By-pass system of oil well pumping unit for dual pumping of well having at least two formations, by-pass system of oil well pumping unit for single and multiple zone wells and by-passing method for well survey

FIELD: oil and gas industry.

SUBSTANCE: by-pass system of oil well pumping unit for dual pumping of a well having at least two formations consists of Y-shaped unit installed at pipe string and pumping unit and string of bypass pipes with landing nipple for setting of removable blind plug are connected to the bottom part of this unit. Fishneck is located at setting of removable blind plug in the nipple in Y-shaped unit over the string of bypass pipes while the latter is fixed to the pumping unit by means of clams. Landing nipple is manufacture so that geophysical plug can be set in it instead of removable blind plug. In the well beneath by-pass system with pumping unit there are at least two packers of mechanical, hydromechanical or hydraulic action. Each packer is installed over respective well formation and at formation level between them there is at least one chamber with union or flow adjuster or stationary mandrel or pilot-controlled valve with hydraulic, electrical or mechanical actuation and ability to adjust flow passage with two positions of open and closed. Over the top packer there is pipe string disconnector at which adapter in disengaged status is installed. At the lower end of pipe string there is a blind plug or nipple-hopper. Besides geophysical plug can be set into landing nipple in by-pass of pumping unit instead of removable blind plug and nipple-hopper is fixed at the string of bypass pipes from the bottom. Upwards the latter the string of bypass pipes and pumping unit are interconnected by supporting structure. Telescopic sleeve is installed under the landing nipple at string of bypass pipes. Removable blind plug has sliding skirt in the upper part for pressure balancing and a tip in the lower part for wire or rope fixing. Bypassing method involves trip in hole of the tool at logging cable; the tool is installed at the logging cable with geophysical plug. Two hammers with frictional insert or inner surface with jagged notches are installed at the logging cable. The bottom hammer is installed 10-20 m higher then the tool. The top hammer is installed at bigger or equal distance from location point of geophysical plug in Y-shaped unit before the lower boundary of the surveyed formation. Geophysical plug is made with slide-off bushing in order to balance pressure.

EFFECT: improving operational reliability of downhole equipment during surveys of wells in production string downstream pumping unit due to accident-free removal of removable blind plug and geophysical plug in surveying process.

5 cl, 9 dwg

 

The bypass system of the downhole pump unit for dual completion wells having at least two layers, the bypass system of the downhole pump unit for single and multilayer wells and way of bypassing for the study wells

The invention relates to the oil and gas industry and can be used for hydrocarbon production and research and downhole operations in the well without pulling the pump equipment.

Known bypass system downhole pumping well operation, consisting of the established on the string of pipe Y-shaped block to the bottom of which is connected in parallel pumping unit and the column bypass pipe with a landing nipple for installation on the wire removable hollow tube or geophysical tube, and the head of each of the tubes is when you install one of the tubes in the nipple in the Y-piece block over the column bypass pipe (see US patent No. 5099919, 31.03.1992).

From this patent there is a method of bypassing for the study wells by lowering into the well of the device on logging cable installed on geophysical logging cable plug with replaceable geophysical tube removable hollow tube, the descent of which implemented Aut on the wire.

Data system bypassing and way of bypassing allow the study of the well without removing from the well the pump unit. However, the use of a removable hollow tube which is lowered on a wire attached to a removable hollow tube and freely suspended condition of the pump unit and the columns of the bypass pipe leads to the complication of the operation system and reduce its reliability.

Closest to the invention to the technical essence and the achieved result in part of the bypass system, as the object of the invention is the bypass system of the downhole pump unit for monitoring and operation of wells, consisting of a set on the string of pipe Y-shaped block to the bottom of which is connected in parallel pumping unit and the column bypass pipe with a landing nipple for installation of a removable hollow tube, the fishing head which is when installing a removable hollow tube in the nipple in the Y-piece block over the column bypass pipe, and the latter is connected with the pump unit by means of clamps (see US patent No. 5213159, 25.05.1993).

Closest to the invention to the technical essence and the achieved result in part of the way of bypassing for the study wells, as the object of the invention is a method of bypassing sprovedene research wells by lowering into the well of the device on logging cable installed on geophysical logging cable plug (see patent RU No. 2449117, 27.04.2012).

The disadvantage of these devices and the method is the difficulty of extracting geophysical tube. Geophysical tube is removed after it stops logging tool in geophysical tube with the bottom end and the subsequent tension logging cable, which may lead to breakage of the geophysical cable and the loss of the logging tool. In addition, the data system and method does not allow for dual completion wells having at least two layers.

Task to be solved by the present invention is directed, is to simplify the operation of downhole equipment.

The technical result is achieved by improving the reliability of downhole equipment when conducting research in the wells in the production string below the pump, due to trouble-free extraction of the removable deaf and geophysical tubes in the process of conducting research that, as a result, can increase the production of hydrocarbons and term profitable operation of wells. In addition, it is possible to hold dual completion wells having at least two layers.

The problem is solved and the technical result is achieved in that the bypass system of wells is th pump unit for dual completion wells having at least two layers consists of a set on the string of pipe Y-shaped block to the bottom of which is connected in parallel pumping unit and the column bypass pipe with a landing nipple for installation of a removable hollow tube, the fishing head which is when installing a removable hollow tube in the nipple in the Y-piece block over the column bypass pipe, and the latter is connected with the pump unit by means of clamps landing nipple is made with possibility of installation in him geophysical tube instead of a removable hollow tube, in the well below the bypass system with pump unit is installed, at least two packer mechanical, hydro-mechanical or hydraulic action, each of the packer is set above the relevant layer of the well, and between them on the level of the reservoir is installed, at least one borehole camera installed in it fitting or flow regulator, or a stationary mandrel or a controlled valve with hydraulic, electric or mechanical control with adjustable orifice or have two positions open and closed above the upper packer is set disconnector pipe string, which is in the disconnected state, the adapter has been installed, and the lower end of the tubing set is aluska or nipple-funnel.

In addition, the problem is solved and the technical result is achieved in that the bypass system of the downhole pump unit consists of a set on the string of pipe Y-shaped block to the bottom of which is connected in parallel pumping unit and the column bypass pipe with a landing nipple for installation of a removable hollow tube, the fishing head which is when installing a removable hollow tube in the nipple in the Y-piece block over the column bypass pipe, and the latter is connected with the pump unit by means of clamps, a landing nipple is made with possibility of installation in him geophysical tube in place of the removable hollow tube, bottom on the column bypass pipes attached nipple-funnel, above the last column of the bypass pipe and the pump unit are connected to each other via the support element, under the landing nipple on the column bypass pipe installed telescopic pipe, and a removable blanking plug is made in the upper part of the sliding skirt for equalizing the pressure in the lower part of the lug for fastening wire or rope.

In terms of method, as the object of the invention the problem is solved and the technical result is achieved by a method of bypassing to study for single and multilayer wells provocatuer descent into the well of the device on logging cable installed on geophysical logging cable tube, on logging cable install two hammer with a friction insert or inner surface with a toothed notch, and the lower hammer set at 10-20 m above the logging tool, and the top is at a distance greater than or equal to the distance from the place of installation geophysical tube in the Y-shaped block to the lower border of the studied reservoir and geophysical tube perform with internal sliding sleeve to equalize the pressure.

Preferably on a removable blank tube hung on a wire, rope or cable, at least two Autonomous geophysical instrument, and the lower apparatus is installed above the bottom layer and the top - over the top.

Preferably on a logging cable with a pre-installed geophysical tube and two hammers down at least two geophysical device capable of transmitting information to the surface by a geophysical cable in real time, and lower the apparatus is installed above the bottom layer and the top - over the top, and on the surface of the receiving set-reader.

Thus, the above-described bypass system allows to perform a geophysical investigation in the industrial life of the well under the current pumping unit including is control of the production of separate objects when opened dual operation of two or more tapped reservoirs.

Figure 1 presents a General view of the bypass system.

Figure 2 presents a Y-shaped block bypass system

Figure 3 presents removable blanking plug.

4 shows the bypass system when conducting geophysical research.

Figure 5 presents the hammer

Figure 6 presents the geophysical tube

7 schematically presents the bypass system for dual use multi-layer well.

On Fig presents the bypass system when conducting geophysical research well when dual use multi-layer well.

Figure 9 presents the bypass system when conducting geophysical research well when dual use multilayer borehole geophysical devices with transmitting information to the surface by a geophysical cable in real time.

The bypass system of the downhole pump unit for dual completion wells having at least two layers consists of a set on the column pipe 1 Y-shaped block 2, to the lower part of which is connected in parallel pump unit 3 and the column bypass pipe 4 with a landing nipple 5 to install a removable hollow tube 6, the fishing head 7 which is priostanovka removable hollow tube 6 in a landing nipple 5 in the Y-shaped block 2 over the column bypass pipe 4.

Column bypass pipe 4 connected with the pump unit 3 by means of clamps 8. A landing nipple 5 is made with possibility of installation in him geophysical tube 9 instead of a removable hollow tube 6.

In the well below the bypass system with pump unit 3 is installed at least two packer (upper 10 and lower 11) mechanical, hydro-mechanical or hydraulic action. Each of the packer 10 and 11 is installed above the relevant layer of the well, and between them on the level of the reservoir is installed, at least one borehole camera (the upper 12 and lower 13) installed in it fitting or flow regulator, or a stationary mandrel or a controlled valve with hydraulic, electric or mechanical control with adjustable orifice or have two positions open and closed above the upper packer 10 is disconnector 14 pipe string 15, which is in the disconnected state has an adapter 16, and the lower end of pipe string 15 plugged or nipple-funnel 17.

On the bottom of the column bypass pipe 4 is fixed to the nipple-funnel 18, and above the last column of the bypass pipe 4 and the pump unit 3 are interconnected by means of the support element 19. Under the landing nipple 5 on the column bypass pipe 4 has a telescopic patruno is 20, and removable blanking plug 6 is made in the upper part of the sliding skirt 21 to equalize the pressure in the lower part of the lug 22 for fastening wire or rope.

On the logging cable 32 has two hammer (upper 23 and lower 24) with a friction insert 25 or inner surface with a toothed notch, and the lower the hammer 24 is set at 10-20 m above the logging tool 26, and the top 23 is at a distance greater than or equal to the distance from the place of installation geophysical tube 9 in the Y-shaped block 2 to the lower border of the studied reservoir and geophysical tube 9 perform internal sliding sleeve 27 for pressure equalization.

Removable hollow tube 6 can be suspended on a wire, rope or cable 28, at least two Autonomous geophysical device 29, and the lower unit 29 is mounted above the lower reservoir 30, and the upper device 29 is above the upper reservoir 31.

On the logging cable 32 with a pre-installed geophysical tube 9 and the two hammers 23 and 24 can be lowered, at least two geophysical unit 33 is able to transmit information to the surface through logging cable 32 in real time, with the lower unit 33 is mounted above the lower reservoir 30, and the top 33 is above the upper layer 31 and on the surface of the receiving set a reading condition is the device 34.

The bypass system of the downhole pump unit for dual completion wells works as follows.

First is the installation of the bypass system in the following sequence (figure 1).

Wrapped around the column bypass pipe 4 nipple-funnel 18. Then install the bearing element 19, connecting with the column bypass pipe 4 of the pump unit 3. In addition, a column of the bypass pipe 4 is fastened to a pump unit 3 by means of clamps 8. Y-shaped block 2 is connected with the pump unit 3, and then through the landing nipple 5 and the telescopic tube 20 to the Y-shaped block 2 is connected column of the bypass pipe 4.

The power cable (not shown) of the pump unit, is fastened to the Y-block straps 35 (Fig 2). In a Y-shaped unit 2 is installed removable blanking plug 6 (2).

Then the bypass system of the downhole pump unit for dual completion wells down to the desired depth on the tubing (tubing) 1.

In case you need to remove the removable hollow tube 6 into the well through the tubing 1 on a wire, rope or cable descends fishing tool, which Slavovitsa removable blanking plug 6 for the fishing head 7 (figure 2). Then moves the sliding skirt 21 (3), opening a passage 36. Thus, through the * channel 36 (Fig 3) is aligned with the pressure below and above the cuff seal 37 (3), that allows you to eject removable blank tube 6 of the Y-shaped block 2.

The location of the fishing head 7, a removable hollow tube 6 in the body of the Y-shaped block 2 over the column bypass pipe 4, and prevents the settling of mechanical impurities from the recovered fluid to the fishing head 7 removable hollow tube 6. In addition, the location of the fishing head 7 allows in case of any complications when removing a removable hollow tube 6 to use emergency catchers that it is impossible to work in the column of the bypass pipe 4.

A way of bypassing to study for single and multi-seam wells (figure 4) is as follows.

Y-shaped block 2 (figure 4) Assembly from the pump unit 3 and the column bypass pipe 4, down on the tubing string 1 at the desired depth.

The pump unit is started. If necessary, research pump unit 3 is stopped. Using a fishing tool remove the removable blank tube them into the well through the tubing string 1 down on the logging cable 32 geophysical instrument 26 (figure 4) and geophysical tube 9 (figure 4).

As well on a logging cable 32 are two hammer: the top 23 and bottom 24 (figure 4). Descent make up until geophysical tube 9 reaches the Y-shaped block 2, and in which rhni hammer 23 reaches in geophysical tube 9. Then, raising and lowering the logging cable 32 and the top of the hammer 23 strike at the geophysical tube 9, installing it in a landing nipple 5, to prevent overflows during the research. Next, start the pump unit 3, the display on the operating mode and carry out the measurement at the appropriate section under the pump unit 3. After the measurement of pump unit 3 stop and start to extract the logging cable 32 with a geophysical device 26 from the well. The rise of the logging cable 32 continue up until the bottom of the hammer 24 will not run into geophysical tube 9. Further lowering and raising, logging cable 32 of the lower hammer 24 strike at the sliding sleeve 27 geophysical tube 9 (6). After, the sliding sleeve 27 will be moved to the upper position, opens the bypass hole 38 (6), and will equalize the pressure above and below geophysical tube 9, and then, further blows up the bottom of the hammer 24 geophysical tube 9 is extracted and produced a further rise of the logging tool 26 from the well. Thus, the geophysical instrument 26 is not in contact with the geophysical tube 9 in the process of its extraction and eliminates breakage logging cable 32 and the loss of the logging tool 26.

The upper and lower hammers 23 and 24 are made and the two halves of the longitudinal connector and friction inserts or with the timing notch on the inner surface of the hammer 23 and 24 to prevent slippage of the hammer on the logging cable 32. Hammers are fixed on a logging cable 32 by means of screw connection.

When dual completion wells bypass system downhole pump unit (7) is as follows.

First collected the layout of underground equipment (such as 2 layers)consisting of a stub or nipple-funnel 17 (7), borehole cameras 12 and 13, mounted inside the fitting or flow regulator, or a stationary mandrel or a controlled valve with hydraulic, electric or mechanical control with adjustable orifice or have two positions open and closed, packers 10 and 11 (7) mechanical, hydro-mechanical or hydraulic action of the disconnector 14 pipe string 15 hydraulic or mechanical action.

The layout of the equipment down on the tubing string 1 at the desired depth. Then landing packers 10 and 11, for separation of the layers 30 and 31. The upper packer 10 is set above the upper reservoir 31, and the lower packer 11 above the bottom layer 30.

After landing packers 10 and 11 and the integrity of their installation is removing the disconnector 14 columns of tubes 15 of the tubing 1 and the latter is lifted from the well together with the extracted part of the disconnector 14.

Then using the rope technique, or geofizicheskogo the lift, or install flexible pipe or pipe tubing 1 lower adapter 16, which is mounted on the unrecoverable portion of the disconnector 14 pipe string 15. After installing the adapter 16 wire, geophysical cable, flexible pipe or pipe tubing 1, which was made the descent of the adapter 16 is retrieved from the well. The adapter 16 is used to input the geophysical devices 26 or 29 in the layout of underground equipment for research.

Then going to the bypass system with pump unit 3 is lowered into the well pipe tubing 1 to the desired depth, after which the pump unit 3 is started.

A way of bypassing for geophysical research well, when dual use multilayer wells Autonomous geophysical instruments 29 (Fig) works as follows (for example layer 2).

In the well down to the layout of underground equipment, consisting of a stub or nipple-funnel 17, packers 10 and 11 mechanical, hydro-mechanical or hydraulic action, borehole cameras 12 and 13 with installed fittings or flow regulators, or stationary mandrel or managed valves with hydraulic, electric or mechanical control with adjustable orifice or have two positions open is then closed, disconnector 14 pipe string 15 and the adapter 16.

Then on the desired depth of the down-pass system with pump unit 3. Runs well and display mode. Research well stop. Remove the removable blank tube 6.

Removable blanking plug 6, the lower part has a tip 22, which produce a fastening wire or rope attached to it offline geophysical instruments 29. Then using the rope technique or geophysical lift or flexible pipes removable blanking plug 6 attached to it on the wire or rope 28 Autonomous geophysical devices 29, descends into the well and installed in a Y-shaped block 2, and Autonomous geophysical devices 29 are attached to the removable hollow tube 6 so that when you install a removable hollow tube 6 in the Y-shaped block 2, upper geophysical device 29 is located above the upper reservoir 31, and the lower geophysical instrument 29 above the bottom layer 30.

After the measurement of the well stops, removable blanking plug 6 with Autonomous geophysical instruments 29 is removed from the well. Install removable blanking plug 6 without instruments and well run.

A way of bypassing for geophysical research well while at the same time-RA the efficient operation of multi-reservoir well logging instrument 33 transmitting information to the surface through logging cable 32 in real time (Fig.9) works as follows (for example layer 2).

In the well down to the layout of underground equipment, consisting of a stub or nipple-funnel 17, packers 10 and 11 mechanical, hydro-mechanical or hydraulic action, borehole cameras 12 and 13 with installed fittings or flow regulators, or stationary mandrel, or managed valves with hydraulic, electric or mechanical control with adjustable orifice or have two positions open and closed switch 14 pipe string 15 and the adapter 16.

Then lowered into the well on a logging cable 32 geophysical devices 33, geophysical tube 9, the upper hammer 23, the lower the hammer 24.

Descent make up until geophysical tube 9 reaches the Y-shaped block 2, and the upper hammer 23 reaches in geophysical tube 9. Then, raising and lowering the logging cable 32 and the top of the hammer 23 strike at the geophysical tube 9, installing it in a landing nipple 5 to prevent overflows during the research.

Geophysical devices 33 on the logging cable 32 is set so that when you install geophysical tube 9 in the Y - shaped block 2 upper geophysical device 33 is located above the upper reservoir 31, and the lower geophysical device 33 is above the bottom layer 30.

Research data item is a geophysical cable 32 is transmitted to the surface for receiving a card reader 34. After completion of the research, the well is stopped and geophysical cable 32 with geophysical instruments 33 raise, up until the bottom of the hammer 24 will not run into geophysical tube 9. Lowering and lifting the logging cable 32, the lower the hammer 24 to move the sliding sleeve 27 geophysical tube 9, by opening the bypass hole 38, equalize the pressure above and below geophysical tube 9, and retrieve geophysical tube 9 from the landing nipple 5 Y-shaped block 2. Then raise the logging cable 32 with geophysical instruments 33 on the surface. Install removable blank tube 6 without instruments and well run.

Thus, the invention improves the reliability of geophysical research odnolistovymi and multilayer wells with running pump installation, and to reduce accidents when carrying out geophysical surveys for pump installation.

The present invention can be used in the oil and gas and other industries in borehole extraction of various fluid environments.

1. The bypass system of the downhole pump unit for dual completion wells having at least two layers consisting of a set on the string of pipe Y-shaped block to the bottom of which is parallel to accession the s pump unit and the column bypass pipe with a landing nipple for installation of a removable hollow tube, the fishing head which is when installing a removable hollow tube in a landing nipple in a Y-shaped block over the column bypass pipe, and the latter is connected with the pump unit by means of clamps, wherein the landing nipple is made with possibility of installation in him geophysical tube instead of a removable hollow tube, in the well below the bypass system with pump unit is installed at least two packer mechanical, hydro-mechanical or hydraulic action, each of the packer is set above the relevant layer of the well, and between them on the level of the reservoir is installed, at least one borehole camera installed it fitting or flow regulator, or a stationary mandrel or a controlled valve with hydraulic, electric or mechanical control with adjustable orifice, or have two positions open and closed above the upper packer is set disconnector pipe string, which is in the disconnected state, the adapter has been installed, and at the lower end of the column of tubes plugged or nipple-funnel.

2. The bypass system of the downhole pump unit for single - and multiple-zone wells, consisting of a set on the string of pipe Y-shaped block to the lower part of which parallel is but attached to the pump unit and the column bypass pipe with a landing nipple for installation of a removable hollow tube, the fishing head which is when installing a removable hollow tube in a landing nipple in a Y-shaped block over the column bypass pipe, and the latter is connected with the pump unit by means of clamps, wherein the landing nipple is made with possibility of installation in him geophysical tube in place of the removable hollow tube, on the bottom of the column bypass pipes attached nipple-funnel, above the last column of the bypass pipe and the pump unit are connected to each other via the support element, under the landing nipple on the column bypass pipe installed telescopic pipe, and a removable blanking plug is made in the upper part of the sliding skirt for pressure equalization in the lower part of the lug for fastening wire or rope.

3. A way of bypassing to study for single and multilayer wells by lowering into the well of the device on logging cable installed on geophysical logging cable tube, characterized in that on the logging cable install two hammer with a friction insert or inner surface with a toothed notch, and the lower hammer set at 10-20 m above the logging tool, and the top is at a distance greater than or equal to the distance from the place of installation geophysical tube in the Y-clicks the testing unit to the lower border of the studied reservoir, and geophysical tube perform with internal sliding sleeve to equalize the pressure.

4. The method according to claim 3, characterized in that the removable blank tube hung on a wire, rope or cable, at least two Autonomous geophysical instrument, and the lower apparatus is installed above the bottom layer and the top - over the top.

5. The method according to claim 3, characterized in that on the logging cable with a pre-installed geophysical tube and two hammers down at least two geophysical device capable of transmitting information to the surface by a geophysical cable in real time, and lower the apparatus is installed above the bottom layer and the top - over the top, and on the surface of the receiving set-reader.



 

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6 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method consists in emission of sounding pulses by means of a generator solenoid located inside tested pipes, the axis of which coincides with axis of the tested pipes, and measurement of EMF induced in receiving coils by means of an electromagnetic field decrease process. Magnetic flux is measured, which is caused by sounding pulses of the generator solenoid, by means of sensors located along the instrument perimetre at distance r from the probe axis, opposite the end face of the generator solenoid, in N sectors on radial direction.

EFFECT: enlarging application area and improving quality of pipe flaw detection.

10 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves arrangement of an fibre-optic cable in a production well; determination of well shaft temperature; build-up of a temperature vs. well depth graph; indication on the graph of a temperature rise minimum by 10 degrees, which is the closest one to the well head; determination of depth of well liquid level as corresponding to depth of the indicated temperature rise.

EFFECT: determination of liquid level in a well with high temperature for extraction of high-viscosity oil.

1 dwg

FIELD: measuring equipment.

SUBSTANCE: for determining the characteristics of pore volume and thermal conductivity of matrix of samples of porous materials, the sample of porous material is alternately saturated with at least two fluids with different known thermal conductivity. As at least one saturating fluid a mixture of fluids from at least two fluids with different known thermal conductivity is used. After each saturation of the sample the thermal conductivity of the saturated sample of the porous material is measured, and the characteristics of pore volume and thermal conductivity of the matrix of the sample of porous material is determined taking into account the results of thermal conductivity measurements.

EFFECT: increased accuracy and stability of determining the characteristics of the pore volume and the thermal conductivity of the test samples.

14 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: standard electric logging of a well is carried out in low-temperature rocks, the area of possible bedding of gas hydrates and hydrate formation is identified in them. In the identified area of low-temperature rocks, on the basis of data of standard electric logging, zones are registered, in which measured values of the apparent electric resistance of low-temperature rocks are equal to at least 15 Ohm.m. Coolant is pumped in the investigated rock interval, afterwards thermometry is realised using highly sensitive thermometers, providing for error of temperature measurements of not more than 0.01C, and zones are sought for, rock temperature in which, relative to the lowest registered temperature in the identified zone is at least by 0.2-0.5C lower than the temperature of rocks adjacent to the borders of the detected zones. At the same time the latter zones are considered as zones containing gas hydrates. The area of possible bedding and hydrate formation is the area of rock bedding characterised by availability of thermobaric conditions for gas hydrates existence in rocks.

EFFECT: its higher efficiency by detection of gas hydrate rocks bedded in low-temperature rocks below a foot of permafrost rocks.

3 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes delivery of a shank with a set of packers and unions, downhole geophysical multi-purpose device to the hole end at a logging cable. Pumping into the well of a fluid containing thermal- and neutron-contrasting agents and periodical measurements. Contrasting fluid is pumped by several portions with volumes not less than interior volume of the horizontal borehole by means of subsequent switching into operation of different boreholes intervals covered by packers, by means of opening and closure control of outlet connections. Oil is used as a contrasting fluid instead of water. Movement of the contrasting fluid through the borehole is monitored by gamma-ray modules, resistivity meter or thermoconductive flowmeter.

EFFECT: improving accuracy for determination of operating intervals and sources of flooding under conditions of horizontal wells operation.

5 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes acquisition of log data on depth and time for a well drilling by means of a well string; log data on depth and time including data related to factors of torsional and axial loads and data related to hydraulic factor; and determination of a drill string neutral point at the moment of drilling based on factors of torsional and axial loads and hydraulic factor.

EFFECT: determination of a drill string neutral point during well drilling.

20 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes simulating of formation and recording of data on borehole processes by a geophysical instrument run-in into the tubing string at a logging cable and self-contained instruments installed at the lower end of the tubing string. At that simulation of formation is made by breaking a breakable drain valve made of a brittle material of hemisphere shape and installed with a convex part downwards in the lower part of the tubing string; for this purpose a drill stem is fixed under the geophysical instrument and the geophysical instrument is run-in with the stem into the interval with speed sufficient to break the breakable drain valve. At that upper part of the tubing sting above the breakable drain valve is not filled with water and a packer is installed in tubular annulus at the level of the tubing string lower part.

EFFECT: increase of information content and reliability for borehole investigations; reduction of labour intensity, time consumption and equipment costs; possibility to use in wells with any producibility of the investigated formation.

1 dwg

FIELD: physics.

SUBSTANCE: electrodes are separately exposed to the impact of periodically accumulated potential energy of a spring, which is generated by rotating screw pairs and abrupt (impact) release of energy when screw interaction of crests of the screw pairs ceases. The apparatus for realising the method is a drive structure having an output shaft which actuates the screw pairs. During forward rotation, the screw pairs open centralisers and elastically press the electric leads to the wall of the well casing, apply periodic action on the electrodes that are rigidly connected to the electric leads. The electric leads are cut into the wall of the well casing. Impact action occurs when screw interaction between the screw and nut, which is pressed by a power spring, ceases.

EFFECT: improved electrical contact between electric leads and a casing column.

10 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves drilling of production and injection wells, pumping of displacement agent through injection wells and extraction of the product through production wells, drilling of additional wells, and development of residual oil-saturated intervals. According to the invention, in all newly drilled additional wells there determined are residual oil-saturated and flooded intervals prior to the well casing. For that purpose, one-stage determination of temperature field is performed throughout the length of the well in real time both at filling of the shaft with heated washing liquid or water and after it is filled using an optic-fibre system. In case of absorption of washing liquid or water, volume of their supply, which provides full filling of the well, is increased. After the well casing residual oil-saturated and/or water-saturated intervals are developed, and displacement agent is extracted and/or pumped.

EFFECT: increasing oil recovery owing to improving the accuracy of determination of intervals of arrangement of water-saturated and residual oil-saturated zones.

1 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

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