IFPT Formation Pressure Tester While Drilling

IFPT can be connected with DRILOG system, and provides real-time formation pressure and mobility data. IFPT is one of the most important testing methods for LWD, and is able to obtain the formation pressure at the time of opening up the formation, which is characterized in that it could measure the formation pressure by utilizing the temporary interruption during the drilling, with the feature of short testing time, and could solve the problem that it is hard to run down the wire-line logging instrument when testing the highly-deviated well, horizontal well and extended reach wells. Compared with conventional technology, the pressure data from the formation testing and measurement while drilling could better reflect the actual pressure of the formation, and optimize the drilling technology and improve the drilling efficiency. Its main use includes the real-time adjustment of annulus pressure, the adjustment of mud density in a timely manner, optimization of completion scheme, the improvement of cementing quality, the calculation of geological reservoir, the judgment of formation fluids interface, optimization of well structure and well site selection.

Operation requirements

In terms of fixed-point test, conduct the friction test of the drill tool before the pressure test; the probe shall be adjusted to its high-side position during the inclined shaft operation, and the drill tool is static completely during the pressure test, while the mud pump maintains in the state of circulating, and upload the state of the instrument in real time; upload the testing results after the operation, and then move the drilling tools after the completion of the upload.

Safe, efficient and smart structure design

The setting probe mechanism that IFPT has proprietary technology, could control the thrusting force smartly to adapt to setting requirements for the formation with different hardness, and could prolong the service life of the probe at the same time; adopt the automatic recovery technology of the energy accumulator and probe structural weakness design, reduce the risks of jamming of the drilling tool resulting from the irrecoverable probe by dual means.

Testing system for the self-adaption of formation physical property

The reservoir with known physical property, is designed with conventional pressure test mode, and could configure the operating system according to the permeability of the formation; the reservoir with unknown physical property, is designed with smart pressure test mode, one pretest shall be made before formal pressure test, and then estimate the formation permeability according to the pretest results, thus determining the testing parameter of the formal pressure test.

High-precision testing process control

Adopt high-precision quartz pressure sensor with short temperature equilibrium process and fast pressure response speed to test the formation pressure; the pressure test system adopts precision servo motor and high-precision lead screw transmission mechanism so as to control the drawdown volume and drawdown speed precisely. (with the control accuracy for the drawdown volume of 0.1cc, and that for drawdown speed of 0.1cc/s).

Obtain the formation pressure and fluidity in real time

Estimate the mobility of the pressure test point in real time, and upload the formation pressure, temperature, mobility and other information of the measuring points at the first time after the testing so as to provide data support for reservoir analysis, the optimization of the drilling process, the improvement of the drilling efficiency.


Directional Drilling
Optimize the drilling parameters
Real-time formation evaluation

Borehole diameter range: 8.5~10.5″
Total length:29.5 ft
Gross weight:2082 lb
Max. temperature:150 ℃
Max. pressure:20000 psi
Preset chamber volume:30 cc
Pretest velocity:0.1~2 cc/S
Formation pressure test range:0~16000 psi
Formation pressure test accuracy:±0.02% FS
Formation temperature accuracy:0.5 ℃
Battery capacity:24 Ah
Times of pressure test:80

Max. OD:8.15″
Min. diameter of inner flow passage: 1.89″
Type of instrument connection buckle: Upper part: 5-1/2″API FH. Box
                                                              Lower part: 5 1/2″ API FH.Pin
Max. curvature of instrument during rotation:8°/100 ft
Max. curvature of instrument during sliding:16°/100 ft
Max. axial bit pressure:570,000 lbf
Min. yield torque:52,000 ft.lbf
Min. operating torque:22,000 ft.lbf
Max. operational tensile load:130,000 lbf
Max. vibration load:330,000 lbf
Transverse mechanical impact:500 grms
Axial mechanical impact:20 g@5Hz~1 kHz
Max. working displacement:650 gpm