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Drill-pulling rock debris removal nipple, drill string combination and use method

A technology of cuttings and pup joints, which is applied in the field of puppets that can remove cuttings and drill string assembly, and can solve problems that affect drilling efficiency and increase drill string sliding friction.

Pending Publication Date: 2021-07-30
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the drill string is in the state of sliding drilling, the drill string type cuttings bed removal tool is sliding and scraping the cuttings bed, and at the same time increases the sliding friction of the drill string, thus affecting the improvement of drilling efficiency
Moreover, the existing way of removing the cuttings bed is simply destruction, and the destroyed cuttings will inevitably settle in other places in the wellbore to form a new cuttings bed

Method used

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  • Drill-pulling rock debris removal nipple, drill string combination and use method
  • Drill-pulling rock debris removal nipple, drill string combination and use method
  • Drill-pulling rock debris removal nipple, drill string combination and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 A short joint for drilling and removing debris, including a main body 2, a grit chamber 5 and a sliding sleeve 6 arranged inside the main body 2 in sequence, an upper joint 1 is provided at the left end of the main body 2, and a lower joint 12 is provided at the right end; The grit chamber 5 is slidingly connected to the body 2, and is detachably connected to the sliding sleeve 6; the grit chamber 5 is provided with a grit cavity 13 along its side wall, and a cylindrical key is provided on the side wall , the end of the cylindrical key close to the body 2 is provided with a compression spring 9, the center of the grit chamber 5 is provided with a flow channel of the grit chamber 5, the length of the grit chamber 13 is the same as the side wall of the grit chamber 5, and the grit chamber The depth of 13 is the same as the thickness of the side wall of the grit chamber 5; the upper end of the sliding sleeve 6 is provided with a setting seat 3, the side wall facin...

Embodiment 2

[0036] On the basis of Embodiment 1, it also includes: the outer diameter of the grit chamber 5 is the same as the inner diameter of the body 2 , and the inner diameter is the same as the outer diameter of the sliding sleeve 6 . The grit chamber 5 is connected to the body 2 through threads, and the sliding sleeve 6 and the grit chamber 5 are connected to the left end of the grit chamber 5 through a shear pin 4 . The diameter of the fixing groove 8 is larger than the diameter of the cylindrical key, and the depth of the fixing groove 8 is smaller than the length of the cylindrical key 10 . The upper joint 1 is a drill pipe box buckle type, and the lower joint 12 is a drill pipe pin buckle type.

Embodiment 3

[0038] A drill string assembly for tripping out and removing debris, comprising any of the above mentioned tripping and cuttings removing nipples, and stabilizers 17 are respectively connected to both ends of the pulling out and cuttings removing nipples. The stabilizing bars of the stabilizer 17 are straight edges or helical edges.

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PUM

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Abstract

The invention relates to a drill-pulling rock debris removal nipple, a drill string combination and a use method. The nipple comprises a body, a sand setting cylinder and a sliding sleeve; the sand setting cylinder and the sliding sleeve are sequentially arranged in the body; an upper connector is arranged at the left end of the body, and a lower connector is arranged at the right end of the body; the sand setting cylinder is in sliding connection with the body and is detachably connected with the sliding sleeve; a sand setting cavity is formed in the side wall of the sand setting cylinder; a cylindrical key is arranged on the side wall of the sand setting cylinder; a compression spring is arranged at the end, close to the body, of the cylindrical key; a sand setting cylinder flow channel is formed in the center of the sand setting cylinder; the length of the sand setting cavity is the same as the length of the side wall of the sand setting cylinder; the depth of the sand setting cavity is the same as the thickness of the side wall of the sand setting cylinder; a setting seat is arranged at the upper end of the sliding sleeve; a fixing groove is formed in the side, facing the sand setting cylinder, of the side wall; a center flow channel is formed in a center; the diameter of the center flow channel is the same as the diameter of the sand setting cylinder flow channel; and a liquid suction hole is also formed in a position, corresponding to the sand setting cavity, of the body. The drill-pulling rock debris removal nipple is simple in structure and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of drilling, and in particular relates to a pup joint, a drill string assembly and a use method that can remove cuttings from drilling. Background technique [0002] During the drilling process, the solid particles in the borehole are affected by gravity, viscous resistance, impact force, and buoyancy. When the cuttings concentration is greater than the working capacity of these forces, the cuttings will settle to form a cuttings bed, which seriously affects the ROP, drilling resistance increases, especially in directional wells and horizontal wells, it is easy to form downhole pressure decompression, resulting in no drilling pressure at the drill bit, no footage for a long time, slow project progress, and increased drilling costs; cuttings bed causes The torque of the drill string increases, and in severe cases, the drill string in the well may even be twisted, resulting in serious downhole accidents; the c...

Claims

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Application Information

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IPC IPC(8): E21B17/042E21B21/00
CPCE21B17/042E21B21/00
Inventor 杨全枝张晓斌李玉红
Owner SHAANXI YANCHANG PETROLEUM GRP