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Underground rotational flow solid-liquid separation well drilling speed increasing tool

A liquid separation and tool technology, which is applied in the field of downhole swirling solid-liquid separation drilling speed-increasing tools, achieves the effects of small impact, good stability, and prolonging the life of the drill bit

Active Publication Date: 2021-01-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the existing downhole swirl separation technology, and to design and provide a downhole swirl solid-liquid separation drilling speed-increasing tool. The solid phase content of the drilling fluid ejected from the drill nozzle can reduce the wear of the drill bit and improve the rock-breaking environment of the drill bit, thereby indirectly increasing the drilling speed

Method used

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  • Underground rotational flow solid-liquid separation well drilling speed increasing tool
  • Underground rotational flow solid-liquid separation well drilling speed increasing tool
  • Underground rotational flow solid-liquid separation well drilling speed increasing tool

Examples

Experimental program
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Embodiment

[0020]The main structure of the downhole swirling solid-liquid separation drilling speed-increasing tool described in this embodiment includes an upper joint 1, an outer cylinder 2, an overflow pipe suspension seat 3, an overflow pipe 4, a guide vane 5, a conical cylinder 6, and a positioning bolt 7. The lower diverter seat 8, the lower joint 9, the nozzle seat 10 and the side nozzle 11, the upper joint 1 and the lower joint 9 are connected to the two ends of the tool outer cylinder 2 through threads, the upper joint 1 is connected with the external drill string, and the lower joint 9 It is connected with the external drill bit; there is an inlet channel 12 in the middle of the upper joint 1, and an outlet channel 19 is opened in the middle of the lower joint 9; the upper joint 1 presses the overflow pipe suspension seat 3 on the boss in the outer cylinder 2; The overflow pipe 4 is fixed on the lower end of the overflow pipe suspension seat 3 by bolts, and the outer side of the...

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Abstract

The invention belongs to the technical field of oil and gas drilling, and relates to an underground rotational flow solid-liquid separation well drilling speed increasing tool. A guide vane structureis utilized to generate a rotational flow field, a hydraulic rotational flow separation principle is utilized to realize solid-liquid separation of drilling fluid in the tool, and the solid content ofthe drilling fluid sprayed to the bottom of a well is decreased through the underground rotational flow separation effect. The chip hold down effect of the drilling fluid on well bottom rock debris is reduced, the clearing effect of the drilling fluid on the rock debris is improved, the rock breaking environment of a well bottom drill bit is improved, thus the well drilling speed is increased, the abrasion speed of the drill bit can further be reduced through the low-solid-content drilling fluid, and the service life of the drill bit is prolonged.

Description

Technical field: [0001] The invention belongs to the technical field of petroleum and natural gas drilling, and relates to an downhole swirling solid-liquid separation drilling speed-increasing tool. During the drilling process, the tool can perform solid-phase removal treatment on the drilling fluid entering the drill bit and reduce the drilling fluid ejected from the drill bit nozzle. Solid phase content reduces drill bit wear and improves the rock-breaking environment of the drill bit, thereby indirectly increasing the drilling speed. Background technique: [0002] Drilling fluid is an essential drilling fluid in conventional oil and gas drilling. It has many important functions such as cleaning the bottom of the well, carrying cuttings, cooling the drill bit, and balancing formation pressure. It is called the blood of drilling. Solid phase content is one of the important indicators to measure the performance of drilling fluid. It refers to the percentage of the volume of...

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B10/60E21B33/138B01D21/26
CPCE21B21/002E21B10/60E21B33/138B01D21/267
Inventor 倪红坚张恒
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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