Superdeep well great displacement high performance boring tool protector for well

Abstract

The invention relates to a high performance driller protector which is used for a mud medium ultra deep well and an ultra deep well extended reach well with strong vibration, high friction and high possibility of failure. The driller protector has the functions of lubricating strongly, centralizing, reducing friction and resistance, releasing the bushing camber wear, preventing a key slot from clamping and the driller and protecting a connector. The technical proposal is as follows: a coupling housing is arranged at a centralizer connector body, the outside surface is provided with a medium flow passage and a tapered pressure groove which are uniformly distributed on the coupling housing in a spaced way; the inner part is provided with a pair of rolling bearings directly interference arranged on the connector body; the rolling bearings and the sleeve as well as the self-lubricating obturating ring set are respectively arranged on the inner surface of the two ends of the coupling housing symmetrically; and a middle filling cavity of the two rolling bearings and a top filling cavity between the bearings and the connector body are filled with graphite. The driller protector has strong ability to decrease vibration and to release the abrasion of the drill pipe and the bushing, reduces the torque, increases the drilling ability, has a simple structure and low cost, and is used for drilling in an oil-gas field.

Description

technical field [0001] The invention relates to an ultra-deep extended-reach well for deep and ultra-deep wells with mud medium, drill collars and lower drill pipes that are prone to drill tool failure due to severe vibration and high friction, and inclined well sections and horizontal sections of extended-reach wells Use a drill protector. Background technique [0002] The development of drilling technology for ultra-deep wells (vertical wells with a depth of 6,000 to 9,000 meters) is based on modern drilling technology. The main technical difficulties are: high temperature and high pressure, multi-pressure systems, piedmont structures, and difficult-to-drill formations. my country's deep and ultra-deep wells started late, but have developed rapidly in recent years, and have formed a road that combines independent research and development with selective absorption of foreign advanced technology. After years of hard work, the international market competitiveness has been gra...

AI Technical Summary

Problems solved by technology

In field practice, due to the excessive friction torque of the pipe string, the following situations may occur: the drilling tool cannot be lifted up or the drilling tool breakage accident occurs;

Images