened when receiving signals with the key element and said electrodes are closed when the base telemetry system transmits signals through the key element. In the disclosed device, dipole electrodes of the main divider are connected to a transmitting unit and dipole electrodes of the additional divider are connected to receiving unit of the base telemetry system.

EFFECT: high reliability of transmitting information data from a downhole unit to a downhole telemetry system and then to the earth's surface.

2 cl, 1 dwg

FIELD: physics, geophysics.

SUBSTANCE: invention relates to geophysical studies during drilling of oil and gas wells using telemetering systems with wireless electromagnetic data link. The power supply and bottomhole information transmission unit contains the turbine, electrical generator, electrical separator in assembly with the drilling string, module of sensors for measuring of bottomhole information and electronic unit. Meanwhile the electronic unit contains the bidirectional triode thyristor unit, bidirectional triode thyristor control unit, impulse signal current sensor, voltage sensor of the power winding of the electrical generator and temperature sensor, meanwhile the electronic unit is installed in tight compartment of the electrical generator housing, which in addition functions as a heat sink. Besides bidirectional triode thyristors are installed on the electrical generator housing itself, and the electronic unit is designed with a possibility of automatic stabilization of the current of transmission impulse signal and its restriction at exceeding the preset temperature of the bidirectional triode thyristor unit.

EFFECT: improvement of reliable transmission of impulse signals via electromagnetic data link and maximum possible depth of drilling.

4 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: generator, external stator placed in as sealed body, internal rotor installed at the generator shaft with roller bearings in sealed cavity filled with a lubricant coolant and sealing components. At that the generator sealed body is divided into three sealed loops - electrical, kinematic and protective ones. Electric loop of the stator is equipped with an independent compensating diaphragm and filled with cooling liquid and separated from the kinematic loop by a screen made of non-magnet material. Kinematic loop of the bearings is filled with lubricant and separated by a system of cup-type seals and inner diaphragm from the protective loop of an end sealing compensator filled with lubricant in the volume limited by the outside diaphragm. The electrical loop is filled with dielectric cooling liquid without excessive pressure; the kinematic is filled with dielectric cooling liquid without excessive pressure; protective is filled with dielectric cooling liquid under excessive pressure. Besides, the protective loop may be filled with lubricant having higher viscosity and higher boundary tension in comparison with lubricant in the kinematic loop. Zero point of the stator windings is coupled to the body through a plugging contact. The filling system for the protective and kinematic loops has a valve spindle to switch between the filled loops at vacuuming and filling of lubricant. Rigidity of diaphragms in the electric and kinematic loops is higher than the same in the protective loop.

EFFECT: improving reliability of the generator and reducing labour intensity during repair and maintenance operations.

6 cl, 1 dwg

FIELD: physics; geophysics.

SUBSTANCE: invention relates to geophysics and can be used in logging operations. Disclosed are methods and systems for downhole telemetry using a device configured or designed for deployment in a drilled well which crosses an underground formation. The device includes a downhole telemetry unit, a surface telemetry unit and a line for transmitting data between the downhole and surface units, configured to designed to transmit data over one or more data transmission channels using at least one telemetry circuit selected from a plurality of telemetry circuits based on at least one downhole parameter.

EFFECT: high quality of transmitting exploration data.

26 cl, 7 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to logging in drilling and serves to transmission of measurement signals from the well to surface via wireless communication line. Proposed method comprises excitation of electric current in well tubing divided by dielectric inserts into top and bottom parts and registration of voltage change caused by current pulsation in tubing on the surface. Note here that wanted signal represents the voltage variation at receiver cylindrical coil terminals that makes the function of AC in pipe excited by alternating e.m.f. applied to dielectric insert. Proposed device comprises AC source connected to tubing in well divided by dielectric insert into top and bottom parts and surface cylindrical receiver coil with magnetic core composed of a hollow cylinder arranged coaxially at said tubing. Note here that several coil can be used arranged one above the other and equipped with band amplifiers their outputs being summed at voltage registrar input.

EFFECT: simplified and accelerated transmission of signals from well bottom.

2 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method is suggested for terrestrial data transfer and receipt in drilling process, which includes receipt of data from sensors of the bottomhole telemetry system, terrestrial data transfer with their further decoding and data transfer to the registers of information users. At that data transfer is carried out through cables of the power lines feeding the registers of information users and surface sensors installed at the drilling site and pumping equipment. Besides receivers receiving data from sensors of the bottomhole telemetry system, surface sensors, the basis computer and receivers in the registers of information users are equipped with electrical PLC-modems with the embedded network protocol including an interface block and programming interface units for data receipt and transfer through power lines. The device for implementation of the above method is also claimed.

EFFECT: ensuring on-line monitoring of the remote registers distributed at the drilling site, improving reliability and operating convenience of the terrestrial data transfer system.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: drill string bottom part assembly comprises downhole motor fitted at said drill string and having rotor and stator. Note here that first hole is made in said rotor. Spindle arranged under downhole motor with second hole made therein. Third hole is made in the shaft with first and second ends. First end is coupled with rotor via first universal adapter. Second end is coupled with spindle via second universal adapter. Inner rod is fitted in the shaft third hole. Note here that inner rod has inner passage and third and fourth ends. Third end seals communication of inner passage with the rotor first hole while fourth end seals communication of inner passage with the spindle second hole.

EFFECT: transducer signal transmission, power supply inside assembly spinning elements.

21 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: system of connection to current-carrying lines consisting of current-carrying shell line, first current-carrying line, second current-carrying line and third current-carrying line includes: first control module capable to connect with the first current-carrying line and stay in serial connection with first electricity receiver in the well, connected to the second current-carrying line; second control module capable to connect with the second current-carrying line and stay in serial connection with second electricity receiver in the well, connected to the first current-carrying line; third control module capable to connect with the first current-carrying line and stay in serial connection with third electricity receiver in the well, connected to the third current-carrying line; and fourth control module capable to connect with the first current-carrying line and stay in serial connection with fourth electricity receiver in the well, connected to current-carrying line of the shell. When the first control module feeds current to the first electricity receiver in the well, second, third and fourth control modules feed uncontrolled current to the second, third and fourth electricity receivers in the well, respectively.

EFFECT: efficient power supply to well devices, particularly reduced number or complete elimination of electric power receivers of well devices, fed by uncontrolled current or obtaining electric power in other uncontrolled ways, due to isolation of current fed to receiver.

18 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: downhole tool includes a drill bit on its lower end and a drill motor containing a casing with a rotor rotating in the rotor channel in the casing when the drill tool passes through it. The rotor has a bypass channel for bypassing some portion of the drill mud via it. The valve includes a plate of the valve, which is installed upstream of the motor and has at least one flow pass and at least one bypass passing through the same plate. At least one flow pass is hydraulically interconnected with the rotor channel for passage of the drill mud passing through it. The rotor is made so that it can be rotated in the casing. At least one bypass is selectively hydraulically interconnected with the bypass valve when the rotor is being rotated in the casing, and the bypass channel is selectively moved in a position of alignment with at least some part of at least one bypass for bypass of some part of the drill mud via it, thus generating an impact action on the hammer.

EFFECT: preventing seizures of a drill tool, reducing vibration, increasing drilling efficiency with a downhole tool so that the bit damage is prevented.

25 cl, 14 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to borehole helical motors. This motor consists of two, tope and bottom sections. Each of the latter comprises screw working members built around multistart gerotor mechanism with internal cycloidal engagement. Spindle with output shaft runs in axial and radial bearings. Hinge joint of rotor helical working members with output shaft and fluid passages. Helical working members stator of top section is fixed at drilling string. Bottom section output shaft is coupled with rock cutting tool. Top section output shaft is rigidly coupled with bottom section helical working member stator fitted in adapter bore coupling fixed bodies of spindles and concentrically spinning in adapter radial bearing.

EFFECT: enhanced power characteristics, particularly, higher output shaft rpm.

2 cl, 5 dwg

FIELD: mining.

SUBSTANCE: drill string bottom part assembly comprises downhole motor fitted at said drill string and having rotor and stator. Note here that first hole is made in said rotor. Spindle arranged under downhole motor with second hole made therein. Third hole is made in the shaft with first and second ends. First end is coupled with rotor via first universal adapter. Second end is coupled with spindle via second universal adapter. Inner rod is fitted in the shaft third hole. Note here that inner rod has inner passage and third and fourth ends. Third end seals communication of inner passage with the rotor first hole while fourth end seals communication of inner passage with the spindle second hole.

EFFECT: transducer signal transmission, power supply inside assembly spinning elements.

21 cl, 8 dwg

FIELD: oil and gas industry.

SUBSTANCE: device contains a hollow body with a gerotor screw mechanism inside that includes a stator placed in the body coaxially and a rotor installed inside the stator and the rotor rotation is carried out by fluid delivered by the pump, a transmission section that includes a shaft mounted at the axial bearing made as a multirow thrust and radial bearing and at the upper and lower radial skid bases consisting of the outer and inner sleeves placed in the transmission section body and respectively at the transmission section shaft; the transmission section shaft is fixed at the input by a drive shaft with a rotor and at the output it is fixed with a chisel; the motor is equipped with the upper collar grab consisting of a shaft, a thrust and a nut and the lower collar grab made as a fishing collar with the outer fishing clamp, a thrust collar and the lower threaded crossover with an inner fishing clamp; the upper collar grab is fixed to the upper part of the gerotor screw mechanism while the lower collar grab in mounted at the transmission section shaft between the inner sleeve of the lower radial bearing and the axial bearing made as a multirow thrust and radial bearing. The transmission section shaft and the fishing collar of the lower collar grab with the outer fishing clamp are fixed rigidly with each other by means of a common thread thus providing tightness at butt ends of the thrust collar placed between butt ends of the fishing collar and the inner collar of the lower radial skid base. Cross-threading direction of the transmission section shaft and the fishing collar of the lower collar grab coincide with the direction of drill string rotation during tripping out.

EFFECT: improving accident-free operation, service life and reliability of motors, accuracy of hole making and the rate of parameters set for the hole curvature and passing ability.

5 cl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises measuring the pressure in injection line with loaded and idle bit and maintaining constant measured differential pressure. Note here that maximum tolerable bit feed speed (Vtf) is defined by mathematical formula. Then, bit feed speeds are defined and in case it exceeds said maximum tolerable magnitude it is decreased to Vtf.

EFFECT: higher efficiency of drilling.

2 dwg

FIELD: mining.

SUBSTANCE: invention refers to drilling equipment, and namely to downhole motors for well drilling. A spindle includes a housing, a throttle and a shaft with a through axial channel, which is installed in the housing with possibility of axial movement within the limits of a guaranteed play. Between three sealed radial supports there installed are two sections of a multistage bearing plate to take an axial load in downward and upward directions. Each stage of the bearing plate consists of discs with supply hydraulic channels and flow centre plates, the rubber elements of which have annular chambers forming together with discs the thrust hydrostatic bearings. A throttle is replaceable and installed in an axial channel of the shaft. Diameter of the throttle pass for creation of pressure drop is chosen in compliance with an expected hydraulic load on the axial support in start-up operating mode of the motor. On outer surface of the shaft there are blind longitudinal slots hydraulically connecting in a separate manner a cavity above upper radial support to annular chambers of the upper section of the bearing plate and a cavity above the middle radial support to annular chambers of the lower section of the bearing plate. The cavity above lower radial support is hydraulically interconnected with the shaft axial channel below the throttle.

EFFECT: improvement of a motor structure.

1 cl, 3 dwg, 2 tbl

FIELD: oil and gas industry.

SUBSTANCE: unit to control power load onto working elements of a screw downhole motor comprises a half-coupling with radial and axial through channels, a spring-loaded container installed in the axial through channel of the half-coupling with a hydraulic monitor attachment, a burnisher of alternating cross section, installed as capable of axial displacement, a spring and seals. It also comprises a hollow pressing nut installed in the axial through channel of the half-coupling for interaction with the spring-loaded container and with an inner ledge made in the axial through channel of the half-coupling or the burnisher. The burnisher is made in the form of a replaceable tip installed onto the stem.

EFFECT: makes it possible to increase efficiency, reliability and durability.

3 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: motor includes a housing with a rotor arranged inside it, the rotation of which is performed by the fluid medium supplied with a pump, as well as a spindle housing with a shaft arranged inside it, which is installed on radial and axial sliding supports. The spindle shaft is attached to the motor rotor and a bit. Some amount of fluid medium is pumped through radial and axial sliding supports, and axial support of the spindle is made in the form of two pairs of rotor and stator rings with an annular row of thrust modules, which is fixed in each of them. Stator rings are fixed in the spindle housing, rotor rings are installed on the spindle shaft, and each thrust module includes layers of polycrystalline diamonds on the edge facing the edges of adjacent modules, and contacts in turn with one or two edges of adjacent modules. The motor includes a splined bush with external splines, which is installed on the spindle shaft, and two elastic damping supports arranged on the edges of the splined bush and receiving axial forces acting on the axial support of the spindle. Each elastic damping support contacts the rear edge of the corresponding rotor ring with the fixed annular row of thrust modules, and rotor rings with annular rows of thrust modules fixed in them are provided with internal splines corresponding to external splines of the splined bush, and each of them is installed with possibility of annular distortion of the rotor ring with the annular row of thrust modules, which is fixed in it, relative to its own elastic damping support.

EFFECT: increasing service life and improving reliability of the axial sliding support of the spindle of the hydraulic downhole motor with thrust modules; improving accuracy of curvature parameters of the well shaft; enlarging the hole boring per bit run using hydraulic jars in the tubing; increasing the increase rate of curvature parameters of wells, and reducing stresses in the layout of the bottom of the drill column and downtime of the drilling unit.

6 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: device includes frame 2, powder brake 3, kinematic chain A between outlet shaft of HBM 1 and rotor 4 of powder brake 3, hydraulic baffle plate 5, monitoring and testing unit 6 and date control and processing unit 7. Kinematic chain A is made in the form of gear-type conical multiplier 8 with coupling clutches 9, 10 in connections of its shafts 11 and 12 with outlet shaft B of HBM 1 and rotor 4 of powder brake 3. Hydraulic baffle plate 5 is made on cover plate 13 of multiplier 8 in the form of an annular reservoir enclosing with seal 14 the lower part of housing B of HBM 1.

EFFECT: improving accuracy and enlarging the HBM loading range at testing, and possibility of stand-alone use.

1 dwg

FIELD: machine building.

SUBSTANCE: invention is used for run-in and test of hydraulic bottomhole motor (HBM). When testing HBM 1, it is installed in a vertical position above well 2 of its further operation and attached to housing A by means of spinning wrench 3 on stationary drilling outfit 4 of well 2. Outlet shaft 5 of spindle 6 of HBM 1 is attached through coupling device 7 to inlet shaft 8 of multiplier 9 installed on rotary table 10. Rotation of rotor 11 with spindle 6 is performed by injection of working fluid to HBM 1 through adapter 12 of pump station 13 of drilling outfit 4 of well 2. Mechanical loading of outlet shaft 5 of spindle 6 is performed through multiplier 9 kinematically connected at its outlet shaft 15 to powder brake 17, with further measurement and analysis of revolutions and braking moments at the outlet of the latter, and flow rate and pressure of working fluid at HBM 1 inlet.

EFFECT: improving accuracy of the method and its approximation to HBM operating conditions.

1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to production of hydrocarbons from several beds and to their mixing. Well tool consists of several tubular sections connected by a new thread-less linear connection system. Cylindrical walls of adjacent walls are provided with channel for electrical conductors for connection of electronic components in the tool different sections.

EFFECT: maintenance of barometric pressure inside well tool.

32 cl, 14 dwg

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