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CN-121976746-A - Novel impact-resistant screw drilling tool universal shaft and screw drilling tool

CN121976746ACN 121976746 ACN121976746 ACN 121976746ACN-121976746-A

Abstract

The invention belongs to the technical field of roller bit, and in particular relates to a novel impact-resistant screw drilling tool universal shaft and a screw drilling tool, comprising a drill bit body, a plurality of blades arranged on the drill bit body and composite sheets arranged on the blades, wherein the blades comprise at least one short blade, and the composite sheets on the short blade are arranged in a reverse spiral structure; and at least one long blade, wherein the composite sheet on the long blade is arranged in a spiral structure. By arranging the composite sheet on the short blade into a reverse spiral structure, the peripheral cutting teeth of the drill bit are in contact with the rock preferentially, and an island effect is formed at the central part to release the internal stress of the rock, so that the rock is easier to break, and the mechanical drilling speed is improved by 2-3 times.

Inventors

  • WANG JUNLI
  • LI DATAO
  • LUO XULIANG
  • HUANG YUMING
  • LIU HAINING

Assignees

  • 天津立林石油机械有限公司

Dates

Publication Date
20260505
Application Date
20260228

Claims (8)

  1. 1. A novel impact-resistant screw drilling tool cardan shaft is characterized by comprising The novel universal joint type water cap comprises a movable winch (1), a first lengthened locking sleeve (2), a novel universal shaft connecting rod (3), a second lengthened locking sleeve (4), a novel universal joint type water cap (5), a ball seat (6), a ball cap (7), a pressing ring (8) and a rubber sleeve (9); Wherein, the The first lengthened locking sleeve (2) is sleeved and fixed outside one end of the movable hinge (1); the upper end of the novel universal shaft connecting rod (3) is movably connected with the lower end of the movable winch (1), and the first lengthened locking sleeve (2) is sleeved outside the joint of the movable winch (1) and the novel universal shaft connecting rod (3); the second lengthened locking sleeve (4) is sleeved and fixed outside the lower end of the novel universal shaft connecting rod (3); The upper end of the novel universal conjoined water cap (5) is movably connected with the lower end of the novel universal shaft connecting rod (3), and the second lengthened locking sleeve (4) is sleeved outside the joint of the novel universal shaft connecting rod (3) and the novel universal conjoined water cap (5); The ball seat (6) is arranged below the novel universal conjoined water cap (5) and is connected with the lower end of the novel universal conjoined water cap (5); The ball cap (7) is sleeved outside the ball seat (6); The pressing ring (8) is sleeved outside the ball cap (7) and is fixedly connected with the ball seat (6); The rubber sleeve (9) is sleeved outside the novel universal shaft connecting rod (3), the upper end of the rubber sleeve is in sealing connection with the lower end of the first lengthened locking sleeve (2), and the lower end of the rubber sleeve is in sealing connection with the upper end of the second lengthened locking sleeve (4).
  2. 2. The novel impact-resistant screw drill cardan shaft according to claim 1, characterized in that the lower end of the first elongated locking sleeve (2) extends downwards to cover the outer side of the upper end of the rubber sleeve (9), and the upper end of the second elongated locking sleeve (4) extends upwards to cover the outer side of the lower end of the rubber sleeve (9).
  3. 3. The novel impact-resistant screw drilling tool universal shaft according to claim 1, wherein the upper end part and/or the lower end part of the novel universal shaft connecting rod (3) is/are provided with a diversion inclined plane, and the diversion inclined plane is used for changing the flowing mud direction so as to deviate from the outer surface of the rubber sleeve (9).
  4. 4. The novel impact-resistant screw drilling tool universal shaft according to claim 1, wherein the lower end of the novel universal connected water cap (5) is in sealing fit with the upper end of the ball seat (6) so as to prevent mud from entering the ball seat (6).
  5. 5. The novel impact-resistant screw drill universal shaft according to claim 1, wherein a sealing space is formed between the inner wall of the ball cap (7) and the outer wall of the ball seat (6), and the ball cap (7) is pressed and fixed on the ball seat (6) by the pressing ring (8).
  6. 6. The novel impact-resistant screw drilling tool universal shaft according to claim 1, wherein the first lengthened locking sleeve (2) and the movable winch (1) and the second lengthened locking sleeve (4) and the novel universal shaft connecting rod (3) are in threaded connection or welded fixation.
  7. 7. The novel impact-resistant screw drill universal shaft according to claim 1, wherein two ends of the rubber sleeve (9) are respectively connected with the first lengthened locking sleeve (2) and the second lengthened locking sleeve (4) in a sealing mode through sealing rings.
  8. 8. A screw drilling tool comprising a novel impact-resistant screw drilling tool cardan shaft according to any one of claims 1 to 7.

Description

Novel impact-resistant screw drilling tool universal shaft and screw drilling tool Technical Field The invention belongs to the technical field of roller bit, and particularly relates to a novel impact-resistant screw drilling tool universal shaft and a screw drilling tool. Background In petroleum and natural gas drilling operation, the screw drilling tool is used as a downhole power drilling tool and is widely applied to the drilling process of directional wells, horizontal wells and large-displacement wells. The main function of the device is to convert the pressure energy of drilling fluid into mechanical energy and drive the drill bit to rotate to break rock. The universal shaft is used as one of the key transmission parts of the screw drilling tool and plays an important role in converting the planetary motion of the motor into the fixed shaft motion of the transmission shaft and transmitting torque and rotating speed. The traditional screw drilling tool cardan shaft has various structural forms, and petal type cardan shafts are adopted in early stages. The structure works under the condition of slurry lubrication, and torque and rotating speed are transmitted by virtue of the point-line contact between the movable winch and the connecting rod. However, the slurry contains a large amount of solid phase particles, so that the slurry has strong erosion, and the abrasion of petal contact surfaces is easy to be increased, the gap is increased, the transmission efficiency is reduced, even the slurry fails, and the whole service life of the screw drilling tool is seriously influenced. In order to solve the above problems, a ball and column type sealed universal shaft was developed subsequently. The movable hinge is connected with the connecting rod through the plurality of ball posts to form line-line contact, and the structure has certain wear resistance and bearing capacity. However, in practical application, especially under the drilling working conditions of deep well, large discharge capacity and large bit pressure, the slurry flow speed is high, the impact force is large, and the damage to the rubber sleeve of the universal shaft is caused by the direct erosion of the slurry, so that the sealing failure is caused, the slurry enters the transmission part, the abrasion is accelerated, and finally the function of the universal shaft is lost. In summary, the existing cardan shaft of the screw drilling tool still has obvious shortcomings in coping with high-flow-rate slurry erosion, improving sealing reliability and prolonging service life, and there is a need to optimize and improve the cardan shaft structure so as to improve the capability of adapting to complex drilling conditions. Disclosure of Invention The invention aims to provide a novel impact-resistant screw drilling tool universal shaft and a screw drilling tool, which are used for solving the problems in the background technology. In order to achieve the above purpose, the invention provides the following technical scheme that the novel impact-resistant screw drilling tool universal shaft comprises The novel universal joint comprises a movable hinge, a first lengthened locking sleeve, a novel universal shaft connecting rod, a second lengthened locking sleeve, a novel universal joint water cap, a ball seat, a ball cap, a pressing ring and a rubber sleeve; Wherein, the The first lengthened locking sleeve is sleeved and fixed outside one end of the movable hinge; the upper end of the novel universal shaft connecting rod is movably connected with the lower end of the movable hinge, and the first lengthened locking sleeve is sleeved outside the joint of the movable hinge and the novel universal shaft connecting rod; the second lengthened locking sleeve is sleeved and fixed outside the lower end of the novel universal shaft connecting rod; The upper end of the novel universal conjoined water cap is movably connected with the lower end of the novel universal shaft connecting rod, and the second lengthened locking sleeve is sleeved outside the joint of the novel universal shaft connecting rod and the novel universal conjoined water cap; The ball seat is arranged below the novel universal conjoined water cap and is connected with the lower end of the novel universal conjoined water cap; The ball cap is sleeved outside the ball seat; The pressing ring is sleeved outside the ball cap and fixedly connected with the ball seat; The rubber sleeve is sleeved outside the novel universal shaft connecting rod, the upper end of the rubber sleeve is in sealing connection with the lower end of the first lengthened locking sleeve, and the lower end of the rubber sleeve is in sealing connection with the upper end of the second lengthened locking sleeve. Preferably, the lower end of the first elongated locking sleeve extends downward to cover the outer side of the upper end of the rubber sleeve, and the upper end of the second elongated locking sleeve extends upward to