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CN-121382092-B - Self-excitation type all-metal drilling pulse generator

CN121382092BCN 121382092 BCN121382092 BCN 121382092BCN-121382092-B

Abstract

The invention relates to the technical field of oilfield coiled tubing operation and discloses a self-excited all-metal drilling pulse generator which mainly comprises a power system and an oscillation system, wherein the power system comprises an all-metal spiral stator and a rotor, the rotor is arranged in the all-metal spiral stator and rotates to form a spiral sealing cavity, the oscillation system comprises an oscillation block seat and an oscillation block which are connected to the bottom of the all-metal spiral stator in a threaded mode, the oscillation block seat and the oscillation block are installed in a heat mode, the oscillation block seat and the oscillation block are in interference fit, a fixed block is arranged at the bottom of the oscillation block, the top of the all-metal spiral stator is connected with a top joint, a rotor end stop is arranged in the top joint, static friction is converted into dynamic friction through reduction of friction resistance of a drilling tool, drilling speed is remarkably improved, stable control of a well track is ensured, and a temperature use range and a corrosion resistant range are effectively enlarged by adopting an all-metal stator and rotor power structure.

Inventors

  • LIU JIANG
  • GUO GANG
  • LIU YANGYANG

Assignees

  • 天津华信能源装备有限公司

Dates

Publication Date
20260508
Application Date
20251218

Claims (6)

  1. 1. The self-excitation all-metal drilling pulse generator is characterized by comprising a power system and an oscillation system; The power system comprises an all-metal helical stator (300) and a rotor (400); The rotor (400) is arranged in the all-metal spiral stator (300) to rotate and form a spiral sealing cavity with each other; the oscillating system comprises an oscillating block seat (500) and an oscillating block (600) which are connected to the bottom of the all-metal spiral stator (300) in a threaded manner; The swinging block seat (500) and the swinging block (600) are thermally installed, and the swinging block seat (500) and the swinging block (600) are in interference fit; The oscillating system further comprises a fixed block (700) arranged at the bottom of the oscillating block (600); the top of the all-metal spiral stator (300) is connected with a top joint (100), and a rotor end stop (200) is arranged in the top joint (100); the lower part of the all-metal spiral stator (300) is connected with a bottom joint (800); The power system is driven by liquid to generate mechanical kinetic energy to drive the oscillating system at the lower part to generate pulse pressure, so that axial vibration is generated; The swinging block (600) is in plane contact with the fixed block (700), and the diameter of the bottom of the swinging block (600) is smaller than that of the top of the fixed block (700); an adjusting component (900) capable of changing the size of the coaxial through hole is arranged in the swinging block (600), and an expansion groove is formed in the top of the swinging block (600) and communicated with the coaxial through hole outwards; The adjusting component (900) comprises a placing groove (901) arranged on the inner side of the coaxial through hole, and: an arcuate plate (902) rotatably connected to the top of the coaxial through hole; a driving part disposed between the arc plate (902) and the placement groove (901), the driving part changing a distance between bottoms of the arc plate (902); the driving part comprises a sliding rod (903) vertically fixed on the back of the arc-shaped plate (902), and: A slide (904) slidingly coupled to the slide bar (903); A rotating rod (905) connected between the sliding seat (904) and the middle part of the placing groove (901), wherein the initial state of the rotating rod (905) is inclined to the sliding seat (904); A moving ring (906) sleeved on the back of the arc-shaped plate (902), wherein the moving ring (906) is positioned inside the placing groove (901); And the telescopic piece (908) is connected between the placing groove (901) and the movable ring (906), and the telescopic piece (908) controls the movable ring (906) to move up and down to press the rotating rod (905) to rotate.
  2. 2. The self-excited all-metal drilling pulse generator of claim 1, wherein a coaxial through hole is formed in the middle of the swinging block (600), and an eccentric through hole is formed in the fixed block (700).
  3. 3. A self-excited all-metal drilling pulse generator as set forth in claim 2, wherein said coaxial through holes are in staggered communication with the eccentric through holes.
  4. 4. The self-excited all-metal drilling pulse generator of claim 1, wherein an abutment block (907) is vertically fixed at the bottom of the movable ring (906) corresponding to the position of the rotating rod (905), and a roller is rotatably connected to the bottom of the abutment block (907).
  5. 5. The self-excited all-metal drilling pulse generator of claim 1, wherein limiting columns are fixed at the top end and the bottom end of the sliding rod (903), and shock pads for protection are vertically arranged on the limiting columns.
  6. 6. A self-exciting all-metal drilling pulse generator according to claim 1, wherein the bottom of said arcuate plate (902) is triangular.

Description

Self-excitation type all-metal drilling pulse generator Technical Field The invention relates to the technical field of oilfield coiled tubing operation, in particular to a self-excitation all-metal drilling pulse generator. Background The continuous oil pipe can execute the complex drilling tasks of slim hole drilling, directional well track control, sidetrack horizontal well drilling and the like, and is suitable for well completion operations such as well flushing, acidizing and unblocking, cementing plug, bridge plug descending and the like. The flexibility and the tightness of the well casing can effectively control the pressure of the well casing in underbalanced drilling, and reduce stratum damage. At present, in the drilling engineering of petroleum, natural gas and geothermal heat, directional wells and horizontal wells are more and more, in directional drilling, the pressure supporting condition often occurs, and the drilling period is seriously influenced due to the directional pressure supporting. And simultaneously due to the influence of the ground corrosion medium and the temperature. The service life and stability of a rubber or equal-wall-thickness rubber motor adopted by the power part of the traditional drilling pulse generator are greatly limited, so that we propose a self-excited all-metal drilling pulse generator which solves the defect of the prior art. Disclosure of Invention In order to achieve the aim, the invention provides the following technical scheme that the self-excitation all-metal drilling pulse generator consists of a power system and an oscillation system; the power system comprises an all-metal spiral stator and a rotor; The rotors are arranged in the all-metal spiral stator to rotate and form a spiral sealing cavity between the rotors; the oscillating system comprises an oscillating block seat and an oscillating block which are connected to the bottom of the all-metal spiral stator in a threaded manner; the swinging block seat and the swinging block are in thermal installation, and the swinging block seat and the swinging block are in interference fit; the oscillating system also comprises a fixed block arranged at the bottom of the oscillating block; The top of the all-metal spiral stator is connected with a top connector, and a rotor end stop is arranged in the top connector; The lower part of the all-metal spiral stator is connected with a bottom joint; The power system is driven by liquid to generate mechanical kinetic energy to drive the lower oscillating system to generate pulse pressure, so that axial vibration is generated. Further, the swinging block is in plane contact with the fixed block, and the bottom diameter of the swinging block is smaller than the top diameter of the fixed block. Further, a coaxial through hole is formed in the middle of the swinging block, and an eccentric through hole is formed in the fixed block. Further, the coaxial through holes are communicated with the eccentric through holes in a staggered manner. Further, an adjusting component capable of changing the size of the coaxial through hole is arranged in the swinging block, and an expansion groove is formed in the top of the swinging block, communicated with the coaxial through hole and outwards. Further, the adjusting component comprises a placing groove arranged on the inner side of the coaxial through hole, and: An arc-shaped plate rotatably connected to the top of the coaxial through hole; and the driving part is arranged between the arc-shaped plate and the placing groove and changes the distance between the bottoms of the arc-shaped plates. Further, the driving part comprises a sliding rod vertically fixed at the back of the arc-shaped plate, and: A slide seat connected to the slide rod in a sliding manner; The rotating rod is connected between the sliding seat and the middle part of the placing groove, and the initial state of the rotating rod is inclined to the sliding seat; the movable ring is sleeved on the back of the arc-shaped plate and is positioned in the placing groove; The telescopic piece is connected between the placing groove and the movable ring and controls the movable ring to move up and down to press the rotating rod to rotate. Further, a supporting block is vertically fixed at the bottom of the movable ring corresponding to the position of the rotating rod, and a roller is rotatably connected to the bottom of the supporting block. Further, limiting columns are fixed at the top end and the bottom end of the sliding rod, and shock pads for protection are vertically arranged on the limiting columns. Furthermore, the bottom of the arc-shaped plate is triangular. Compared with the prior art, the invention provides a self-excitation all-metal drilling pulse generator, which has the following beneficial effects: 1. The oscillating part generates pressure fluctuation through the periodical opening and closing of the oscillating block and the fixed block to form upw