Device for mining of oil and dilatative-wave action on stratum

FIELD: oil-and-gas production.

SUBSTANCE: device includes lift string of pipes and plunger pump, implemented with ability of hydraulic communication of over-plunger and under-plunger parts. Pump casing on inner surface is outfitted by rows of vertical slots of length Lo with distance between to edges of underlying and bottom edges of overlying rows of slots Lp. Plunger on outside surface at a distance Lt from bottom butt is outfitted by annular chamfers with openings inside the plunger. Additionally Lp≥2Lo, Lt≤0,5Lo, and plunger's length of stroke Lx=(8-10)(Lo+Lp). Device is outfitted by tail, located lower the pump.

EFFECT: increasing efficiency of dilatative-wave action in well.

1 dwg

 

The invention relates to the oil industry and can find application in the operation of oil wells

A device for operating a well with a dilatation wave exposure, including tubing pipe, a support within this column, submersible pump, a shaft with a filter in the form of a support column tubes. Shank length equal to the distance from the pump intake to rock in the sump well. The pipe metal increases with depth. The shank is made with the possibility of loading the weight of the column tubing. Submersible pump is made with oil and dilatation wave stimulation (RF Patent No. 2124119, published. 1998.12.27).

The impact created by the pump, are insufficient to achieve the optimal modes of excitation of the productive formation and enhanced oil recovery reservoir due to the fact that the frequency energy spectrum of influences narrow, and the amplitude of impacts is limited by the height of the liquid column.

The closest to the proposed invention the technical essence is a device for the extraction of oil and dilatation wave stimulation, including lifting the string of pipe with filter and shank and plunger pump made with the possibility of hydraulic messages at ve is khnemu position of the plunger it mudpluggers and podprumerny parts (Patent RF №2136851, published. 1999.09.10 - prototype).

The known device is not effective due to the fact that the pressure pulses are generated in the borehole only once during the course of the plunger, and only at the upper position of the plunger.

In the proposed invention solves the problem of increasing the efficiency of the dilatation wave effects in the well.

The task is solved in that the device for extraction of oil and dilatation wave stimulation, including lifting the string of pipe and plunger pump made with the possibility of hydraulic messages mudpluggers and podprumerny parts, according to the invention, the pump housing is provided with rows of vertical slot length Lo with the distance between the upper boundary of the underlying and the bottom edges of the overlying rows of slot L, the plunger on the outer side surface at a distance L from the lower end face provided with an annular chamfers with holes inside of the plunger, while L≥2Lo, L≤0,5Lo.

The device may be provided with a shank positioned below the pump.

The proposed device for the extraction of oil and dilatation wave stimulation shown in the drawing.

In the pump housing 1 to form the completed rows of slot 2, and on the side surface of the plunger 3 at a distance L from the lower end of the annular chamfer 4 open the s 5 inside of the plunger 3. The plunger is equipped with a valve 6. In the pump casing below the plunger has a suction valve (not shown). Vertical slot has a length Lo, the distance between the upper boundary of the underlying and the bottom edges of the overlying series slot has a length L. This L≥2Lo, Lt≤0,5Lo. The pump casing 1 is placed in the lifting column, i.e. the column tubing 7.

Device for extraction of oil and dilatation wave stimulation works as follows.

During the course of the plunger 3 from the lowest position up at the closed valve 6 and open the admission valve in the pump casing in position "a" bevel 4 and holes 5 of the plunger overlap the pump casing 1 and a hydraulic connection between mudpluggers and podprumerny areas of the pump is missing. Liquid (oil) is served up to the lifting column, i.e. the column tubing 7. In position "b" bevel 4 and holes 5 in the plunger 3 coincide with slotted holes 2 in the pump housing 1 to form a hydraulic connection between mudpluggers and podprumerny parts of the pump, whereby the pressure of the compressed fluid from mudpluggers region is passed in podprumerny and affects gidromolot. Suction valve in the pump housing 1 prevents the flow of fluid from the pump, whereby the flow rate is almost not reduced. In p the Appendix "b" channels hydrowash between mudpluggers and podprumerny parts again overlap, and in the position "g" again formed.

When plunger goes down 3 valve 6 is open and the intake valve in the pump casing 1 is closed. Filling plunger 3 fluid regardless of any matches or mismatches chamfer 4 and holes 5.

Thus, the proposed device has a high efficiency due to the fact that the pressure pulses are created in the well many times.

Application of the proposed device will improve the efficiency of the dilatation wave effects in the well.

1. Device for extraction of oil and dilatation wave stimulation, including lifting the string of pipe and plunger pump made with the possibility of hydraulic messages mudpluggers and podprumerny parts, characterized in that the pump housing is provided with rows of vertical slot length Lo with the distance between the upper boundary of the underlying and the bottom edges of the overlying rows of slot L, the plunger on the outer side surface at a distance L from the lower end face provided with an annular chamfers with holes inside of the plunger, while L≥2Lo, Lt≤0,5Lo.

2. The device according to claim 1, characterized in that provided with a shank below the pump.



 

Same patents:

Pump plant // 2370671

FIELD: engines and pumps.

SUBSTANCE: proposed pump plant comprises cylindrical linear induction motor (LID) with stator 1 embracing plunger-rotor 2. The latter represents ferromagnetic tube for fluid passage. Valve 3 are arranged along tube 2. The latter moves in housing 4. LID stator is rigidly fixed in housing 4 with the help of plug 5. Housing 4 and tube 2 intercommunicate via mechanical power accumulator 6. End faces of the latter are rigidly coupled, via flange 7, with the tube and, via plug 5, with housing 4, for example by welding or by whatever other known method. Stator windings are connected, via control station, to power source. Control station is furnished with plunger-rotor rate pickup and stator supply system phase switch. Proposed has only one phase intermittently gets switched off, and two phases are not switched. Note here that motor does not go off and, intermittently changes over from three-phase into two-phase mode.

EFFECT: reduced transient switching processes.

1 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to engineering of oil production, particularly to sucker-rod pumps of well and can be implemented in oil and gas producing industry. The pump consists of a cylinder with a suction valve in a lower part. A hollow cylinder plunger is installed in the cylinder; a pressure valve is assembled in a lower part of the plunger. A sealing facility is located between the cylinder and the plunger. The sealing facility is made in form of a closed cavity filled with oil; the cavity is formed by side surface of the plunger and circular lugs made on internal surface of the cylinder; the lugs are arranged in a middle part of the cylinder and are equipped with sealing rings interacting with side cylinder surface of the plunger. Via a channel the closed cavity communicates with an oil tank installed above the cylinder. Length of the plunger is equal or more, than sum of lengths of the closed cavity and a maximal run of the plunger. The closed cavity can be equipped with a perforated cylinder shell installed between circular lugs along side surface of the plunger.

EFFECT: upgraded reliability of pump operation and increased efficiency of sealing rings.

2 dwg, 2 cl

FIELD: engines and pumps.

SUBSTANCE: invention relates to displacement pumps intended for pumping out aggressive and salt-containing fluids, including oil, from wells. Proposed pump comprises housing accommodating flexible diaphragm that divides it into chamber for actuating and pumped-out fluids. Chamber for pumped-out fluid communicates, via suction valve arranged on the chamber lower end face wall, with the well, and, via pressure valve arranged on the side of upper end face wall, with the channel discharging pumped-out fluid into tubing string. Actuating fluid chamber communicates with actuating fluid source. Note that pumped-out chamber accommodates perforated wall that makes a surface of contact with flexible diaphragm at overpressure inside actuating fluid chamber. Pump housing incorporates additional flexible diaphragm that makes extra pumped-out fluid chamber with additional perforated wall to come in contact with additional flexible diaphragm. Pumped-out chamber is arranged between flexible diaphragms. Shape of the chamber perforated walls coincides with that of flexible diaphragm.

EFFECT: higher reliability, increased life between repairs.

3 cl, 1 dwg

FIELD: oil industry.

SUBSTANCE: invention refers to oil industry and namely to methods of simultaneous separate operation of two beds of one and the same well. The method involves lowering and installation of a packer in the well between beds, production tubing, upper and lower pumps connected in series and arranged in the production tubing and connected with rods to a common top's drive. Pump inlets are connected to the spaces above the packer and below the packer correspondingly. The upper pump outlet is connected to the flow column, and the lower pump outlet - to the upper pump inlet. Then the drive is brought into operation and adjusted so that proportional pump capacity of the translational movement speed of rods with plungers can be changed. Pumps being installed are screw-type; production tubing before being lowered is equipped with couplings with calibrated central channels arranged below the pump shells fixed on the production tubing. Upper coupling is arranged within the channel connected to the space above the packer. Pump screws are equipped with upper and lower plungers, the upper one of which is through-type for longitudinal liquid flow. Diametres of plungers and screws are decreased downwards in order to pass through the shells and couplings which are not appropriate to them when being lowered. The stock is geared with the top's drive as well. Translational movement is performed in pulse mode; upwards from medium operating position for lower piston to interact with lower seat and for lower screw to come out of the shell upwards thus cutting off the space below the packer and performing the production only from upper bed, and downwards - for upper piston to interact with upper seat thus cutting off communication channels and the space above the packer and for upper screw to come out of the shell downwards and performing the production from lower bed.

EFFECT: method allows separate investigation of properties of beds and their production by consequent cutting off beds and the pumps corresponding to them, allows working with well production containing a great number of mechanical particles because only screw pumps are used for lifting the well production, as well as continuing production without replacing a differential pump and at changing the bed productivity ratio in the course of time.

2 dwg, 2 cl

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil production. Proposed drive comprises drive link shaft, drum fitted on support, circular housing consisting of base and cover with branch pipe communicating with pump-compressor pipe. Driving link shaft extension has coaxial gear with cylindrical ledge on free end face. Ledge diametre equals that of gear pitch line. There is lengthwise slot on the end face cylindrical surface. Gear wheel seats parallel to driving link shaft. Toothed concave and convex rims are arranged inside the housing. Coaxial barrels are arranged on faces of aforesaid rims. Two or more brackets are rigidly attached to the flat surface of base, the said brackets featuring arc-like concave stop. One end of concave stop is arranged above free end of cylindrical stop. Similar brackets support another arc-like convex stop. One end of convex stop is arranged above free end face of driving link shaft cylindrical ledge. Arc-like stop is arranged coaxially with latter and on brackets. There is a plate with longitudinal slot arranged between arc-like stops and housing cover, and rigidly attached to adjacent cheek of the drum. Slot outer surface width is smaller than slot bottom width. Additional flexible element is wound up on the drum. Additional hole with vertical branch pipe is arranged on the housing cover, in symmetry with the hole with flexible element. The said vertical branch pipe is tightly jointed to vertical cylinder with counterweight. The latter is jointed to second end of additional flexible element. There are some other versions of drive design.

EFFECT: higher drive efficiency.

11 cl, 16 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil simultaneous and separate extraction from two benches. Proposed pump upper cylinder communicating with pump-compressor pipe string, upper plunger with pressure valve communicating with rod string, lower cylinder, lower plunger with pressure valve and lower valve with filter. Upper and lower cylinders communicate via medium cylinder. Upper and lower plungers are coupled by a polished rod arranged in aforesaid medium cylinder to move in gland seal. Lower cylinder and medium cylinder gland seal seat communicate with pump-compressor pipe string via bypass line with valve. Bypass line inlet is arranged in medium cylinder upstream of lower plunger and downstream of gland seal. Lateral suction valve with filter is arranged on bypass line side, nearby it. Lateral suction valve inlet is arranged in medium cylinder downstream of upper plunder lower position and upstream of gland seal. Wall packer is arranged between lower suction valve and lateral suction valve outer surface.

EFFECT: higher efficiency of oil extraction.

1 dwg

FIELD: engines and pumps, oil industry.

SUBSTANCE: invention relates to oil industry and can be used in oil production with the help of deep-well rod-type pump. Proposed deep-well rod-type pump comprises cylinder and plunger arranged there inside to reciprocate. Both cylinder and plunger has grooves. Lower part of circular grooves has a horizontal wall, while upper part of the grooves features the wall skewed upward. Distance between the cylinder and plunger grooves does not exceed half the stroke of plunger.

EFFECT: removal of dirt in pump operation.

3 dwg

FIELD: engines and pumps, oil-and-gas production.

SUBSTANCE: invention relates to oil-and-gas production, namely to downhole pumping units. Proposed unit comprises bucket rods and pipes with threaded upsets. Note here that, to reduce the weight of bucket rod and pipe strings, on the outside of the latter bottles are fitted that incorporate 70 to 550 mm-dia.outer pipe and plugs filled with, for example, gaseous nitrogen or inert gas at 0.0001 to 188.4 MPa.

EFFECT: higher efficiency of plunger pumps, safe operation of pumps and pumps units.

6 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil-and-gas industry and can be used in operating oil wells, including directed and inclined ones. Proposed valve device comprises cylindrical housing with axial bore accommodating suction and discharge valves, each furnished with seat and ball. Rod is fitted right above the said seat and is linked with cup spring-loaded relative to the housing. Rod and wedge are arranged to interact with suction valve ball. There is lengthwise channel with bottom hole to receive the said wedge, arranged in the housing, right above the valve seat. Pushrod is rigidly coupled with aforesaid cup from above and inserted into the channel to effect lengthwise limited displacement. Wedge is arranged to interact with lateral hole upper edge during pushrod upward displacement.

EFFECT: higher reliability, expanded performances.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil-and-gas production and can be incorporates with deep-well rod-type pump plants (WRPP). Proposed pump comprises cylinder with lateral hole, extension pipes attached to the said cylinder and furnished with suction valve that incorporates larger-size permanent-design valve pair. Pressure valve is linked up with single plunger. Pump cylinder comprises device to plug afore mentioned hole. The device consists of two half-rings screwed together. One of the said half-rings features variable-section hole aligned with aforesaid lateral hole that has larger-section threaded part and is plugged with the help of breaker element representing e membrane. The element is nut-locked and gets broken by high pressure in pump cylinder inner chamber if it is required to drain fluid from column.

EFFECT: higher reliability.

4 dwg

FIELD: oil and gas production.

SUBSTANCE: group of inventions refers to procedure of pumping lift gas into production flow string of oil well via one or several devices for control of yield of lift gas and to facility applied thereon for control of lift gas yield. The essence of the invention is as follows: the facility consists of a tubular case of a valve with a flow passage connected with one end to pressure pipeline of lift gas, while with another end to internal space of production string; further the facility consists of a rotation body of a flap valve connected to the body of the valve and installed in the flow passage so that when the body of the valve turns into an open position it is essentially oriented parallel to the flow passage. When the body of the valve rotates into a closed position it orients perpendicularly to the flow passage and is pressed to a circular saddle of the valve thus shutting off lift gas pass via the flow passage. Also there is a protective bushing designed to slide in the flow passage between the first position, wherein the bushing passes through the circular saddle of the valve during rotation of the valve body in the open position protecting the valve saddle and valve body from wear under flow of lift gas or other fluid, and the second position wherein the bushing passes through a part of the flow passage before the valve body during rotation of the valve body in the closed position. There is a flow limiter forming a part of the protective bushing of the valve; dimension of the limiter produces different pressure with lift gas flowing through it; difference in pressure actuates the bushing to move into the first position. Also the bushing is characterised with a tapered narrowing part. External diametre of the bushing gradually diminishes in a successive direction of the bushing; the first flexible sealing ring is installed in the case before the saddle of the valve, therefore external surface of the narrowing part of the saddle is pressed to internal surface of the first sealing ring when the bushing is in its first position and in such way there is ensured an impenetrable for fluid sealing in circular space between the narrowing part of the bushing and the tubular body of the valve; as a result, in the second position of the bushing, the first sealing ring just not tightly contacts the narrowing part of the bushing.

EFFECT: facilitating efficiency of procedure and reliability of device operation.

10 cl, 2 dwg

Wellhead equipment // 2368759

FIELD: oil industry.

SUBSTANCE: invention refers to oil production, and namely to wellhead equipment. It consists of a casing head with side taps, which rests upon the pipe hanger with side taps, and the device for relieving pressure from the tube space. The device meant for relieving pressure from the tube space is a jet pump installed in the tube hanger tap. The suction of the jet pump is connected with the nozzle to the casing head cavity and to the annular space between the production casing and the flow column. The assembly for separate throttling of water and gas and for warming the flow being pumped is installed on the nozzle before the jet pump suction.

EFFECT: providing gas extraction and pressure relief from the tube space; when the flow is warmed, reliability of the wellhead equipment is increased.

1 dwg, 2 cl

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting oil-gas fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station connected to a central control unit, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a power functional hydropneumatic accumulator, linked through an actuating medium, mainly in form of liquid, with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of an oil-gas field, reduced cost of extracting formation fluid, easier control of processes due to automated control of well shutting-off devices.

24 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting gas fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a power functional hydropneumatic accumulator, linked through an actuating medium with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then, with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of a gas field, reduced cost of extracting gas, easier control of processes due to automated control of well shutting-off devices.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of gas-condensate fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of a gas-condensate well pad. The well pad comprises at least two gas-condensate wells, each of which contains a production casing with a flow column with underground production equipment, containing at least a remote controlled safety valve with an actuating mechanism, wellhead with wellhead equipment, with a casing head and a tubing head on which is mounted an X-mas tree with shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter with an actuating mechanism, and monitoring and control devices - a fuse link and a low- and high-pressure control valve. Each well is connected to a control station through its shutting-off devices, throttle valve and safety valve, where the control station comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator, connected to it through actuating medium of a high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve, safety valve for each well, supplied by the said high-pressure line, through pressure regulators, and can control their operation through a time-stepped system for delaying command transmission for at least shutting off each well in the logical sequence: "wing valve - casing valve - safety valve" - logical control line, linked to the fuse link and the low- and high-pressure control valve and fitted with hydraulic distribution valves, with possibility of backing up command transmission for shutting off each well. One of these valves can transmit a well shut-off command to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and safety valve. The delay mechanisms comprise a control hydropneumatic accumulator and a throttle, which provide for shutting off each well at different times. The power line for functional control of the actuating mechanism of the safety valve of each well is provided with at least one pressure booster, which interacts with a reducing pressure regulator, which provides for values which, when multiplied with the transmission ratio of the booster, provide for operating pressure at the output, required for operation of the actuating mechanism of the safety valve.

EFFECT: more reliable and accident-free operation of a well, which is part of a gas-condensate well pad and much easier control of processes.

17 cl, 3 dwg, 1 ex

Gas well pad // 2367787

FIELD: gas-and-oil production.

SUBSTANCE: invention relates to exploitation of gas fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of a gas well pad. The well pad comprises at least two gas wells, each of which contains a production casing with a flow column with underground production equipment, containing at least a remote controlled safety valve, wellhead with wellhead equipment, with a casing head and a tubing head, an X-mas tree with casing and wing valves, as well as a throttle valve adjacent to the latter with an actuating mechanism, and monitoring and control devices - a fuse link and a low- and high-pressure control valve. Each well is connected to a control station through its shutting-off devices, throttle valve and safety valve, where the control station comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator, connected to it through actuating medium of a high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve, safety valve for each well, supplied by the said high-pressure line, through pressure regulators, and can control their operation through a time-stepped system for delaying command transmission for at least shutting off each well in the logical sequence: wing valve - casing valve - safety valve - logical control line, linked to the fuse link and the low- and high-pressure control valve and fitted with hydraulic distribution valves, with possibility of backing up command transmission for shutting off each well. One of these valves can transmit a well shut-off command to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and cut off device. The delay mechanisms comprise a control hydropneumatic accumulator and a throttle, which provide for shutting off each well at different times.

EFFECT: more reliable and accident-free operation of a well, which is part of the gas well pad, reduced cost of extracting gas and much easier control of processes.

17 cl, 3 dwg

Oil well // 2367786

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil fields, and can be particularly used for remote, automatic and manual control of actuating mechanisms of well shutting-off devices. The well has a production casing with a flow column with underground production equipment, containing at least a circulating valve, shear valve, non-freezing check valve and, if necessary, a separating device, meant for separating oil and water. There is also a remote controlled device for cutting off flow of oil, which has an actuating mechanism, a wellhead with wellhead equipment, with a casing head, a tubing head, on which an X-mas tree is mounted, which includes shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter, which regulates well flow rate and has an actuating mechanism, and monitoring and control devices - a fuse link and a low- and high-pressure control valve. The well is connected to a station for controlling shutting-off devices, throttle valve and cut off device, which comprises a pump-accumulator unit and at least one control unit per well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator, connected to it through actuating medium of a high-pressure line. The control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and cut off device, where the said power lines are supplied by the said high-pressure line through pressure regulators, which reduce functional pressure to the required value. There is also a logical control line, which controls operation of actuating mechanisms through a time-stepped system for delaying command transmission for at least shutting-off the well in the logical sequence: wing valve - casing valve - cut off device. This line is connected to the fuse link and low- and high-pressure control valve and is fitted with hydraulic distribution valves with possibility of backing up command transmission for well shutting off. One of these valves can transmit a well shut-off command to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and cut off device. The delay mechanisms comprise a control hydropneumatic accumulator and a throttle, which provide for well shut-off at different times. The power line for functional control of the actuating mechanism of the throttle valves is provided with a three-position distribution valve, preferably with two electromagnets.

EFFECT: more reliable and accident-free operation of an oil well, reduced cost of oil extraction and much easier control of processes.

16 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting oil fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a power hydropneumatic accumulator, linked through an actuating medium with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of an oil field, reduced cost of extracting oil, easier control of processes due to automated control of well shutting-off devices.

25 cl, 3 dwg

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to mining industry and can be used for exploiting gas-condensate fields through remote, automatic and manual control of well shutting-off devices. According to the method, a well can be controlled through opening and closing of shutting-off devices of an X-mas tree - wing and casing valves and an underground safety valve, as well as through regulation of well flow rate using a throttle valve. The well is connected to a control station, which comprises a pump-accumulator unit and a well control unit. The pump-accumulator unit comprises a group of pumps and a modular-sectional power functional hydropneumatic accumulator, linked through an actuating medium with a high-pressure line, which connects them to the well control unit. The high-pressure line is connected through reducing pressure regulators to power lines for functional control of shutting-off devices and the throttle valve. The station is equipped with a logical control line, which is connected to actuating mechanisms, providing for automatic command transmission for consecutive closure of the wing valve, casing valve, underground safety valve through delay mechanisms. Each delay mechanism has a control hydropneumatic accumulator and a throttle, adjusted for given delay of flow of actuating medium from the control hydropneumatic accumulator. The shut-off command arrives at the actuating mechanism of the wing valve first, then with given delay, to the actuating mechanism of the casing valve, after which, with given further delay, to the actuating mechanism of the underground safety valve. The logical control line is hydraulically linked to monitoring and control devices - a fuse link and a low- and high-pressure control valve. The monitoring and control devices are connected through the actuating medium, each to its trigger mechanism which controls pressure release in the given logical control line. The logical control line is doubly provided with similar trigger mechanisms for remote and manual triggering successive closure of the said well shutting-off devices in the said order.

EFFECT: more reliable and accident-free operation of a gas-condensate field, reduced cost and easier control of gas-condensate extraction processes.

25 cl, 3 dwg

Oil well pad // 2367772

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of an oil well pad. The oil well pad comprises at least two oil wells, each of which contains an extracting column with a flow column with underground production equipment, containing at least circulating and shear valves, non-freezing return valve and, if necessary, a separation column, meant for separating oil and water, as well as a remote controlled device for cutting off flow of oil, made with an actuating mechanism, wellhead with wellhead equipment, with a column head, tubing head, on which an X-mas tree is mounted, which comprises shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter for controlling flow, made with an actuating mechanism, and monitoring and control elements - fuse link and a low- and high-pressure valve. Each well is linked through its shutting-off devices to a control station, which comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps and a high-pressure power functional hydropneumatic accumulator linked through the actuating medium of the high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and the cut off device, supplied by the said high-pressure line through pressure regulators, and controls their operation through a time-stepped system for command transmission for at least closure of a well in the logical sequence: "wing valve - casing valve - cut off device" - logical control line, linked to the fuse link and low- and high-pressure control valve and fitted with hydraulic control valves which can back up command transmission for closure of each well. One of the hydraulic control valves transmits a command for closing each well to the logical control line from the fuse link, the other - from the low- and high-pressure control valve, and at least two others - from remote and manual control, respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line with power lines for functional control of actuating mechanisms of the casing valve and the cut off device, where the delay mechanisms comprise a hydropneumatic accumulator and a throttle, which provide for closure of each well at different times. The power line for functional control of the actuating mechanism of the throttle valve is provided with a three-position distribution valve, preferably with two electromagnets.

EFFECT: more reliable and accident-free operation of oil wells, which are part of an oil well pad, reduced cost of extracting oil and much easier control of processes.

16 cl, 3 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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