iCWD - intelligent Circulation Sub

iCWD - intelligent Circulation Sub

One month ARO.
? Standard delivery time Ex Works.

Circulating sub Slim Tool OD (inch): 5"

Standard Tool Model 700 OD (inch): 7" for drilling 8.5" section

Large Size Tool Model 825 OD (inch): 8.25"

See complete description



Intelligent Circulation While Drilling tool, iCWD, is a multi cycle circulating sub that does not require a drop ball, dart or token to operate. It does not even require to break a connection or drop slips to activate.


iCWD has four modes of operation namely defalut drilling, bypass, dual flow for hole cleaning and isolation modes. The iCWD is operated from surface using the patented Agile (R) activation system through a downlink of RPM, or change of flow rate. 

iCWD can even operate when flow is not possible for example in situation such as packed off hole or plugged bit nozzle, where in such a case the iCWD can be operated through a timed sequence of pressure to the drilling string.

iCWD can be operated from any mode to anymode, in any seqence, practically any number of times, and through any of the Agile activation mechanism in any order.


iCWD incorporates Smart Electronic and sensors which enables operators to run multiple tools in the same string spaced out as required with each independently controlled and activated into any desired mode.


iCWD design is based on a remotely controlled 3-way ball valve for drilling systems and was jointly developed by MIT Technologies and Petronas. Engineer-Less operation. Automatic power up, and Driller Caddie activation assistance installed on one 2 certified wearable watch or Zone 2 certified mobile (provided with the tool).

Sour environment.

Special preparation will be required for H2S or CO2 services.

Product Details
Type of product Circulating sub
Application Agile activation sytem does not require mechancial access to the tool, hence can be placed below interrupted mud passage such as below LWD or below a ball activated tool or float valve. Application: Formation pressure while drilling applicaiton when mud motor is used, through placement of iCWD below FPWD and above motor, allowing ciruclation while bypassing motor preventing motor from spining and save the FPWD probe from vibration and unsetting. HPHT Fingerprint before drilling out shoe track where iCWD can be placed above motor and below LWD. Multiple tools Mutiple iCWD can be placed in same drilling string, each activated independently, with No restriction on placement location of each iCWD tool. Placement Slim hole drilling below large casing: Annular velocity inside casing is limited by the flow rate within slim BHA. In some cases, the slim LWD/MWD limits the flow rate and result in either drilling slowly or risking stuck pipe. to improve anular velocity When a tool is placed below BHA and there is risk of losses, another tool will be required above BHA. Each iCWD tool can be activated independent o fthe other tool iCWD can be installed anwhere in the drilling string. More than one tool can be placed spaced apart or stacked within the drilling string with no placement restrictions. improved hole cleaning for extended reach wells where iCWD tools can be spaced apart. The one near well heel is activated to HC mode, then when pulled to vertical, the next deeper tool is activated to HC mode until vertical
Outside Diameter Large size tool: Model 825 (8.25" OD) Slim tool: OD 5" Standard tool: Model 700. OD 7" for drilling 8.5" section
Bore Allows for fishing radioactive source or running free point tool through the iCWD Large open bore for fishing or ball activated tool below. Uninterrupted tool bore enables user to run ball activated tool below iCWD such as coring or under reamer.
Activation system Agile Activation Downlink activation Flow rate No Drop Ball No Drop Dart No Drop Token No need to break conneciton No need to drop slips RPM or Pressure in case can not rotate or circulate
Activation time 5 minutes 10 min using flow downlink 10 min using pressure downlink Go to bypass Quick command without need to break connection or drop slips Same time irrespective of depth or well deviation Significantly cuts on activation time compared to any other technology using RPM downlink
Number of cycles 18 activation or more per run Practically as many as required for the job
Modes of operation All fluid pumped from surface are directed to side port. Application Application: Bypass mode: Drilling Dual Flow (Hole Cleaning) mode: Fluid pumped from surface is split into two passage, a portion is circulated though BHA below iCWD and another portion is circulated through side port. Flow split is based on BHA configuration. Split % can be calculated for each run based on BHA hydraulic Home (Default Drilling) mode: Improve annular velocity, Improve hole cleaning, In this mode, the iCWD valve is operated such that it isolate the inner fluid passage above iCWD to surface from downhole condition. This mode could be beneficial. Isolation Mode: Placement of LCM, Cement, or any other chemical Running inhole with dry pipe Special application particularly for slim holes where BHA flow limitation affect hole cleaning particulalry in the larger casing side above the slim section. Adding iCWD above BHA can increase total flow rate through providing additional passage for addit Well control, Wellhead Jetting autofill. improved circulation after coring in this mode, the iCWD valve is positioned such that side port is closed, while 100% of fluid pumped from surface goes down through iCWD to the string below. In otherwords, the tool a is as a pup joint.
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