Changes
/* Summary of Hydraulic fracturing */
Various companies are using or developing different techniques for performing hydraulic fracturing in different operating condition and reservoirs.
==Multi Stage Fracturing==
'''Table: Multi Stage Fracturing patent of different Companies.'''
{|border="2" cellspacing="0" cellpadding="4" width="100%"
|align = "center" bgcolor = "#9BBB59" colspan = "4"|'''Multi Stage Fracturing'''
|-
|align = "center" bgcolor = "#9BBB59"|'''S.No'''
|align = "center" bgcolor = "#9BBB59"|'''Assignee'''
|align = "center" bgcolor = "#9BBB59"|'''Patent'''
|align = "center" bgcolor = "#9BBB59"|'''Comment'''
|-
|align = "center" bgcolor = "#9BBB59"|1
|align = "center"|'''Schlumberger'''
|align = "center"|<font color="#0000FF"><u>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220110024121%22.PGNR.&OS=DN/20110024121&RS=DN/20110024121 US20110024121A1]</u></font>
|align = "center"|Fracturing multilateral wellbores in a single mobilization of fracturing unit.
|-
|align = "center" bgcolor = "#9BBB59"|2
|align = "center"|'''####'''
|align = "center"|****
|align = "center"|****
|-
|}
These sections now concentrate on the work done by the companies or institutes.
===Schlumberger===
<font color="#0000FF"><u>[http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220110024121%22.PGNR.&OS=DN/20110024121&RS=DN/20110024121 US20110024121A1] </u></font> titled "Method and apparatus for multilateral multistage stimulation of a well" by Schlumberger. It employs a '''continuous multistage fracturing of lateral wells by wellbore isolation and focused fracturing placement'''. Fracturing multilateral wellbores in a single mobilization of fracturing unit(s) by sequentially connecting a fracturing tubing string to each lateral wellbore, directing a fracturing fluid at that specific lateral wellbore in a manner to achieve the desired fracturing and isolating those lateral wellbore after it is fractured.
-The technique involves drilling and fracturing a first lateral wellbore; plugging the first lateral wellbore; and then drilling and fracturing a second lateral wellbore, plugs or other suitable isolation devices to isolate lateral wellbores and to enable the fracturing of specific lateral wellbores.
Method enables the continuous pumping of fracturing fluid during fracturing of multiple lateral wellbores due to a single rig mobilization.
....[Contd]
