XLink-131  is a self-buffering,  highly concentrated  borate  crosslinker  for  fracturing  fluids.  In  most  “fresh”  waters  used   in  fracturing operations,  XLink-131  requires  no  pH   control  additives.  This  property  makes  it  a  very economical  and  operationally  easy  to  use  product  for  any  application   where  a  non-delayed borate crosslinker is desired.

XLink-132  is  a  concentrated,  highly  efficient and  cost  effective  borate  crosslinker  for  fracturing  fluids  based  on   guar,  HPG  or CM HPG.  It  is  effective  to  tem peratures  of  at  least  225°  F.

XLink-133  is a naturally-delayed  borate crosslinker  for  guar-based  fracturing  fluids.  The  product  is  winterized  to   below  zero  Fahrenheit.

Link-134  is a naturally-delayed  borate  crosslinker  for  guar-based  fracturing  fluids.  It  is  winterized  adequately  for   year  round  use  in  Texas  or  the  Mid-Continent. XLink-134  performs  almost  identically  and  is  suggested  for  use   in  very  cold  conditions

XLink-135  is a naturally-delayed  borate crosslinker  for  guar-based  fracturing  fluids.  The  product  is  designed  for   use in warmer climates: XLink-133  is  suggested  for  use  in  cold  weather  areas.

XLink-136  is  a  naturally  delayed  borate  crosslinker  for  guar-based  fracturing  fluids.  It  has  the  added  benefit  of   developing  a  crosslink  at  surface  temperatures  within  a  few  minutes  without  the  use  of  an  additional  instant  crosslinker.

XLink-137A  is an alum inum-based  crosslinker designed  for  use  in  self-diverting acid systems.

XLink-138D  is  a  zirconium  crosslinker  for derivatized  guar  based  frac  fluids.  It  is  effective in  low  pH  systems  and   is  compatible  with  CO2. XLink-138D  was  designed  to  yield  delayed crosslinks at moderate temperatures (up   to  200°F),  but  can  also  be  used  in  conjunction  with XLink-138S when delays  are  needed  at  lower temperatures.

XLink-138S  is  a  zirconium  crosslinker  for  guar and  derivatized guar based frac  fluids.  It  is  effective  in  low  pH   systems  and  is  compatible with  CO2.  XLink-138S  was  designed  to  yield surface  crosslinks  at  low  temperatures,   but  can also  be  used  in  conjunction  with  XLink-138D  when  a  delay  is  needed.  XLink-138S  is  also  an effective   crosslinker  in  guar  based  frac  fluids  at neutral  pH,  especially  in  very  hard  waters  where buffering  from  pH  9   to  10  is  often  times  difficult.

XLink-139D  is  a  concentrated  aqueous  based  zirconium  crosslinker  for  derivatized  guar  frac  fluids.  It  is  effective  in   high  pH  system s.  It  has  currently  been  tested  to  temperatures as high as 350°F. Use of XLink-139D in  conjunctions  with  small  quantities  of  XLink-138S  can  also  make  it  possible  to  achieve  controlled  crosslink   delays  with  derivatized  guar.

XLink-140D  is  an  alcohol  base  zirconium  crosslinker  for  derivatized  guar  based  frac  fluids.  It  is  effective  in  high  pH   systems.  It  has  currently  been  tested  to  temperatures  as  high  as  375°F.  Use  of  X Link-140D  in  conjunction  with   small  quantities  of  XLink-138S  can  also  make  it  possible  to achieve controlled crosslink delays with derivatized  guar..