WO2017005216A1 - 一种适用于粒子钻井的双注入泵连续注入方法 - Google Patents

一种适用于粒子钻井的双注入泵连续注入方法 Download PDF

Info

Publication number
WO2017005216A1
WO2017005216A1 PCT/CN2016/089441 CN2016089441W WO2017005216A1 WO 2017005216 A1 WO2017005216 A1 WO 2017005216A1 CN 2016089441 W CN2016089441 W CN 2016089441W WO 2017005216 A1 WO2017005216 A1 WO 2017005216A1
Authority
WO
WIPO (PCT)
Prior art keywords
particle
injection
particles
hydraulic cylinder
cylinder
Prior art date
Application number
PCT/CN2016/089441
Other languages
English (en)
French (fr)
Inventor
李伟成
姚建林
陈晓彬
陈立
冯明
周刚
刘彬
何超
Original Assignee
四川川庆石油钻采科技有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 四川川庆石油钻采科技有限公司 filed Critical 四川川庆石油钻采科技有限公司
Publication of WO2017005216A1 publication Critical patent/WO2017005216A1/zh

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets

Definitions

  • the invention relates to the technical field of oil and gas drilling engineering, in particular to a double injection pump continuous injection method suitable for particle drilling.
  • the conventional drilling method is to use the drilling pressure and rotation of the bottom hole to realize the mechanical rock breaking, and achieve the purpose of drilling.
  • the rock is only broken by the mechanical action of the drill bit.
  • the role of the mud is only to carry the cuttings, and it is impossible to achieve the combined rock breaking effect of hydraulic and mechanical, and there is a problem of slow drilling speed, long cycle and high cost.
  • particle impact drilling technology has been widely used as a revolutionary speed-up technology.
  • Particle impact drilling is a method of assisting the crushing of deep hard formations by injecting spherical steel particles with a diameter of 1-3 mm into the bottom of the well. Drilling technology for strong grinding formations.
  • One of the key factors of particle impact drilling is the particle injection device.
  • the prior art particle injection device usually adopts a single high pressure tank injection structure, which cannot achieve continuous particle injection; and the high pressure tank has large mass and volume, and transportation Inconvenient, the high-pressure area has a wide coverage and high safety risks.
  • the ground unit area is large in pressure and needs to be solidified by cement to strengthen the foundation, which takes a long time and a high cost. Therefore, it is urgent to develop an injection device that can realize continuous particle injection and is convenient to transport and has high safety to meet the needs of the site.
  • the particle vertical injection device disclosed in the patent document can make the particles fall evenly and avoid the accumulation of particles in the bottom of the high-pressure vessel, but the continuous injection of the particles cannot be realized, and the drilling speed is rather limited; the quality and volume of the high-pressure vessel used are large, resulting in The ground unit area has a large pressure, and it is necessary to solidify the foundation through cement curing, which takes a long time and costs.
  • the Chinese Patent Publication No. CN 103195363A discloses a negative pressure jet type particle impact drilling injection device, including a high pressure particle injection tank, and a feed port at the top of the high pressure particle injection tank, bottom
  • the discharge port is arranged, wherein a balance pressure jet tube is installed on one side of the feed port, a jet anti-blocking nozzle is arranged at one end of the balance pressure jet tube, and the other end is placed at the top of the main steam sink, and the jet anti-blocking nozzle is located at the bottom of the high-pressure particle injection tank.
  • a negative pressure particle injection pipe is arranged at the bottom of the discharge port, a nozzle is arranged at one end of the negative pressure particle injection pipe, the nozzle is connected to the main steam, and a regulating pipe is arranged at the bottom of the main steam sink, and the end of the regulating pipe is connected with the outlet of the negative pressure particle injection pipe, and the regulating valve is arranged in the regulating pipe.
  • the negative pressure jet type particle impact drilling injection device disclosed in the patent document adopts a self-rotating jet anti-blocking nozzle to realize omnidirectional and multi-angle agitation of the high-pressure particle injection tank discharge port, which can solve the problem of blockage of the bottom of the high-pressure particle injection tank.
  • the device is also unable to achieve continuous particle injection, and the drilling speed is limited; and the high-pressure particle injection tank used is large in mass and volume, and is inconvenient to install and transport.
  • the Chinese Patent Publication No. CN 102022078A discloses a new type of drilling method, which is characterized in that a set of particle injection system is connected to the pumping line of the drilling pump to be injected.
  • the high-pressure mud in the well is continuously mixed with hard particles with a particle size of 2-8mm, which descends along the drill string until the drill bit, accelerates at the water eye, and impacts the rock at a very high speed to achieve mechanical and particle impact joint.
  • the effect of rock breaking is to increase the drilling speed in the hard formation, and a set of particle separation system is connected in the wellhead mud return pipeline to separate the metal particles from the mixed liquid returned from the bottom of the well and repeat the recycling.
  • the drilling method disclosed in the patent document improves the injection efficiency of particles by using two sets of injection devices which can work separately, but since the two injection devices are independent and cannot be organically linked, the particle separation system is undoubtedly enlarged.
  • the difficulty of cooperation with the particle transport system causes poor continuity of particle injection during the entire particle circulation, resulting in a lower drilling rate.
  • the present invention provides a dual injection pump continuous injection method suitable for particle drilling.
  • a double injection pump continuous injection device is used, and an alternating injection and compression stroke is realized. The sequence is carried out to ensure the continuity of particle injection in the well and effectively improve the efficiency of particle impact drilling.
  • a double injection pump continuous injection method suitable for particle drilling which comprises a particle filling step, a particle mixing step and a particle injection step, which are characterized in that:
  • the particle filling step refers to adding particles into the particle mixing hopper
  • the particle mixing step is to pump the slurry into the particle mixing hopper to thoroughly mix the mud and the particles;
  • the particle injection step refers to mixing the mud and the particles by a double injection pump continuous injection device.
  • the compound is continuously injected into the well.
  • the particle injection speed in the particle injection step is 0.5 to 10 kg/s.
  • the particle injection pressure in the particle injection step is 5 to 55 MPa.
  • the double injection pump continuous injection device comprises a particle mixing hopper connected to the drilling riser through a high pressure pipeline, and a reversing pipe is arranged in the particle mixing hopper, and a swing hydraulic cylinder that drives the reversing pipe to swing left and right is connected to the reversing pipe.
  • a first conveying cylinder and a second conveying cylinder are connected to the particle mixing hopper.
  • the particles and mud enter the first delivery cylinder; at the same time, the second hydraulic cylinder enters the compression stroke, and the particles and mud in the second delivery cylinder are injected into the well through the reversing pipe into the high pressure pipeline.
  • the cycle after the end of the first hydraulic cylinder filling stroke, enters the compression stroke, the second hydraulic cylinder enters the filling stroke, and the continuous injection is continuously performed.
  • the swing hydraulic cylinder comprises a cylinder body, a piston, a piston rod, a swing rod and a spline connected to the swing rod.
  • the piston is connected to the swing rod through a piston rod, and the commutating tube is connected to the spline.
  • the particle mixing hopper is provided with a spiral agitator.
  • the spiral agitator is composed of a spiral stirring rod and a stirring motor that drives the spiral stirring rod.
  • the spiral stirring rod is located in the particle mixing hopper, and the stirring motor is located outside the particle mixing hopper.
  • An arrow type check valve is connected to the high pressure line.
  • the first hydraulic cylinder and the second hydraulic cylinder are both double rod hydraulic cylinders.
  • Two sealing rings are connected in the reversing pipe, and the two sealing rings are respectively located at two ends of the reversing pipe.
  • the spiral stirring rod is provided with a stirring blade, and the stirring blade is slidably connected with the spiral stirring rod.
  • the cross section of the reversing tube is of the "S" shape.
  • the screw conveyor adds the particles separated and stored in the particle drilling recovery device to the particle mixing hopper through the second pipe, and controls the filling speed of the particles by adjusting the screw speed of the screw conveyor. And pumping the slurry into the particle mixing hopper through the slurry pump, and maintaining the particle and mud mixture in the particle mixing hopper between 1/2-2/3 of the volume of the particle mixing hopper; secondly, opening the spiral agitator, stirring the motor Drive the spiral stir bar to stir constantly, fully mix the mud and particles to ensure the uniformity of the particles injected into the well.
  • the first hydraulic cylinder and the second hydraulic cylinder are activated, and the first hydraulic cylinder drives the first piston rod to contract the first piston to enter the filling stroke, and simultaneously
  • the swing hydraulic cylinder is started, and the reversing pipe is swung to the second conveying cylinder, so that the reversing pipe is quickly connected with the second conveying cylinder, and the particles and the mud mixture in the particle mixing hopper are injected into the first conveying cylinder; meanwhile,
  • the second hydraulic cylinder drives the second piston rod to push the second piston into the compression stroke, and squeezes the particles, the mud mixture from the particle mixing hopper and stored in the second conveying cylinder, and the particles and the mud mixture are injected into the high pressure pipeline through the reversing pipe.
  • the second hydraulic cylinder drives the second piston rod to contract the second piston to enter the filling stroke, and the swing hydraulic cylinder swings the reversing tube to the first conveying cylinder and communicates with the first conveying cylinder
  • the first hydraulic cylinder drives the first piston rod to push the first piston to change from the filling stroke to the compression stroke, and the particles and the mud mixture in the first conveying cylinder are injected into the high-pressure pipeline through the reversing pipe, and finally enter the well circulation, and This achieves alternating operation of the first delivery cylinder and the second delivery cylinder to enable continuous injection of particles into the well.
  • the invention in the process of particle impact drilling, continuously injecting mud and particle mixture into the well by using a double injection pump continuous injection device, starting the first hydraulic cylinder, the second hydraulic cylinder and the swing hydraulic cylinder, and the first piston enters the filling stroke
  • the oscillating hydraulic cylinder swings the reversing pipe to the second conveying cylinder and communicates, and the particles and the mud mixture enter the first conveying cylinder; at the same time, the second piston enters the compression stroke, and the particles and the mud mixture in the second conveying cylinder are exchanged.
  • the high pressure pipeline is injected into the pipeline into the well, the first piston enters the compression stroke after the end of the filling stroke, and the second piston enters the filling stroke, and the continuous injection is continuously performed.
  • the first conveying cylinder and the second conveying cylinder can realize the alternate ordering of the filling and the compression stroke by the cooperation of the first hydraulic cylinder and the second hydraulic cylinder and the swing hydraulic cylinder, and the first conveying cylinder and the second conveying cylinder
  • the particles and mud mixture can be injected into the well alternately and continuously, which ensures the continuity of the particle injection in the well, and avoids the deposition of particles in the first conveying cylinder and the second conveying cylinder, thereby effectively improving the working efficiency of the particle impact drilling;
  • Only the first conveying cylinder, the second conveying cylinder and the reversing pipe are in a high pressure state, which greatly reduces the high pressure zone and improves safety; as a complete technical solution, the method can ensure the continuity of particle injection in the drilling process is extremely great. Improve the efficiency of particle impact drilling.
  • the particle injection speed in the particle injection step is 0.5-10 kg/s, and the specific injection speed can not only ensure the performance of the drilling fluid during the drilling process, but also the particle impact rock breaking at the injection speed.
  • the particle impact frequency is more than 10 million times per minute, which has a good impact rock breaking effect and improves drilling efficiency.
  • the particle injection pressure in the particle injection step is 5-55 MPa, and in this specific pressure range, the injection speed of the particles can be effectively ensured, the drilling efficiency is improved, and the drilling riser can be effectively prevented from being damaged, and the particle drilling is ensured. Work stability.
  • the swing hydraulic cylinder comprises a cylinder block, a piston, a piston rod, a swing rod and a spline connected to the swing rod, the piston is connected to the swing rod through a piston rod, and the commutating tube is connected to the spline.
  • the swinging hydraulic cylinder of a specific structure and the swinging rod make the reversing tube flexiblely commutate, which not only has the characteristics of reversing flexibility, but also adopts the structure of spline and swing rod to prolong the service life.
  • a spiral agitator is arranged in the particle mixing hopper, and the spiral agitator is composed of a spiral stirring rod and a stirring motor that drives the spiral stirring rod.
  • the spiral stirring rod is located in the particle mixing hopper, and the stirring motor is located in the particle mixing hopper.
  • the particles and the mud have an initial velocity under the action of centrifugal force, and can be quickly and uniformly mixed together, thereby facilitating the smooth entry of the particles into the well, and effectively preventing the deposition of particles in the high-pressure pipeline.
  • an arrow type check valve is connected to the high-pressure pipeline, and the arrow type check valve can smoothly pass the particles and the mud mixture into the well through the high-pressure pipeline on the one hand, and prevent the particles and the mud mixture from entering the well on the other hand.
  • the mud leakage is harmed in the process of particle injection, and the safety is further improved.
  • the first hydraulic cylinder and the second hydraulic cylinder are double-rod hydraulic cylinders, capable of achieving constant-speed reciprocating motion, facilitating synchronization of the filling stroke and the compression stroke, and enhancing the stability of the continuous injection of the particles into the well, thereby Ensure particle drilling efficiency.
  • two sealing rings are connected in the reversing pipe, and the two sealing rings are respectively located at two ends of the reversing pipe.
  • the sealing ring can be prevented.
  • the leakage of the pressure in the first delivery cylinder or the second delivery cylinder enables the filling stroke and the compression stroke to be stably performed, ensuring that the particles are smoothly injected into the well.
  • a stirring blade is arranged on the spiral stirring rod, and the stirring blade is slidably connected with the spiral stirring rod.
  • the stirring force can be increased, the stirring time can be shortened, and the particles and the slurry can be quickly mixed uniformly, and the stirring blade and the stirring blade are
  • the spiral stirring rod is slidably connected, and the height of the stirring blade in the particle mixing hopper can be flexibly adjusted as needed to make the mixing of the particles and the mud more uniform, further preventing the deposition of particles in the high pressure pipeline.
  • the cross section of the reversing pipe is "S" type, and the specific "S" type reversing pipe is adopted, which makes the reversing process more flexible and convenient, and the reversing pipe is connected with the first conveying cylinder or The second delivery cylinders are connected to each other for rapid communication to ensure continuity of particle injection.
  • FIG. 1 is a schematic view showing the connection structure of a continuous injection device of a double injection pump and a drill floor according to the present invention
  • FIG. 2 is a schematic structural view of a swing hydraulic cylinder of the present invention
  • FIG. 3 is a schematic view showing a connection structure of a continuous injection device of a double injection pump and a drill floor in Embodiment 3 of the present invention
  • FIG. 4 is a schematic structural view of a reversing pipe according to Embodiment 6 of the present invention.
  • FIG. 5 is a schematic view showing a connection structure of a continuous injection device of a double injection pump and a drill floor in Embodiment 6 of the present invention
  • a double injection pump continuous injection method suitable for particle drilling comprises, in order, a particle filling step, a particle mixing step and a particle injection step.
  • the particle filling step refers to adding particles to the particle mixing.
  • the particle mixing step is to pump the slurry into the particle mixing hopper to mix the mud and the particles;
  • the particle injection step refers to continuous injection of the slurry and the particle mixture by using a double injection pump. Inject into the well.
  • the particle filling step refers to injecting particles into the particle mixing hopper 4 connected to the drill floor 3 through the high pressure line 2 through the screw conveyor 1; the particle mixing step means mixing the hopper through the slurry pump 5 to the particles 4: pumping the slurry to thoroughly mix the mud and the particles; the particle injecting step refers to continuously injecting the slurry and the particle mixture into the well by a double injection pump continuous injection device, the double injection pump continuous injection device including the first hydraulic cylinder 6 a second hydraulic cylinder 7, a swing hydraulic cylinder 8, a reversing pipe 9, a first piston 10, a first delivery cylinder 11, a second piston 12, and a second delivery cylinder 13, actuating the first hydraulic cylinder 6, the second hydraulic cylinder 7 and the swing hydraulic cylinder 8, the first piston 10 enters the filling stroke, the swing hydraulic cylinder 8 swings the reversing pipe 9 to the second transfer cylinder 13 and communicates, and the particles and the mud mixture enter the first transfer cylinder 11; The second piston 12 enters the compression stroke, and the particles
  • This embodiment is the most basic embodiment, and has a simple structure.
  • a dual injection pump continuous injection device is continuously injected into the well to start the first hydraulic cylinder, the second hydraulic cylinder and the swing hydraulic cylinder.
  • the first piston enters the filling stroke, the swing hydraulic cylinder swings the reversing tube to the second conveying cylinder and communicates, and the particles and the mud mixture enter the first conveying cylinder; meanwhile, the second piston enters the compression stroke, and the second conveying cylinder
  • the inner particle and mud mixture are injected into the well circulation through the reversing pipe, and the first piston enters the compression stroke after the end of the filling stroke, the second piston enters the filling stroke, and the continuous injection is continuously performed.
  • the first conveying cylinder and the second conveying cylinder can realize the alternate ordering of the filling and the compression stroke by the cooperation of the first hydraulic cylinder and the second hydraulic cylinder and the swing hydraulic cylinder, and the first conveying cylinder and the second conveying cylinder
  • the particles and mud mixture can be injected into the well alternately and continuously, which ensures the continuity of the particle injection in the well, and avoids the deposition of particles in the first conveying cylinder and the second conveying cylinder, thereby effectively improving the working efficiency of the particle impact drilling;
  • Only the first conveying cylinder, the second conveying cylinder and the reversing pipe are in a high pressure state, which greatly reduces the high pressure zone and improves safety; as a complete technical solution, the method can ensure the continuity of particle injection in the drilling process is extremely great. Improve the efficiency of particle impact drilling.
  • a double injection pump continuous injection method suitable for particle drilling comprises, in order, a particle filling step, a particle mixing step and a particle injection step, a, the particle adding step
  • the particle mixing step is to pump the slurry into the particle mixing hopper to thoroughly mix the mud and the particles;
  • the particle injecting step refers to using double injection
  • the pump continuous injection device continuously injects the slurry and particle mixture into the well.
  • the particle injection speed in the particle injection step was 0.5 kg/s.
  • the particle injection pressure in the particle injection step was 5 MPa.
  • the particle filling step refers to injecting particles into the particle mixing hopper 4 connected to the drill floor 3 through the high pressure line 2 through the screw conveyor 1; the particle mixing step means mixing the hopper through the slurry pump 5 to the particles 4: pumping the slurry to thoroughly mix the mud and the particles; the particle injecting step refers to continuously injecting the slurry and the particle mixture into the well by a double injection pump continuous injection device, the double injection pump continuous injection device including the first hydraulic cylinder 6 a second hydraulic cylinder 7, a swing hydraulic cylinder 8, a reversing pipe 9, a first piston 10, a first delivery cylinder 11, a second piston 12, and a second delivery cylinder 13, actuating the first hydraulic cylinder 6, the second hydraulic cylinder 7 and the swing hydraulic cylinder 8, the first piston 10 enters the filling stroke, the swing hydraulic cylinder 8 swings the reversing pipe 9 to the second transfer cylinder 13 and communicates, and the particles and the mud mixture enter the first transfer cylinder 11; The second piston 12 enters the compression stroke, and the particles
  • the swing hydraulic cylinder 8 includes a cylinder block 14, a piston 15, a piston rod 16, a swing rod 17, and a spline 18 connected to the swing rod 17, and the piston 15 is connected to the swing rod 17 through a piston rod 16, and the commutator tube 9 is connected. On the spline 18.
  • the embodiment is a preferred embodiment.
  • the swing hydraulic cylinder includes a cylinder block, a piston, a piston rod, a swing rod and a spline connected to the swing rod.
  • the piston is connected to the swing rod through the piston rod, and the commutating tube is connected to the spline.
  • the swing hydraulic cylinder of the specific structure is adopted, and the swing lever makes the commutating tube flexiblely reversing, which not only has the characteristics of reversing flexibility, but also adopts the structure of spline and swing rod to prolong the service life.
  • a double injection pump continuous injection method suitable for particle drilling comprises, in order, a particle filling step, a particle mixing step and a particle injection step.
  • the particle filling step refers to adding a particle.
  • the particle mixing step is to pump the slurry into the particle mixing hopper to mix the mud and the particles;
  • the particle injection step refers to the continuous injection device using a double injection pump to mud and The particle mixture is continuously injected into the well.
  • the particle injection speed in the particle injection step was 2 kg/s.
  • the particle injection pressure in the particle injection step was 20 MPa.
  • the particle filling step refers to injecting particles into the particle mixing hopper 4 connected to the drill floor 3 through the high pressure line 2 through the screw conveyor 1; the particle mixing step means mixing the hopper through the slurry pump 5 to the particles 4 pumping mud to mix the mud and particles thoroughly; the particle injection step refers to continuously injecting the slurry and particle mixture into the well by a double injection pump continuous injection device.
  • the double injection pump continuous injection device includes a first hydraulic cylinder 6, a second hydraulic cylinder 7, a swing hydraulic cylinder 8, a reversing pipe 9, a first piston 10, a first delivery cylinder 11, a second piston 12, and a second delivery cylinder. 13.
  • the first hydraulic cylinder 6, the second hydraulic cylinder 7, and the swing hydraulic cylinder 8 are activated, the first piston 10 enters a filling stroke, and the swing hydraulic cylinder 8 swings the reversing tube 9 to the second delivery cylinder 13 and communicates with each other.
  • the mud mixture enters the first delivery cylinder 11; at the same time, the second piston 12 enters the compression stroke, and the particles and the mud mixture in the second delivery cylinder 13 are injected into the high pressure pipeline 2 through the reversing pipe 9 to enter the well circulation, and the first piston 10 is added.
  • the compression stroke is entered, the second piston 12 enters the filling stroke, and the continuous injection is alternately operated.
  • the swing hydraulic cylinder 8 includes a cylinder block 14, a piston 15, a piston rod 16, a swing rod 17, and a spline 18 connected to the swing rod 17, and the piston 15 is connected to the swing rod 17 through a piston rod 16, and the commutator tube 9 is connected. On the spline 18.
  • the particle mixing hopper 4 is provided with a spiral agitator 19, and the spiral agitator 19 is composed of a spiral agitating rod 20 and a stirring motor 21 for driving the spiral stirring rod 20, and the spiral stirring rod 20 is located in the particle mixing hopper 4, and is stirred.
  • the motor 21 is located outside the particle mixing hopper 4.
  • the embodiment is a further preferred embodiment.
  • the particle mixing hopper is provided with a spiral agitator.
  • the spiral agitator is composed of a spiral stirring rod and a stirring motor that drives the spiral stirring rod.
  • the spiral stirring rod is located in the particle mixing hopper.
  • the agitating motor is located outside the particle mixing hopper. When it is stirred by a unique spiral agitator, it can form a vortex in the particle mixing hopper.
  • the particles and mud have an initial velocity under the action of centrifugal force, which can be quickly and evenly mixed together, thereby facilitating smooth particles. Into the well, effectively prevent particles from depositing clogging in the high pressure pipeline.
  • a double injection pump continuous injection method suitable for particle drilling comprises, in order, a particle filling step, a particle mixing step and a particle injection step.
  • the particle filling step refers to adding a particle.
  • the particle mixing step is to pump the slurry into the particle mixing hopper to mix the mud and the particles;
  • the particle injection step refers to the continuous injection device using a double injection pump to mud and The particle mixture is continuously injected into the well.
  • the particle injection speed in the particle injection step was 6 kg/s.
  • the particle injection pressure in the particle injection step was 30 MPa.
  • the particle filling step refers to injecting particles into the particle mixing hopper 4 connected to the drill floor 3 through the high pressure line 2 through the screw conveyor 1; the particle mixing step means mixing the hopper through the slurry pump 5 to the particles 4: pumping the slurry to thoroughly mix the mud and the particles; the particle injecting step refers to continuously injecting the slurry and the particle mixture into the well by a double injection pump continuous injection device, the double injection pump continuous injection device including the first hydraulic cylinder 6 a second hydraulic cylinder 7, a swing hydraulic cylinder 8, a reversing pipe 9, a first piston 10, a first delivery cylinder 11, a second piston 12, and a second delivery cylinder 13, actuating the first hydraulic cylinder 6, the second hydraulic cylinder 7 and the swing hydraulic cylinder 8, the first piston 10 enters the filling stroke, and the swing hydraulic cylinder 8 swings the reversing pipe 9 to the second transfer cylinder 13 and communicates with the particles and mud.
  • the slurry mixture enters the first delivery cylinder 11; at the same time, the second piston 12 enters a compression stroke, and the particles and mud mixture in the second delivery cylinder 13 are injected into the high pressure pipeline 2 through the reversing pipe 9 to enter the well circulation, and the first piston 10 is filled.
  • the compression stroke is entered, the second piston 12 enters the filling stroke, and the continuous injection is alternately operated.
  • the swing hydraulic cylinder 8 includes a cylinder block 14, a piston 15, a piston rod 16, a swing rod 17, and a spline 18 connected to the swing rod 17, and the piston 15 is connected to the swing rod 17 through a piston rod 16, and the commutator tube 9 is connected. On the spline 18.
  • the particle mixing hopper 4 is provided with a spiral agitator 19, and the spiral agitator 19 is composed of a spiral agitating rod 20 and a stirring motor 21 for driving the spiral stirring rod 20, and the spiral stirring rod 20 is located in the particle mixing hopper 4, and is stirred.
  • the motor 21 is located outside the particle mixing hopper 4.
  • an arrow type check valve 22 is connected to the high pressure line 2.
  • This embodiment is a further preferred embodiment.
  • An arrow type check valve is connected to the high-pressure pipeline, and the arrow type check valve can smoothly pass the particles and the mud mixture into the well through the high-pressure pipeline on the one hand, and can prevent the particles from being on the other hand.
  • the mud mixture is reversely plunged into the first conveying cylinder or the second conveying cylinder, thereby effectively preventing mud leakage and injuring people during the particle injection process, thereby further improving safety.
  • a double injection pump continuous injection method suitable for particle drilling comprises, in order, a particle filling step, a particle mixing step and a particle injection step, a, the particle filling step means The particles are injected into the particle mixing hopper 4; b.
  • the particle mixing step is to pump the slurry into the particle mixing hopper to mix the mud and the particles; c.
  • the particle injection step refers to a continuous injection device using a double injection pump. The slurry and particle mixture are continuously injected into the well.
  • the particle injection speed in the particle injection step was 8 kg/s.
  • the particle injection pressure in the particle injection step was 40 MPa.
  • the particle filling step refers to injecting particles into the particle mixing hopper 4 connected to the drill floor 3 through the high pressure line 2 through the screw conveyor 1; the particle mixing step means mixing the hopper through the slurry pump 5 to the particles 4: pumping the slurry to thoroughly mix the mud and the particles; the particle injecting step refers to continuously injecting the slurry and the particle mixture into the well by a double injection pump continuous injection device, the double injection pump continuous injection device including the first hydraulic cylinder 6 a second hydraulic cylinder 7, a swing hydraulic cylinder 8, a reversing pipe 9, a first piston 10, a first delivery cylinder 11, a second piston 12, and a second delivery cylinder 13, actuating the first hydraulic cylinder 6, the second hydraulic cylinder 7 and the swing hydraulic cylinder 8, the first piston 10 enters the filling stroke, the swing hydraulic cylinder 8 swings the reversing pipe 9 to the second transfer cylinder 13 and communicates, and the particles and the mud mixture enter the first transfer cylinder 11; The second piston 12 enters the compression stroke, and the particles
  • the swing hydraulic cylinder 8 includes a cylinder block 14, a piston 15, a piston rod 16, a swing rod 17 and a connection On the spline 18 on the pendulum rod 17, the piston 15 is connected to the pendulum rod 17 via a piston rod 16, and the reversing tube 9 is connected to the spline 18.
  • the particle mixing hopper 4 is provided with a spiral agitator 19, and the spiral agitator 19 is composed of a spiral agitating rod 20 and a stirring motor 21 for driving the spiral stirring rod 20, and the spiral stirring rod 20 is located in the particle mixing hopper 4, and is stirred.
  • the motor 21 is located outside the particle mixing hopper 4.
  • An arrow type check valve 22 is connected to the high pressure line 2.
  • first hydraulic cylinder 6 and the second hydraulic cylinder 7 are both double-rod hydraulic cylinders.
  • Two sealing rings 23 are connected in the reversing pipe 9, and two sealing rings 23 are respectively located at both ends of the reversing pipe 9.
  • the first hydraulic cylinder and the second hydraulic cylinder are double-rod hydraulic cylinders, which can realize constant-speed reciprocating motion, and are convenient for realizing the synchronization of the filling stroke and the compression stroke, and enhancing the continuous injection of particles.
  • the stability of the well ensures the efficiency of particle drilling.
  • a double injection pump continuous injection method suitable for particle drilling comprises, in order, a particle filling step, a particle mixing step and a particle injection step, a, the particle filling step means The particles are injected into the particle mixing hopper 4; b.
  • the particle mixing step is to pump the slurry into the particle mixing hopper to mix the mud and the particles; c.
  • the particle injection step refers to a continuous injection device using a double injection pump. The slurry and particle mixture are continuously injected into the well.
  • the particle injection speed in the particle injection step was 10 kg/s.
  • the particle injection pressure in the particle injection step was 55 MPa.
  • the particle filling step refers to injecting particles into the particle mixing hopper 4 connected to the drill floor 3 through the high pressure line 2 through the screw conveyor 1; the particle mixing step means mixing the hopper through the slurry pump 5 to the particles 4: pumping the slurry to thoroughly mix the mud and the particles; the particle injecting step refers to continuously injecting the slurry and the particle mixture into the well by a double injection pump continuous injection device, the double injection pump continuous injection device including the first hydraulic cylinder 6 a second hydraulic cylinder 7, a swing hydraulic cylinder 8, a reversing pipe 9, a first piston 10, a first delivery cylinder 11, a second piston 12, and a second delivery cylinder 13, actuating the first hydraulic cylinder 6, the second hydraulic cylinder 7 and the swing hydraulic cylinder 8, the first piston 10 enters the filling stroke, the swing hydraulic cylinder 8 swings the reversing pipe 9 to the second transfer cylinder 13 and communicates, and the particles and the mud mixture enter the first transfer cylinder 11; The second piston 12 enters the compression stroke, and the particles
  • spiral stirring rod 20 is provided with a stirring blade 24, the stirring blade 24 and the spiral
  • the stirring rod 20 is slidably connected.
  • the cross section of the reversing tube 9 is of the "S" shape.
  • This embodiment is a preferred embodiment.
  • the slurry and particle mixture are continuously injected into the well by a double injection pump continuous injection device, and the first hydraulic cylinder, the second hydraulic cylinder and the swing hydraulic cylinder are started, and the first piston Entering the filling stroke, the swing hydraulic cylinder swings the reversing pipe to the second conveying cylinder and communicates, and the particles and the mud mixture enter the first conveying cylinder; meanwhile, the second piston enters the compression stroke, and the particles in the second conveying cylinder,
  • the mud mixture is injected into the well circulation through the reversing pipe, and the first piston enters the compression stroke after the end of the filling stroke, and the second piston enters the filling stroke, and the continuous injection is continuously performed.
  • the first conveying cylinder and the second conveying cylinder can realize the alternate ordering of the filling and the compression stroke by the cooperation of the first hydraulic cylinder and the second hydraulic cylinder and the swing hydraulic cylinder, and the first conveying cylinder and the second conveying cylinder
  • the particles and mud mixture can be injected into the well alternately and continuously, which ensures the continuity of the particle injection in the well, and avoids the deposition of particles in the first conveying cylinder and the second conveying cylinder, thereby effectively improving the working efficiency of the particle impact drilling; Only the first conveying cylinder, the second conveying cylinder and the reversing pipe are in a high pressure state, which greatly reduces the high pressure zone and improves safety; as a complete technical solution, the method can ensure the continuity of particle injection in the drilling process is extremely great.
  • the spiral stirring rod is provided with a stirring blade, and the stirring blade is slidably connected with the spiral stirring rod.
  • the stirring force can be increased, the stirring time is shortened, the particles and the mud can be quickly mixed uniformly, and the stirring blade is slidably connected with the spiral stirring rod.
  • the height of the stirring blade in the particle mixing hopper can be flexibly adjusted as needed to make the mixing of the particles and the mud more uniform, further preventing the deposition of particles in the high pressure pipeline.
  • the cross-section of the reversing pipe is "S" type, and the specific "S" type reversing pipe is adopted to make the reversing process more flexible and convenient.
  • the reversing pipe is connected with the first conveying cylinder or the second conveying cylinder. , can be quickly connected to ensure the continuity of particle injection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Reciprocating Pumps (AREA)

Abstract

一种适用于粒子钻井的双注入泵连续注入方法，属于油气钻井工程技术领域，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，其特征在于：a、所述粒子添注步骤是指将粒子添注到粒子混合料斗（4）内；b、所述粒子混合步骤是指向粒子混合料斗（4）内泵送泥浆，将泥浆和粒子充分混合；c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。本发明粒子注入步骤中采用双注入泵连续注入装置，实现了添注和压缩冲程的交替有序进行，保证了井内粒子注入的连续性，有效提高了粒子冲击钻井效率。

Description

一种适用于粒子钻井的双注入泵连续注入方法 技术领域
本发明涉及到油气钻井工程技术领域，尤其涉及一种适用于粒子钻井的双注入泵连续注入方法。
背景技术
目前常规的钻井方法是利用井底钻头的钻压和旋转实现机械破岩，达到钻进的目的，这种方式在遇到深部硬地层和强研磨地层时，仅依靠钻头的机械作用进行破岩，泥浆的作用只是携带岩屑，无法实现水力加机械的联合破岩效果，存在钻速慢、周期长、成本高的问题。
近年来，粒子冲击钻井技术作为一项革命性的提速技术，得到了广泛的应用；粒子冲击钻井是一种通过将直径1-3毫米的球形钢粒注入井底，以辅助破碎深部硬地层和强研磨地层的钻井技术。粒子冲击钻井效果的好坏，其中一个关键因子便是粒子注入装置，现有技术的粒子注入装置通常采用单高压罐式注入结构，无法实现粒子连续注入；且高压罐质量和体积较大，运输不方便，高压区覆盖面广，安全风险高；此外，还存在地面单位面积承压大，需通过水泥固化加强地基，耗时长、费用高的问题。因此亟需研制一种可实现粒子连续注入，且运输方便、安全性高的注入装置，以满足现场需求。
公开号为CN 203742449U，公开日为2014年07月30日的中国专利文献公开了一种粒子立式注入装置，其特征在于：包括高压容器，高压容器的上部设置进料管，底部设置出料管，出料管上设置倾斜出口，高压容器内设置旋转轴，旋转轴上设置螺旋齿，旋转轴和高压容器的顶部和底部之间分别设置上密封体和下密封体，上密封体和旋转轴之间、下密封体和旋转轴之间均设置轴承，上下端的轴承外侧分别设置上端盖和下端盖，上端盖上轴向设置泄压孔，旋转轴底部通过联轴器连接电机，电机通过支撑筋固定在支腿上，高压容器固定在支腿上，倾斜出口连接高压液动阀，高压液动阀连接高压三通。
该专利文献公开的粒子立式注入装置，虽然可使粒子均匀下落，避免粒子在高压容器底部堆积，但是，无法实现粒子连续注入，钻井速度相当有限；采用的高压容器质量和体积较大，造成地面单位面积承压大，需通过水泥固化加强地基，耗时长、费用高。
公开号为CN 103195363A，公开日为2013年07月10日的中国专利文献公开了一种负压射流式粒子冲击钻井注入装置，包括高压粒子注入罐，高压粒子注入罐顶部设置进料口，底部设置出料口，其特征在于：进料口一侧安装平衡压力射流管，平衡压力射流管一端设置射流防堵喷头，另一端置于主管汇顶部，射流防堵喷头位于高压粒子注入罐底部，出料口底部设置负压粒子注入管，负压粒子注入管一端设置喷嘴，喷嘴连通主管汇，主管汇底部设置调节管，调节管末端连通负压粒子注入管出口，调节管内设置调节阀。
该专利文献公开的负压射流式粒子冲击钻井注入装置，采用自旋转式射流防堵喷头，对高压粒子注入罐出料口实现全方位、多角度搅动，能够解决高压粒子注入罐底部堵塞问题，但是，该装置同样无法实现粒子连续注入，钻井速度受到限制；而且采用的高压粒子注入罐质量和体积较大，安装和运输都较为不便。
公开号为CN 102022078A，公开日为2011年04月20日的中国专利文献公开了一种新型的钻井方法，其特征是：在钻井泵的泵出管路上连接一套粒子注入***，使要注入井内的高压泥浆中不断地混入坚硬的粒径在2-8mm范围的粒子，其沿钻柱下行直到钻头，在水眼处得以加速，以极高的速度冲击岩石，从而达到机械与粒子冲击联合破岩的效果，提高坚硬地层中的钻进速度，在井口泥浆返回管路中连接一套粒子分离***，将金属颗粒从井底返回的混合液中分离出来，重复循环利用。
该专利文献公开的钻井方法，通过采用两套能分别单独工作的注入装置来提高粒子的注入效率，但是由于两套注入装置各自独立，不能有机联系在一起，无疑增大了其与粒子分离***和粒子输送***相互间的配合难度，造成整个粒子循环过程中粒子注入连续性差，致使钻井速率较低。
发明内容
本发明为了克服上述现有技术的缺陷，提供一种适用于粒子钻井的双注入泵连续注入方法，本发明粒子注入步骤中采用双注入泵连续注入装置，实现了添注和压缩冲程的交替有序进行，保证了井内粒子注入的连续性，有效提高了粒子冲击钻井效率。
本发明通过下述技术方案实现：
一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，其特征在于：
a、所述粒子添注步骤是指将粒子添注到粒子混合料斗内；
b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；
c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混 合物连续注入井内。
所述粒子注入步骤中的粒子注入速度为0.5-10kg/s。
所述粒子注入步骤中的粒子注入压力为5-55MPa。
所述双注入泵连续注入装置，包括通过高压管线与钻井立管连接的粒子混合料斗，粒子混合料斗内设置有换向管，换向管上连接有驱动换向管左右摆动的摆动液压缸，粒子混合料斗上连接有第一输送缸和第二输送缸，粒子注入时，首先启动第一液压缸、第二液压缸和摆动液压缸，第一液压缸进入添注冲程，摆动液压缸将换向管摆动到第二输送缸处并连通，粒子和泥浆进入第一输送缸内；同时第二液压缸进入压缩冲程，将第二输送缸内的粒子和泥浆通过换向管注入高压管线进入井内循环，第一液压缸添注冲程结束后进入压缩冲程，第二液压缸进入添注冲程，交替运行连续注入。
所述摆动液压缸包括缸体、活塞、活塞杆、摆杆和连接在摆杆上的花键，活塞通过活塞杆与摆杆连接，换向管连接在花键上。
所述粒子混合料斗内设置有螺旋式搅拌器，螺旋式搅拌器由螺旋搅拌棒和驱动螺旋搅拌棒转动的搅拌电机构成，螺旋搅拌棒位于粒子混合料斗内，搅拌电机位于粒子混合料斗外。
所述高压管线上连接有箭型止回阀。
所述第一液压缸和第二液压缸均为双杆液压缸。
所述换向管内连接有两个密封圈，两个密封圈分别位于换向管的两端。
所述螺旋搅拌棒上设置有搅拌叶片，搅拌叶片与螺旋搅拌棒滑动连接。
所述换向管的横截面呈“S”型。
本发明的工作原理如下：
在粒子冲击钻井过程中，首先螺杆输送机将粒子钻井回收装置中分离储存的粒子通过第二管道添注至粒子混合料斗内，并通过调整螺杆输送机的螺杆转速来控制粒子的添注速度，并通过渣浆泵向粒子混合料斗内泵送泥浆，并维持粒子混合料斗内粒子、泥浆混合物占粒子混合料斗容积的1/2-2/3之间；其次，打开螺旋式搅拌器，搅拌电机带动螺旋搅拌棒不断搅动，充分混合泥浆和粒子，以保证粒子注入井内的均匀性。最后，当粒子混合料斗内粒子、泥浆混合物达到其容积的1/2时，启动第一液压缸和第二液压缸，第一液压缸驱动第一活塞杆收缩第一活塞进入添注冲程，同时摆动液压缸启动，摆动换向管到第二输送缸处，使换向管迅速与第二输送缸连通，粒子混合料斗内的粒子、泥浆混合物便添注入第一输送缸内；与此同时，第二液压缸驱动第二活塞杆推动第二活塞进入压缩冲程，挤压来自粒子混合料斗并储存在第二输送缸内的粒子、泥浆混合物，粒子、泥浆混合物通过换向管注入高压管线内，并最终进入井内循环；当第二活塞 运动至极限位置，压缩冲程结束，第二液压缸驱动第二活塞杆收缩第二活塞进入添注冲程，摆动液压缸再将换向管摆动到第一输送缸处，并与第一输送缸连通，第一液压缸驱动第一活塞杆推动第一活塞由添注冲程转为压缩冲程，将第一输送缸内的粒子、泥浆混合物通过换向管注入高压管线内，并最终进入井内循环，自此实现了第一输送缸和第二输送缸的交替运行，使粒子能够被连续注入井内。
本发明的有益效果主要表现在以下方面：
一、本发明，在粒子冲击钻井过程中，采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，启动第一液压缸、第二液压缸和摆动液压缸，第一活塞进入添注冲程，摆动液压缸将换向管摆动到第二输送缸处并连通，粒子、泥浆混合物进入第一输送缸内；同时第二活塞进入压缩冲程，将第二输送缸内的粒子、泥浆混合物通过换向管注入高压管线进入井内循环，第一活塞添注冲程结束后进入压缩冲程，第二活塞进入添注冲程，交替运行连续注入。第一输送缸、第二输送缸通过第一液压缸和第二液压缸以及摆动液压缸的配合，能够实现添注和压缩冲程的交替有序进行，第一输送缸、第二输送缸内的粒子、泥浆混合物能够交替连续的向井内注入，保证了井内粒子注入的连续性，同时避免第一输送缸和第二输送缸内粒子沉积堵塞，有效提高粒子冲击钻井的工作效率；在整个装置中仅第一输送缸、第二输送缸、换向管为高压状态，大大降低了高压区，提高了安全性；作为一个完整的技术方案，该方法能够保证钻井过程中粒子注入的连续性极大的提高了粒子冲击钻井效率。
二、本发明，粒子注入步骤中的粒子注入速度为0.5-10kg/s，采用该特定的注入速度，不仅能够在钻井过程中保证钻井液的性能，而且在该注入速度下，粒子冲击破岩的粒子冲击频率大于1000万次/分钟，具有良好的冲击破岩效果，提高了钻井效率。
三、本发明，粒子注入步骤中的粒子注入压力为5-55Mpa，在该特定的压力范围，能够有效保证粒子的注入速度，提高钻井效率，而且能够有效防止钻井立管受到损害，保证粒子钻井工作稳定性。
四、本发明，摆动液压缸包括缸体、活塞、活塞杆、摆杆和连接在摆杆上的花键，活塞通过活塞杆与摆杆连接，换向管连接在花键上，采用此种特定结构的摆动液压缸，摆杆使换向管灵活的换向，不仅具有换向灵活的特点，而且采用花键、摆杆的这种结构延长了使用寿命。
五、本发明，粒子混合料斗内设置有螺旋式搅拌器，螺旋式搅拌器由螺旋搅拌棒和驱动螺旋搅拌棒转动的搅拌电机构成，螺旋搅拌棒位于粒子混合料斗内，搅拌电机位于粒子混合料斗外，采用独特的螺旋式搅拌器搅 拌时，能够在粒子混合料斗内形成漩涡，粒子和泥浆在离心力作用下具备初速度，能够快速均匀的混合在一起，从而利于粒子顺畅的进入井内，有效防止粒子在高压管线内沉积堵塞。
六、本发明，高压管线上连接有箭型止回阀，采用箭型止回阀一方面能够使粒子、泥浆混合物顺畅的经高压管线进入井内，另一方面能够防止粒子、泥浆混合物逆窜入第一输送缸或第二输送缸内，有效避免粒子注入过程中泥浆泄漏伤人，进一步提高安全性。
七、本发明，第一液压缸和第二液压缸均为双杆液压缸，能够实现等速往复运动，便于实现添注冲程和压缩冲程的同步性，增强粒子连续注入井内的稳定性，从而保证粒子钻井工作效率。
八、本发明，换向管内连接有两个密封圈，两个密封圈分别位于换向管的两端，当换向管与第一输送缸或第二输送缸接通时，密封圈能够防止第一输送缸或第二输送缸内压力的泄漏，使添注冲程和压缩冲程都能够稳定的进行，保证粒子顺利的注入井内。
九、本发明，螺旋搅拌棒上设置有搅拌叶片，搅拌叶片与螺旋搅拌棒滑动连接，通过设置搅拌叶片能够增大搅拌力度，缩短搅拌时间，使粒子和泥浆能够迅速混合均匀，而搅拌叶片与螺旋搅拌棒滑动连接，可以根据需要灵活的调节搅拌叶片在粒子混合料斗内的高度，以使粒子和泥浆能够混合的更加均匀，进一步防止粒子在高压管线内沉积堵塞。
十、本发明，换向管的横截面呈“S”型，采用特定的“S”型换向管，使换向过程更加灵活方便，换向管无论是与第一输送缸连接，还是与第二输送缸连接，均能快速的连通，以保证粒子注入的连续性。
附图说明
图1为本发明双注入泵连续注入装置与钻台的连接结构示意图；
图2为本发明摆动液压缸的结构示意图；
图3为本发明实施例3中双注入泵连续注入装置与钻台的连接结构示意图；
图4为本发明实施例6中换向管的结构示意图；
图5为本发明实施例6中双注入泵连续注入装置与钻台的连接结构示意图；
图中标记：1、螺杆输送机，2、高压管线，3、钻台，4、粒子混合料斗，5、渣浆泵，6、第一液压缸，7、第二液压缸，8、摆动液压缸，9、换向管，10、第一活塞，11、第一输送缸，12、第二活塞，13、第二输送缸，14、缸体，15、活塞，16、活塞杆，17、摆杆，18、花键，19、螺旋式搅拌器，20、螺旋搅拌棒，21、搅拌电机，22、箭型止回阀，23、密封圈，24、搅拌叶片。
具体实施方式
实施例1
参见图1，一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，a、所述粒子添注步骤是指将粒子添注到粒子混合料斗4内；b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。
所述粒子添注步骤是指通过螺杆输送机1将粒子添注到通过高压管线2与钻台3连接的粒子混合料斗4内；所述粒子混合步骤是指通过渣浆泵5向粒子混合料斗4内泵送泥浆，将泥浆和粒子充分混合；所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，所述双注入泵连续注入装置包括第一液压缸6、第二液压缸7、摆动液压缸8、换向管9、第一活塞10、第一输送缸11、第二活塞12和第二输送缸13，启动第一液压缸6、第二液压缸7和摆动液压缸8，第一活塞10进入添注冲程，摆动液压缸8将换向管9摆动到第二输送缸13处并连通，粒子、泥浆混合物进入第一输送缸11内；同时第二活塞12进入压缩冲程，将第二输送缸13内的粒子、泥浆混合物通过换向管9注入高压管线2进入井内循环，第一活塞10添注冲程结束后进入压缩冲程，第二活塞12进入添注冲程，交替运行连续注入。
本实施例为最基本的实施方式，结构简单，在粒子冲击钻井过程中，采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，启动第一液压缸、第二液压缸和摆动液压缸，第一活塞进入添注冲程，摆动液压缸将换向管摆动到第二输送缸处并连通，粒子、泥浆混合物进入第一输送缸内；同时第二活塞进入压缩冲程，将第二输送缸内的粒子、泥浆混合物通过换向管注入高压管线进入井内循环，第一活塞添注冲程结束后进入压缩冲程，第二活塞进入添注冲程，交替运行连续注入。第一输送缸、第二输送缸通过第一液压缸和第二液压缸以及摆动液压缸的配合，能够实现添注和压缩冲程的交替有序进行，第一输送缸、第二输送缸内的粒子、泥浆混合物能够交替连续的向井内注入，保证了井内粒子注入的连续性，同时避免第一输送缸和第二输送缸内粒子沉积堵塞，有效提高粒子冲击钻井的工作效率；在整个装置中仅第一输送缸、第二输送缸、换向管为高压状态，大大降低了高压区，提高了安全性；作为一个完整的技术方案，该方法能够保证钻井过程中粒子注入的连续性极大的提高了粒子冲击钻井效率。
实施例2
参见图1和图2，一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，a、所述粒子添注步 骤是指将粒子添注到粒子混合料斗4内；b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。
所述粒子注入步骤中的粒子注入速度为0.5kg/s。
所述粒子注入步骤中的粒子注入压力为5MPa。
所述粒子添注步骤是指通过螺杆输送机1将粒子添注到通过高压管线2与钻台3连接的粒子混合料斗4内；所述粒子混合步骤是指通过渣浆泵5向粒子混合料斗4内泵送泥浆，将泥浆和粒子充分混合；所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，所述双注入泵连续注入装置包括第一液压缸6、第二液压缸7、摆动液压缸8、换向管9、第一活塞10、第一输送缸11、第二活塞12和第二输送缸13，启动第一液压缸6、第二液压缸7和摆动液压缸8，第一活塞10进入添注冲程，摆动液压缸8将换向管9摆动到第二输送缸13处并连通，粒子、泥浆混合物进入第一输送缸11内；同时第二活塞12进入压缩冲程，将第二输送缸13内的粒子、泥浆混合物通过换向管9注入高压管线2进入井内循环，第一活塞10添注冲程结束后进入压缩冲程，第二活塞12进入添注冲程，交替运行连续注入。
所述摆动液压缸8包括缸体14、活塞15、活塞杆16、摆杆17和连接在摆杆17上的花键18，活塞15通过活塞杆16与摆杆17连接，换向管9连接在花键18上。
本实施例为一较佳实施方式，摆动液压缸包括缸体、活塞、活塞杆、摆杆和连接在摆杆上的花键，活塞通过活塞杆与摆杆连接，换向管连接在花键上，采用此种特定结构的摆动液压缸，摆杆使换向管灵活的换向，不仅具有换向灵活的特点，而且采用花键、摆杆的这种结构延长了使用寿命。
实施例3
参见图2和图3，一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，a、所述粒子添注步骤是指将粒子添注到粒子混合料斗4内；b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。
所述粒子注入步骤中的粒子注入速度为2kg/s。
所述粒子注入步骤中的粒子注入压力为20MPa。
所述粒子添注步骤是指通过螺杆输送机1将粒子添注到通过高压管线2与钻台3连接的粒子混合料斗4内；所述粒子混合步骤是指通过渣浆泵5向粒子混合料斗4内泵送泥浆，将泥浆和粒子充分混合；所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，所 述双注入泵连续注入装置包括第一液压缸6、第二液压缸7、摆动液压缸8、换向管9、第一活塞10、第一输送缸11、第二活塞12和第二输送缸13，启动第一液压缸6、第二液压缸7和摆动液压缸8，第一活塞10进入添注冲程，摆动液压缸8将换向管9摆动到第二输送缸13处并连通，粒子、泥浆混合物进入第一输送缸11内；同时第二活塞12进入压缩冲程，将第二输送缸13内的粒子、泥浆混合物通过换向管9注入高压管线2进入井内循环，第一活塞10添注冲程结束后进入压缩冲程，第二活塞12进入添注冲程，交替运行连续注入。
所述摆动液压缸8包括缸体14、活塞15、活塞杆16、摆杆17和连接在摆杆17上的花键18，活塞15通过活塞杆16与摆杆17连接，换向管9连接在花键18上。
所述粒子混合料斗4内设置有螺旋式搅拌器19，螺旋式搅拌器19由螺旋搅拌棒20和驱动螺旋搅拌棒20转动的搅拌电机21构成，螺旋搅拌棒20位于粒子混合料斗4内，搅拌电机21位于粒子混合料斗4外。
本实施例为又一较佳实施方式，粒子混合料斗内设置有螺旋式搅拌器，螺旋式搅拌器由螺旋搅拌棒和驱动螺旋搅拌棒转动的搅拌电机构成，螺旋搅拌棒位于粒子混合料斗内，搅拌电机位于粒子混合料斗外，采用独特的螺旋式搅拌器搅拌时，能够在粒子混合料斗内形成漩涡，粒子和泥浆在离心力作用下具备初速度，能够快速均匀的混合在一起，从而利于粒子顺畅的进入井内，有效防止粒子在高压管线内沉积堵塞。
实施例4
参见图2和图5，一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，a、所述粒子添注步骤是指将粒子添注到粒子混合料斗4内；b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。
所述粒子注入步骤中的粒子注入速度为6kg/s。
所述粒子注入步骤中的粒子注入压力为30MPa。
所述粒子添注步骤是指通过螺杆输送机1将粒子添注到通过高压管线2与钻台3连接的粒子混合料斗4内；所述粒子混合步骤是指通过渣浆泵5向粒子混合料斗4内泵送泥浆，将泥浆和粒子充分混合；所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，所述双注入泵连续注入装置包括第一液压缸6、第二液压缸7、摆动液压缸8、换向管9、第一活塞10、第一输送缸11、第二活塞12和第二输送缸13，启动第一液压缸6、第二液压缸7和摆动液压缸8，第一活塞10进入添注冲程，摆动液压缸8将换向管9摆动到第二输送缸13处并连通，粒子、泥 浆混合物进入第一输送缸11内；同时第二活塞12进入压缩冲程，将第二输送缸13内的粒子、泥浆混合物通过换向管9注入高压管线2进入井内循环，第一活塞10添注冲程结束后进入压缩冲程，第二活塞12进入添注冲程，交替运行连续注入。
所述摆动液压缸8包括缸体14、活塞15、活塞杆16、摆杆17和连接在摆杆17上的花键18，活塞15通过活塞杆16与摆杆17连接，换向管9连接在花键18上。
所述粒子混合料斗4内设置有螺旋式搅拌器19，螺旋式搅拌器19由螺旋搅拌棒20和驱动螺旋搅拌棒20转动的搅拌电机21构成，螺旋搅拌棒20位于粒子混合料斗4内，搅拌电机21位于粒子混合料斗4外。
进一步的，所述高压管线2上连接有箭型止回阀22。
本实施例为又一较佳实施方式，高压管线上连接有箭型止回阀，采用箭型止回阀一方面能够使粒子、泥浆混合物顺畅的经高压管线进入井内，另一方面能够防止粒子、泥浆混合物逆窜入第一输送缸或第二输送缸内，有效避免粒子注入过程中泥浆泄漏伤人，进一步提高安全性。
实施例5
参见图2、图4和图5，一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，a、所述粒子添注步骤是指将粒子添注到粒子混合料斗4内；b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。
所述粒子注入步骤中的粒子注入速度为8kg/s。
所述粒子注入步骤中的粒子注入压力为40MPa。
所述粒子添注步骤是指通过螺杆输送机1将粒子添注到通过高压管线2与钻台3连接的粒子混合料斗4内；所述粒子混合步骤是指通过渣浆泵5向粒子混合料斗4内泵送泥浆，将泥浆和粒子充分混合；所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，所述双注入泵连续注入装置包括第一液压缸6、第二液压缸7、摆动液压缸8、换向管9、第一活塞10、第一输送缸11、第二活塞12和第二输送缸13，启动第一液压缸6、第二液压缸7和摆动液压缸8，第一活塞10进入添注冲程，摆动液压缸8将换向管9摆动到第二输送缸13处并连通，粒子、泥浆混合物进入第一输送缸11内；同时第二活塞12进入压缩冲程，将第二输送缸13内的粒子、泥浆混合物通过换向管9注入高压管线2进入井内循环，第一活塞10添注冲程结束后进入压缩冲程，第二活塞12进入添注冲程，交替运行连续注入。
所述摆动液压缸8包括缸体14、活塞15、活塞杆16、摆杆17和连接 在摆杆17上的花键18，活塞15通过活塞杆16与摆杆17连接，换向管9连接在花键18上。
所述粒子混合料斗4内设置有螺旋式搅拌器19，螺旋式搅拌器19由螺旋搅拌棒20和驱动螺旋搅拌棒20转动的搅拌电机21构成，螺旋搅拌棒20位于粒子混合料斗4内，搅拌电机21位于粒子混合料斗4外。
所述高压管线2上连接有箭型止回阀22。
进一步的，第一液压缸6和第二液压缸7均为双杆液压缸。换向管9内连接有两个密封圈23，两个密封圈23分别位于换向管9的两端。
本实施例为又一较佳实施方式，第一液压缸和第二液压缸均为双杆液压缸，能够实现等速往复运动，便于实现添注冲程和压缩冲程的同步性，增强粒子连续注入井内的稳定性，从而保证粒子钻井工作效率。换向管内连接有两个密封圈，两个密封圈分别位于换向管的两端，当换向管与第一输送缸或第二输送缸接通时，密封圈能够防止第一输送缸或第二输送缸内压力的泄漏，使添注冲程和压缩冲程都能够稳定的进行，保证粒子顺利的注入井内。
实施例6
参见图2、图4和图5，一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，a、所述粒子添注步骤是指将粒子添注到粒子混合料斗4内；b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。
所述粒子注入步骤中的粒子注入速度为10kg/s。
所述粒子注入步骤中的粒子注入压力为55MPa。
所述粒子添注步骤是指通过螺杆输送机1将粒子添注到通过高压管线2与钻台3连接的粒子混合料斗4内；所述粒子混合步骤是指通过渣浆泵5向粒子混合料斗4内泵送泥浆，将泥浆和粒子充分混合；所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，所述双注入泵连续注入装置包括第一液压缸6、第二液压缸7、摆动液压缸8、换向管9、第一活塞10、第一输送缸11、第二活塞12和第二输送缸13，启动第一液压缸6、第二液压缸7和摆动液压缸8，第一活塞10进入添注冲程，摆动液压缸8将换向管9摆动到第二输送缸13处并连通，粒子、泥浆混合物进入第一输送缸11内；同时第二活塞12进入压缩冲程，将第二输送缸13内的粒子、泥浆混合物通过换向管9注入高压管线2进入井内循环，第一活塞10添注冲程结束后进入压缩冲程，第二活塞12进入添注冲程，交替运行连续注入。
进一步的，螺旋搅拌棒20上设置有搅拌叶片24，搅拌叶片24与螺旋 搅拌棒20滑动连接。所述换向管9的横截面呈“S”型。
本实施例为最佳实施方式，在粒子冲击钻井过程中，采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内，启动第一液压缸、第二液压缸和摆动液压缸，第一活塞进入添注冲程，摆动液压缸将换向管摆动到第二输送缸处并连通，粒子、泥浆混合物进入第一输送缸内；同时第二活塞进入压缩冲程，将第二输送缸内的粒子、泥浆混合物通过换向管注入高压管线进入井内循环，第一活塞添注冲程结束后进入压缩冲程，第二活塞进入添注冲程，交替运行连续注入。第一输送缸、第二输送缸通过第一液压缸和第二液压缸以及摆动液压缸的配合，能够实现添注和压缩冲程的交替有序进行，第一输送缸、第二输送缸内的粒子、泥浆混合物能够交替连续的向井内注入，保证了井内粒子注入的连续性，同时避免第一输送缸和第二输送缸内粒子沉积堵塞，有效提高粒子冲击钻井的工作效率；在整个装置中仅第一输送缸、第二输送缸、换向管为高压状态，大大降低了高压区，提高了安全性；作为一个完整的技术方案，该方法能够保证钻井过程中粒子注入的连续性极大的提高了粒子冲击钻井效率。螺旋搅拌棒上设置有搅拌叶片，搅拌叶片与螺旋搅拌棒滑动连接，通过设置搅拌叶片能够增大搅拌力度，缩短搅拌时间，使粒子和泥浆能够迅速混合均匀，而搅拌叶片与螺旋搅拌棒滑动连接，可以根据需要灵活的调节搅拌叶片在粒子混合料斗内的高度，以使粒子和泥浆能够混合的更加均匀，进一步防止粒子在高压管线内沉积堵塞。换向管的横截面呈“S”型，采用特定的“S”型换向管，使换向过程更加灵活方便，换向管无论是与第一输送缸连接，还是与第二输送缸连接，均能快速的连通，以保证粒子注入的连续性。

Claims (6)

  1. 一种适用于粒子钻井的双注入泵连续注入方法，依次包括粒子添注步骤、粒子混合步骤和粒子注入步骤，其特征在于：
    a、所述粒子添注步骤是指将粒子添注到粒子混合料斗内；
    b、所述粒子混合步骤是指向粒子混合料斗内泵送泥浆，将泥浆和粒子充分混合；
    c、所述粒子注入步骤是指采用双注入泵连续注入装置将泥浆和粒子混合物连续注入井内。
  2. 根据权利要求1所述的一种适用于粒子钻井的双注入泵连续注入方法，其特征在于：所述粒子注入步骤中的粒子注入速度为0.5-10kg/s。
  3. 根据权利要求1所述的一种适用于粒子钻井的双注入泵连续注入方法，其特征在于：所述粒子注入步骤中的粒子注入压力为5-55MPa。
  4. 根据权利要求1所述的一种适用于粒子钻井的双注入泵连续注入方法，其特征在于：所述双注入泵连续注入装置，包括通过高压管线与钻井立管连接的粒子混合料斗，粒子混合料斗内设置有换向管，换向管上连接有驱动换向管左右摆动的摆动液压缸，粒子混合料斗上连接有第一输送缸和第二输送缸，粒子注入时，首先启动第一液压缸、第二液压缸和摆动液压缸，第一液压缸进入添注冲程，摆动液压缸将换向管摆动到第二输送缸处并连通，粒子和泥浆进入第一输送缸内；同时第二液压缸进入压缩冲程，将第二输送缸内的粒子和泥浆通过换向管注入高压管线进入井内循环，第一液压缸添注冲程结束后进入压缩冲程，第二液压缸进入添注冲程，交替运行连续注入。
  5. 根据权利要求4所述的一种适用于粒子钻井的双注入泵连续注入方法，其特征在于：所述摆动液压缸包括缸体、活塞、活塞杆、摆杆和连接在摆杆上的花键，活塞通过活塞杆与摆杆连接，换向管连接在花键上。
  6. 根据权利要求1或5所述的一种适用于粒子钻井的双注入泵连续注入方法，其特征在于：所述粒子混合料斗内设置有螺旋式搅拌器，螺旋式搅拌器由螺旋搅拌棒和驱动螺旋搅拌棒转动的搅拌电机构成，螺旋搅拌棒位于粒子混合料斗内，搅拌电机位于粒子混合料斗外。
PCT/CN2016/089441 2015-07-09 2016-07-08 一种适用于粒子钻井的双注入泵连续注入方法 WO2017005216A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510399292.5A CN105041214A (zh) 2015-07-09 2015-07-09 一种适用于粒子钻井的双注入泵连续注入方法
CN201510399292.5 2015-07-09

Publications (1)

Publication Number Publication Date
WO2017005216A1 true WO2017005216A1 (zh) 2017-01-12

Family

ID=54448138

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/089441 WO2017005216A1 (zh) 2015-07-09 2016-07-08 一种适用于粒子钻井的双注入泵连续注入方法

Country Status (2)

Country Link
CN (1) CN105041214A (zh)
WO (1) WO2017005216A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105041214A (zh) * 2015-07-09 2015-11-11 四川川庆石油钻采科技有限公司 一种适用于粒子钻井的双注入泵连续注入方法
CN106968600B (zh) * 2017-04-26 2019-08-30 中国石油大学(华东) 粒子射流与钻头联合钻穿套管和岩石的综合实验装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968845A (en) * 1973-01-15 1976-07-13 Chaffin John D Apparatus and method for geological drilling and coring
US4304609A (en) * 1980-02-28 1981-12-08 Morris James B N Drill cuttings treatment apparatus and method
WO2009099945A2 (en) * 2008-02-01 2009-08-13 Particle Drilling Technologies, Inc. Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring, perforating, assisting annular flow, and associated methods
CN102022078A (zh) * 2009-09-11 2011-04-20 中国石化集团胜利石油管理局钻井工艺研究院 粒子冲击钻井方法及装置
CN202157747U (zh) * 2011-06-23 2012-03-07 中国石油天然气集团公司 直接泵钢颗粒浆的颗粒冲击钻井装置
CN104963631A (zh) * 2015-07-09 2015-10-07 四川川庆石油钻采科技有限公司 一种适用于粒子钻井的双注入泵连续注入装置
CN105041214A (zh) * 2015-07-09 2015-11-11 四川川庆石油钻采科技有限公司 一种适用于粒子钻井的双注入泵连续注入方法
CN204782762U (zh) * 2015-07-09 2015-11-18 四川川庆石油钻采科技有限公司 一种适用于粒子钻井的双注入泵连续注入装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204312315U (zh) * 2014-12-12 2015-05-06 中联重科股份有限公司 泵送设备的分配阀、泵送设备及泵送控制***
CN104712546A (zh) * 2015-03-18 2015-06-17 烟台赛地重工有限公司 新型恒压换向s管阀

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968845A (en) * 1973-01-15 1976-07-13 Chaffin John D Apparatus and method for geological drilling and coring
US4304609A (en) * 1980-02-28 1981-12-08 Morris James B N Drill cuttings treatment apparatus and method
WO2009099945A2 (en) * 2008-02-01 2009-08-13 Particle Drilling Technologies, Inc. Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring, perforating, assisting annular flow, and associated methods
CN102022078A (zh) * 2009-09-11 2011-04-20 中国石化集团胜利石油管理局钻井工艺研究院 粒子冲击钻井方法及装置
CN202157747U (zh) * 2011-06-23 2012-03-07 中国石油天然气集团公司 直接泵钢颗粒浆的颗粒冲击钻井装置
CN104963631A (zh) * 2015-07-09 2015-10-07 四川川庆石油钻采科技有限公司 一种适用于粒子钻井的双注入泵连续注入装置
CN105041214A (zh) * 2015-07-09 2015-11-11 四川川庆石油钻采科技有限公司 一种适用于粒子钻井的双注入泵连续注入方法
CN204782762U (zh) * 2015-07-09 2015-11-18 四川川庆石油钻采科技有限公司 一种适用于粒子钻井的双注入泵连续注入装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XU, YIJI ET AL.: "Design of the Injection System for Double Plunger Particle Impact Drilling", CHINA PETROLEUM MACHINERY, vol. 41, no. 3, 31 March 2013 (2013-03-31), ISSN: 1001-4578 *

Also Published As

Publication number Publication date
CN105041214A (zh) 2015-11-11

Similar Documents

Publication Publication Date Title
CN101749032B (zh) 新型煤矿井下湿喷机
CN100494582C (zh) 高压喷射搅拌法水泥土桩成桩装置及其施工方法
CN105715211B (zh) 钢粒射流冲击破岩综合实验装置
CN102862232B (zh) 移动湿式喷浆搅拌站
CN102022078A (zh) 粒子冲击钻井方法及装置
CN103061787B (zh) 矿用混凝土湿式喷射装备
CN1686914A (zh) 一种隧道或隧洞衬砌背后回填细石混凝土及其回填方法
CN201610755U (zh) 一种新型煤矿井下湿喷机
WO2017005216A1 (zh) 一种适用于粒子钻井的双注入泵连续注入方法
CN203145957U (zh) 矿用混凝土湿式喷射装备
CN104975809B (zh) 一种适用于钻井的环保粒子循环***
WO2017005217A1 (zh) 一种粒子钻井方法
CN204782761U (zh) 一种适用于钻井的环保粒子循环***
CN202764031U (zh) 移动湿式喷浆搅拌站
CN204782762U (zh) 一种适用于粒子钻井的双注入泵连续注入装置
CN104963631A (zh) 一种适用于粒子钻井的双注入泵连续注入装置
CN201520008U (zh) 高效复合式搅拌机
CN201148949Y (zh) 井下用搅拌混凝土泵
CN110952927A (zh) 双管式高压磨料喷射水平钻孔装置
CN216968226U (zh) 一种制备流态可固化土的成套设备
CN206554079U (zh) 一种竖向水泥搅拌桩成型设备
CN109594557A (zh) 一种超高压旋喷桩机及旋喷桩施工方法
CN202215258U (zh) 矿用砼多功能喷射机
CN209453887U (zh) 一种改进的砂浆灌注装置
CN108058273A (zh) 移动式井下混凝土上料搅拌输送成套设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16820867

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16820867

Country of ref document: EP

Kind code of ref document: A1