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

Multi-zone screened frac system

A multi-zone, fracturing technology, applied to wellbore/well components, construction, production fluids, etc.

Inactive Publication Date: 2014-03-26
WEATHERFORD TECH HLDG LLC
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using a conversion tool has several disadvantages

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
  • Multi-zone screened frac system
  • Multi-zone screened frac system
  • Multi-zone screened frac system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] Various embodiments of a multi-zone screening fracturing system are disclosed. The system does not require conversion tools as required in the prior art. In some implementations, the system doesn't even require a complete repair kit. To perform fracturing operations on multiple zones in a cased or open hole borehole, the system includes: (1) a well screen with integrated check valves, (2) fracturing valves, and (3) Optional diverter pipe for mortar dewatering. The system can also include fiber optic technology.

[0032] In the first embodiment according to the present disclosure, figure 1 Shown is a multi-zone screened frac system 10 disposed in a casing borehole and having sections with frac valves and flow devices including well screens and check valve devices . System 10 includes an upper completion or work string 14 disposed in casing 12 . This tubing string 12 is engaged into the upper well end 24 of the production tubing string 22 of the frac assembly 20 and...

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

A multi-zone screened frac system combines screens with integrated check valves, frac valves, and optional shunt tubes for slurry dehydration. The system can also include fiber optic technology. In particular, the system uses sliding sleeves and flow devices for each section. The sliding sleeves open with dropped balls or a service tool, and the flow devices have screens and act as check valves. Dehydration tubes can also be used. The system does not require a crossover tool, and in some implementations, the system does not even require a complete service tool.

Description

[0001] Cross References to Related Applications [0002] This application is a non-provisional application of and claims priority to US Provisional Application 61 / 506,897, filed July 12, 2011, which is incorporated herein by reference. Background technique [0003] Many wells are fractured with proppant (eg, sand, etc.) to treat the formation and improve production. In many cases, multiple fractures are performed in a single wellbore to treat different regions of interest in the formation. Systems exist in the art that allow operators to fracture multiple zones in a wellbore in a single pass. Some systems even use well screens to prevent proppant backflow during operation. [0004] Unfortunately, existing systems that include well screens operate using service conversion tools. The transition tool spans the fluid flow path from the work string to the annulus outside the well screen and vice versa. However, using a conversion tool has several disadvantages. [0005] A subj...

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 Applications(China)
IPC IPC(8): E21B34/00
CPCE21B34/14E21B43/26E21B43/14E21B43/08E21B43/267E21B2200/06E21B34/142
Inventor 罗纳德·万佩泰盖姆
Owner WEATHERFORD TECH HLDG LLC