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CN-121993111-A - Positioning tool with double magnets for oilfield operation

CN121993111ACN 121993111 ACN121993111 ACN 121993111ACN-121993111-A

Abstract

The invention relates to the technical field of downhole testing instruments for petroleum drilling, in particular to a positioning tool with double magnets for oilfield operation. This take locating tool for oil field operation of double magnet, including pulse short circuit, well accuse short circuit, electricity generation short circuit, flexible short circuit and the locating tool who cruises the short circuit and constitute from top to bottom connects gradually, there are a plurality of magnetism short circuits in the locating tool, be equipped with a plurality of mounting groove on every magnetism short circuit and install the magnet in the mounting groove, the mounting groove is sealed with the apron, well accuse short circuit is equipped with the through-hole through wires in the lateral wall to cruising the short circuit, the wire passes through the through wires hole and passes through between each short circuit transmission signal and electric power. The positioning tool with double magnets for oilfield operation improves the size of the magnets and the strength of magnetic field signals by installing a plurality of magnetic short circuits on the positioning tool, shortens the distance between the magnetic short circuits and the guide heads, can determine the accurate position and direction of the tool, and further improves the measuring precision of the tool.

Inventors

  • LI RUNQI
  • WAN ZHENG
  • QI YUE
  • ZHANG ZHENHUA
  • ZHAO HANQING
  • XU YUEQING
  • YANG ZHIJIAN
  • WANG CHUNHUA
  • WANG HAIMIAO
  • WANG JUNJIE

Assignees

  • 大庆钻探工程有限公司
  • 中国石油天然气集团有限公司

Dates

Publication Date
20260508
Application Date
20241031

Claims (11)

  1. 1. A positioning tool for oilfield operations with dual magnets, comprising: The electric power control device comprises a pulse short circuit (3), a middle control short circuit (4), a power generation short circuit (5), a flexible short circuit (7) and a positioning tool consisting of cruising short circuits (8) which are sequentially connected end to end, wherein a plurality of magnetic short circuits are arranged in the positioning tool, each magnetic short circuit comprises an upper magnetic short circuit (2) and a lower magnetic short circuit (6), the bottom end of the upper magnetic short circuit (2) is connected with the top end of the pulse short circuit (3), the lower magnetic short circuit (6) is arranged between the power generation short circuit (5) and the flexible short circuit (7), a plurality of mounting grooves are uniformly formed in the outer wall of the lower magnetic short circuit (6), a magnet (607) is arranged in each mounting groove, a cover plate (602) is arranged at the top end of each mounting groove, a vertically through threading hole is formed in the side wall of the middle control short circuit (4) to the cruising short circuit (8), and a wire is arranged in the threading hole to connect the pulse short circuit (3), the middle control short circuit (4), the power generation short circuit (5) and the cruising short circuit (8) with power signals.
  2. 2. The positioning tool for oilfield operation with double magnets according to claim 1, wherein the magnetic short circuit comprises a magnet framework (601), the mounting groove is positioned on the outer wall of the magnet framework (601), and a sealing ring (605) is arranged between the magnet framework (601) and the cover plate (602).
  3. 3. The positioning tool for oilfield operation with double magnets according to claim 2, wherein a plurality of fixing bolts (606) are arranged in each mounting groove and connected with the cover plate (602).
  4. 4. The positioning tool for oilfield operation with double magnets according to claim 1, wherein the top end of the upper magnetic short circuit (2) is provided with a protection joint (1).
  5. 5. The positioning tool for oilfield operations with dual magnets of claim 1, wherein the number of the magnetic shorting mounting slots is four.
  6. 6. The positioning tool for oilfield operation with double magnets according to claim 1, wherein the cruising short (8) comprises an upper cruising drive shaft (801) and a lower cruising drive shaft (804), the top end of the lower cruising drive shaft (804) being connected to the bottom end of the upper cruising drive shaft (801).
  7. 7. The positioning tool for oil field operation with double magnets according to claim 6, wherein an upper electronic bin module (803) is arranged in the upper cruising driving shaft (801), a lower electronic bin module (807) is arranged outside the upper cruising driving shaft (801), and a control circuit board and a central control short circuit (4) are arranged in the upper electronic bin module (803) and the lower electronic bin module (807) for signal transmission.
  8. 8. The positioning tool for oilfield operations with dual magnets of claim 7, wherein the top end of the upper electronics compartment module (803) is provided with an upper control end assembly (802).
  9. 9. The positioning tool for oil field operation with double magnets according to claim 8, wherein a non-rotating housing (806) is arranged outside the upper cruising driving shaft (801), an upper mud bearing (805) is arranged above the non-rotating housing (806) and connected with the upper cruising driving shaft (801), and a lower mud bearing (810) is arranged at the bottom end of the upper cruising driving shaft (801) and connected with the lower cruising driving shaft (804).
  10. 10. The positioning tool for oilfield operation with double magnets according to claim 9, wherein a plurality of guiding structures are uniformly arranged on the outer periphery of the non-rotating housing (806), and each guiding structure is connected with the lower electronic bin module (807) through a wire.
  11. 11. The positioning tool for oilfield operation with double magnets according to claim 10, wherein the guiding structure comprises a supporting block (808) and a hydraulic driving block (809), the hydraulic driving block (809) is connected with the supporting block (808), and the hydraulic driving block (809) is filled with pressure liquid and is supported outwards by the hydraulic driving supporting block (808).

Description

Positioning tool with double magnets for oilfield operation Technical Field The invention relates to the technical field of downhole testing instruments for petroleum drilling, in particular to a positioning tool with double magnets for oilfield operation. Background In the downhole operation process of the oil field, as the production demands are gradually increased and the oil field exploitation technology is gradually developed, the downhole positioning technology is gradually developed from the active positioning drilling technology to the passive positioning drilling technology, so that the real-time position of the downhole tool is determined in the downhole operation process. In the existing underground positioning technology, a magnetic short circuit with a magnet is usually installed in a screw rod of a spiral guiding device, the screw rod drives the magnet to rotate in underground work to generate a magnetic field, and a magnetic field signal measuring probe pipe is installed at a wellhead to measure the magnetic field generated by the underground magnet to determine the position of the device. In the prior art, the maximum size of a magnet in the magnetic short circuit is only about 10mm due to structural limitation because the magnetic short circuit is arranged on a screw rod, the strength of a magnetic field signal generated by the magnetic short circuit is weak and is not easy to receive when the magnetic short circuit works at a deeper underground position, and the accuracy of a measuring result is low. Therefore, in order to overcome the defects, the positioning tool with double magnets for oilfield operation is provided. Disclosure of Invention First, the technical problem to be solved Aiming at the defects of the prior art, the invention provides a positioning tool with double magnets for oilfield operation, which solves the problems that in the prior art, the accuracy of a measurement result is low, the direction of a downhole tool cannot be determined, and the magnetic short circuit is too far from the position of a drill bit due to weak magnetic field signal intensity. (II) technical scheme In order to solve the above problems, the present invention provides a positioning tool for oilfield operation with dual magnets, comprising: The positioning tool comprises a pulse short circuit, a central control short circuit, power generation short circuits, flexible short circuits and cruising short circuits which are sequentially connected end to end from top, a plurality of magnetic short circuits are arranged in the positioning tool, the positioning tool comprises an upper magnetic short circuit and a lower magnetic short circuit, the bottom end of the upper magnetic short circuit is connected with the top end of the pulse short circuit, the lower magnetic short circuit is arranged between the power generation short circuit and the flexible short circuit, the power generation short circuit and the flexible short circuit are arranged in the outer wall of the lower magnetic short circuit, a plurality of mounting grooves are uniformly formed in the outer wall of each magnetic short circuit, a magnet is arranged in each mounting groove, a cover plate sealing mounting groove is arranged at the top end of each mounting groove, a vertically through threading hole is formed in the side wall from the central control short circuit to the cruising short circuit, and a wire is arranged in the threading hole to connect the pulse short circuit, the central control short circuit, the power generation short circuit and the cruising short circuit to transmit power and signals. Preferably, the magnetic short circuit comprises a magnet framework, the mounting groove is positioned on the outer wall of the magnet framework, and a sealing ring is arranged between the magnet framework and the cover plate. Preferably, a plurality of fixing bolts are arranged in each mounting groove and connected with the cover plate. Preferably, a protection joint is arranged at the top end of the upper magnetic short circuit. Preferably, the number of the mounting grooves on the magnetic short joint is four. Preferably, the cruise is short-circuited to an upper cruise drive shaft and a lower cruise drive shaft, the upper end of which is connected to the lower end of the upper cruise drive shaft. Preferably, an upper electronic bin module is arranged in the upper cruising driving shaft, a lower electronic bin module is arranged outside the upper cruising driving shaft, and a control circuit board and a central control short circuit are arranged in the upper electronic bin module and the lower electronic bin module for signal transmission. Preferably, an upper control end assembly is arranged at the top end of the upper electronic bin module. Preferably, a non-rotating shell is arranged outside the upper cruising driving shaft, an upper mud bearing is arranged above the non-rotating shell and connected with the upper cruising driving