Downhole equipment centraliser
FIELD: oil and gas production.
SUBSTANCE: downhole equipment centraliser comprising a hollow rod with a socket end, a coupling, a cylinder, a piston pusher and rams partially radially movable forward when travelling along the tapered case. Besides the coupling is provided from beneath; from the top, the hollow rod is equipped with a landing seat, and the cylinder wherein all the movable elements are provided, comprises ram windows and seats between the coupling and the landing seat while being designed to rotate and join a centre tube of the hollow rod; the tapered case is rigidly connected with the piston pusher spring-assisted from beneath to travel longitudinally downwards and rotate about the hollow rod.
EFFECT: rigid and reliable centering of the downhole equipment in the required interval.
The proposal relates to the oil and gas industry, namely, devices for centering of downhole equipment.
The famous "Centralizer casing" (patent RU №2209921, EV 17/10, publ. bull. No. 22 of 10.08.2003 year), including located on the casing cylinder, shear tube that tells the cylinder chamber with nutricology, the piston, the centering elements, and the cylinder is rigidly connected with the casing, a piston in the lower part is made conical, and centering elements are in the form of a split petal conical sleeve having on the outer side along the perimeter of the groove, the cylindrical portion of the tapered sleeve is rigidly connected to the casing, and the lower tapered portion of the piston is installed with the opportunity to interact with split petals taper sleeve. In addition, the piston is made with a longitudinal slot.
The disadvantage of this device is the lack of a return mechanism of the centering elements in the source transport position, which can lead to jamming and emergencies. In addition, there is no possibility of rotation of the centering elements with respect to the casing, which creates additional resistance in the process.
The closest in technical essence and the achieved result is the Centralizer b the oxidation of sulfhydryl tool (patent RU №2151853, EV 17/10, publ. bull. No. 18 of 27.06.2000 g)containing the coupler, which is connected to the hollow rod, the cover plates are installed with the possibility of moving the cone-beam case, the sub hydraulic channels and the cylinder, piston plunger, rubber ring, four screws, cuff, steel compression rings and Shoe, and before entering the hydraulic channels welded lights with holes, inside of which is placed a Teflon balls, and the piston-plunger is cut into four parts according to the number of dice of the centralizer.
The disadvantage of this device is that the centering elements in the process of drilling tool rotates with the column of drill pipe, which creates additional resistance and vibration during operation and reduces the service life of the dies of the centralizer. Consequently, the accuracy of direction centered equipment at work (e.g., dilator in the extension of the wellbore). In addition, during descent of the tool in a given interval of possible spontaneous output of the centering elements in operating position, as they are not recorded in the transport position, which can lead to jamming and emergency situations.
The technical objective of the proposed centralizer is to provide a reliable high resource device, the quarter is found in the required interval, providing accurate rigid centering with a uniform force distribution and, as a consequence, the exact direction of movement of the downhole equipment and the reduction of vibrations.
The technical problem solved by the centralizer of downhole equipment, comprising a hollow shaft with the clutch cone housing, cylinder, piston-plunger and die made with the possibility of a limited radial extension when moving the cone-beam case.
What's new is that the clutch is on the bottom, a hollow stem on the top is equipped with stops, and a cylinder which contains all moving parts, equipped with the Windows under the die and is installed between the clutch and it stops with the possibility of rotation and is in communication with the Central channel of the hollow shaft, while the tapered housing is rigidly connected with the spring loaded bottom of the piston-plunger with the possibility of longitudinal movement down and rotation relative to the hollow rod.
Figure 1 shows the centralizer of downhole equipment, General view of the axial section in the transport position, figure 2 - General view of the axial section in the working position, figure 3 - cross section a-A.
The centralizer downhole equipment includes a hollow shaft 1 (see Fig 1 and 2), above, is equipped with a stop 2, a conical housing 3, plate 4, made with limited radial extension when moving the cone-beam case 3 nahodyaschiysya with him in engagement through a "dovetail" 5. Conical housing 3 is rigidly connected preloaded with bottom spring, 6 piston-plunger 7. The hollow rod 1 from the bottom is connected with the coupling 8, and between the stop 2 and the sleeve 8 rotatably located cylinder 9, is equipped under 10 die 4. For the transmission of hydraulic pressure on the piston-plunger 7 in the hollow shaft 1 has a hole 11. To connect with the pillar drill pipe and centered downhole equipment (not shown) the centralizer has a thread 12. The return of the dies 4 and of the piston-pusher 7 in the original transport position occurs through the force of the spring 6 through the pushers 13 (see figure 2), rigidly connected to the conical housing 3.
The centralizer downhole equipment operates as follows. The centralizer is placed directly in front of downhole equipment (extender, resultevent and others not shown) by means of connecting threads 12 (see figure 1). Then on the string of drill pipe of the downhole equipment together with centralizer descend at a given interval in which you want to make the expansion of the wellbore (not shown), a flare or other operations. When this die 4 centralizer hidden in boxes of 10 of the cylinder 9 and do not touch the walls of the borehole due to the force of the spring 6.
After that inside of the drill pipe with the drill is the first pump serves washing liquid and start to rotate the string of drill pipe and downhole equipment. Through the hole 11 in the hollow rod 1 hydraulic fluid transmits the pressure to the piston-plunger 7, is rigidly connected to the conical housing 3, through the "swallow's tail" 5 die set 4. Compressing the spring 6 through the pushers 13 (see figure 2), the piston-plunger 7 performs a longitudinal movement down to the limited compression spring 6 distance, thereby bringing the plate 4 (see figure 3) due to the conical housing 3 at a certain distance in the radial direction, firmly aligning thereby downhole tool relative to the axis of the borehole during operation. The cylinder 9 (see figure 2)in which all movable elements located between the stop 2 of the hollow shaft 1 and the sleeve 8 to rotate relative to the hollow rod 1. As a result of this centering elements do mainly translational motion, rotation of the cylinder 9 is missing due to the presence of friction plates 4 in the borehole, allowing them to remain stationary relative to the walls of the borehole, thereby preventing wear of the dies 4 and increasing the life of the centralizer in General. Once developed the specified interval of the well, the mud pump is shut down, the pressure is released, and the spring 6 returns the die 4 (see figure 1) with a conical housing 3 and the piston-plunger 7 in the original transport polojeniyem tool to raise the wellhead.
This design provides a rigid and reliable centering of the downhole equipment in the required interval, excluding unauthorized actuation, vibration and vibration of this equipment during downhole operations, which together allows quality all work with high working resource of the device.
The centralizer of downhole equipment, comprising a hollow shaft with the clutch cone housing, cylinder, piston-plunger and die made with the possibility of a limited radial extension when moving the cone-beam case, characterized in that the clutch is on the bottom, a hollow stem on the top is equipped with stops, and a cylinder which contains all moving parts, equipped with the Windows under the die and is installed between the clutch and it stops with the possibility of rotation and is in communication with the Central channel of the hollow shaft, while the tapered housing is rigidly connected with the spring loaded bottom of the piston-plunger with the possibility of longitudinal movement down and rotation relative to the hollow rod.
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil producing industry and is designed for generating pressure pulses in drilling agent in drill string and for measurements during drilling. For this purpose the bell of the pulse generator travels up and down to shift drilling agent from pressure reservoir into a chamber of sliding pressure and out of it and along corresponding upper and lower connecting channels. The bell is actuated by means of certain sequence of manipulations performed with solenoids with a bidirectional disk valve. The circular channel of the pulse generator is designed to decrease turbulence of drilling agent flow and to generate practically laminar flow in a pulsation region. A pulse or absence of a pulse is converted into a digit signal transmitted to surface with a pressure sensor implementing algorithm of decoding. Further a signal is visualised by a drill foreman and operators who obtain valid data about direction and geologic formation; these data assist an operator in determining direction of drilling. Additional pulse generators increasing rate of data transmitting can be introduced in the given instrument. Raised velocity of data transmitting facilitates obtaining more thorough information, decreases drilling expenditures and increases yield of oil deposit.
EFFECT: raised information value and reliability of methods and facilities due to insensitivity of facility to flow velocity and pressure; skipping over adjustment during operation; forming recognisable, repeated, reproducible and pure signals of pressure pulses at minimal consumption of power.
37 cl, 4 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: telemetric system sound bottom support includes a bottom sub, an electric module protected jacket and a centraliser. At that the centraliser executed as two co-axial elements with radial connections in between. The centralisers internal element is elongated in comparison with an external one, and in the centralisers internal element top part executed a blind hole along its axis, where an elastic element installed, made of non-magnetic material. The elastic element made of titanium or non-magnetic steel, or bronze, or metal rubber, or rubber.
EFFECT: sound bottom support parts lifetime increase, assembly simplification and its reliability increase, the support spare parts and its assembling work content decrease.
4 cl, 1 dwg
FIELD: metering equipment.
SUBSTANCE: invention is related to survey of underground formations with application of acoustic measurements performed in well. For this purpose body of acoustic logging tool is made as configured for isolation of receiving elements and electronics in acoustic receiver unit against well environment. At the same time body has an interrupted, alternating structure, which acoustically non-transparent in some zones and acoustically transparent in the others. Body may be modular, with several steps joined one to another. Multiple steps provide for the body that may be used with multiple well logging tools for reduction or elimination of noise transfer to receiving elements.
EFFECT: improved efficiency of survey by elimination of interfering signals and provision of adequate mechanical strength of acoustic logging tool.
47 cl, 9 dwg
FIELD: oil and gas production.
SUBSTANCE: invention refers to oil industry and can be implemented at survey of wells. The method of evaluation of static and dynamic levels of fluid in annular space of a well equipped with an electric centrifugal pump includes evaluating of levels by geo-physic methods. Prior to evaluation of levels a hole is made in a face plate. A perforated plastic pipe narrowed in its lower part and secured on external surface of a flow string is lowered together with the flow string and the pump into the well. Bottom of the plastic pipe is arranged 0.5-1.0 m above the pump; an upper end of the plastic pipe comes out to surface through the hole in the face plate. A gap between the plastic pipe and the hole of the face plate is leak proofed; a measuring tape with a level sensor is lowered inside the plastic pipe. Surface of fluid is contacted; a level is measured and the measuring tape is withdrawn out of the plastic pipe.
EFFECT: simplification of measuring procedure of fluid level.
SUBSTANCE: invention relates to mining and is provided predominately for subsurface video surveillance, particularly for implementation of visual verification and automated flaw detection of condition of boreholes. Device for video surveillance of well includes sealed outboard unit with video camera and hermetic enclosure, which contains lamp, unit of secondary current supply, remote sensing unit, unit of input and sealing of hoist cable and electric signals converter. Additionally outboard unit additionally contains radiator, linked to environment, heat-conducting container, into which it is placed video camera and coolant, based on the Peltier effect.
EFFECT: providing the ability of video surveillance of boreholes in conditions of elevated temperature.
2 cl, 1 dwg
FIELD: oil industry.
SUBSTANCE: system consists of upper cable plug (UCP) and lower cable plug (LCP) and a body. At that, UCP is provided with cable cords (CC) uniformly located in a circumferential direction and covered with an insulation material, and plugs without being insulated are installed on CC ends. Body is provided with CC uniformly located therein in a circumferential direction, on top ends of which there installed without insulation and located in the body cavity are tips, and with a gasket with holes for CC. At that, LCP is provided with CC covered with insulation material and uniformly located in a circumferential direction and with a flange wherein two holes for mounting elements are made. In UCP and LCP body insulators with holes for CC are located. Seal rings are located in the joints between UCP and the body along the mating cylindrical surfaces. Body and LCP are provided with seal rings located on their external surface, and UCP is provided with a flange with two holes for mounting elements. Body is made in the form of a shell inside which insulators are located with CC uniformly located in a circumferential direction and equipped with limit stops preventing their axial movement. At the shell bottom there made are holes for CC covered with insulation material for LCP and coaxial relative to CC located in the body. Upper part of the shell is made in the form of a hollow cylindrical sleeve coming out of the flange provided with two holes for attaching the mounting elements and coaxial relative to the holes made on UCP flange. Gasket is located in the upper part of the body and locks insulators, and its holes are made for CC covered with insulation material for UCP and are coaxial relative to CC located in the body, on lower ends of which the tips are installed without insulation. Plugs without LCP insulation are installed on CC ends. Tips are collet-type and are provided with spring rings. All joints of tips and plugs with CC ends are threaded.
EFFECT: providing reliability and efficiency of the system for connecting the submersible electric motor to the power cable on the well's top, protected against action of the well's corrosive medium and delivered to the site with maximum availability.
FIELD: oil and gas industry.
SUBSTANCE: invention refers to geo-physical surveys of wells and can be implemented at assembly of well apparatus of telemetry system. The unit consists of an internal threaded bushing and of thrust half-rings. The unit also contains a nut-fairing and a profiled bushing with a flange; on the end of the profiled bushing there are made lugs, while response slots are made on the internal threaded bushing. Also one of the lugs of the profiled bushing is thickened in radial direction, while a module, whereon bushings are assembled, has a slot and a circular groove for the thickened lug; an orienting slot is cut on the flange of the profiled bushing; the response lug entering the orienting slot is made on the end of the second module.
EFFECT: upgraded reliability of assembly modules of telemetric system and improvement of its consumer characteristics.
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil industry and can be implemented at operation of oil wells, where depth electric centrifugal pumps are used as cable inlet of high pressure. To achieve the said, the cable inlet is equipped with two sealing packages. One of the packages consists of a complex back-up plate, of a solid cone seal and of a complex packing washer. The second sealing package consists of a complex back-up plate, of a solid cylinder seal and of a complex packing washer. The cable entry with double sealing package is equipped with two bearings installed on each sealing package. A case is equipped with two channels for pressurisation of the cable inlet with double sealing package; the channels are located between sealing packages and are equipped with two plugs installed in these channels.
EFFECT: facilitating control over pressure tightness of cable inlet during operation, simplified installation of cable inlet, also possibility to use cable inlet for existing well stock.
FIELD: oil and gas industry.
SUBSTANCE: invention refers to equipment for well head pressurising and can be implemented at geophysical survey in horizontal wells with excess pressure at well head by means of geo-physical instruments connected to flow string of small diametre and lowered into well on geo-physical cable together with flow string. When instruments and pipes pass through the well head, pressurising is performed by means of a tube preventer and pipe pressurising facilities. When the geo-physical cable passes through the well head, well head pressurising is performed by means of a cable preventer and attached lubricator. Transition from pressurising with one elements of equipment to pressurising with other elements of equipment is carried out using a special three-coupling branch, arranging it so, that closed die-heads of the pipe preventer are located between two lower couplings of the branch, while the upper coupling is located above an upper flange of pipe pressurising facilities.
EFFECT: expanding functionality at performing survey of horizontal wells and increasing reliability of well head pressurising in process of survey.
5 cl, 3 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to well survey and can be used for borehole cable (BC) geophysical instruments (GI) moving-in to boreholes of inclination angle exceeding 50 degrees. Shielding container fixed on the end of drill column (DC) containing number of drill pipes with upper and lower sectors of DC is lowered. GI is lowered on BC into the borehole. Herewith after drilling to preset depth is complete, DC is lifted to the beginning of intensive borehole crookedness. Upper pipe is disassembled, while lower pipe contains mounted lower module with provided GI with packer neck. Upper pipe is mounted on lower module thereafter lowered to preset depth. GI running is performed on one-piece BC. After running is complete, upper module is mounted above upper pipe of DC. Modules are designed as pipes widened to lateral part of casing pipe thus providing free passage for BC between upper pipe of DC and casing pipe. The shielding container represents a magnetic trap of internal boom drift diameter greater than that of DC, and consists of the case. Lower side face of the case contains a magnet, while lower end side includes wash wire guard.
EFFECT: possibility to run GI on one-piece BC without complete rigging-down required.
2 cl, 2 dwg
FIELD: oil-and-gas production.
SUBSTANCE: downhole chamber contains hollow casing connected to end top and bottom nozzles, allowing longitudinal channels for connection of chambers to pipes located in hollow casing guide ways, helical surface for orientation of valve relative to pocket, operating for its location in chamber and allowing cross channels, communicating inner cavity of pocket to space, enveloping chamber, herewith helical surface for orientation of valve is implemented on bottom butt of top nozzle so, that its external surface contacts external surface of mounting hardware of top nozzle to hollow casing in point through which pass plane of longitudinal section of chamber, inner pass of helical surface is implemented co-axial to longitudinal channels of top and bottom switchers, and hollow casing is separated by solid insert, which is implemented with additional channel, located co-axial to longitudinal channels of end nozzles of chamber, and parallel to it channel of less cross-section, in which it is implemented pocket for valve, herewith in walls of channel of less cross-section there are implemented cross channels, axis of cross channels, placed in plane of cross-section of solid insertion, form to each other blunt angle, and solid insertion is implemented with two side hollows, at that one of vertical walls of each side hollow forms one of external walls of channel of less cross-section, and other vertical wall - is parallel to axis of cross channels, to which it is communicated particular side hollow.
EFFECT: reliability enhancement of operation of downhole chamber.
4 cl, 4 dwg
FIELD: oil field development, particularly to deliver different equipment in well bore.
SUBSTANCE: split bush comprises at least one leaf to be pressed out and guiding extension connected to the leaf. The bush also has locking profile formed from outer bush side. Method for split bush usage involves arranging at least two guiding profiles with selectively mating aligning profiles in liner; inserting split bush having guiding extension and locking profile corresponding to aligning profile in the liner; orienting split bush by moving guiding extension resting upon guiding profile and bringing thereof into engagement with aligning profile if it mates locking bush profile.
EFFECT: increased accuracy of equipment alignment inside well.
26 cl, 7 dwg
FIELD: oil and gas production equipment, particularly for arranging different tools is borehole.
SUBSTANCE: chamber comprises body with directing nipple arranged in upper body part and pocket. Body is composed of bearing and guiding tubes connected one to another along interface line on outer surfaces thereof. Bearing tube has longitudinal orifice having one part mating guiding tube along side surface having longitudinal orifice. Connected bearing and guiding tubes form figure-eight defined by cross-sections along outer peripheries thereof. Pocket has outer diameter equal to that of guiding tube and connected to lower end thereof to close medium part of longitudinal orifice made in bearing tube. Pocket and bearing tube are connected one to another along longitudinal orifice. Outer surface of the pocket closing above orifice is coupled with inner surface of bearing tube so that round cross section is created. Inner diameter of bearing tube is equal to that of directing nipple. Inner diameter of bearing tube above pocket exceeds that of bearing tube in pocket installation area and is equal to outer diameter of directing nipple. Facet is made in transition area between larger inner diameter of bearing tube and lesser one and distance between lower point of directing nipple and the facet is equal to double length of guiding means for installing or removing borehole equipment in chamber pocket. Chamber is provided with upper and lower heads arranged from lower pocket end and upper guiding tube end and installed along longitudinal bearing tube orifice. The heads close upper and lower orifice parts correspondingly so that through channel is formed. The channel extends between bearing tube and inner pocket channel. Width of lower and upper head cavities is not less than the lesser diameter of inner pocket channel. Inner pocket channel has orifices made in pocket wall to communicate the pocket with hole clearance of the chamber.
EFFECT: increased operational reliability.
FIELD: mining industry.
SUBSTANCE: blocking assembly for blocking outer tubular element with inner tubular element passes through outer tubular element and contains blocking frame, connected to one tubular element and made with recess, directed towards other tubular element and having at least one side surface bent inwards. Blocking element is positioned between tubular elements with blocking connection to other tubular element and mounted with possible passing into recess and action between retracted state, in which blocking element is moveable relatively to recess, and extended state, in which blocking element is extended to side surface bent inwards. Drive for extending blocking element in recess to side surface bent inwards is enclosed. Blocking element includes first portion and second portion, having opportunity to rotate relatively to first portion around the rod, passing in circular direction, and is mounted with possible effect between retracted state and extended state via rotation of said portions relatively to each other.
EFFECT: higher reliability.
10 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas producing industry, particularly to devices for attaching process facilities of external equipment to pipe string lowered into well. The stop devise consists of a coupling in form of a ring with internal circular groove and radial openings for receiving a stop element into the groove; the stop element is made in form of a one-side wedge with fixing ribs triangular in cross section. Also in cross section the circular groove of the coupling is made in form of arc and exceeds in width the radial opening located in the middle of the groove. Surface, opposite to inclined plane of the wedge, in cross section is made in form of arc with radius smaller, than radius of the circular groove of the coupling to a value from 2 to 5 %. The stop wedge has a recess at a thickened end of the wedge with an arc-shaped in section side; width and length of the side do not exceed 20% of corresponding dimensions of the wedge. Radial openings for insertion into the groove of the stop element coupling are cut at 45÷90° to a generating line of external surface of the coupling.
EFFECT: upgraded reliability of stop device operation due to increased trigger force.
4 cl, 5 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: centraliser for additional casing string cementation inside of a main casing string, includes cylindrical case with blades, fixed with fixers on its surface and equipped with top and bottom cants. The cylindrical case executed as a pipe of the additional casing string, and fixers as a top and a bottom rings with conical external surfaces, interacting with blades cants and stiffly fixed on the pipe. The centraliser manufacturing method includes the cylindrical case with blades manufacture, and its installation between sleeves as a part of the additional casing string, at that the cylindrical case made as a pipe of the additional casing string, and install blades with the top and bottom cants on the pipe surface, clamping blades cants from the top and the bottom with the fixer rings conical surfaces, which are stiffly fixed on the cylindrical case surface, after that fix it between the additional casing string pipes. The centralizer for additional casing string centralising inside of a main casing string and its manufacture method allows decrease metal consumption, because the pipe of the additional casing string used as the cylindrical case, and centralizers crosscut profile area decrease allows to use them as a part non-sleeved additional casing string , keeping well pas through diametre at a large.
EFFECT: centraliser's blades dislocation on the pipe itself increase between blades channels throughput capacity, which allows to decrease pumping in cement flow resistance and increase cementation quality.
2 cl, 2 dwg
SUBSTANCE: invention refers to support and centering devices used in arrangement of drill column bottom at directed drilling of oil and gas wells. Well shaft calibrator includes upper and lower connection thread, internal channel for feeding flushing liquid to bottomhole, three or more blades with reinforced working surfaces separated from each other with flushing slots, and blade length L in it is related to working diametre of calibrator Dc with the following ratio: L/Dc=(0.7÷0.95). As reinforcing material for blades there used are plates made of polycrystalline diamonds (PDC) with flat external surface, which are installed flush with operating surface, and total area of reinforcing plates S1 is related to operating blade area S2 with the following ratio: S1/S2=(0.34÷0.48). External flushing channels between blades are uniformly extended along sectional area due to inclination of leading cutting edge at an angle α=(18°÷23°) clockwise to generatrix of calibrator cylindrical part, and trailing edge is made along generatrix of cylindrical part; at that, there provided is ratio of areas of space between bottom of channel and overall line of calibrator at channel outlet S4 and at channel inlet S3 within the following limits: S4/S3=(1.37÷1.52). Curved surface of flushing channels is smooth without passages and protrusions with unevenness Ra=(1.0÷4.0) mcm.
EFFECT: increasing manoeuvrability at drift angle of well, decreasing packing at directed drilling of viscous and sticky rocks.
4 cl, 4 dwg
FIELD: oil-and-gas production.
SUBSTANCE: invention related to casing string hole clearance cementing , particularly cementing casing string in a well. Hydro-mechanical anchor centraliser, includes cylinder connected to string, inside which installed 3 barrels, working piston, fixed relatively to cylinder with calibrated pin, slide barrel, centralising arms, roller fixed with string, lockers, executed as a T-shaped channels on the barrels bottom, interacting with T-shaped pins, stiff fixed with centralising arms. Slide barrel installed inside cylinder cavity over barrels. External diametre of slide barrel is smaller than cylinder internal diametre. External surface of working piston bottom part made conical for interaction with centralising arms conical surfaces. On the top part of working piston before its conical surface made diametrically opposed gaps, in a way that its bottom part has radial through pins, created along working piston generating line in pins between centralising arms. Core stepped created along external working surface has radial holes with thread, connecting cylinders and core internal surfaces, destroyable plug threaded in it.
EFFECT: anchor centraliser reliability increase and its simplification.
FIELD: oil-and-gas production.
SUBSTANCE: invention related to casing string hole clearance cementing , particularly cementing casing string in a well. Hydro-mechanical anchor centraliser, includes cylinder connected to string, inside which installed 3 barrels, executed as half barrels, connected in pair with each other via seals, working piston, installed under barrels and executed as half barrels, stiff fixed in a conical part, centralising arms, roller fixed with string, lockers, executed as a T-shaped channels on the barrels bottom, interacting with T-shaped pins, stiff fixed with centralising arms top ends, destroyable plug, installed in radial hole with thread, connecting internal cavities of cylinder with string, stepped executed along its external working surface, slide barrel with conical external surface on its top part for interaction with cylinder internal conical surface and radial hole, located under conical surface, installed over barrels and on bigger diametre of the string inside cylinder internal cavity with possibility of radial hole closing with it after anchor centraliser actuation and executed along external diametre, less tha cylinder internal diametre, and actuation, fixed relatively to cylinder working barrel, and on the bottom part of working barrel along generating line radial pins executed in gaps between centralising arms.
EFFECT: anchor centraliser reliability increase.
FIELD: oil-and-gas production.
SUBSTANCE: group of inventions related to oil-and-gas production, particularly to pump stem centralising guiding devices. Stem guide consist of case, made of two connecting elements and sleeve, located around first and second case elements in stem pick up position between loaded arms of the first and second case elements arms. Also first and second case elements have external wear surface for sliding contact with sleeve internal wear surface, and at least one external and one internal accordingly for the first and second elements conical surfaces, narrowing radially along axes for loking to each other during device case installation on the pump stem core.
EFFECT: efficiency increase in device connection to pump stem and enhancement.
27 cl, 9 dwg