Xciter Extended Reach Vibration Tool
Logan's proprietary Xciter Extended Reach Vibration Tool enhances horizontal drilling effectiveness by introducing a variable frequency into the drill string that is designed to mitigate the effects of wellbore friction. The Xciter tool has proven to be especially effective in the drilling of horizontal wells in unconventional oil and gas plays in North America.
Since the fall of 2004, Logan Xtend has participated in over 5,000 successful drilling projects in Canada, United States and the Caribbean.
- Connections are compatible with all standard drill pipe
- Compatible with EM, MWD and LWD equipment
- Operates with conventional fluid or two-phase flow
The Xciter is a robust, user-friendly tool that is added to the bottom hole assembly (BHA) to enhance slide and rotary drilling performance under the the most challenging of wellbore conditions.
The Xciter uses PDM power to rotate multiple-size masses to excite the drill string. Exciting the drill string assists in breaking static friction associated with slide drilling. Stick/slip is reduced and/or eliminated, rate of penetration (ROP) is increased, tool face control is enhanced, and drill bit life is improved.
Xciter Operating Principle
A complex variable frequency excites the drill string to break static friction in the build and horizontal sections of the well. Amplitude and frequency control are achieved by changing flow configuration within the tool. Torque and drag analysis determines optimum placement of the Xciter tool in the drill string.
Xciter Tool Models
Xciter Model Number
Flow Rate (lpm)
Pressure Drop (kpa)
Maximum Operating Temperature (deg C)
Maximum Over-Pull (kg)
Amplitude (g's) (peak-to-peak)
380 – 1750
500 – 860
800 – 1200
608 – 860
1135 – 2270
600 – 970
*High Temperature Configuration is Available
Top & Bottom Sub OD (mm)
Top & Bottom Sub ID (mm)
Tool Length — no crossover subs (m)
Tool Weight — no crossover subs (kg)
Make-up Torque (ft/lbs)
4" FH & 3-1/2" IF
133.3 & 122
4" FH & 3-1/2" IF
133.3 & 122
The following case studies demonstrate the positive effects the Xciter tool has in various formations and drilling applications.
All case studies are in pdf format.
25 horizontal wells drilled in the Powder River Basin by one operator on 3 different rigs. Study of ROP in curve and lateral hole sections of both Parkman and Turner formation wells. Data from BHA reports using the Logan Xciter.
The well being examined is comprised of a typical vertical and build section (0 – 90 degrees inclination) and four (4) horizontal legs drilled to various depths. Data was acquired by Chimo Drillsight electronic data collection system.
The wells being examined are typical directional wellbores with kick-off at 120 meters (avg) and build to 63 degrees (avg) and hold. Both wells were drilled by the same rig. Data was acquired by Pason Systems electronic data collection system.
Offset wells (1 thru 4) kick-off at 1125 m (avg) and build to 88.5 degrees (avg) deviation with minimum change in azimuth. The Xciter well (#5) is unique in that the deviation is built to 88.7 degrees with an azimuth change of 110 degrees. Five wells were drilled with roller cone bits by the same rig. Data was acquired by Pason Systemselectronic data collection system.
Results from five wells with Xciter and five wells without Xciter drilled in Jean Marie Formation at Fort Nelson, British Columbia. All wells are horizontal underbalanced gas wells drilled with two-phase flow. Data was acquired byPason Systems electronic data collection system.