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CN-121993180-A - Underground high-speed continuous wave pulser generating device and application method thereof

CN121993180ACN 121993180 ACN121993180 ACN 121993180ACN-121993180-A

Abstract

The invention relates to a downhole high-speed continuous wave pulser generating device and a using method thereof, wherein the device comprises a controller, an outer cylinder and an inner cylinder, and a plurality of pulse generating cylinders are arranged on the outer cylinder; the inner cylinder is internally penetrated with a tuning rotating shaft, a first end of the tuning rotating shaft is connected with a tuning block, the tuning block can rotate and adjust the intensity and frequency of pulses and can clean the top end of each pulse generating cylinder, a second end of the tuning rotating shaft is connected with an axial flow impeller, a plurality of first permanent magnets are arranged on the axial flow impeller, a driving coil is arranged on the outer wall of the inner cylinder, pulse coils are arranged on the inner wall of each pulse generating cylinder, a piston cylinder is arranged on the inner side of each pulse coil, a pulse piston is arranged in each piston cylinder, a second permanent magnet is fixedly arranged in each pulse piston, an air storage cylinder capable of automatically adjusting air pressure is arranged in each pulse generating cylinder, and the driving coil and each pulse coil are electrically connected with a controller. The invention simplifies the structural design, improves the energy utilization rate, and ensures that stable continuous wave pulse signals can be generated under extreme conditions.

Inventors

  • PANG DONGXIAO
  • WANG LEI
  • ZHOU CHANGHONG
  • CAI WENBO
  • XU JIANCHAO
  • Kang Guiqiong
  • LI LEI
  • LU QI
  • HUANG CHONGJUN
  • LI WEICHENG

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团川庆钻探工程有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (12)

  1. 1. A downhole high-speed continuous wave pulser generating device is characterized by comprising a controller and an outer cylinder (1), wherein an outer cylinder center hole penetrating along the axial direction is arranged at the center of the outer cylinder (1), an inner cylinder (3) is sleeved in the outer cylinder center hole, an inner cylinder center hole penetrating along the axial direction is arranged at the center of the inner cylinder (3), a drilling fluid channel is formed by the inner cylinder center hole, a plurality of pulse generating cylinders (2) are arranged on the outer side of the inner cylinder (3) on the outer cylinder (1) along the circumferential direction at intervals, a tuning rotating shaft (5) is rotatably arranged in the inner cylinder center hole in a penetrating manner, a first end of the tuning rotating shaft (5) penetrates out of the inner cylinder (3) and is fixedly connected with a fan-shaped tuning block (6), the tuning block (6) can rotatably adjust the intensity and frequency of pulses in the pulse generating cylinders (2), the tuning block (6) can clean the top ends of the pulse generating cylinders (2), an axial flow impeller (7) arranged in the inner cylinder (3) at the second end of the outer side of the outer cylinder (1), an axial flow impeller (7) is fixedly connected with an axial flow coil (7) arranged at the inner cylinder (3), the axial flow coil (7) is provided with a plurality of permanent magnet (8) corresponding to the top ends of the pulse generating coils (2), the pulse coil is characterized in that a piston cylinder (10) is arranged on the inner side of the pulse coil (9), a pulse piston (11) is arranged in the piston cylinder (10) in a sealing sliding manner, a second permanent magnet (15) is fixedly arranged in the pulse piston (11), an air storage cylinder (12) capable of automatically adjusting air pressure is arranged below the piston cylinder (10) in the pulse generating cylinder (2), the top end of the air storage cylinder (12) is communicated with the bottom end of the piston cylinder (10), the bottom end of the air storage cylinder (12) is arranged in an openable and closable manner, and the driving coil (8) and the pulse coil (9) are electrically connected with the controller.
  2. 2. A downhole high-speed continuous wave pulser generation device according to claim 1, wherein the outer cylinder (1), the pulse generation cylinder (2), the inner cylinder (3), the piston cylinder (10) and the pulse piston (11) are all made of non-magnetic materials.
  3. 3. The underground high-speed continuous wave pulser generating device according to claim 2, wherein a sheath (13) is fixedly connected to the top end of the outer barrel (1), a sheath center hole is formed in the center of the sheath (13) in a penetrating manner, the top end of the inner barrel (3) is sleeved in the sheath center hole, a plurality of sheath channel holes for drilling fluid circulation are formed in positions, corresponding to the pulse generating barrels (2), of the sheath (13), the first end of the tuning rotating shaft (5) is located in the sheath (13) and the tuning block (6) rotates in the sheath (13), the bottom end of the tuning block (6) is in contact with the top end of the pulse generating barrels (2), the tuning block (6) can rotate to completely cover the top end of the pulse generating barrels (2), the top end of the sheath (13) can be fixedly connected with a drill rod, and the bottom end of the outer barrel (1) can be fixedly connected with the drill rod.
  4. 4. The underground high-speed continuous wave pulser generating device according to claim 3, wherein the sheath (13) comprises a sheath top plate and a sheath bottom plate which are spaced in parallel up and down, the sheath top plate and the sheath bottom plate are connected through a circumference vertical plate, a sheath accommodating space is formed between the sheath top plate and the sheath bottom plate, the tuning block (6) is positioned in the sheath accommodating space, the sheath through holes are oppositely arranged on the sheath top plate and the sheath bottom plate, and the top ends of the pulse generating cylinders (2) are respectively sleeved in the sheath through holes of the sheath bottom plate.
  5. 5. The underground high-speed continuous wave pulser generating device according to claim 2, wherein a plurality of first sealing rings (141) are clamped on the outer wall of the pulse piston (11), the plurality of first sealing rings (141) are arranged at intervals along the axial direction of the pulse piston (11), the second permanent magnet (15) is fixedly connected to the center of the pulse piston (11) along the axial direction of the pulse piston, the second permanent magnet (15) is in a cylindrical arrangement, and magnetic poles at two ends of the second permanent magnet (15) are respectively arranged close to the top end and the bottom end of the pulse piston (11).
  6. 6. The underground high-speed continuous wave pulser generating device according to claim 3, wherein a baffle plate (17) is fixedly connected to the top end of the pulser cylinder (2), a pulser cylinder drilling fluid through hole which is correspondingly communicated with the sheath through hole is formed in the baffle plate (17), a first spring (161) is arranged between the top end of the pulser piston (11) and the baffle plate (17), and a second spring (162) is arranged between the bottom end of the pulser piston (11) and the top end of the air storage cylinder (12).
  7. 7. The underground high-speed continuous wave pulser generating device according to claim 2, wherein an electromagnetic valve electrically connected with the controller is fixedly connected to the bottom end of the air storage cylinder (12), the electromagnetic valve and the bottom end of the pulse generating cylinder (2) are arranged at intervals, an equalization piston (18) is slidably connected in the air storage cylinder (12), a second sealing ring (142) is clamped on the outer wall of the equalization piston (18), and high-pressure inert gas is pre-stored below the equalization piston (18) in the air storage cylinder (12).
  8. 8. The downhole high-speed continuous wave pulser according to claim 7, wherein the solenoid valve is a high-speed inching solenoid valve.
  9. 9. The underground high-speed continuous wave pulser generating device according to claim 7, wherein the bottom end of the pulse generating cylinder (2) is fixedly connected with an equalizing diaphragm (19), and the equalizing diaphragm (19) is made of an elastic material.
  10. 10. The downhole high-speed continuous wave pulser generation device according to claim 7, wherein pressure sensors are provided on the inner wall of said gas cylinder (12) near the top and bottom ends thereof, each of said pressure sensors being electrically connected to said controller.
  11. 11. The underground high-speed continuous wave pulser generating device according to claim 1, wherein a plurality of brackets (4) are fixedly connected in the central hole of the inner cylinder, the brackets (4) are arranged at intervals along the axial direction of the inner cylinder, each bracket (4) is in a hollowed-out arrangement, a rotating shaft hinge sleeve is arranged at the center of each bracket (4), and the tuning rotating shaft (5) is rotatably connected in each rotating shaft hinge sleeve.
  12. 12. A method of using a downhole high-speed continuous wave pulser generation apparatus as claimed in any one of claims 1-11, comprising the steps of: s1, fixedly installing the underground high-speed continuous wave pulser generating device in drilling equipment through a drill rod; s2, injecting drilling fluid into a well, enabling the drilling fluid to flow through the central hole of the inner cylinder to push the axial flow impeller (7) to rotate, and enabling the first permanent magnet on the axial flow impeller (7) to interact with the driving coil (8) to generate voltage so as to generate electric energy in the device; S3, under the pressure action of drilling fluid, the pulse piston (11) in the piston cylinder (10) moves towards the air storage cylinder (12), and air in the air storage cylinder (12) is compressed to finish energy storage; S4, electrifying the pulse coil (9) through the controller to generate an electromagnetic field to act on the second permanent magnet (15), pushing the pulse piston (11) to move in a direction away from the air storage cylinder (12), compressing drilling fluid in the piston cylinder (10) to be sprayed out through an opening at the top end of the pulse generation cylinder (2), and generating underground pulses; S5, simultaneously with S4, electrifying the driving coil (8) through the controller, controlling the tuning rotating shaft (5) and the tuning block (6) to rotate by utilizing the interaction of the driving coil (8) and the first permanent magnet on the axial flow impeller (7), adjusting the opening of the top end opening of the pulse generating cylinder (2), and generating a required pulse effect by matching with the electromagnetic thrust of the pulse coil (9); S6, monitoring the air pressure in the air storage cylinder (12), and when the air pressure in the air storage cylinder (12) is insufficient, controlling the bottom end of the air storage cylinder (12) to be opened by the controller so as to automatically supplement the air pressure in the air storage cylinder (12); And S7, under the extreme condition, the bottom end of the air cylinder (12) is controlled to be normally open by the controller, and the electromagnetic field of the pulse coil (9) is utilized to drive the second permanent magnet (15) and the pulse piston (11) to reciprocate so as to continuously realize the generation of underground pulses.

Description

Underground high-speed continuous wave pulser generating device and application method thereof Technical Field The invention relates to the technical field of drilling devices, in particular to a downhole high-speed continuous wave pulser generating device and a using method thereof. Background Existing downhole continuous wave pulser generation devices typically rely on mechanical or hydraulic drive systems to generate continuous wave signals, which to some extent can meet the requirements of downhole data transmission and signal control, but there are still some drawbacks in practical applications. The invention of China patent CN103696762B discloses a rotary-driven swing valve type continuous wave generator, the rotary motion of the device is converted into transverse reciprocating motion through a rotary-swing conversion mechanism, so that a pendulum and a stator swing relatively to generate continuous wave signals, although the invention has compact structure and reasonable design, the invention can reduce the blocking risk, but the reliability and stability of the device under high-pressure, high-temperature or complex mud environment are still limited, and in addition, an electric connection module and a pressure balance module of the device are easy to be influenced by the environment when working for a long time, so that the performance is reduced. The chinese patent CN106884649B discloses a continuous wave signal generating device, which uses the cooperation of the multi-port reciprocating main valve and the driving mechanism to generate continuous pressure pulses through the interception effect, so as to form a continuous wave signal, although the device can provide higher data transmission rate and stronger signal intensity, the complex multi-port structure may cause insufficient tightness and abrasion of the valve port in practical application, thereby affecting the long-term stability of the device. Although the above designs solve the problem of generating underground continuous wave signals to a certain extent, there are also limitations that firstly, their structures are relatively complex, and are easy to cause blockage or abrasion due to long-term use or complex working conditions, so that the service life and stability of the devices are affected, and secondly, under extremely high pressure or high temperature conditions, the reliability of the devices is poor, continuous and stable signal output is difficult to ensure, and furthermore, the existing devices usually rely on a single energy conversion mechanism, such as hydraulic or mechanical driving, so that the energy utilization rate is low, and the devices are difficult to adapt to more complex underground environments. Therefore, the inventor provides a downhole high-speed continuous wave pulser generating device and a using method thereof by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art. Disclosure of Invention The invention aims to provide a downhole high-speed continuous wave pulser generating device and a using method thereof, which solve the reliability problem of the existing device under high-pressure and high-temperature environments, simplify the structural design, improve the energy utilization rate and ensure that stable continuous wave pulse signals can still be generated under extreme conditions. The invention aims to achieve the purpose, and provides a downhole high-speed continuous wave pulser generating device which comprises a controller and an outer barrel, wherein an outer barrel central hole penetrating in the axial direction is formed in the center of the outer barrel, an inner barrel is sleeved in the outer barrel central hole, an inner barrel central hole penetrating in the axial direction is formed in the center of the inner barrel, a plurality of pulse generating cylinders are arranged on the outer side of the inner barrel at intervals in the circumferential direction on the outer barrel, a tuning rotating shaft is rotatably arranged in the inner barrel central hole in a penetrating manner, a fan-shaped tuning block is fixedly connected after a first end of the tuning rotating shaft penetrates out of the inner barrel, the tuning block can rotate and adjust the intensity and frequency of pulses in the pulse generating cylinders, the tuning block can clean the top end of each pulse generating cylinder, a plurality of first permanent magnets are fixedly connected to the second end of the tuning rotating shaft, driving coils are arranged at positions, corresponding to the inner side of the inner barrel impellers, the top end of each pulse generating cylinder is provided with a driving coil, the bottom end of each pulse generating cylinder is provided with a sealing piston, the piston is arranged in the piston is connected with the bottom end of each pulse generating cylinder, and the piston is provided with the piston. The underground high-sp