WELL TESTING & COMPLETION TOOLS

Brief introduction
In middle drill string testing tool, connect pressure distributing valve between open hole packers. This kind of valve could adjust and distribute hydraustatic pressure between open hole packers and to every packer, which could avoid loss of seal cause of single packer could not bear testing differential pressure. The function is advantage for setting in unconsolidated layer or vertical fracture zone.
Structure feature
Pressure Distributing Valve is closed automatically when pressure sealed by packers is equal to determined operating pressure. Pressure Distributing Valve keeps closed in whole testing if testing reservoir pressure not higher than its operating pressure.

Technical specification

Size	ID(mm)	Length(mm)	Working temperature (℃)	Service circumstances	Thread connection
5’’	Ф42	758	-40℃~+150℃	Mud,crude oil, natural gas and water, which all without H2S	3 1/2’’FH.B×P

Brief introduction
Normally open valve mostly work with RTTS Packer, Y211 Packer or other mechanical packers.
After setting packer, install Christmas tree for displacing fluid. Drop ball to increase pressure for closing circulating port after displacing fluid, begin acidification & fracturing, completion operations etc.
Technical specification

OD (mm) ID(mm) Length(mm) Close differential pressure (MPa) Drop differential pressure (MPa)

Ф101.6 Ф60.3 350 5.8 5~20
Structure diagraph

OD (mm)	ID(mm)	Length(mm)	Close differential pressure (MPa)	Drop differential pressure (MPa)
Ф101.6	Ф60.3	350	5.8	5~20

Normally Open Valve

Brief introduction
Normally Closed Valve mostly work with hydraulic packer which set by differential pressure.
After operation and would to pull out of packer, drop ball to increase pressure for opening circulating port, make sure to balance pressure above & below packer when pulling out of completion string tools, could start directing & reversing operation.
Ⅱ type of normally closed valve could shoot ball valve to bottom, inject heavy crude oil by annulus, mix with down-hole back liquid and return to surface from string tool.

Technical specification