Above-bit module. RU patent 2509209.
 Drill column / 2507395Drill column contains two elements connected to each other detachably and rigidly with respect to rotation. Each element of drill column contains inner and outer pipe. Between them there formed is annular receiving cavity. Each element of drill column has a wire for power or data transmission. The wire passes along longitudinal axis of drill column. Each wire for power or data transmission is connected to induction coil. For power or data transmission along drill column induction coils are designed with possibility of inductive coupling with each other. The first element of drill column is provided with inner induction coil on outer circumference of its inner pipe. The second element of drill column is provided with outer induction coil on inner circumference of its outer pipe. Induction coils are made segmented consisting of several annular segments and at least partially are overlapped in radial direction. At least two segments are detachably connected to each other. |
 Instrument of electromagnetic logging in process of drilling / 2506611Invention relates to the field of electromagnetic geophysical survey and may be used to perform electromagnetic logging of wells. Substance: the device comprises a body (1), made in the form of a solid metal cylinder. In the body (1) there are at least two receiving (2) and two transmitting (3) antenna units, connected with an electronics unit (4). Inside the body (1) there are two longitudinal holes (5, 6), one of which (5) is made as through for letting through a drilling mud, and in the other one (6) there is an electronics unit (4). |
 System and method for control of multiple downhole tools / 2505674Multiple downhole tools can be driven between operating positions. Downhole tools are connected to a variety of multitapped modules, at that each multitapped module is connected usually to one or downhole tools. Control lines are connected to multitapped modules, and multitapped modules are capable to control downhole tool in bigger quantity than quantity of control lines. Each downhole tool is driven individually delivering pressure through one or several control lines. |
 Power supply unit of bottomhole telemetric system / 2505673Power supply unit of bottomhole telemetric system contains electric generator, bottomhole rotational motor, low-speed autosyn dynamotor which rotor is connected kinematically to shaft of bottomhole motor through magnetic coupling. At that magnetic coupling is made in a sealed housing together with autosyn dynamotor. Low-speed autosyn dynamotor operates at rotary velocity of bottomhole rotational motor. |
| Method of control over downhole instrument operation / 2499138 Proposed method comprises determination of drilling column operating parameters and variation of downhole instrument operation mode depending upon said parameters. Note here that for data transfer to downhole instrument drilling column parameters are abruptly changes by preselected program to fix time intervals between sharp changes in drilling column working parameters with that fixed set of time intervals can be used for variation of downhole instrument operating mode. |
 Method for information transmission via electromagnetic communication channel at operation of well, and device for its implementation / 2494250Method consists in excitation of an electric current in a metal string in a well by means of a ground-based generator connected with one contact to surface part of the metal string and with the other contact to a receiving electrode on the well surface. Commutation of a dielectric insert dividing the metal string in the well into upper and lower parts is performed. Another string of metal pipes lowered to that well is used as the receiving electrode. Therefore, an electric circuit of a metal string in the well and a receiving electrode is formed, via which direct current stabilised as to the value is transmitted from the ground-based generator. Reception of information from the well working face is performed depending on modulation of the value of stress caused by commutation of the dielectric insert. As a ground-based generator there used is a source of stabilised direct current, and as a receiving electrode there can be used a metal string of the tubing. |
 Retaining device inserted into central channel of pipe component of drilling string and appropriate pipe component of drilling string / 2490417Retaining device (13) inserted into a central channel of a drilling string component. The channel has the first diameter on at least a part of the central section of the drilling string component, and the second diameter near the ends of the drilling string component. The second diameter is less than the first diameter. The retaining device (13) comprises a lengthy body (14), forming at least partially a jacket for a transfer line. The lengthy body (14) has transverse dimensions less than the second diameter. Multiple arc elements (15) are arranged along the lengthy body (14). Arc elements are separate from the lengthy body and are attached to it. |
 Method and apparatus for providing contact of electric leads with casing column in multielectrode logging tool for electrical logging through metal column / 2489734Electrodes are separately exposed to the impact of periodically accumulated potential energy of a spring, which is generated by rotating screw pairs and abrupt (impact) release of energy when screw interaction of crests of the screw pairs ceases. The apparatus for realising the method is a drive structure having an output shaft which actuates the screw pairs. During forward rotation, the screw pairs open centralisers and elastically press the electric leads to the wall of the well casing, apply periodic action on the electrodes that are rigidly connected to the electric leads. The electric leads are cut into the wall of the well casing. Impact action occurs when screw interaction between the screw and nut, which is pressed by a power spring, ceases. |
 Seal assembly for electrical logging probe / 2488851Disclosed is a seal assembly for an electrical logging probe, having a cylindrical housing, a plurality of dielectric inserts placed in the housing, a plurality of annular electrodes coaxially placed in the housing between the dielectric inserts and touching the end faces of the dielectric inserts with their end faces, an insulating means placed on the cylindrical housing for electrical insulation of the plurality of annular electrodes from the housing. According to the invention, each of the plurality of annular electrodes and dielectric inserts in contact with the annular electrodes have bevel end faces. The bevel end faces of the electrodes are interfaced with the bevel end faces of the dielectric inserts that are in contact with them. The seal assembly has a means of generating a compression force and fixing, which is in contact with the end face of the dielectric insert, placed distally with respect to said dielectric insert which is in contact with the cylindrical housing. |
 Method of transmitting measurement data by cable-free telemetric system during well drilling / 2486338Disclosed is a method of transmitting measurement data by a cable-free telemetric system when drilling wells, involving encoding and transmitting information via a phase-shift keyed signal in form of a sequence of pulses, synchronising the signal and receiving the encoded information by a land receiver. One-time (initial) phase synchronisation of precision quartz-crystal oscillators of the transmitter of the bottom telemetric system and the land receiver is carried out by accumulating data on the transitioning of the signal through zero and one-time synchronisation of signals using a priori information on the bottom telemetric system at the current moment in time is also carried out. Prolonged stability of synchronisation of said oscillators is ensured by adjusting the phase of the quartz-crystal oscillator of the land receiver relative to the statistically determined transitioning through zero of the signal of the transmitter of the bottom telemetric system. |
 Method for manufacturing drilling column electric separator / 2250994Method includes cutting a special conic thread, which is made with triangular profile with rounded corners, at sleeve and nipple portions of electric separator, sand-stream treatment is performed and also grease is removed from parts screwed together. After that a sub-layer is applied to increase adhesive metal properties. Composition dielectric material is applied to threaded connection of nipple portion, after that thread shape is altered by this material, then adhesive is applied to screwed surfaces of threads and sleeve and nipple portions of electric separator are screwed together. After that a layer of dielectric substance is applied along outer surface of subs. Inside the electric separator a dielectric insert is mounted or dielectric film is applied by pressing method with use of press-form. Dielectric film is applied on outer surface of electric separator by forming method under pressure with use of press-form or of composition dielectric material by winding method. |
 Method to prepare well jet plant for logging horizontal wells / 2252338Method includes lowering of tubing with packer and support into well. Support is provided with bypass ports and seat. Then releasing of packer is carried out. Equipment is fitted on smooth flexible pipe on the ground. For this purpose lower end of flexible pipe is first passed through channel of sealing unit for displacing flexible pipe relative to sealing unit, and then pipe end is passed through stepped through channel and pumped out medium supply channel in jet pump housing, after which end piece is connected to lower end of smooth flexible pipe and instrument for surveying or treatment of producing formation is connected to lower end of flexible pipe, for instance, logging device or perforator and then sealing unit is arranged in stepped through channel of jet pump and flexible pipe with jet pump and instrument for surveyor treatment of producing formation is lowered through tubing into well. When jet pump reaches support, jet pump is fitted in seat in support after which smooth flexible pipe is lowered until instrument for surveying or treatment of producing formation reaches zone of surveying or treatment of producing formation. In process of lowering of smooth flexible pipe, recording of background values of physical parameters of rocks, for instance, temperature patterns, is carried out. |
 Horizontal well logging jet plant / 2252339Proposed well jet plant contains packer and jet pump installed on tubing. Pump is provided with nozzle and mixing chamber with diffuser installed in housing, and stepped through channel is made. Possibility is provided for fitting functional inserts in through channel, for instance, for recording formation pressure built-up curves, and self-contained logging complex is installed on tubing lower than packer for checking physical values, for instance, specific electric resistance of rocks. Jet pump is arranged in casing over producing formation of well. Ring is arranged on tubing lower than packer to center packer in casing. Packer is made of elastic material in form of open-top cup with cone-shaped side wall. Bottom of cup is hermetically secured on tubing, and packer, in its position before removing, has the following dimensions: maximum outer diameter of packer side wall D2 is 0.75-0.99 of inner diameter D1 of casing; length L of packer is from 0.5 to 3 diameters D4 of packer cup bottom; maximum inner diameter D3 of side wall of packer cup is 0.6-0.96 of maximum outer diameter D2of packer cup; and outer diameter D5 of centering ring is 0.8-1.05 of diameter D4 of packer cup bottom. |
 Method of operation of well jet plant at horizontal well logging / 2253761According to proposed method jet pump with stepped through channel in its housing and packer with through channel and complex logging device are lowered into well on tubing string. Logging device is installed under packer on tubing string. Perforated section is made on tubing string from side of its lower end. In process of lowering, using logging device, background values of physical parameters of producing formations are recorded, and then packer is released. Packer is installed higher than producing formations under surveying, and complex logging device is installed in zone of producing formations. Then depression insert is installed in stepped through channel of jet pump housing to separate tubing string, and working liquid medium is fed into nozzle of jet pump, thus building different value depressions in underpacker space of well. At each value of depression, well production rate is measured and then, with jet pump operating, complex logging device is moved along producing formations by displacing tubing string without depacking of packer and geophysical parameters of producing formations are recorded. After completion of surveying, depacking of packer and lifting of tubing string with jet pump and logging device to surface is done. |
 Method for operating gas-lifting oil well, gas-lifting oil well and method for controlling flow of multi-phase flowing substance in gas-lift oil well / 2256067At least one acoustic dynamic is mounted immediately on product pipe in oil well and acoustic characteristic of flowing environment flow is determined in product pipe. It is sent into surface controller, using product pipe. Using surface controller flowing substance flowing mode is determined, on basis of which working parameters of oil well are adjusted. Working parameters of oil well can be adjusted to detect Taylor mode of flow. For adjustment of working parameters throttle is used and/or controlled valve of oil well, controlling amount of gas, forces into product pipe. For determining mode of flow of flowing environment artificial neuron net can be used. It is possible is provide energy for acoustic sensor through product pipe. It is possible to determine additional physical characteristics of flowing substance, for example pressure and temperature. |
 System for controlling connections and feeding of electric current, oil well for extracting oil products (variants) and method for extracting oil product from oil well / 2256074System has first induction throttle, second induction throttle and controlled switch. Second induction throttle is positioned near second branch of pipeline structure. Controlled switch has two outputs. First switch output is electrically connected to pipeline structure on the side of induction throttles connection, where first and second branches of pipeline structure intersect. Second output of switch is electrically connected to pipeline structure on other side of at least one induction throttle. Pipeline structure can be positioned inside oil well, and can have casing string and operation tubing column. Also described is method for extracting oil products from oil well using said system. |
 Method of operation of ejector multifunctional formation tester at testing and completion of horizontal wells / 2256101Method comes to mounting the following device onto tubing string: pump with through channel, packer and liner with intake funnel, lowering the assembly into well, releasing the packer and creating required drawdown in underpacker zone by pumping liquid medium out of underpacker zone by jet pump. Assembly is furnished additionally with unit for disconnecting and connecting tubing string, and valve unit with seat for mounting check valve, and then tubing string is assembled in definite sequence. After these operation, investigation, testing and completion of well are carried out. Then well is set in operation. |
 Ejector multifunctional formation tester for testing and completion of horizontal wells / 2256102Proposed formation tester contains jet pump, unit for connecting and disconnecting tubing string, valve unit with seat for valve insert with check valve, packer and liner with intake funnel, all mounted on tubing string from top to bottom. Jet pump housing accommodates coaxially installed active nozzle and mixing chamber, and channels are made to deliver active medium, pumped out of well and stepped through channel with seat between steps. Possibility is provided for in-turn mounting of sealing unit and interlock insert with through channel which are arranged on flexible smooth pipe higher than tip for connecting self-contained logging complex and insert for recording pressure built-up curves I underpacker space of well under which self-contained instruments are installed for recording pressure, temperature and other physical parameters of well and forming fluids. Invention provides intensification of investigation, testing and preparation of wells, mainly, horizontal and high curvature wells, optimization of operation of jet pump used together with self-contained logging complex and other functional insets for investigation of producing formation. |
 Method of operation of horizontal well ejector multifunctional formation tester / 2256103According to proposed method, the following devices are mounted on tubing string in turn from top to bottom: jet pump, upper mechanical packer, lower packer made of elastic material, centering ring, and, on lower end of tubing string with perforated section, self-contained logging complex is installed and said assembly is lowered into on tubing string. In process of lowering, recording of background values of rock physical fields is done and when self-contained logging complex reaches design depth, upper mechanical packer is released and functional insert is installed in stepped through channel of jet pump to record pressure built up curves and then, by delivering liquid medium into nozzle of jet pump, at least three step rising values of drawdowns are built in underpacker zone and by measuring amounts of pumped out liquid on surface during each down, yields are found, and then drawdowns are built additionally and rock physical fields are recorded by self-contained logging complex. |
 Horizontal well ejector multifunctional formation tester / 2256104Invention relates to pumping facilities. Proposed ejector multifunctional formation tester has mechanical or hydromechanical packer installed on tubing string for fixed positioning in released state in well at preset depth, jet pump accommodating nozzle and mixing chamber with diffuser in its housing, and stepped through channel is made with possibility of fitting functional inserts, for instance, functional insert for recording pressure built up curve. Jet pump is located in casing string over well producing formations, self-contained logging complex is installed lower than packer on tubing string for measuring, for instance, specific electric resistance of rock or for action onto formation by physical fields, for instance, acoustic fields, and second additional packer is installed being made of elastic material in form of open-top cup with conical side wall. Cup bottom is hermetically secured on tubing string, and ring is arranged on rubbing string lower than additional packer for centering packer in casing string, distance between packers being not less than outer diameter of tubing string in place of mounting of additional packer. Thanks to it intensification of investigation and testing of wells with open or cased hole, primarily crooked or horizontal ones, optimization of arrangement of packers at their operation together with jet pump and self-contained logging complex are provided. |
FIELD: physics.
SUBSTANCE: apparatus has a housing with a central flushing hole, a centre electrode which is electrically insulated from the housing and is placed between insulators, as well as electric boards inserted in recesses in the housing in its sealed part, separated by sealing elements, wherein the fixing element of the insulator, situated in the socket part of the housing, is in form of matching protrusions and grooves made in said insulator, the socket part of the housing and the casing of the centre electrode, and the other insulator of the centre electrode, situated in the opposite socket part of the housing, is inserted in a counter-clockwise thread.
EFFECT: improved operational reliability of fixing the centre electrode and simple design.
1 dwg
The proposal relates to the field of Geophysics and is intended for measurement of geophysical and technological parameters during drilling with electromagnetic communication channel.
Information from the slaughter of the technological parameters such as bit revolutions, axial weight on the bit, vibration, geophysical information about drilled rock, is directly measured by a sensor located in the bit module that is installed near bits, and is transmitted to the main hole telemetry system (ZTS) electromagnetic communication channel (Development of bottom-hole telemetry system with electromagnetic communication channel. / Wpepro, Avellino, UAE, Fascintating, Rashidaddin, Snimano. // NTV «Karotaznik», №113, 2003, Tver, p.36).
Bit module (BAT) made in the form of the sub length from 0.5 to 0.7 m from high-strength alloy, through the wash Central hole of which flows the drilling mud. In grooves machined body as BAT are measuring sensors, electronics, and on the surface of the body - the Central electrode and insulators.
A device for measuring geophysical and technological parameters during drilling with electromagnetic communication channel (Pat. The Russian Federation for useful model # 27839, etc. 30.05.2002, 2009).
Known device contains ZTS, including a drill string, case, power supply, measurement modules, the module is receiving-transmitting device, electric separator, made in the form of separate sub installed directly over the downhole motor, and also mounted directly above the bit BAT, connected with the shaft downhole engine and with a chisel.
The disadvantage of this device is in their designs.
Central electrically insulated electrode is placed on the body as BAT, between the two insulators and is fixed relative to body from turning in the drilling process. In the process of work NDM mechanical, vibratory loads in the joints between the insulator and the electrode form backlashes and over time increase them, destroying insulators and shifts the electrode as grooves in the hull, violating their tightness. All the measuring circuit, located in the recesses of the body exposed to aggressive downhole environment and fail, which requires full disassembly and Assembly BAT.
A device for measuring geophysical and technological parameters during drilling with electromagnetic communication channel, in which the task of enhancing the reliability of a construction and increase of a resource of work is partially solved by allocating Central electrode beyond the sealed part of the shell and separated from this part of the sealing elements (Pat. The Russian Federation №2351759, prior. 07.09.2007,, publ. 10.04.2009, 2009).
Known module contains a body with Central flushing hole that is electrically isolated from the case of the Central electrode is located between insulators, and in the hollows of the housing are electrical circuits, sensors, power supply and transmitting device. The Central electrode on the housing made of hermetic part of the grooves, separated from this part of the sealing elements and equipped with point electrocontact, and electric circuits, sensors, power supply and transmitting device are in a sealed part of the module that is separate from the hit of the well fluid with sealing elements and secured against displacement relative to the housing.
Known design allows to prolong service life of electric boards, as they are in a sealed part of the body, but the problem of preservation of insulators remains, moreover, in this layout increases the length of the module, and manageability reduced orienting the BHA.
The most similar to the claimed design NDM is a device for measuring geophysical and technological parameters during drilling with electromagnetic communication channel (Pat. The Russian Federation for useful model # 27839, etc. 30.05.2002, 2009).
Included in the known device NDM contains a body with Central flushing hole that hosts the Central electrode, located between the insulator and is electrically isolated from the case, and in the hollows of the body as BAT are electrical circuits, sensors, power supply and transmitting device, and the module is transmitting device ZTS entered receiving and processing device that receives signals from the BAT.
The Central electrode NDM isolated from the casing coating of insulating material, electric circuits, sensors and power supply are in a sealed part of the BAT, isolated from the hit of the well fluid with sealing elements.
The drawback, as mentioned above, the low reliability of fixation of the Central electrode.
The task of the claimed invention is to increase the operational reliability of fixation of the Central electrode and simplification of design.
This task is solved by the fact that the claimed BAT, with a frame containing a Central washing hole that is electrically isolated from the case of the Central electrode is located between the centres, and also placed in the cavity of the body, in the sealed parts, separate sealing elements, electrical Board electrical circuits, sensors, power supply and transmitting device, etc., fixation of the prison, located in the socket housing parts are made in the form of conjugated bumps and grooves made in this prison, clutch parts casing and liner Central electrode and the other insulator Central electrode, located away from the socket portion of the chassis, installed on the thread with the left direction.
Figure 1 is given to the design of the above-bit module.
On the body 1 there is Central electrode (liner) 2 with insulation cover 3, placed between two insulators 4 and 5. Isolator 4, located in the coupling parts 6 enclosure 1 noted between coupling part 6 case 1 and case 2 through mating tabs on 7 and 8 slots. Isolator 5, located away from the socket, paragraph 6, building 1, installed on the thread 9 from left direction. In hermetic part of the body 1 is located on the electronic Board 10 isolated sealing elements 11. «A» - the direction bit with BAT.
The signal is transmitted from BAT to ZTS made with a wireless communication channel, which provides for the presence of an electric dipole. The electric dipole is formed by the buildings 1 and Central electrode (liner) 2 with insulation cover 3, applied to the housing 1 and insulators 4 and 5. When assembling NDM ledges 7 and 8 slots are engaged with each other and form a single stationary system. Isolator 5 are completed with internal thread 9, meshing with the response body threads 1. Isolator 5 and case 2 touch on smooth surfaces. Given the fact that in the process of drilling rotation BAT is right clockwise «And»the direction of the thread made 9 left, so isolator 5 in rotation tends to feel cozy during and force constantly running out of the socket 2, thereby preventing the occurrence of gaps between mating parts (insulator 4, the case 1, case 2 and insulator 5). As a result, the wear rate of insulators decreases and increases uptime BAT without replacement.
Bit module, containing a body flush with the Central hole that is electrically isolated from Department of the Central electrode is located between the centres, and also placed in the cavity of the body, in the sealed parts, separate sealing elements, electrical Board, wherein the fixation of the prison, located in the socket housing parts are made in the form of mating tabs and slots, manufactured in this facility, the coupling of the case and the case of the Central electrode, and other insulator Central electrode, located away from the socket portion of the chassis, installed on the thread with the left direction.