Unlock instant, AI-driven research and patent intelligence for your innovation.

A double-channel drilling downhole floating valve

A dual-channel, drilling technology, applied in wellbore/well valve devices, wellbore/well components, earth-moving drilling, etc. The effect of reducing the likelihood of spring failure

Active Publication Date: 2022-03-15
CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current downhole float valve can only isolate one channel, and cannot isolate two channels at the same time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A double-channel drilling downhole floating valve
  • A double-channel drilling downhole floating valve
  • A double-channel drilling downhole floating valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] combined with Figure 1-3 The present invention is further described:

[0031] The present invention is composed of an outer tube 1, an inner tube 2, an upper sealing assembly 3, an inner valve core 4, an outer valve core 5, a spring 6, a lower sealing assembly 7, and a flow conversion part 8; the inner tube 2 is located on the outer In the layer pipe 1, the relative positions of the two are fixed (the inner layer pipe 2 is located in the outer layer pipe 1, and the structure used to connect the inner layer pi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a dual -channel drilling valve, including the outer tube, the inner tube, the upper seal assembly, the inner valve core, the outer valve core, the elastic piece, the lower secret seal assembly, and the flow conversion component.The invention is easy to replace after the sealing area is damaged through the upper seal assembly and lower secret sealing assembly of the thread connection; the spring that is set in the sealing capacity space is not naked and under the flow drilling solution, which effectively reduces the possibility of spring failure and improves damage damage.Life life of pieces.

Description

technical field [0001] The invention relates to the field of oil and natural gas drilling engineering, in particular to a downhole floating valve used for double-channel drilling. Background technique [0002] As a drilling technology for oil and gas exploration and development, dual-channel drilling (Reelwell Drilling Method) uses a double-walled drill pipe (coaxial dual-channel drill pipe) to realize the input and return of drilling fluid. The outer channel between the inner wall and the outer wall of the double-wall drill pipe is used to send drilling fluid from the ground to the bottom of the well, and the inner channel inside the double-wall drill pipe is used to return the drilling fluid from the bottom of the well to the ground. At the bottom of the double-wall drilling tool, the drilling fluid enters the downhole drilling tool assembly (BHA) from the outer channel of the double-wall drill pipe, and reaches the bottom of the well through the water hole of the drill bi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/08E21B33/06
CPCE21B34/08E21B33/06
Inventor 王宁李汉兴杨向前刘书杰周超任美鹏
Owner CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD