Hydraulic Jet Radial DrillingTechnology

1.Technical Theory：

 Opening the Reservoir with bit parts of the casing milling.

 With jet bit of hose, with the aid of high pressure jet of hydraulic rock fragmentation；

 A process technology of drill multi- hole in oil reservoir

2.Apply

（1）Well condition

 Within 3300m depth.

 Casing Grand less than P110

 Casing Size 4 1/2″-7”

 Maximum deviation is less than 35

（2）Wellbore Condition：

 Casing have no obvious change, ensure the guide

 string assignment asks you to clean oil, under well to use the machine for general well

 Job treatment before wash well, and to ensure that the borehole is clean

 Jet operations require standing bag space

（3）Apply Formation

Sandstone, Carbonate, Argillaceous Siltstone, Mud shale, Coal seam

（4）Applicable reservoir

 reservoir more than 1.5 m

 interlayer well developed up and down

 sand is not serious

 fault clear

 clear oil and gas distribution

3、Job Parameter

 a radial branch to the coiled tubing under (0.5) in two times

 borehole diameter 1 ~ 3in

 penetration depth 0-100 - m

 design temperature under 120 ℃ (up to 160 ℃), the highest pressure to 20000 psi

 maximum operating depth of 3300 m (successfully)

 solid free drilling fluid, the liquid filter below 10 um

 in depth of more than 2500 meters, need to use the injection head

 suppose single-well 4 hole, homework time 2-4 d

4、Technical Advantage

 Only on the oil string with a local window, small on casing damage, reservoir is not easy to collapse

 radial hole can be in different drilling, can undertake multi-layer construction in thick oil layer

 no need the rotation of the drill string and bit, reduced the occurrence of downhole complicated conditions

 Don't produce mud cake pollution。

 short operation period, quick effect