Lubricating system for wells
FIELD: oil and gas industry.
SUBSTANCE: lubricating system for wells consists of lubricator, lubricator substructure and rotation mechanism. Lubricator is designed as tubular housing with guide rollers, the housing base is provided with sealing element. On lubricator substructure there is mounting block fixed with rotation mechanism installed on it being a driving shaft. Attachment facilities for middle part of lubricator tubular housing are installed on the shaft, as well as segment of worm wheel connected to worm screw, which in its turn is connected to device providing rotation of worm screw. Worm screw is designed with narrow angle of spiral line elevation providing mode of worm-and-worm pair self-retention, and rotation axis of worm wheel segment is located perpendicular to rotation axis of worm screw and at a distance from axis of lubricator tubular housing exceeding 0.5 d, but not more than 1.5 d, where d is outer diameter of sealing element of lubricator tubular housing base.
EFFECT: simplifying the structure and its assembly, simplifying operation of lubricating system, improving its reliability.
The invention relates to the field of oil and gas production and can be used for lowering or lifting devices, and devices for special purposes in the well, including under excessive pressure gas or liquid.
Known the force feed system for wells, consisting of a lubricator, the support base of the lubricator, and the swivel mechanism is made of two lever arms connected to the worm screw (RF Patent 2279541, the patentee is Society with limited liability "Nadymgazprom", publ. 10.07.2006).
The disadvantages of the known technical solutions are insecurity complex, due to the uneven distribution of mass of the lubricator, the inability to use the lubricator long length and large diameter, the bulkiness of the swivel mechanism, as well as the structural complexity of the complex.
The technical result, which directed the present invention is to simplify the design and Assembly, which is carried out directly at the installation location before beginning work in wells, simplifying the operation of the lubricator complex, and increase its reliability.
The technical result of the invention is achieved due to the fact that the force feed system for wells, status of the t of the lubricator, the support base of the lubricator and the rotary mechanism, and the lubricator is made in the form of a tubular casing with guide rollers at the base of which is a sealing element, for supporting the base of the lubricator mounted to the mounting rack, which is equipped with a turning mechanism, a leading shaft attached to it by means of fixation of the middle part of the tubular body of the lubricator, as well as a segment of a worm wheel, paired with the worm screw, which, in turn, is associated with means enabling rotation of the worm screw, when the worm screw is made with a small elevation angle of helix, providing a mode-locking worm gear pair, and the axis of rotation of the worm wheel segment is perpendicular to the axis of rotation of the worm screw, and at a distance from the axis of the tubular body of the lubricator, greater than 0.5 d, but not more than 1.5 d, where d is the outer diameter of the sealing element of the Foundation of the tubular body of the lubricator.
The essence of the invention is illustrated by drawings, where figure 1 shows the force feed system for wells, and figure 2 - rotary mechanism lubrication of the complex.
The force feed system for wells consists of a lubricator 1, the support base Assembly 2 and the rotary mechanism 3. Lubr the indicator 1 is made in the form of a tubular body 4 with the upper and lower guiding rollers for the wire 5 and 6, respectively.
The tubular body 4 lubricator system is designed to accommodate depth of the equipment prior to its descent and before removing it from the well, placing the upper and lower guide rollers 5 and 6 for the wire, as well as devices for input wire 7. The tubular body 4 may be made of a single tube or multiple separate sections, connected to each other with quick couplings or clutches (not shown). The input device wire 7 lubricator complex is intended for entry of the wire into the tubular body 4, and for seals. The upper guide roller 5 is intended for a direction of movement of the wire along the tubular body 4 in the input device of the wire 7. The lower guide roller 6 is intended for a direction of movement of the wire from the winch (not shown) to the upper roller 5 and reduce bending effort on the tubular body 4 of the wire tension during the ascent.
The upper part of the tubular body 4 ends with thread or flange (not shown) for connection with the device input wire 7 in the tubular body 4 lubricator complex.
The lower part of the tubular body 4 is made in the form of a connecting element 8 (flange or threaded connection). At the base of the tubular body is a sealing element is 9 in the form of soft or hard strip. Flange or screw connections are used to connect the tubular body 4 with a support base of the lubricator 2.
Supporting the base of the lubricator 2 is a mounting coil, consisting of a coupling element in the form of upper and lower flanges 10 and 11, respectively, or a threaded connection (not shown). The support base Assembly 2 is intended for installation lubricator complex on the flange of the buffer x-Mas tree valves (not shown) and the mounting rack 12. The lower flange 10 of the mounting of the coil on the side surface has a hole for fitting and ball valve for connection showing the gauge and periodic, if necessary, bleed the gas from the cavity of the tubular housing 4 lubricator complex in operation.
The mounting bracket 12 serves as a support for rotation of the tubular body 4 lubricator complex (tipping tubular casing lubricator complex from a vertical to a horizontal position and Vice versa). The mounting bracket 12 is a structure made of metal profile, and has a bottom base (not shown)that is attached to the lower flange 10 or to the flange of the buffer valve (not shown), and an upper support platform for mounting of the swing mechanism 3.
The rotary mechanism 3 pre is scheduled for fastening the tubular body 4 and the deviation of its relatively vertical position. The rotary mechanism 3 is a drive shaft 13, which is fixed to fixation means 17 middle part of the tubular body of the lubricator, for example metal plates attached to them by the collar and the segment worm wheel 14 is mated with the worm screw 15, which, in turn, is associated with the tool 16, which provides the rotation of the worm screw. As a means 16 providing rotation of the worm screw may be used to arm or adjusting the key switch.
To use a lubricator remove the buffer from the buffer valves wellhead equipment of the well (not shown). Assemble blocks lubricator complex (lubricator, supporting the base of the lubricator and the mounting bracket with swivel mechanism). Install mounting the coil on the flange of the buffer valve. On the lower flange 10 of the coil mounting set mounting rack 12. At the top of the mounting rack 12 fixed pivot mechanism 3. Installing a tubular housing 4 flange (coupling element 8) on the top flange 11 of the mounting of the coil. Fix the tubular body 4 in the clip (the fixation device 17) of the rotary mechanism 3. Translate the tubular body 4 in an inclined or horizontal position, convenient for subsequent work by turning the handle or key of Cresotech the first rotary mechanism. Fixed on the tubular body 4 of the upper and lower guide rollers 5 and 6. Put the wire from the winch first through the bottom 6, and then through the upper guide rollers 5.
The end of the wire passed through the hole of the input device, the wire 7. Deep unit (not shown) is placed in the tubular body 4. The inclination of the tubular housing 4 by turning the handle or ratcheting wrench through the worm pair (worm screw worm wheel segment). Install the flange of the tubular body for mounting the coil. Using the winch lowered the instrument in the borehole to the desired depth. Upon completion of work, raise the device from the well. Block buffer gate valve, gate valve at the side strings of x-Mas tree, release the gas through the ball valve (not shown). Sever the flange connection of the tubular housing and the mounting of the coil. Translate the tubular body 4 in the horizontal position using the rotary mechanism 3 after disconnecting the flange 8 of the tubular housing from the mounting of the coil. Take a deep unit from the tubular housing. Disconnect the wire from the device, remove the device from the tubular body 4. Produce disassembly lubrication complex to the blocks in the reverse order of installation.
We offer the force feed complex is structurally simple. The implementation of the s complex in the form of separate blocks (lubricator, supporting the base of the lubricator and the mounting bracket with swivel mechanism) simplifies its Assembly, which can be done directly at the installation location before beginning work in wells, which, in turn, will simplify the operation of the lubricator complex.
Also the simplification of the operation of the system is through the use of a swivel mechanism to effect the worm gear, which allows us to reject the lubricator in a position convenient for placing devices, putting minimal stress on the tool that provides the rotation of the worm screw turning mechanism, for example, on the handle.
Thus the performance of the worm screw with a small elevation angle of the helical line (not more than 4.5°), which provides the mode-locking worm pairs, allows the rotary mechanism to fix the lubricator in the deflected position without the use of additional mechanical clamps, which also simplifies the construction of the lubricator complex.
The use of the claimed lubricator complex with swivel mechanism, which unlike the prototype captures tubular diameter in its middle part, provides a balance relative to the center of gravity of the lubricator, which, in turn, will allow the use of the lubricator of any length and any diameter also the location of the axis of the tubular body of the lubricator at a distance from the axis of rotation of the segment worm wheel turning mechanism, greater than 0.5 d, but not more than 1.5 d, where d is the outer diameter of the sealing element of the Foundation of the tubular body of the lubricator, allows you to translate the tubular body of the lubricator in a vertical position, not touching this extreme part of the sealing element mounting the coil and smoothly without clearance to install the flange of the tubular body for mounting the coil. In the result, there is no need for bulky rotary mechanism that facilitates the construction of a lubricator complex, and more reliable lubrication of the complex.
The force feed system for wells, consisting of a lubricator, the support base of the lubricator and the rotary mechanism, wherein the lubricator is made in the form of a tubular casing with guide rollers at the base of which is a sealing element, for supporting the base of the lubricator mounted to the mounting rack, which is equipped with a turning mechanism, a leading shaft attached to it by means of fixation of the middle part of the tubular body of the lubricator, as well as a segment of a worm wheel, paired with the worm screw, which, in turn, the SOP is Agen tool, ensure the rotation of the worm screw, when the worm screw is made with a small elevation angle of helix, providing a mode-locking worm gear pair, and the axis of rotation of the worm wheel segment is perpendicular to the axis of rotation of the worm screw, and at a distance from the axis of the tubular casing lubricator is greater than 0.5 d, but not more than 1.5 d, where d is the outer diameter of the sealing element of the Foundation of the tubular body of the lubricator.
FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to oil and gas producing industry, namely to the method of equipment delivery to the specified interval of multi-hole well and device for its implementation. In the course of method implementation the deflectors oriented from the well mouth are installed at the column of tubing, the equipment is lowered to the specified interval of the well and is delivered from column of tubing to the side hole in condition of closed access to the tubing interval located below or the equipment is lowered to the tubing column interval located below in condition of closed access to the side hole. The deflector installed at tubing is used as device. Deflector consists of hollow rotating housing equipped with lateral window and guiding element that provides coiled tubing passing to the side hole of the well or tubing interval located below.
EFFECT: due to the elimination of necessity to draw tubing column in advance the treatment and geophysical researches performance in multi-branch wells is simplified.
4 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: automatic coupling unit is equipped with the cylinder connected to hook sleeve, and a spring. Guide and mating parts are provided in the cylinder with possibility of engagement with the hook sleeve. The latter is installed on the contact housing fixed in the housing representing a cylindrical part so that sleeve is pressed to the housing by means of a spring. At that, fluoroplastic insulating tube and a pin is installed in the contact housing. Pin is connected to cable clamp connected to the first cable head by means of logging information cable. Measuring instrument is suspended on the cable which is connected to non-return valve. Cylinder is fixed on the second cable head.
EFFECT: enlarging functional capabilities owing to performing the investigation without stopping the well by automatic coupling unit; improving its reliability.
FIELD: oil and gas production.
SUBSTANCE: electronic module of bottomhole telemetric system consists of switchboard, of protective jacket, and of electronics chassis with converters unit mounted on vibro-isolators on both sides and fixed with pins from turning. Between the said chassis there is introduced an additional vibro-insulator. The said vibro-insulators are arranged on set bushes fixed with screws from turning and they are equipped with an up-thrust nuts. Internal surface of the protective jacket in upper and lower sections is made correspondingly with upper and lower slots oriented in one plane. A lower section of the protective jacket is equipped with an end in form of a bush with a screw set in the lower slot and with an element for extracting the protective jacket of the electronic module from the case of the bottomhole telemetric system. An upper part of the protective jacket is connected to the switchboard by means of successively set the nut and the bush with a pin installed in the upper slot. Additionally the chassis with the converters unit is furnished with additional vibro-insulators.
EFFECT: reduced detrimental effects of impact and vibration loads on electronic modules of downhole instrument.
SUBSTANCE: device comprises geophysical cable, facility of transportation, connected to hydraulic rupture facility. According to invention, transportation facility is arranged in the form of hydraulic propeller connected by common shaft to drive and high-voltage generator, installed inside closed sealed vessel. This vessel is in its turn installed inside jacket with formation of circular gap. At the same time high-voltage generator is arranged with piezoelectric plates.
EFFECT: improved efficiency of hydraulic rupture by increasing efficiency of perforation facility delivery, intended for hydraulic rupture of beds into horizontal or inclined well.
FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil industry and can be applied in dual operation of two beds in the same well. The unit comprises a power drive, a driving element, a packer and fluid lifting lines with parallel tubing string columns lowered in the well. The unit accommodates a parallel anchor with apertures for cables and tubing string columns, eccentric guides fixed by centering clips on auxiliary branch built in the long tubing string column, bottomhole apparatuses connected to cables and arranged above and below the packer. Each guide has apertures for the cables and an aperture with the top deepened inside in the form of a funnel for the short tubing string column.
EFFECT: invention ensures coupling of the short tubing string column with the parallel anchor and prevents damage of cables.
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.
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.
FIELD: oil and gas extractive industry.
SUBSTANCE: method includes selection of cable of required rigidity and fixing devices on it. Transporting of devices into well is performed under effect from weight of cable and devices. Cable also contains inner hermetic pipe, which is plugged on both sides prior to lowering cable into well. Liquid is pumped into pipe under pressure through locking valve in upper plug and is kept in pipe under constant pressure during operation. After that cable is lowered with devices fixed to it. Value of pressure of liquid in pipe is determined from formula Ppipe≥ Pwell(Scable/Spipe-1)-QcablexLcable/Spipe<Ptear, where Ppipe - pressure of fluid in pipe, kg-wt/sm2; Scable - cross-section of cable with pipe, sm2; Pwell - hydrostatic pressure of well liquid column at depth of planned delivery of devices on cable, kg-wt/sm2; Spipe - cross-section area of pipe aperture and plug area equal to it in contact with liquid in pipe, sm; Qcable - weight of 1 km of cable with pipe, kg-wt; Lcable - length of cable to depth of planned delivery of devices, km; Ptear - pressure of liquid in pipe leading to tear of cable, kg-wt/sm2, determined from formula: Ptear=Ftear/Spipe, where Ftear - tear force for cable according to documentation, kg-wt.
EFFECT: higher efficiency.
3 cl, 1 dwg, 1 tbl
FIELD: oil and gas industry.
SUBSTANCE: device is made with possible use in conjunction with scraper for removal of paraffin precipitations. Device includes end piece for connection to well device and metallic rod with variable cross-section. Rod is made in form of at least three serially placed truncated cones. Cones have double relation of greater diameter to lesser diameter.
EFFECT: higher efficiency.
4 cl, 2 dwg
FIELD: oil industry.
SUBSTANCE: all equipment-hoisting operations are performed during underground well maintenance prior to lowering pumping equipment. Equipment is mounted in tail piece lowered into well. After extraction of pumping equipment from the well, end piece with closed end is lowered, having calculated length, dependent on depth of perforation range. Then specially made branch pipe is lowered into well with slit outlet for geophysical cable. Branch pipe with slit outlet is rigidly connected to pipe pumping filter. Then equipment is lowered into tail piece in such a way, that geophysical cable was inserted through slit outlet into behind-pipe area of well. Further, pumping equipment is lowered, including tubing string, well sucker-rod pump and bars column suspension. In such a way, equipment is effectively positioned in tail piece, and connection to secondary equipment is maintained through geophysical cable, connected to tubing string by braces.
EFFECT: higher safety.
FIELD: mining industry.
SUBSTANCE: device has post with mounting holes along circle, forks with aperture for holding fork relatively to post, roller and stopper. Upper portion of post and lower portion of fork are made in form of disc, are combined by axes and have mounting apertures along even circle along axis in a way, that angle between post apertures was different from angle between fork apertures.
EFFECT: higher durability, higher precision, higher efficiency, broader functional capabilities, higher personnel and equipment safety.
1 ex, 3 dwg
FIELD: survey device to survey wells during drilling and operation, particularly to unite modules during cooperation thereof.
SUBSTANCE: device comprises body including two parts and ball finger. The ball finger has spherical surfaces mating upper body part. The ball finger is fastened by pressing nut. Lower part of ball finger is screwed in lower body part to which sleeve performing limited axial movement is connected. The sleeve movement is limited by retaining nut. Uniting device air-tightness is provided by sealing ring and pressing nut installation.
EFFECT: increased degree of uniting device movement freedom, improved air-tightness.
FIELD: drilling equipment, particularly cable television system used to perform navigational control of directional and horizontal oil and gas well drilling from ground surface and to guide borehole cable rope from inner cavity out of drilling string.
SUBSTANCE: sub comprises threaded connection pipe with thrust end, body with straight and peripheral inclined channels, bush and annular sealing member arranged in straight body channel. Straight body channel is central and provided with cup with inner and outer longitudinal grooves. The bush is installed so that the bush may cooperate with thrust end of threaded connection pipe and has longitudinal extensions arranged in inner longitudinal cup grooves. Annular sealing member comprises extension having orifice and cut for cable introduction into the orifice. The extension is arranged in peripheral inclined channel of the body. Safety means formed as reinforcing member facing straight channel and as elastic member with orifice and cut for cable introduction and arrangement is installed at inclined channel inlet.
EFFECT: increased service life, ease of sub operation and repair.
3 cl, 4 dwg
FIELD: earth and rock drilling, particularly means for transmitting measuring-signals from the well to the surface.
SUBSTANCE: method involves spooling communication element on a reel; connecting the first end of the communication element to the first user at the first end of the pipe assembly; moving the communication element inside the pipe and connecting the second end of communication element to the second user arranged at the second end of the pipe assembly. The communication element is moved in several stages simultaneously with pipe assembly enlarging or disassembling by displacing the reel inside a pipe under force applied to the reel from the second pipe end and with simultaneous winding or unwinding of the communication element for length equal to reel displacement distance without communication breakage. Continuous communication is provided by linking of the second end of communication element to the second user through traction member during reel displacement or through parallel channel to be temporarily linked up during traction member movement without the reel, which is fastened to pipe assembly at the second end thereof. During pipe assembly enlargement communication element having length exceeding pipe assembly length is provided. The communication element is spooled on the reel. Traction member is inserted in the pipe to be connected and the reel is moved from the first pipe end to the second end thereof. During pipe assembly disassembling the reel is pushed in reverse direction. Device for above method realization includes lifting mechanism and reel. The reel comprises body in which frame with communication element wound on the frame is installed so that the first end of the communication element is provided with means to connect thereof to the first pipe assembly and the first connector to link thereof to the first user. The second end of the communication element is fastened to the reel frame and has the second connector to link thereof with the second user. The device is provided with traction member having length exceeding length of each separate pipe and having members to connect thereof with lifting mechanism from one side and with the reel from another traction member side. The device also has additional branch of communication member to connect the second reel connector to the second user through lifting mechanism. The reel has sealed body and fastening members to secure the reel to the pipe. Outer transversal dimension of the reel body does not exceed inner diameters of pipes included in the assembly. The lifting mechanism has control unit connected with reel body by above communication element branch through traction member.
EFFECT: provision of continuous communication between well head and well bottom during drilling string assembling or disassembling.
17 cl, 2 dwg
FIELD: oil and gas industry, particularly devices for well survey and oil or gas sample taking.
SUBSTANCE: method involves lifting lubricator; inclining lubricator through 40-45° to vertical line and retaining thereof in inclined position during bottomhole apparatus insertion; lowering lubricator in well and vertically installing thereof on connection unit of well production tree. The simultaneous lifting, inclination, retaining, as well as simultaneous lowering and installation operations are carried out with the use of mechanism. The mechanism comprises two cantilever arms connected one to another by worm gear type screw adapted to bring together and pull apart above arms under handle rotation.
EFFECT: extended possibilities of well survey in difficult-to-access areas characterized by severe climate and geographical environment without the use of hoisting equipment, increased efficiency or work performance due to reduced costs and decreased time of technological operation performing.
FIELD: oil industry, particularly to perform running wells provided with flow strings and sucker-rod pumps.
SUBSTANCE: method involves stopping rocker-machine operation during work performing at well head and sucker-rod pump operation for not more than 20 min; lowering instrument into well; lowering instrument connected to logging cable through cable head for 2 meters; bringing rocker-machine in operation and continuing instrument lowering in well; repeatedly brining sucker-rod pump in operation up to working level reaching during instrument lowering and after instrument lowering; performing survey during sucker-rod pump operation when sucker-rod pump reaches working mode of operation; lifting the instrument to well head after survey termination; stopping the tool at height spaced 100 meters from well head; bringing rocker-machine and sucker-rod pump out of operation; removing the instrument from well and repeatedly bringing rocker-machine and sucker-rod pump in operation.
EFFECT: increased operational reliability due to prevention of logging cable loop forming about flow string and increased reliability of survey results due to measurement performing in working well operation regime.
FIELD: oil industry, particularly to connect to or disconnect electric submersible pump cable from ground-based station cable.
SUBSTANCE: well head system comprises upper cable module with coupling nut, connector and lower cable module with flange. Above components are provided with isolation means with orifices for cable cord receiving and sealing rings arranged along mating cylindrical surfaces in connection areas between upper and lower cable modules and connector. The connector is made of flexible cable and is provided with cylindrical body arranged in upper flexible cable part. The body has tread and cavity defined by partition and inner conical surface with thread. The partition has orifices to receive cable cords covered with insulation material and uniformly distributed along a circle. Collar with outer conical surface, gasket having orifices to receive covered cable cords uniformly distributed along a circle and threaded bush with central orifice are arranged in cylindrical body interior. Bush with cavity defined by partition and inner threaded conical surface is located in lower cable part. The partition has orifices to receive cable cords covered with insulation material and uniformly distributed along a circle. Collar with outer conical surface, gasket having orifices for cable cords uniformly distributed along a circle receiving and threaded bush with central orifice are located in above bush interior. Interiors of the cylindrical body and the bush are filled with compound located between gaskets and armored cable ends. Lower cable unit interior has structure similar to upper connector part structure. Upper cable unit interior has structure similar to lower connector part structure.
EFFECT: possibility of safe well head system installation on domestically produced production trees.