초록 ▼

A device for vibrating tubing as it is inserted into a wellbore is disclosed. The device has a fluidic switch that has no moving parts. The fluidic switch is connected to a piston that oscillates back and forth in a cylinder. The piston is the only moving part. As the piston oscillates, it blocks an

A device for vibrating tubing as it is inserted into a wellbore is disclosed. The device has a fluidic switch that has no moving parts. The fluidic switch is connected to a piston that oscillates back and forth in a cylinder. The piston is the only moving part. As the piston oscillates, it blocks and unblocks openings in the cylinder or other components. The movement of the piston controls the timing of the oscillation, and also generates an impulse or vibration. The vibration may reduce the friction between the tubing and the wellbore.

대표청구항 ▼

1. A vibratory impulse generator assembly comprising: a source of fluid flow that provides fluid to a first input;a housing;a fluidic switch within the housing having a first power path and a second power path, wherein the first input provides fluid to the first power path and the second power path;

1. A vibratory impulse generator assembly comprising: a source of fluid flow that provides fluid to a first input;a housing;a fluidic switch within the housing having a first power path and a second power path, wherein the first input provides fluid to the first power path and the second power path;a piston inline with the fluidic switch within the housing in communication with the fluidic switch and positioned within a cylinder within the housing, wherein the piston is hollow, having a main piston passage that receives fluid from a fluid passage; andan interruption valve positioned inline with the fluid passage, the piston being configured to actuate the interruption valve, the interruption valve positioned inline with the piston and at least a portion of the interruption valve within the housing,wherein the first power path is connected to a first side of the cylinder and the second power path is connected to a second side of the cylinder, and wherein the source of fluid also provides fluid to the fluid passage. 2. The vibratory impulse generator assembly of claim 1, further comprising a cap connected to the fluidic switch, the cap being configured to be connected to a length of tubing, the cap positioned inline with the fluidic switch and at least a portion of the cap within the housing. 3. The vibratory impulse generator assembly of claim 2, wherein the cap is connected near an end of the length of tubing, the tubing being inserted into a wellbore. 4. The vibratory impulse generator assembly of claim 3, wherein vibratory impulse generator is configured to vibrate the end of the length of tubing. 5. The vibratory impulse generator assembly of claim 1, wherein the interruption valve is configured to substantially stop fluid from moving through the fluid passage when actuated by the piston. 6. The vibratory impulse generator assembly of claim 1, wherein the vibratory impulse generator assembly is configured to generate a periodic impulse. 7. The vibratory impulse generator assembly of claim 1, further comprising an accumulator connected to the vibratory impulse generator assembly inline with the fluid passage and the interruption valve. 8. The vibratory impulse generator assembly of claim 1, further comprising a plug connected to the vibratory impulse generator assembly inline with the fluid passage and the interruption valve. 9. The vibratory impulse generator assembly of claim 8, wherein the plug comprises a pressure adjustment passage. 10. The vibratory impulse generator assembly of claim 8 further comprising an accumulator connected to the vibratory impulse generator assembly. 11. The vibratory impulse generator assembly of claim 10, the accumulator comprising: an accumulator body having a main passage and an annulus, the annulus between the main passage and an exterior of the accumulator body;a spring positioned in the annulus;a vent passage in communication with the annulus; anda piston connected to an end of the spring. 12. The vibratory impulse generator assembly of claim 1, wherein the piston comprises a piston trigger port defined therein that directs fluid from the main piston passage to a first trigger path of the fluidic switch when the piston is in a first position and to a second trigger path of the fluidic switch when the piston is in a second position. 13. The vibratory impulse generator assembly of claim 1, further comprising a bulkhead including a fist bulkhead power path and a second bulkhead power path, wherein the first power path of the fluidic switch is connected to the first side of the cylinder via the first bulkhead power path, and wherein the second power path of the fluidic switch is connected to the second side of the cylinder via the second bulkhead power path and via a chamber defined between the housing and the bulkhead. 14. A fluidic switch comprising: a top piece comprising: a power input path;a connecting power path connected to the power input path;a first power path connected to the connecting power path;a second power path connected to the connecting power path;a first vent positioned between the connecting power path and the first power path;a second vent positioned between the connecting power path and the second power path;a first trigger path connected to the connecting power path;a second trigger path connected to the connecting power path;a first feedback path connected to the connecting power path, the first feedback path being separate from the first trigger path and the second trigger path, the first feedback path positioned between the first trigger path and the power input path; anda second feedback path connected to the connecting power path, the second feedback path being separate from the first trigger path and the second trigger path, the second feedback path positioned between the second trigger path and the power input path; anda bottom piece comprising: a first feedback channel connected to the first power path and to the first feedback path; anda second feedback channel connected to the second power path and to the second feedback path. 15. The fluidic switch of claim 14, wherein the fluidic switch is in fluid communication with an oscillatory device. 16. The fluidic switch of claim 15, wherein the oscillatory device is configured to interrupt a fluid flow to thereby generate an impulse. 17. The fluidic switch of claim 16, wherein the impulse vibrates a tubing connected to the fluid switch, the tubing being positioned within a wellbore. 18. The fluidic switch of claim 14, wherein the first and second vents may be vented into a wellbore.