Dual-purpose tool as drill stem and well completion sieve tube

Abstract

The invention relates to petroleum and natural gas well drilling and well completion technology, in particular to a dual-purpose tool as a drill stem and a well completion sieve tube. The dual-purpose tool mainly comprises a drill stem body, a sieve tube body, a screen, a primary shear pin, a secondary shear pin, a valve seat body and a ball valve. The drill stem body comprises a drill stem hole, a drill stem body primary pin hole, a drill stem body primary inner diameter, a drill stem body secondary inner diameter and a drill stem body inner ledge, wherein the drill stem hole includes a series of radial spiral holes. The sieve tube body comprises a sieve tube lower seal groove, a sieve tube middle seal groove, a sieve tube upper seal groove, an annular clearance groove, a sieve tube trapezoid hole, a sieve tube primary inner diameter, a sieve tube secondary diameter, a sieve tube primary pin hole and a sieve tube secondary pin hole, wherein the sieve tube trapezoid hole is reserved in the annular clearance groove and the sieve tube trapezoid hole includes a series of radial trapezoid holes. The dual-purpose tool as the drill stem and the well completion sieve tube is compact in structure, east to implement, convenient to machine and low in cost.

Description

technical field [0001] The invention relates to a drill string and completion screen dual-purpose tool for oil and gas drilling and completion technology, especially for deep well and ultra-deep well drilling and completion operations, which can save the repetition of conventional drilling and completion operate. Background technique [0002] At present, with the development of drilling technology, that is, the development of deep wells, ultra-deep wells, horizontal wells, etc., the requirements for the strength and quality of the drill string are getting higher and higher, the completion operation is becoming more and more difficult, and the risks are also increasing. high. Moreover, in recent years, the safety production situation in the exploration and development of sulfur-containing gas fields in my country has been severe. In domestic oil and gas fields such as Jianghan, Xinjiang, Shengli, North China, and Sichuan, there have been many serious out-of-control blowout a...

AI Technical Summary

Problems solved by technology

Moreover, in recent years, the safety production situation in the exploration and development of sulfur-containing gas fields in my country has been severe. In domestic oil and gas fields such as Jianghan, Xinjiang, Shengli, North China, and Sichuan, there have been many serious out-of-control blowout accidents and hydrogen sulfide poisoning accidents, causing a large number of casualties or deaths. This led to the evacuation of a large number of people and brought serious adverse effects on the society.

my country's three-high (high pressure, high yield, high sulfur) gas fields are in the early stages of large-scale exploration and development, and there is a huge gap between the technical level of relevant personnel and equipment, quality and safety management systems, and overall development experience in sour gas fields. In such oil and gas fields, if the drill string is taken out after drilling and completion, and then lowered into the completion string for completion, more and greater risks will inevitably be added, and there will be more hidden safety hazards.

In addition, accidents such as drilling tools breaking and falling into wells and stuck pipes often occur during the tripping process of oil drilling. Once these accidents occur, drilling tool components fall into wells, and fishing operations must be carried out. Due to irregular fractures, the processing cost is high. In high hydrogen sulfide-containing gas layers, out-of-control blowout and hydrogen sulfide poisoning accidents may occur, resulting in a large number of casualties, major economic losses and potential safety hazards

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