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CN-224214142-U - Self-guiding fishing spear and fishing tool string

CN224214142UCN 224214142 UCN224214142 UCN 224214142UCN-224214142-U

Abstract

The utility model provides a self-guiding type fishing spear and a fishing tool string, wherein the self-guiding type fishing spear comprises a guiding cylinder and a solid spear, the guiding cylinder is arranged outside the solid spear, a joint body is arranged at the upper end of the guiding cylinder, a forward rotation poking port is arranged at the lower end cylinder opening of the guiding cylinder, a spear tile sliding groove is arranged on the outer circumferential surface of the solid spear, the spear tile sliding groove is an arc sliding groove with a small outside and a large inside, a forward rotation sliding block spear tile is arranged in the spear tile sliding groove, and the upper end of the solid spear is fixed on the inner wall of the top end of the guiding cylinder. The fishing tool string comprises the self-guided fishing spear. The fishing spear can easily enter the fish falling water hole to fish the fish.

Inventors

  • ZHANG JIE
  • ZHOU KE
  • WANG MINGHUA
  • LI XIAOGANG
  • DUAN JINLIN
  • LI GAOWEN
  • ZHUO YUN
  • HU CHENG
  • DENG HUI
  • ZHOU JIN

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
20231230

Claims (10)

  1. 1. A self-guiding fishing spear is characterized by comprising a guiding barrel and a solid spear, wherein, The guide cylinder is arranged outside the solid spear, the upper end of the guide cylinder is provided with a joint body, and the cylinder opening at the lower end of the guide cylinder is provided with a positive rotation shifting opening; The outer circumferential surface of the solid spear is provided with a spear tile chute which is an arc chute with a small outside and a large inside, a normal rotation slide block spear tile is arranged in the spear tile chute, and the upper end of the solid spear is fixed on the inner wall of the top end of the guide cylinder.
  2. 2. The self-guided fishing spear of claim 1 wherein the spear includes an upper spear and a lower spear, the upper spear diameter being 38-40 mm and the lower spear diameter being 34-36 mm.
  3. 3. The self-guided fishing spear of claim 1 wherein the outer diameter of the guide barrel is 190-192 mm and the inner diameter of the guide barrel is 145-148 mm.
  4. 4. The self-guided fishing spear of claim 1 wherein a connector is provided between the spear and the guide barrel, the connector being fixedly connected to a solid spear.
  5. 5. The self-guided fishing spear of claim 1, wherein a spear tile stopper is fixedly disposed in the spear tile chute.
  6. 6. The self-guided fishing spear according to claim 1, wherein the joint body is provided with a connection port inside, and a connection structure is provided in the connection port.
  7. 7. The self-guiding fishing spear of claim 1 wherein the joint body is provided with a marking slot at the junction with the guiding barrel.
  8. 8. The self-guided spear of claim 1 wherein a port is provided between the connector body and the guide barrel.
  9. 9. The self-guided spear of claim 1 wherein the solid spear lower end is provided with a guide shoe.
  10. 10. A fishing tool string comprising the self-guided fishing spear of any one of claims 1-9.

Description

Self-guiding fishing spear and fishing tool string Technical Field The utility model relates to the field of petroleum drilling engineering, in particular to a self-guiding fishing spear and a fishing tool string. Background Shale gas wells continue to develop with the development of science and technology, shale gas horizontal well horizontal sections continue to extend from the initial 800-1000 m, 1000-1500 m, 1500-2000 m, 2000-2500 m and the like to longer. The continuous extension of horizontal segments is due to the wide range of rotary steerable tools. The domestic and imported rotary guiding continuously enters the market, the rapidly-growing requirement cannot be met, the situation that the rotary guiding tool is adopted to directionally drill or even stop by adopting a conventional bent screw or a straight screw matched with a bent joint is more serious, the rotary guiding tool after entering the market cannot be maintained due to the fact that the number of times of changing the rotary guiding tool is continuously increased, for example, shan Jingci of 2000m horizontal segments is increased, and most of software faults such as communication systems are caused. In actual production, hardware faults such as flexible short sections of the rotary guiding tool and breakage of a lower driving shaft also occur continuously. In particular, when the lower driving shaft is broken, the outside diameter of the fish is large, the rings are small, the fish is short and light, the fish is easy to rotate along with the fishing drilling tool, the height difference appears at different degrees in the axial direction of the broken surface, and meanwhile, the well inclination and the azimuth are continuously adjusted at the horizontal section due to the change of the dip angle of the producing layer, so that the smoothness of the well hole is poor. The rock debris bed is inconvenient to clean in a horizontal section, and underground complex and even drilling sticking accidents are easy to occur. In order to prevent the drilling tool from being pulled out by reversely scratching the hole, the rotary guide driving shaft is broken, salvaged and pulled out, the reversely scratching hole is needed to pull out the fish, the conventional female cone is used for fishing out or the conventional male cone is used for fishing out so as to meet the requirement of reversely scratching the hole, when the axial height difference of the fracture surface of the rotary guide driving shaft is large, the upper residual driving shaft body gives a radial component force to the male cone, the male cone is always caused to slide outwards and fracture the well under the action of the drilling pressure force, and the conventional fishing spear rotates after grasping the fish, so that the fish is lost. Therefore, it is necessary to design a self-guiding type reversible reaming fishing spear for a fishing rotation guiding driving shaft, which overcomes the defects of the existing fishing spear and solves the problems of rotation releasing and basically no torsion resistance. The method aims to obtain the maximization of the tensile resistance and the torsion resistance of the combination of the fishing spear and the spear tile under the limited diameter, breaks through the technical problem that the axial height difference is large without an inner fishing tool after the drive shaft is broken, and reduces the economic loss caused by the drive shaft breaking to the maximum extent. Chinese patent with publication number CN202596639U and name "reaming type back-off device" discloses a back-off device for cleaning collapsed blocks at the water hole of dead fish to complete back-off fishing. The reaming type back-off device comprises a spear body and an expansion mandrel, wherein an internal thread is arranged at the upper part of the spear body, a first step is fixed at the inner side of the middle part of the spear body, the upper part of the expansion mandrel is fixedly connected with the first step through the thread and at least one radial positioning device, a through hole is formed in the middle part of the expansion mandrel along the axial direction, and an expansion sleeve is sleeved on the expansion mandrel below the first step. Through the cooperation use of pin and inclined plane, can realize the quick clearance and block up the purpose that the piece of collapsing of falling fish water hole department was accomplished the back-off and was salvaged. Unlike this patent, the present utility model adjusts the structure of the guide barrel to reduce the risk of the spear being inserted between the fish and the well wall ring. The fishing spear is also adjusted on the basis of the prior art, so that the connection strength between the spear and the guide cylinder is enhanced, accidents in the fishing process are avoided, and the biting force is enhanced. Disclosure of utility model The present utility model aims to address at least one of the