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WO2017005216A1 - Procédé d'injection continue de pompe à double injection approprié pour un forage à impact de particules - Google Patents

Procédé d'injection continue de pompe à double injection approprié pour un forage à impact de particules Download PDF

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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
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WIPO (PCT)
Prior art keywords
particle
injection
particles
hydraulic cylinder
cylinder
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Application number
PCT/CN2016/089441
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English (en)
Chinese (zh)
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
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Publication of WO2017005216A1 publication Critical patent/WO2017005216A1/fr

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    • 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.

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  • 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

La présente invention se rapporte au domaine technique des équipements de forage de pétrole et de gaz. L'invention concerne un procédé d'injection continue de pompe à double injection approprié pour un forage à impact de particules. Le procédé comprend les étapes suivantes en séquence : a. une étape d'addition de particules consistant à ajouter des particules dans une trémie (4) de mélange de particules ; b. une étape de mélange de particules consistant à pomper une suspension dans la trémie (4) de mélange de particules, à mélanger soigneusement la suspension avec les particules ; et c. une étape d'injection de particules consistant à injecter en continu le mélange de la suspension et des particules dans un puits au moyen d'un appareil d'injection à pompe à double injection continue. Dans la présente invention, l'appareil d'injection à pompe à double injection continue est adopté dans l'étape d'injection de particules, de sorte que les courses d'addition et de compression soient réalisées de manière alternée de façon ordonnée, ce qui permet d'assurer la continuité d'injection des particules dans le puits, et d'améliorer efficacement l'efficacité du forage à impact de particules.
PCT/CN2016/089441 2015-07-09 2016-07-08 Procédé d'injection continue de pompe à double injection approprié pour un forage à impact de particules WO2017005216A1 (fr)

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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

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