Method of delivering equipment at coiled tubing to specified interval of multihole production well and device for its implementation

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

 

Group of inventions relates to the oil and gas industry and is designed for running logging tools and/or tooling when performing geophysical works and processes in multilateral producing wells.

The known method of repair works in well with the use of cable technology, providing the descent on a wire, rope, cable equipment in the desired interval of the well [1]. When this exercise descent equipment for repair, supply of chemicals, research wells.

The disadvantage of this technical solution is more complicated and often failure in the delivery of equipment in directional wells, the inability to change the position of the equipment in the well during its operation, resulting in the need to stop the operation of the well.

There is a method of delivery of the equipment in the desired interval of the well [2], including accommodation and descent of the equipment on the wire, or rope, or load-carrying capillary tubing, or logging cable in a continuous pipe smaller than the tubing (tubing), diameter, fixed on the outer surface of the tubing. Continuous pipeline down together with tubing, and relocation is not the reading of the pipeline is carried out by means of hydrodynamic pressure supplied into a continuous pipeline of liquid or gas.

The disadvantage of this method is that it cannot be used for geophysical research and technological operations in sideholes multilateral wells.

The closest to the technical nature of the claimed invention is a method local GIW [3], including the descent of geophysical instrument at a specified interval on a long flexible collar without coupling the pipe to the tubing through installed on the packer, the cutting of the upper cavity from the investigated area of the wellbore.

The disadvantage of this method is that it cannot be used for geophysical research and technological operations in sideholes multilateral wells.

A device for the delivery of logging tools in horizontal wells [4], containing mounted on the wireline above the geophysical instrument goods made of separate sections, which represent the pressurized elements of the flexible hose, filled the weighted fluid and hydraulically interconnected, with each element of the flexible hose is rigidly fixed wireline logging, missed inside elements of the flexible hose.

A disadvantage of the known device is that using opasnostbyu cannot apply the object side in the trunk of multilateral wells, it can operate in an inclined or horizontal, but a single well.

It is also known a device for delivery of the object in the sidetrack multilateral wells [5], ensures the delivery of the object in any barrel multilateral wells with determination device in the direction of the shaft and its level relative to the wellhead and transporting containing body with a mechanism for changing the direction of movement. It is also equipped with a snap-locking mechanism made in the form of a cylinder placed in it and spring-loaded in a radial direction stops, the prisoners in the control bushing levels. The snap-locking mechanism through a rotation mechanism connected to the search engine and separation, which has two shoulders lever, a spring-loaded rod, lock end and cooperating inclined plane. The upper surface is rigidly connected with the mechanism of the change of direction, and the lower housing spring-loaded rod. The mechanism of the change of direction is made in the form of a guide pipe, which interacts with an elastic element installed on the device. The guide pipe upper end pivotally connected with the object, but the bottom - lock end. In addition, it has a spring-loaded slider end surface is e which forms the upper inclined plane. Castle separation represents the hooks, the upper of which is rigidly connected to the guide pipe, and through the bottom of the spring cooperating with the spring loaded rod to search and separation. The rotation mechanism is made in the form of a cylinder with a continuous helical groove of the socket with pin and roller, within the helical groove.

A disadvantage of the known device is its complexity, in addition, to use it you must first spend a tripping operation by removing the column tubing, which was carried on crude oil production. Due to the fact that the intervals of the inputs in the lateral trunks are not isolated from each other, carrying out technological treatments in one lateral wellbore affect the state of other sidetrack the well.

The closest to the technical nature of the claimed invention is the orientator flexible pipes [6], which contains mixed case, in which is placed a hollow piston return spring hollow piston, a rotary spindle, grupowy the crown, the teeth of which are recorded by the dogs. It also contains two gear coupling, one of which is placed in the lower part of the hollow piston, and the other in the upper part of the rotary spindle mounted opportunity to interact among themselves, with their open position the tion provides a return spring hollow piston; additional return spring that returns the rotary spindle in the upper initial position, spline coupling, kinematically connected with the lower part of the rotary spindle means arranged therein a slot and mounted in the lower part of the precast housing by means of a threaded sleeve, the lower end of which is arranged ratcheting coupling, dogs which cooperate with the ratchet teeth of the crown, arranged on the body of the spline coupling; rotatable housing, the upper part of which is connected with the lower part of the splined clutch containing fixed on its inner wall a spring and a longitudinal window, arranged opposite the spring, a hollow piston mounted Cams interacting with screw grooves made on the wall of the precast housing, and the inner diameter of the hollow piston is larger than the diameter oriented flexible tube by the amount of gap gap, providing the necessary pressure differential between the zones above and below the piston.

A disadvantage of the known device is that to use it you must first spend killing all the sidetracks and perform lifting operations to extract the column tubing, which was carried on crude oil production.

The problem to be solved by the group of inventions, Gara is the targeted delivery of coiled tubing pipes with the appropriate equipment in a given lateral wellbore through the drill pipe, is the oil, and, as a consequence, low-cost technology for geophysical research and technological treatments in the mining multilateral well.

The problem is solved due to the fact that the method of delivery of the equipment within the defined range multi-lateral production well, including the descent of equipment for coiled tubing pipe in the tubing pipes installed through the packers in a given interval of the well, according to the invention on the column tubing by the number of laterals and given their coordinates set oriented with the wellhead diverters, are designed to ensure delivery of the equipment from the column booster pump tubes in a lateral wellbore with a closed access through it equipment in the lower interval of the column tubing, with the possibility of passing through it equipment in the lower interval of the column tubing when closed via the access equipment in a lateral wellbore, and with the possibility of sealing the column tubing in oil production.

In addition, the delivery of equipment into a lateral wellbore can be carried out through the sealed side of the but of the whipstock, azimuth is aligned with the entrance into a lateral wellbore through the orientation of the whipstock from the wellhead.

Thus the orientation of the whipstock to the azimuthal alignment of the window of the whipstock with the entrance in the side of the trunk, its opening and closing can be accomplished through the coiled tubing pipe, equipped with a retractable under the action of the hydraulic impact of the corresponding nozzle, designed for interaction with elements of the whipstock.

The problem is solved also due to the fact that the whipstock made with the possibility of installation on the column tubing, containing a hollow rotatable housing, is provided in the lower part of the at least one guiding element and a longitudinal window to exit coiled tubing pipe in a lateral wellbore, the ratcheting coupler, consisting of two interacting parts, one of which is connected to the upper part of the rotary body, according to the invention the second part of the ratchet clutch is made with the possibility of rigid connection with the column tubing; inside the rotating body has a hollow sleeve can move fixing in the lowest position with ensuring the sealing of the column booster pump pipes, fixing in the extreme upper position and a fixed regards the PTA along with the case without rotation relative to the housing, the diameter of its internal channel allows the passage of the coiled tubing pipes with nozzles and deflector element located at its lower end, provides direction coiled tubing pipe in a lateral wellbore through a longitudinal window of the hollow body, open position which is provided at the upper position of the sleeve, with the guide element of the case is made with the possibility of passing the coiled tubing pipe in the lower interval of the column tubing.

The claimed group of inventions is illustrated by the following drawings: figure 1 shows a cut multilateral wells located in her column tubing with packers and diverters; figure 2 - section of the diverter down coiled tubing pipe nozzle that opens the side window; figure 3 is a section of whipstock open through the nozzle side window; figure 4 - section of whipstock with a lowered through the open side window on coiled tubing pipe nozzle into a lateral wellbore; figure 5 is a section of the diverter closed using coiled tubing pipe with nozzle side window.

The method of delivery of the equipment for coiled tubing pipe at a given interval multilateral mining wells, implemented using diverters, schemati is but depicted in figure 1. In the well with the casing 1 perform preliminary geophysical investigations to clarify the location of laterals 2, 3, 4, and then make the descent of the casing 5 with the packers 6, 7, 8, 9, designed to isolate intervals of 10, 11, 12 sidetracking 2, 3, 4, respectively. In each of these intervals on the tubing string 5 are identical diverters 13, 14, 15, above or below which has operated from the wellhead (Fig. not shown) circulating valves respectively 16, 17, 18, through which is joint or separate extraction of formation fluid from the side of the shafts 2, 3, 4 and the main shaft 19. If necessary carrying out one of the trunks or all trunks of geophysical research or technological treatments (for example, in the side of the barrel 3, the interval 11 which is limited by the packers 7 and 8) close the circulation valve 16 and 18, spaced at intervals of 10 and 12, to exclude the impact of its operations on the lateral trunks 2 and 4. Inside of the casing 5 down coiled tubing pipe 20 and lowered her to the entrance of the whipstock 14 presented in figure 2.

The deflector Shoe 14 includes a housing 21 mounted on bearings 22 and 23 on the tubing string 5 and connected with it through a ratchet clutch 24. The sealing body 21 and the casing 5 is carried out with p the power of the seal 25. Inside the housing 21 can move installed sleeve 26, the inner channel 27 which is screw grooves 28. The sleeve 26 is arranged in the boss 29, which, moving along the groove 30, is made on the side of the case 21, fixing the sleeve 26 against rotation inside the housing 21 (alternatively, the lug 29 may be arranged on the housing 21, and the groove 30 on the sleeve 26). On the side of the case 21 are diametrically or at an angle relative to the groove 30 is a window 31. The bottom end of the sleeve 26 is arranged deflecting element in the form of the stop 32, which is located diametrically with respect to the window 31. In the housing 21 are diametrically fence 32, but below it also features a deflecting element in the form of the stop 33. On the sleeve 26 mounted locks 34, which are fixed inside the housing 21 in the extreme upper and extreme lower positions. Between the sleeve 26 and the housing 21 is arranged seal 35, which isolates the internal cavity 36 of the casing 5 from the annular space 37 within the casing 1 in the interval 11 between packers 7 and 8. Work the same way diverters 13 and 15.

The method of delivery of the equipment for coiled tubing pipe in the tubing string equipped with diverters, in a given interval of the well is as follows.

One of the necessary conditions for guaranteed delivery of equipment to sidetrack the well is s is the azimuthal coincidence window 31 of the housings 21 logging in to the corresponding side of the trunk. For this purpose, if necessary, before delivery of the equipment to sidetrack produce orientation diverters so that the side window 31 of the housing 21 is always azimuthal coincided with the entrance in the side of the trunk. This operation is performed in the following sequence. In the tubing string 5 (1, 2) coiled tubing pipe 20 with a nozzle 38, passing through the upper whipstock 13, located in the interval 10 kickoff side of the barrel 2, enters into the inner channel 27 of the sleeve 26, the output of which focus 32 sends it to the stop 33 of the housing 21, which, in turn, directs the coiled tubing pipe 20 with a nozzle 38 in the lower interval of the casing 5, and then to the whipstock 14 located in the interval 11 kickoff side of the barrel 3, which is necessary to make technological processing. Coiled tubing pipe 20 with a nozzle 38 passes through the inner channel 27 of the sleeve 26 to the exit. In coiled tubing pipe 20 by a pump located at the wellhead (figure not shown), raise the pressure, resulting from the nozzles 38 out "crackers" 39. After that, the operator begins the rise of the coiled tubing pipe 20. "Crackers" 39 abuts the lower end 40 of the sleeve 26, move up inside the housing 21, and the boss 29 is moved along the groove 30, thereby preventing rotation of the sleeve 26 relative to the housing 21. The sleeve 26 is raised to its extreme upper is the provisions, where the fixed locks 34. In the housing 21, a window 31. In coiled tubing pipe 20, the pressure is reduced to hydrostatic. "Crackers" 39 is returned to the nozzle 38. Begin descent coiled tubing pipe 20. The nozzle 38, having reached the stop 32, rejected them in the direction of the window 31, and exits the housing 21. If the location of the window 31 azimuthal coincided with the inlet 41 in the side of the barrel 3, the pipe 20 with a nozzle 38 enters the side of the barrel 3. The operator monitors the readings of the hydraulic weight indicator (Gibeah) (figure not shown). If unloading coiled tubing pipe 20 has not occurred, then coiled tubing pipe 20 was held at sidetrack 3. If Gibeah showed a decrease in weight, then coiled tubing pipe 20 with a nozzle 38 on the exit window 31 of the housing 26 has reached a wall of the casing 1 and has not passed in the side of the barrel 3. In this case, the coiled tubing pipe 20 is raised on the mouth and produce a change of nozzle. Then coiled tubing pipe 20 with rotary nozzle 42 (Fig 3) is lowered into the borehole to the whipstock 14 located in the interval 11 side of the barrel 3. Coiled tubing pipe 20 with rotary nozzle 42, splined freewheel 43 and the retaining cap 44 passes through the inner channel 27 of the sleeve 26 to the exit. The sleeve 26 is in its extreme upper position. The pump, located at the mouth of the well (the figure does not show the n), in coiled tubing pipe 20 raises the pressure of the rotary nozzle 42 out "crackers" 45 that are fixed in the helical grooves 28 located in the channel 27 of the sleeve 26, and "crackers" 46 retaining nozzles 44 are pressed against the inner wall of the casing 5. Produce lift coiled tubing pipe 20, while the "breadcrumbs" 45, passing through the spiral grooves 28, rotate the sleeve 26 at a certain angle. The sleeve 26 through the boss 29 transmits rotation to the casing 21, which is rotated by the same angle, while retaining the nozzle 44 keeps from turning the rotary nozzle 42 and coiled tubing pipe 20 and the slotted freewheel 43 allows the rotary nozzle 42 to move within the sleeve 26, ratcheting clutch 24 secures the housing 21 in the new position.

In coiled tubing pipe 20, the pressure is reduced to hydrostatic. The "crackers" 45 and 46 are returned to the nozzles 42 and 44, respectively, and slotted freewheel 43 is returned to the transport position.

Coiled tubing pipe 20 (figure 4) lower down, at the exit of the sleeve 26, the stop 32 directs the nozzle 44 in the window 31 and then to the side of the barrel 3. If Gibeah, located at the wellhead, showed no weight loss, then coiled tubing pipe 20 has entered into a lateral wellbore, and it is taken by mouth. If Gibeah showed a decrease in weight, then coiled tubing pipe 20 is not held at sidetrack. This is the case, repeat the operation, rotation of the housing 21 until while coiled tubing pipe 20 will not come into sidetrack 3.

Ratcheting clutch 24 each time fixes the housing 21 of the orientator 14 in the new position.

After the coiled tubing pipe 20 has entered into a lateral wellbore 3, indicated by the lack of weight on the testimony of Gibeah, the operator raises it at the wellhead, where it has installed the equipment (Fig. not shown)necessary for carrying out technological operations and/or geophysical surveys. After that make a descent coiled tubing pipe 20 with the equipment to the whipstock 14, from which it through the open window 31 is held in the side of the barrel 3, and performs the process operations and/or geophysical surveys, after which the coiled tubing pipe 20 to raise equipment at the wellhead. The presence of such a structural element of the whipstock, as the stop 32 prevents the coiled tubing pipe to pass in the downstream spacing of the tubing string.

After climbing to the top of the well on coiled tubing pipe 20 (5) set the nozzle 38 and lower in the interval 11 side of the barrel 3, not reaching the upper end 47 of the sleeve 26. In coiled tubing pipe raises the pressure of the nozzles 38 out "crackers" 39, coiled tubing pipe 20 unload on the sleeve 26 and thereby move it to the lowest position, in which it top the t box 31 and is fixed locks 34. Seal 35 seals the inner space 36 of the casing 5.

For operations on orientation downstream of the diverter 15 (1) coiled tubing pipe 20 with a nozzle 38 (figure 2) is lowered to the whipstock 14, sleeve 26 which is in the lower position and closes the window 31. At the exit of the sleeve 26 coiled tubing pipe 20 with a nozzle 38 under the action of the stop 32 elastically bends and goes to the stop 33 on the bottom part of the housing 21. Under the action of the stop 33 coiled tubing pipe 20 with a nozzle 38 is again elastically bent and routed to the downstream internal cavity 36 of the tubing 5 and further to the diverter 15.

Similarly produce rotation of the casing whipstocks 13 and 15 at intervals of 10 and 12 sidetracking 2 and 4, respectively.

The orientation of the housings 21 are performed only once for all time of operation of laterals. For delivery in sidetracks equipment and the technological treatments and geophysical studies in the future it will be necessary to carry out only the operations for raising and lowering the sleeve 26. The window 31 of the housing 21 diverters 13, 14 and 15 will always be directed to the appropriate side of the trunk.

After completion of the work associated with geophysical surveys and technological treatments in the lateral trunks, coiled tubing installation demonter who is from the wellhead. On the instructions of geological services, open the circulation valve in one or more intervals of the input side in trunks, of which the fountain or gaslift method according to the tubing string is oil. Thus it is provided with sealing. In the case of mechanical oil extraction method using a sucker rod pump in the tubing down deep and pumping equipment. When using electrical submersible pumps (ESP) the tubing turn in the interval, located above the upper packer, and lowered into the well the ESP.

The use of this group of inventions will significantly reduce the costs associated with technological treatments and geophysical research in multilateral wells, due to the absence of the need for prior extraction of the tubing string with the packers, because there is an opportunity to make sure coiled tubing pipe with the appropriate equipment in a given lateral wellbore through the drill pipe, which is oil production.

Sources of information

1. Vscroll, Akkaraipattu. Underground repair of wells using rope techniques. - M.: Nedra, 1985. 192 C.

2. EN 2352753, IPC EV 47/00, 2009.04.20.

3. EN 2196228, IPC EV 47/00, 2003.01.10.

4. SU 1739018, IPC EV 47/00, 1992

5. EN 2142559, IPC EV 47/01, 10.12.1999,

6. BY 12238, MP is EV 7/00, 2008.08.30.

1. The method of delivery of the equipment within the defined range multi-lateral production well, including the descent of equipment for coiled tubing pipe in the tubing pipes installed through the packers in a given interval of the well, wherein the string of tubing by the number of laterals and given their coordinates set oriented with the wellhead diverters, are designed to ensure delivery of the equipment from the tubing string into a lateral wellbore with a closed access through it equipment in the lower interval of the column tubing, with the possibility of passing through it equipment in the lower interval of the column tubing when closed through him access equipment in a lateral wellbore and with the possibility of sealing the column tubing in oil production.

2. The method according to claim 1, characterized in that the delivery of equipment into a lateral wellbore passes through a sealed side window deflector Shoe, the azimuth is aligned with the entrance into a lateral wellbore through the orientation of the whipstock from the wellhead.

3. The method of claim 2, characterized in that the orientation of the whipstock to the azimuthal alignment of the window, discard the body with the entrance in the side of the barrel, its opening and closing is realized by means of coiled tubing pipe, equipped with a retractable under the action of the hydraulic impact of the corresponding nozzle, designed for interaction with elements of the whipstock.

4. The whipstock for implementing the method according to claim 1, made with the possibility of installation on the column tubing, containing a hollow rotatable housing, is provided in the lower part of the at least one guiding element and a longitudinal window to exit coiled tubing pipe in a lateral wellbore, the ratcheting coupler, consisting of two interacting parts, one of which is connected to the upper part of the rotary body, wherein the second portion of the ratchet clutch is made with the possibility of rigid connection with the column tubing; inside the rotating body has a hollow sleeve can move, lock in the lowest position with ensuring the sealing of the column booster pump pipes, fixing in the extreme upper position of fixed and rotating together with the case without rotation relative to the housing, the diameter of its internal channel allows the passage of the coiled tubing pipes with nozzles and deflector element located at its lower end, provides direction Koltunov the second pipe in a lateral wellbore through a longitudinal window of the hollow body, open position which is provided at the upper position of the sleeve, with the guide element of the case is made with the possibility of passing the coiled tubing pipe in the lower interval of the column tubing.



 

Same patents:

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.

1 dwg

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.

4 dwg

FIELD: mining.

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.

13 dwg

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.

3 dwg

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.

3 dwg

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: mining.

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 and gas industry.

SUBSTANCE: control device (3) of tool (1) is installed between outlet of fluid medium supply channel (2) and tool (1) and includes tight housing (4) interconnected through connection pipe (6) or simple drain hole to outer space, and through pipeline (30, 31-32, 33) to the tool. At that, piston (5) installed in tight housing (4) under action of spring (55) occupies in normal condition the first position in which it covers the outlet of the above supply channel (2), and the above connection pipe (6) is interconnected with the pipeline. When fluid medium pressure in outlet zone of supply channel (2) exceeds certain threshold value, the piston overcomes the force of spring (55) and moves to the second position in which connection pipe (6) is isolated, and supply channel (2) is interconnected with the above pipeline (30, 31-32, 33) equipped at least with one non-return valve (9) with pre-loaded spring, which provides fluid medium passage under pressure from tight housing (4) to tool (1) when the pressure at the valve inlet exceeds certain threshold value and prevents the passage of fluid medium in backward direction.

EFFECT: invention provides repair of damaged sections of casing pipe, effective pumping and emptying of the tool in deep wells or in fluid containing zones of the well; only one supply channel is used; besides, invention has simple and reliable design.

2 cl, 4 dwg

FIELD: well surveying.

SUBSTANCE: invention belongs to the well surveying. For this purpose the submersible pumping systems, containing an electricity-driven submersible pump in the bore hole, is used. The passing of logging equipment is fulfilled within the inner electrical submersible pump passage up to the position below the inner passage way of the electrical submersible pump at the time of exploitation of such a pump inside the bore hole. According to the second scheme the logging equipment is shifted through the inner lengthwise passage and through the motor shaft of the electrical submersible pump system, located within the bore hole, up to the position beneath the inner lengthwise passage. The borehole fluid is extracted through the flow passage, not being a part of the inner lengthwise passage during the shift of the logging equipment along the inner lengthwise passage. Well logging system includes electrical submersible pump system, having the inner flow passage, going through the electrical submersible pump in order to receive the logging equipment system. The logging equipment system is fulfilled with the possibility of electrical submersible pump passing along the inner flow passage up to the position below the inner passage way of the electrical submersible pump. The electrical submersible pump contains a flow fluid passage, separated from the inner flow passage in such a way, that the inner flow passage do not receives the fluid flow.

EFFECT: enhancement of the well exploitation efficiency by means of well logging procedures beneath the well equipment point from inside the bore hole.

18 cl, 6 dwg

FIELD: gas and oil production.

SUBSTANCE: sealing packer for installation in side wellbore of multihole well includes case with sealing element between top and bottom supports, device of packer transportation and installation. Sealing element can rest on annular gooseneck of liner in the selected wellbore of multihole well, top support features annular rabbeting on top end, and the case features annular lug at the outside with a collet mounted on the case below, spring-loaded outwards and fixated by shear pin. The case features external annular rabbeting for spring ring which can interact with annular thread of the collet. Transportation and installation device is made in the form of cup and pusher inserted telescopically in the cup and equipped with ball support on top, gripped in a spherical bushing. Cup and pusher feature interconnected radial channels linked to pipe string. Cup is pulled onto the case of sealing packer and fixated by shear element, and collet can grip top annular gooseneck of liner of the selected wellbore of multihole well, when extended.

EFFECT: reliable simple design allowing use of sealing packer in side wellbores of multihole wells without additional equipment.

2 dwg

FIELD: oil and gas production.

SUBSTANCE: here is disclosed anchor for fixation of downhole equipment including cone with slips connected with string, case with holder and branch installed outside case and performing limited lengthwise travel downward, thrust by spring down from case and having inside circular groove for holder. Also, the cone is rigidly jointed to the case on external surface of which there is made recess for the holder. The holder corresponds to a spring expanding ring. The spring is set between upper and lower stops resting correspondingly on the branch and the case in transport position when they are fixed with a shear element. From beneath the branch rests on the slips which travel radially relative to the branch. The holder enters the groove of the branch when the spring is compressed.

EFFECT: reliable fixation of anchor structure in specified interval and guaranteed return of jammed elements of anchor into transport position owing to additional holding mechanism.

2 dwg

FIELD: oil and gas production.

SUBSTANCE: here is disclosed anchor for fixation of downhole equipment including cone with slips connected with string, case with holder and branch installed outside case and performing limited lengthwise travel downward, thrust by spring down from case and having inside circular groove for holder. Also, the cone is rigidly jointed to the case on external surface of which there is made recess for the holder. The holder corresponds to a spring expanding ring. The spring is set between upper and lower stops resting correspondingly on the branch and the case in transport position when they are fixed with a shear element. From beneath the branch rests on the slips which travel radially relative to the branch. The holder enters the groove of the branch when the spring is compressed.

EFFECT: reliable fixation of anchor structure in specified interval and guaranteed return of jammed elements of anchor into transport position owing to additional holding mechanism.

2 dwg

FIELD: oil and gas production.

SUBSTANCE: device for actuating packing element of packer consists of hollow case with stepped radial orifice, with at least one overlapped hollow sheared element, of positioner ensuring specified algorithm of positions of device by means of valve unit made in wall of case in form of local axial link with spring loaded piston-pusher installed in axial channel, at least in one. Over-piston space of the piston-pusher is connected with a cavity of the sheared element.

EFFECT: reliability of packering, maintaining specified pressure of packering.

2 dwg

FIELD: gas-and-oil producing industry.

SUBSTANCE: procedure consists in assembly of equipment on surface, in lowering pipes of electric pump and packer on string and in arranging them at specified depth. Also, there is primarily lowered the electric pump with an immersed electric motor to a cable jack. Further, pump equipment is assembled on surface. The power cable is passed through mounted elements of the packer; the power cable is connected with the immersed electric motor; a packer mandrel with a slot is installed on the electric pump or on the flow string; the slot in the mandrel of the packer is filled with sealing filler; further, the power cable is immersed into it; liquid sealing filler is conditioned to complete or partial hardening and mounted elements are arranged on the mandrel of the packer. The electric pump is then lowered into the well with the immersed electric motor and the packer with mounted elements to specified depth. The packer is packed; wellhead accessories with a cable entry are assembled; and the power cable is connected to a ground control station.

EFFECT: raised efficiency of well pump equipment operation, particularly at simultaneous separate development of several reservoirs.

6 cl, 6 dwg

FIELD: oil and gas production.

SUBSTANCE: device for transfer and fixation of equipment in well consists of case with upper and lower threads and with orifices. Dies held down with return springs are inserted into the orifices. A strap performing limited outside travels interacts with the die in its limit position. To interact in the limit position with the strap the die is equipped with a circular grooved expansion inside, while the strap corresponds to a plate with upper and lower faces and with an orifice for the die. Outside in the case there are made recesses for the straps, while inside there are made grooves for the return laminar springs interacting with the grooves of the corresponding dies. The straps and the return springs are fixed on the case with upper and lower subs screwed on corresponding threads of the case and equipped with internal and external lugs interacting correspondingly with the return springs and straps.

EFFECT: centring and reliable fixation of device and transfer of well equipment; eliminating hazard of device destruction caused by excess pressure and eliminating full projection of dies from case.

1 dwg

FIELD: oil-and-gas production.

SUBSTANCE: hole instrument is furnished with chaser plug and lowered to preset depth, along with pumping flush fluid into well, using log winch with geophysical cable (GC) furnished with cable tip (CT) and passed through sealing device inside the string so that its lower end enters the instrument exposed barrel under action of fluid pressure. Then horizontal parametres are registered in analysed range on lifting the instrument on the surface. Prior to lowering the instrument into the well, GC is introduced into swivel flush channel via neck to allow CT to extend from lead pipe exposed end. Sealing device is fitted in aforesaid neck, instrument is connected to CT and swivel is lifted to the height that allows unobstructed access to GC section in substantiated range with smaller rod lengths and distance between height level and lead pipe counter face that allows entering said pipe hole and clamping rid top ends therein in mounting/dismantling jobs. Note here that said instrument is lowered into the string so that CT extends from its face to the height required for aforesaid jobs. Two identical rods are first made with lateral cutouts made along their length with clamping assemblies for GC to be reliably laid and clamped therein. Rigid segmented pusher is produced and instrument is lowered into the string on GC.

EFFECT: higher efficiency in complicated wellbores.

5 cl, 8 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to facilities for holding equipment, such as packers and jacks, in well. The hydro-mechanical anchor consists of a hollow rod with radial channels and of a case with an internal lug in an upper part forming a circular chamber between them. A piston coupled with dies and a pusher from inside interacting with dies are positioned in this chamber. On top the rod is connected with the case. The rod is spring-loaded from below and performs restricted motions downward. The case is equipped with openings communicated with a lower part of the circular chamber wherein there are arranged dies hinged atop the windows. Inside, the dies have an inclined recess expanding from central axis. From below the pusher is rigidly connected with the piston and is equipped with external lugs having extensions for corresponding recesses of the dies.

EFFECT: reliable operation, simple design, avoiding packer seating at its lowering into well, eliminating additional manipulations with drill column at anchoring.

4 dwg

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

Up!