CN213980766U - Non-metal composite coiled tubing oil production system for offshore platform - Google Patents
Non-metal composite coiled tubing oil production system for offshore platform Download PDFInfo
- Publication number
- CN213980766U CN213980766U CN202022690612.1U CN202022690612U CN213980766U CN 213980766 U CN213980766 U CN 213980766U CN 202022690612 U CN202022690612 U CN 202022690612U CN 213980766 U CN213980766 U CN 213980766U
- Authority
- CN
- China
- Prior art keywords
- pipe
- valve
- oil
- production
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a nonmetal composite continuous pipe oil production system for offshore platform, which is characterized in that the system comprises a production casing, a production packer, an underground safety valve, a composite material continuous oil production pipe, an exhaust valve, an electric hydraulic control conversion device and an electric submersible pump unit; a production packer is fixedly arranged in the production casing, an underground safety valve is arranged at the top of the production packer, and the top of the underground safety valve is fixedly connected with the bottom of the composite material continuous oil production pipe; the top of the composite material continuous oil production pipe is connected with a wellhead Christmas tree; an oil sleeve annulus is formed between the production casing and the composite material continuous oil production pipe; the two sides of the top of the production packer are respectively provided with an exhaust valve and an electro-hydraulic control conversion device, and the electro-hydraulic control conversion device is also respectively connected with an underground safety valve and an exhaust valve; the bottom of the production packer is fixedly connected with an electric submersible pump unit; electro-hydraulic control conversion equipment still connects the power supply unit who is located offshore platform, the utility model discloses can wide application in the oil development equips the field.
Description
Technical Field
The utility model relates to a compound coiled tubing oil recovery system of nonmetal for offshore platform belongs to the oil development and equips the field.
Background
With the increasing global energy shortage, people look to the sea and are dedicated to the exploitation of marine oil. More and more oil exploitation platforms are built at sea, and the exploitation amount of offshore oil is increased. As shown in fig. 1, in an existing oil production system for an offshore platform, a production casing is led into a seabed from the offshore platform, a wellhead Christmas tree and an oil pipe hanger are fixedly arranged on the offshore platform, a metal oil pipe is fixedly arranged in the production casing, the wellhead Christmas tree is connected with the top end of the metal oil pipe through the oil pipe hanger, and the metal oil pipe is fixedly suspended on a wellhead by the oil pipe hanger; the bottom end of the metal oil pipe is connected with an electric submersible pump unit positioned at the bottom of the well. In order to deal with the abnormal condition of the oil extraction process and prevent the oil well from being failed to pollute the ocean, a production packer is required to be arranged in an oil sleeve annulus formed between a metal oil pipe and a production casing pipe, and the oil sleeve annulus is divided into an upper layer and a lower layer by the production packer; the electric submersible pump unit is positioned below the production packer, and an underground safety valve is arranged on the production packer, is a control device for abnormal flow of fluid in a well, and can automatically close an oil way of a metal oil pipe under abnormal conditions to realize flow control of the fluid in the well.
The underground safety valve is kept in an open state during normal oil extraction, and crude oil is pumped into an oil way of the metal oil pipe from the air of the oil sleeve ring through the operation of the electric submersible pump unit, so that the crude oil in the stratum is extracted and conveyed to the offshore platform. Once abnormal conditions such as equipment failure occur, the underground safety valve is closed, so that a channel for underground fluid to reach the ground is cut off, and safety risks and environmental pollution caused by underground oil gas sprayed out of the ground are avoided. The exhaust valve is fixed on the production packer and is controlled to be opened and closed through a hydraulic pipeline. When the gas content below the production packer is too high and the pressure exceeds a set value, the exhaust valve can be opened to exhaust redundant gas into the upper oil sleeve annulus, and then annulus pressure relief is carried out through the wellhead four-way valve, so that the safety of a shaft is guaranteed. For an offshore oil and gas production well, the downhole safety valve, the vent valve and the production packer together form a safety isolation barrier for the upper wellbore.
For the exploitation of marine oil, it is an important issue to protect the marine environment from pollution. At present, an underground safety valve and an exhaust valve for an offshore platform oil production system are controlled to be opened in a hydraulic mode, and two hydraulic pipelines are needed to be adopted to respectively control the opening and closing of the underground safety valve and the exhaust valve. In addition, the downhole electric submersible pump or the screw pump also needs to provide downhole power through an external cable, so that when a metal oil pipe needs to be lowered one by one, the power cable and the two hydraulic control pipelines are respectively bound and fixed on the oil pipe and are lowered into the well along with the oil pipe. Because the hydraulic pipeline and the power cable are positioned outside the metal oil pipe and are in an exposed state, the hydraulic pipeline and the power cable are easily damaged due to collision in the installation process of lifting and lowering the well, one cable and two hydraulic control pipelines are tied up and fixed while the oil pipes are connected one by one, and the efficiency of well completion operation is relatively slow. In addition, since the inner diameter of the hydraulic line is small, the longer the hydraulic line is, the slower the pressure response time is, and the quick response cannot be achieved, which is also an unsafe factor. If the safety valve is arranged at a position close to an oil layer and the hydraulic control pipeline exceeds more than 1000m, the hydraulic pressure is increased along with the increase of the depth, the response time is delayed, and the risk of the closing delay and even the failure of the safety valve exists.
Disclosure of Invention
To the above problem, the utility model aims at providing a can eliminate external cable and the damaged risk of control line, and can improve the nonmetal compound coiled tubing oil recovery system who is used for offshore platform of operating efficiency and security.
In order to achieve the purpose, the utility model adopts the following technical proposal: a nonmetal composite continuous pipe oil production system for an offshore platform comprises a production casing pipe, a production packer, an underground safety valve, a composite continuous oil production pipe, an exhaust valve, an electro-hydraulic control conversion device and an electric submersible pump unit;
the production packer is fixedly arranged in the production casing, the downhole safety valve is arranged at the top of the production packer, the top of the downhole safety valve is fixedly connected with the bottom of the composite continuous oil production pipe through a hardware fitting, and the downhole safety valve is used for controlling the communication or closing of a flow passage of the composite continuous oil production pipe; the top of the composite material continuous oil production pipe is connected with a wellhead Christmas tree; an oil sleeve annulus is formed between the production casing and the composite material continuous oil production pipe;
the two sides of the top of the production packer are respectively provided with the exhaust valve and the electro-hydraulic control conversion device, and the electro-hydraulic control conversion device is also respectively connected with the underground safety valve and the exhaust valve; the bottom of the production packer is fixedly connected with the electric submersible pump unit used for lifting the downhole fluid to the ground;
electro-hydraulic control conversion equipment still connects the power supply unit who is located offshore platform, is used for doing the utility model discloses an each power consumption part power supply.
Preferably, the downhole safety valve comprises a valve pipe, a movable pipe, a spring, a pin shaft and a valve clack;
the movable pipe is movably inserted into the valve pipe, the top of the valve pipe is connected with the hardware fitting through an upper connector, and the bottom of the valve pipe is connected with the production packer through a lower connector;
the lower part of the upper joint extends into the valve pipe to form a hydraulic cavity with the interior of the valve pipe, a hydraulic oil channel is further arranged on the upper joint, one end of the hydraulic oil channel is connected with the electro-hydraulic control conversion device, the other end of the hydraulic oil channel is connected with the hydraulic cavity, the hydraulic cavity is located above the traveling pipe, and hydraulic oil in the hydraulic cavity is used for providing downward pressure for the traveling pipe;
an end ring is arranged on the outer side of the upper part of the traveling pipe, and the annular cavity among the end ring, the valve pipe and the traveling pipe is provided with the spring for providing upward pressure for the traveling pipe; the valve is characterized in that the valve is positioned below the movable pipe, the pin shaft is arranged on the inner side of the bottom of the valve pipe, the pin shaft is movably connected with one end of the valve clack, and the valve clack can rotate around the pin shaft to be in a transverse state or a longitudinal state; and the pin shaft is also sleeved with a reset torsion spring for resetting the valve clack.
Preferably, the electro-hydraulic control conversion device comprises a shell, a tail cover, a front cover, an oil storage capsule, a motor, a speed reducer, a high-pressure pump and an electromagnetic overflow valve;
the top of the shell is fixedly connected with the tail cover through a connecting piece, the bottom of the shell is fixedly connected with the front cover, an accommodating space among the shell, the tail cover and the front cover forms a shell inner cavity, and quantitative low-pressure hydraulic oil is contained in the shell inner cavity;
an opening for placing the oil storage capsule is formed in the tail cover, the inner cavity of the oil storage capsule is connected with the inner cavity of the shell, and the top of the oil storage capsule and the cavity formed by the tail cover are connected with an oil sleeve annulus above the production packer;
the motor, the speed reducer, the high-pressure pump and the electromagnetic overflow valve are arranged in the inner cavity of the shell, the input end of the motor is connected with one end of a motor power line, the other end of the motor power line penetrates through the oil storage capsule and is connected with a cable led out by the hardware fitting through the tail cover, and the cable is connected with a power supply device of the offshore platform;
the output end of the motor is connected with the high-pressure pump for pressurizing hydraulic oil in the inner cavity of the shell through the speed reducer; the outlet end of the main oil outlet pipeline path of the high-pressure pump penetrates out of the front cover and is connected with the hydraulic oil channel and the exhaust valve through an oil supply pipeline, the outlet end of the bypass oil outlet pipeline of the high-pressure pump is connected with the electromagnetic overflow valve through an overflow pipeline, and the outlet of the electromagnetic overflow valve is communicated with the inner cavity of the shell; the electromagnetic overflow valve is also connected with a power line of the motor.
Preferably, the cable led out by the hardware fitting is embedded in the pipe wall of the composite material continuous oil production pipe, led out from the top of the composite material continuous oil production pipe and then connected with a power supply device of the offshore platform.
Preferably, the electromagnetic overflow valve has two working states of overflow and unloading, and when a power supply device of the offshore platform supplies power to the electromagnetic overflow valve through the power line of the motor, the electromagnetic overflow valve is in an overflow state; when the power supply device of the offshore platform stops supplying power to the electromagnetic overflow valve through the motor power line, the electromagnetic overflow valve is in an unloading state.
Preferably, the bottom of the production packer is provided with a connecting pipe, and the bottom of the valve pipe is connected with the electrical submersible pump unit through the connecting pipe.
Preferably, the composite material continuous oil production pipe adopts a three-layer pipe body structure, the inner layer of the pipe body is an inner liner layer, the middle layer is a structural layer, and the outer layer is a protective layer; a hollow channel is formed in the tube body and used for allowing underground crude oil to pass through.
Preferably, the inner liner is made of corrosion-resistant high-density polyethylene, and a plurality of power cables and signal cables extending along the length direction of the pipe body are paved on the inner liner.
Preferably, the structural layer is made of high-strength fiber materials.
Preferably, the protective layer is made of a thermoplastic resin material.
The utility model discloses owing to take above technical scheme, it has following advantage:
1. the utility model discloses to produce packer and downhole safety valve setting in the shaft bottom that is close to oily charge pump unit of diving, can realize the shutoff to crude oil under the abnormal conditions in the shaft bottom to avoid the pollution to the ocean to the greatest extent, improved offshore oil production system's security performance.
2. The utility model discloses an electricity accuse conversion equipment has realized that long-range electric control combines together with hydraulic control in the pit, makes relief valve and discharge valve need not to rely on extra hydraulic pressure pipeline in the pit, thoroughly eliminates the potential safety hazard that naked hydraulic pressure pipeline probably takes place to leak, further improves offshore oil production system's security performance.
3. The utility model applies the composite material continuous pipe to the oil extraction operation of the offshore platform, because the composite material continuous pipe has excellent corrosion resistance, scaling resistance and wax resistance, and the power cable is embedded in the inner wall of the composite continuous pipe, the risk of external cable damage can be reduced, and the oil extraction system of the offshore platform has longer cycle service life; the single continuous length of the composite material continuous pipe is long, the composite material continuous pipe can be led into a well bottom from a well head all the time, and no connecting piece is needed in the middle, so that the operation is simpler, compared with the prior art, the quick installation operation can be realized, the labor intensity of workers is reduced, the operation efficiency is improved, and the composite material continuous pipe can be widely applied to the field of oil exploitation equipment.
Drawings
Fig. 1 is a schematic structural diagram of an oil production system for an offshore platform in the prior art, wherein 1 is a production casing, 2 is a production packer, 3 is a downhole safety valve, 6 is an oil pipe hanger, 7 is a gas release valve, 9 is an electric submersible pump unit, 11 is a ground hydraulic station, 12 is a metal oil pipe, 13 is a hydraulic control pipeline of the downhole safety valve, 14 is a power cable, and 15 is a gas release valve hydraulic control pipeline;
fig. 2 is a schematic diagram of the oil recovery system of the present invention;
FIG. 3 is a schematic view of the assembly of the downhole safety valve, the electro-hydraulic conversion device and the production packer in the oil recovery system of the present invention;
FIG. 4 is a top view of FIG. 3, wherein 16 is packer lower tubing and 17 is a cable and chemical injection valve crossing device;
fig. 5 is a schematic structural diagram of the oil recovery system of the present invention when the downhole safety valve is in an open state;
fig. 6 is a schematic structural diagram of the oil recovery system of the present invention when the downhole safety valve is in a closed state;
fig. 7 is a schematic structural diagram of the electro-hydraulic control conversion device in the oil recovery system of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings. It is to be understood, however, that the drawings are provided for a better understanding of the invention and that they are not to be interpreted as limiting the invention.
As shown in fig. 2, fig. 3 and fig. 4, the utility model provides a compound coiled tubing oil recovery system of nonmetal for offshore platform includes production sleeve pipe 1, production packer 2, subsurface safety valve 3, gold utensil 4, combined material coiled tubing 5, oil pipe hanger 6, discharge valve 7, electricity liquid accuse conversion equipment 8 and latent oily electric pump unit 9.
The production packer 2 is fixedly arranged in the production casing 1, the downhole safety valve 3 is arranged at the top of the production packer 2, the top of the downhole safety valve 3 is fixedly connected with the bottom of the composite continuous oil production pipe 5 through a hardware fitting 4, and the downhole safety valve 3 is used for controlling the communication or closing of a flow passage of the composite continuous oil production pipe 5. The top of the composite continuous oil production pipe 5 is connected with a wellhead Christmas tree 10 through an oil pipe hanger 6, and the composite continuous oil production pipe 5 is fixedly hung on a wellhead through the oil pipe hanger 6. An oil sleeve annulus I is formed between the production casing 1 and the composite material continuous oil production pipe 5, and the production packer 2 divides the oil sleeve annulus I into an upper layer and a lower layer.
Two sides of the top of the production packer 2 are respectively provided with an exhaust valve 7 and an electro-hydraulic control conversion device 8, the electro-hydraulic control conversion device 8 is further respectively connected with the underground safety valve 3 and the exhaust valve 7 through hydraulic pipelines, and the electro-hydraulic control conversion device 8 is used for controlling hydraulic oil to flow into or out of the underground safety valve 3 and the exhaust valve 7, and further controlling the opening or closing of the underground safety valve 3 and the exhaust valve 7. The bottom of the production packer 2 is fixedly connected with an electric submersible pump unit 9 positioned at the bottom of the well, and the electric submersible pump unit 9 is used for lifting the underground fluid to the ground.
The electricity accuse conversion equipment 8 still is located offshore platform's power supply unit through the cable junction that gold utensil 4 was drawn forth, is used for doing the utility model discloses an each power consumption part power supply.
In a preferred embodiment, the composite coiled tubing 5 is a three-layer tubular structure having a hollow passageway formed therein for the passage of downhole crude oil. The inner layer of the pipe body is an inner liner, the middle layer is a structural layer, and the outer layer is a protective layer, wherein the inner liner can be made of corrosion-resistant high-density polyethylene material, and a plurality of power cables and signal cables extending along the length direction of the pipe body are laid on the inner liner; the structural layer can be made of high-strength fiber materials, can provide axial tension and annular pressure required during working, and has high strength and good fatigue resistance; the protective layer can be made of thermoplastic resin materials and can play a role in protection in the transportation, operation and working processes.
In a preferred embodiment, as shown in fig. 5 and 6, the downhole safety valve 3 includes a valve tube 3-1, a traveling tube 3-2, an upper joint 3-3, a lower joint 3-4, a spring 3-5, a pin 3-6, and a valve flap 3-7.
A moving pipe 3-2 is movably inserted in the valve pipe 3-1, the top of the valve pipe 3-1 is connected with a hardware fitting 4 through an upper connector 3-3, and the bottom of the valve pipe 3-1 is connected with a production packer 2 through a lower connector 3-4. The lower part of the upper connector 3-3 extends into the valve pipe 3-1 to form an annular hydraulic cavity II with the inner part of the valve pipe 3-1, a hydraulic oil channel 3-3-1 is further arranged on the upper connector 3-3, one end of the hydraulic oil channel 3-3-1 is connected with the electro-hydraulic control conversion device 8, the other end of the hydraulic oil channel 3-3-1 is connected with the hydraulic cavity II, the hydraulic cavity II is located above the traveling pipe 3-2, and hydraulic oil in the hydraulic cavity II is used for providing downward pressure for the traveling pipe 3-2. The upper outer side of the moving pipe 3-2 is provided with a circular end ring, an annular cavity among the circular end ring, the valve pipe 3-1 and the moving pipe 3-2 is provided with a spring 3-5, and the spring 3-5 is used for providing upward pressure for the moving pipe 3-2. The valve is characterized in that a pin shaft 3-6 is arranged below the movable pipe 3-2 and on the inner side of the bottom of the valve pipe 3-1, the pin shaft 3-6 is movably connected with one end of a valve clack 3-7, and the valve clack 3-7 can rotate around the pin shaft 3-6, so that the valve clack 3-7 is switched between a transverse state and a longitudinal state. The pin shaft 3-6 is also sleeved with a reset torsion spring for resetting the valve clack 3-7. The electro-hydraulic control conversion device 8 controls the movable pipe 3-2 to move downwards or upwards by controlling hydraulic oil to flow into or flow out of the hydraulic cavity II, and further controls the valve clack 3-7 to be in a longitudinal state or a transverse state, so that the flow channel III of the movable pipe 3-2 is communicated or closed. The spring 3-5 works by the elasticity of itself, is compressed when hydraulic pressure exists, and the floating pipe 3-2 moves downwards to open the valve clack 3-7; when the hydraulic pressure is discharged, the movable pipe 3-2 moves upwards by means of the elasticity of the spring 3-5, and the valve clack 3-7 is closed under the action of the reset torsion spring.
In a preferred embodiment, the bottom of the production packer 2 is provided with a connecting pipe 2-1, the bottom of the valve pipe 3-1 is connected with an electric submersible pump unit 9 through the connecting pipe 2-1, and the downhole safety valve 3 is arranged at the bottom of a well near the electric submersible pump unit 9, so that once an abnormal condition occurs at the bottom of the well, the fluid can be cut off at the first time, and the instant response to the abnormal condition is realized.
In a preferred embodiment, as shown in FIG. 7, the electro-hydraulic control conversion device 8 comprises a shell 8-1, a connecting piece 8-2, a tail cover 8-3, a front cover 8-4, an oil storage capsule 8-5, a motor 8-6, a speed reducer 8-7, a high-pressure pump 8-8 and an electromagnetic overflow valve 8-9.
The top of the shell 8-1 is fixedly connected with a tail cover 8-3 through a connecting piece 8-2, the bottom of the shell 8-1 is fixedly connected with a front cover 8-4, a containing space among the shell 8-1, the tail cover 8-3 and the front cover 8-4 forms a shell inner cavity IV, and quantitative low-pressure hydraulic oil is contained in the shell inner cavity IV. An opening for placing an elastic oil storage capsule 8-5 is formed in the tail cover 8-3, the inner cavity of the oil storage capsule 8-5 is connected with the inner cavity IV of the shell, the top of the oil storage capsule 8-5 is connected with the cavity V formed by the tail cover 8-3 and the upper space of the oil sleeve annulus I above the production packer 2, and the oil storage capsule 8-5 separates the sealed inner cavity IV of the shell from the external space.
The motor 8-6, the speed reducer 8-7, the high-pressure pump 8-8 and the electromagnetic overflow valve 8-9 are arranged in the inner cavity IV of the shell, the input end of the motor 8-6 is connected with one end of a motor power line 8-10, the other end of the motor power line 8-10 penetrates out of the oil storage capsule 8-5 and is connected with a cable led out by the tail cover 8-3 connecting hardware fitting 4, the cable is embedded in the pipe wall of the composite material continuous oil production pipe 5 and is connected with a power supply device positioned on an offshore platform after being led out from the top of the composite material continuous oil production pipe 5, and therefore power is supplied to the motor 8-6.
The output end of the motor 8-6 is connected with a high-pressure pump 8-8 through a speed reducer 8-7, and the high-pressure pump 8-8 is used for pressurizing low-pressure hydraulic oil in the inner cavity IV of the shell. The outlet end A of the main path of the oil outlet line 8-8-1 of the high-pressure pump 8-8 penetrates out of the front cover 8-4 and is connected with the hydraulic oil channel 3-3-1 and the exhaust valve 7 of the underground safety valve 3 through the oil supply line 11. An outlet end B of an oil outlet pipeline bypass of the high-pressure pump 8-8 is connected with an electromagnetic overflow valve 8-9 through an overflow pipeline 8-11, an outlet C of the electromagnetic overflow valve 8-9 is communicated with an inner cavity IV of the shell, the electromagnetic overflow valve 8-9 is also connected with a motor power line 8-10, the electromagnetic overflow valve 8-9 has two working states of overflow and unloading, and when a power supply device of the offshore platform supplies power to the electromagnetic overflow valve 8-9 through the motor power line 8-10, the electromagnetic overflow valve 8-9 is in an overflow state; when the power supply device of the offshore platform stops supplying power to the electromagnetic overflow valves 8-9 through the power lines 8-10 of the motor, the electromagnetic overflow valves 8-9 are in an unloading state.
The control method of the non-metal composite continuous pipe oil production system for the offshore platform of the invention is described in detail by the specific embodiment, and comprises the following steps:
1) as shown in fig. 5, when the utility model discloses an oil recovery system is in when normal operating condition, and offshore platform's power supply unit is the power supply of electricity liquid accuse conversion equipment 8 through the cable that gold utensil 4 was drawn forth, and electricity liquid accuse conversion equipment 8 provides hydraulic oil to relief valve 3 and discharge valve 7 in the pit, and relief valve 3 and discharge valve 7 in the pit open, and the fluid in the pit continues upward flow entering combined material continuous oil production pipe 5 through relief valve 3 in the pit, specifically is:
1.1) when the oil extraction system is in a normal operation state, a power supply device of the offshore platform supplies power to a motor 8-6 and an electromagnetic overflow valve 8-9 through a motor power line 8-10, the motor 8-6 drives a high-pressure pump 8-8 to operate through a speed reducer 8-7, the electromagnetic overflow valve 8-9 is in an overflow state, and an exhaust valve 7 is opened.
1.2) the high-pressure pump 8-8 pressurizes the low-pressure hydraulic oil in the inner cavity IV of the shell, and the pressurized high-pressure hydraulic oil enters the hydraulic cavity II of the underground safety valve 3 through an oil outlet pipeline.
1.3) in the process of pumping out the hydraulic oil of the high-pressure pump 8-8, the annular pressure outside the oil storage capsule 8-5 presses the oil storage capsule 8-5 to reduce the volume of the oil storage capsule, so that the pressure of the inner cavity IV of the shell is kept constant.
1.4) when the pressure in the hydraulic cavity II is larger than the elastic force of the spring 3-5, the traveling pipe 3-2 moves downwards to push the valve clack 3-7, the valve clack 3-7 rotates 90 degrees around the pin shaft 3-6 anticlockwise, the valve clack 3-7 abuts against the inner wall of the valve pipe 3-1 to reach a longitudinal state, so that the flow channel III of the traveling pipe 3-2 is communicated, and at the moment, fluid can continuously flow upwards through the underground safety valve 3 to enter the composite continuous oil production pipe 5.
1.5) the motor 8-6 drives the high-pressure pump 8-8 to continuously operate, when the pressure of the pressurized high-pressure hydraulic oil reaches the valve opening value of the underground safety valve 3, the high-pressure hydraulic oil cannot continuously flow into the hydraulic cavity II of the underground safety valve 3, so that the hydraulic value in the hydraulic cavity II keeps the valve opening value, and the pressure keeping the normally open state is provided for the underground safety valve 3.
1.6) high-pressure hydraulic oil pumped out subsequently is discharged back to the inner cavity IV of the shell through an overflow pipeline 8-11 and an electromagnetic overflow valve 8-9, so that the internal and external pressures of the oil storage capsule 8-5 are kept in a dynamic balance state.
2) As shown in fig. 6, when the utility model discloses an oil recovery system is in abnormal state (for example the platform has a power failure suddenly or because the condition such as blowout, conflagration is artifical controls the shut-in well), and electro-hydraulic control conversion equipment 8 stops to provide hydraulic oil to downhole safety valve 3 and discharge valve 7, and downhole safety valve 3 and discharge valve 7 are closed, and the fluid can't continue the upflow through downhole safety valve 3 and get into combined material continuous oil production pipe 5, specifically is:
2.1) when the oil extraction system is abnormal, the power supply device of the offshore platform cuts off the power supply to the motor 8-6 and the electromagnetic overflow valve 8-9, the high-pressure pump 8-8 stops running, the electromagnetic overflow valve 8-9 is in an unloading state, at the moment, the electro-hydraulic control conversion device 8 stops supplying oil to the underground safety valve 3 and the exhaust valve 7, the exhaust valve 7 is closed, and the sealing performance of the upper oil sleeve annulus I is guaranteed.
2.2) the hydraulic oil in the hydraulic cavity II of the underground safety valve 3 flows back to the oil outlet pipeline and is discharged into the inner cavity IV of the shell through the overflow pipeline 8-11 and the electromagnetic overflow valve 8-9 in the unloading state, and the pressure in the hydraulic cavity II is gradually reduced.
2.3) when the pressure in the hydraulic cavity II is smaller than the elastic force of the spring 3-5, the moving pipe 3-2 moves upwards under the action of the elastic force of the spring 3-5, the valve clack 3-7 loses the thrust of the moving pipe 3-2, the valve clack 3-7 rotates clockwise 90 degrees around the pin shaft 3-6 under the action of the reset torsion spring, and reaches a transverse state, so that the flow channel III of the moving pipe 3-2 is blocked, and fluid cannot continuously flow upwards through the underground safety valve 3 and enter the composite material continuous oil production pipe 5.
Above-mentioned each embodiment only is used for explaining the utility model discloses, wherein structure, connected mode and the preparation technology etc. of each part all can change to some extent, all are in the utility model discloses equal transform and improvement of going on technical scheme's the basis all should not exclude outside the protection scope of the utility model.
Claims (10)
1. A nonmetal composite continuous pipe oil production system for an offshore platform is characterized by comprising a production casing pipe, a production packer, an underground safety valve, a composite continuous oil production pipe, an exhaust valve, an electro-hydraulic control conversion device and an electric submersible pump unit;
the production packer is fixedly arranged in the production casing, the downhole safety valve is arranged at the top of the production packer, the top of the downhole safety valve is fixedly connected with the bottom of the composite continuous oil production pipe through a hardware fitting, and the downhole safety valve is used for controlling the communication or closing of a flow passage of the composite continuous oil production pipe; the top of the composite material continuous oil production pipe is connected with a wellhead Christmas tree; an oil sleeve annulus is formed between the production casing and the composite material continuous oil production pipe;
the two sides of the top of the production packer are respectively provided with the exhaust valve and the electro-hydraulic control conversion device, and the electro-hydraulic control conversion device is also respectively connected with the underground safety valve and the exhaust valve; the bottom of the production packer is fixedly connected with the electric submersible pump unit used for lifting the downhole fluid to the ground;
the electro-hydraulic control conversion device is also connected with a power supply device positioned on the offshore platform and used for supplying power to all electric components of the nonmetal composite continuous pipe oil production system.
2. The non-metallic composite coiled tubing production system for offshore platforms as in claim 1, wherein the downhole safety valve comprises a valve tube, a traveling tube, a spring, a pin, and a flap;
the movable pipe is movably inserted into the valve pipe, the top of the valve pipe is connected with the hardware fitting through an upper connector, and the bottom of the valve pipe is connected with the production packer through a lower connector;
the lower part of the upper joint extends into the valve pipe to form a hydraulic cavity with the interior of the valve pipe, a hydraulic oil channel is further arranged on the upper joint, one end of the hydraulic oil channel is connected with the electro-hydraulic control conversion device, the other end of the hydraulic oil channel is connected with the hydraulic cavity, the hydraulic cavity is located above the traveling pipe, and hydraulic oil in the hydraulic cavity is used for providing downward pressure for the traveling pipe;
an end ring is arranged on the outer side of the upper part of the traveling pipe, and the annular cavity among the end ring, the valve pipe and the traveling pipe is provided with the spring for providing upward pressure for the traveling pipe; the valve is characterized in that the valve is positioned below the movable pipe, the pin shaft is arranged on the inner side of the bottom of the valve pipe, the pin shaft is movably connected with one end of the valve clack, and the valve clack can rotate around the pin shaft to be in a transverse state or a longitudinal state; and the pin shaft is also sleeved with a reset torsion spring for resetting the valve clack.
3. The nonmetal composite continuous pipe oil production system for the offshore platform is characterized in that the electric hydraulic control conversion device comprises a shell, a tail cover, a front cover, an oil storage capsule, a motor, a speed reducer, a high-pressure pump and an electromagnetic overflow valve;
the top of the shell is fixedly connected with the tail cover through a connecting piece, the bottom of the shell is fixedly connected with the front cover, an accommodating space among the shell, the tail cover and the front cover forms a shell inner cavity, and quantitative low-pressure hydraulic oil is contained in the shell inner cavity;
an opening for placing the oil storage capsule is formed in the tail cover, the inner cavity of the oil storage capsule is connected with the inner cavity of the shell, and the top of the oil storage capsule and the cavity formed by the tail cover are connected with an oil sleeve annulus above the production packer;
the motor, the speed reducer, the high-pressure pump and the electromagnetic overflow valve are arranged in the inner cavity of the shell, the input end of the motor is connected with one end of a motor power line, the other end of the motor power line penetrates through the oil storage capsule and is connected with a cable led out by the hardware fitting through the tail cover, and the cable is connected with a power supply device of the offshore platform;
the output end of the motor is connected with the high-pressure pump for pressurizing hydraulic oil in the inner cavity of the shell through the speed reducer; the outlet end of the main oil outlet pipeline path of the high-pressure pump penetrates out of the front cover and is connected with the hydraulic oil channel and the exhaust valve through an oil supply pipeline, the outlet end of the bypass oil outlet pipeline of the high-pressure pump is connected with the electromagnetic overflow valve through an overflow pipeline, and the outlet of the electromagnetic overflow valve is communicated with the inner cavity of the shell; the electromagnetic overflow valve is also connected with a power line of the motor.
4. The nonmetal composite coiled tubing oil production system for the offshore platform is characterized in that a cable led out by the hardware fitting is embedded in the pipe wall of the composite coiled tubing and is connected with a power supply device of the offshore platform after being led out from the top of the composite coiled tubing.
5. The nonmetal composite coiled tubing oil production system for the offshore platform is characterized in that the electromagnetic overflow valve has two working states of overflow and unloading, and is in the overflow state when a power supply device of the offshore platform supplies power to the electromagnetic overflow valve through the power line of the motor; when the power supply device of the offshore platform stops supplying power to the electromagnetic overflow valve through the motor power line, the electromagnetic overflow valve is in an unloading state.
6. The system of claim 2, wherein the bottom of the production packer is provided with a connecting pipe, and the bottom of the valve pipe is connected with the electrical submersible pump unit through the connecting pipe.
7. The non-metallic composite coiled tubing production system for offshore platforms as in claim 1, wherein the composite coiled tubing is of a three-layer tubing structure, the inner layer of the tubing is an inner liner layer, the middle layer is a structural layer, and the outer layer is a protective layer; a hollow channel is formed in the tube body and used for allowing underground crude oil to pass through.
8. The system of claim 7, wherein the lining layer is made of corrosion-resistant high-density polyethylene, and a plurality of power cables and signal cables extending along the length direction of the pipe body are laid on the lining layer.
9. The system of claim 7, wherein the structural layer is made of a high strength fiber material.
10. The system of claim 7, wherein the protective layer is made of a thermoplastic resin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022690612.1U CN213980766U (en) | 2020-11-19 | 2020-11-19 | Non-metal composite coiled tubing oil production system for offshore platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022690612.1U CN213980766U (en) | 2020-11-19 | 2020-11-19 | Non-metal composite coiled tubing oil production system for offshore platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213980766U true CN213980766U (en) | 2021-08-17 |
Family
ID=77264254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022690612.1U Active CN213980766U (en) | 2020-11-19 | 2020-11-19 | Non-metal composite coiled tubing oil production system for offshore platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213980766U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000833A (en) * | 2021-10-27 | 2022-02-01 | 上海飞舟博源石油装备股份有限公司 | Oil production system using combined pipe column as oil production pipe |
-
2020
- 2020-11-19 CN CN202022690612.1U patent/CN213980766U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000833A (en) * | 2021-10-27 | 2022-02-01 | 上海飞舟博源石油装备股份有限公司 | Oil production system using combined pipe column as oil production pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10246972B2 (en) | In-riser power generation | |
| AU2013206914B2 (en) | In-riser hydraulic power recharging | |
| RU2523245C2 (en) | Methods and systems for treatment of oil and gas wells | |
| AU2017350844B2 (en) | Relief well injection spool apparatus and method for killing a blowing well | |
| CN201241664Y (en) | Pipe column for jet pump oil extraction and water injection integrated process | |
| US8893799B2 (en) | Subsurface safety valve including safe additive injection | |
| WO2015104173A2 (en) | Electrical wellhead shutdown system | |
| CN213980766U (en) | Non-metal composite coiled tubing oil production system for offshore platform | |
| CN104963634B (en) | Method for tripping sucker rod | |
| CN111561299B (en) | Liquid drainage and gas production operation system and operation method suitable for engineering ship | |
| CN105781458A (en) | Wellhead pressure relief method during deflagration fracturing of offshore platform | |
| CN206205797U (en) | Oil and gas reservoir type gas storage injection and production well completion pipe string | |
| CN110219610B (en) | Shale gas horizontal well high-pressure pumping bridge plug device | |
| JP7297353B1 (en) | Natural gas hydrate - shallow gas - deep gas multi-source multi-method joint mining system and method | |
| CN101839117B (en) | Annulus safety valve | |
| CN112081535A (en) | Ultra-deep high-sulfur-content gas well completion pipe string and construction method thereof | |
| CN112282706A (en) | Non-metal composite continuous pipe oil production system for offshore platform and control method thereof | |
| CN102116148A (en) | Machine exploitation test pipe string for floating drilling rig | |
| CN210798899U (en) | Shale gas horizontal well high pressure pumping bridging plug device | |
| CN204060657U (en) | Split laminated fracturing pipe column | |
| CN208267830U (en) | A kind of oil field well is just setting electric pump pressurized water injection process pipe string | |
| CN111764858A (en) | Downhole packer for offshore platform | |
| CN212898425U (en) | Miniature downhole fluid station system for controlling downhole safety valve | |
| CN207847589U (en) | A kind of simple Well safety control device for concentric tube column | |
| Bujok et al. | The problem of liquidation of the open eruption by drilling tools |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |