Abstract A method for inserting soft flexible pipe or hose into oil and gas wells or the like under pressure. A capstan type drive mechanism is provided in combination with a pair of stuffing boxes and a reel for guiding a soft flexible pipe or hose into the well. The capstan pulls the pipe or hose from a storage reel into a sealed pressure chamber of the capstan drive mechanism and delivers it through a wiper type stuffing box into the well bore. Fluids are preferably forced through the flexible pipe as the same is moved into the well bore and directed outwardly into the well bore through a jet nozzle which serves to pull the lower end of the pipe into the well and to maintain the pipe under tension as it is injected. The capstan drive provides for positive movement of the pipe without damaging the same, while the pipe is filled with liquid to prevent its collapsing as it is moved through the capstan drive into the well. Special couplings are provided between lengths of the soft flexible pipe or hose which will pass through the stuffing boxes, capstan drive and into the well without difficulty. The capstan drive is enclosed in a toroid pressure chamber into which the soft flexible hose or pipe is moved in a tangential direction into the toroid chamber onto the capstan drive in a tangentiala direction from the capstan drive out of the torroid chamber into the well.
A METHOD OF INJECTING SOFT FLEXIBLE CONDUIT INTO A WELL AGAINST THE WELL PRESSURE CONFINED IN THE WELL INCLUDING: FORMING A CLOSED CHAMBER COMMUNICATING AT ONE END WITH THE BORE OF THE WELL IN FLUID PRESSURE COMMUNICTION THEREWITH; CLOSING THE OTHER END OF THE CHAMBER AROUND A STRING OF SOFT FLEXIBLE CONDUIT TO BE INSTALLED IN THE WELL FILLING THE CONDUIT WITH FLUID; DRAWING THE SOFT FLEXIBLE CONDUIT WITH THE FLUID THEREIN THROUGH THE SEAL INTO THE CHAMBER BY FORCE APPLIED TO THE CONDUIT IN THE CHAMBER BETWEEN THE SEAL AND THE WELL BORE;
Claim 2
Independent Claim
94 words
A METHOD OF INJECTING SOFT FLEXIBLE CONDUIT INTO A WELL AGAINST THE WELL PRESSURE CONFINED IN THE WELL INCLUDING: FORMING A CLOSED CHAMBER COMMUNICATING AT ONE END WITH THE BORE OF THE WELL IN FLUID PRESSURE COMMUNICTION THEREWITH; CLOSING THE OTHER END OF THE CHAMBER AROUND A STRING OF SOFT FLEXIBLE CONDUIT TO BE INSTALLED IN THE WELL FILLING THE CONDUIT WITH FLUID; DRAWING THE SOFT FLEXIBLE CONDUIT WITH THE FLUID THEREIN THROUGH THE SEAL INTO THE CHAMBER BY FORCE APPLIED TO THE CONDUIT IN THE CHAMBER BETWEEN THE SEAL AND THE WELL BORE;
Claim 3
Independent Claim
108 words
A method of injecting soft flexible conduit into a well against the well pressure confined in the well including: forming a closed chamber communicating at one end with the bore of the well in fluid pressure communication therewith; sealing around the string of soft flexible conduit to be installed in the well at the closed end of the chamber; drawing the soft flexible conduit through the seal into the chamber; directing the soft flexible conduit from the chamber into the bore of the well; circulating fluids through said flexible conduit into the well casing; and utilizing said circulating fluid to draw said flexible conduit downwardly in said well.
Claim 4
Independent Claim
108 words
A method of injecting soft flexible conduit into a well against the well pressure confined in the well including: forming a closed chamber communicating at one end with the bore of the well in fluid pressure communication therewith; sealing around the string of soft flexible conduit to be installed in the well at the closed end of the chamber; drawing the soft flexible conduit through the seal into the chamber; directing the soft flexible conduit from the chamber into the bore of the well; circulating fluids through said flexible conduit into the well casing; and utilizing said circulating fluid to draw said flexible conduit downwardly in said well.
Claim 5
Dependent Claim
62 words
A method of the character set forth in claim 2 including: the additional step of stopping circulating of said fluids into said well to draw said flexible conduit into the well and directing a jet of circulating fluids forwardly from the end of said conduit to remove bridges or obstructions in the well preventing entry of the conduit into the well therepast.
Claim 6
Dependent Claim
52 words
A method of the character set forth in claim 3 including: the additional steps of stopping flow of the jet of fluids forwardly of the conduit and again direction the circulation of fluids rearwardly from the end of said flexible conduit to draw the end of said conduit further into the well.