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Method and Apparatus for Continuously Controlling A Well Flow Rate
| Content Provider | The Lens |
|---|---|
| Abstract | A method for continuously controlling fluid flow rates through a well (4) provides to shut off the drilling mud at the well inlet and outlet and detect measurements of flow rate and density of said drilling mud by a Venturi measuring device (10,2). |
| Related Links | https://www.lens.org/lens/patent/014-835-878-827-510/frontpage |
| Language | English |
| Publisher Date | 2017-09-14 |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Patent |
| Jurisdiction | United States of America |
| Date Applied | 2014-10-07 |
| Applicant | Well Equipments Int S R L |
| Application No. | 201415520396 |
| Claim | A method for continuously controlling a fluid flow rate through a well, characterized in that said method comprises shutting off a drilling mud at an inlet and an outlet of the well and detecting flow rate and density measurements by a Venturi measuring device. The method, according to claim 1 , further comprising the step of using said flow-rate and density measurements for adjusting a choke valve arranged in a mud circulating circuit to provide a desired pressure gradient through said well during a drilling operation including disconnecting drill pipe and connecting additional drill pipes to a string of drill pipes in the wel An apparatus for continuously controlling a fluid flow rate through a well comprising a first Venturi measuring device, at the inlet of the well, and a second Venturi measuring device, at the outlet of the well, the second Venturi device detects a flow-rate difference with respect to the first Venturi measuring device and, wherein the flow-rate is adjusted by a choke valve arranged downstream of said well based on the flow-rate difference. The apparatus, according to claim 3 , further comprising a series arranged density measuring device, cooperating with the second flow-rate measuring device and said choke valve. The apparatus, according to claim 4 , further comprising a switching device to be arranged in a drilling battery thereby allowing the drilling mud to be continuously circulated even during a drilling rod exchanging operation. The apparatus, according to claim 5 , wherein the switching device has an outer size similar to the drilling rod, thereby allowing any special equipment to pass through its inside. The apparatus, according to claim 5 , wherein the switching device comprises an axial valve and a radial valve, allowing said fluid to pass through in two directions. The apparatus of claim 3 further comprising a first skid assembly including the first Venturi measuring device, and a hydraulic circuit for switching the mud flow-rate in both a radial and an axial direction of said switching device, said first skid assembly comprising a hydraulic circuit with male valves. The apparatus of claim 8 further comprising a second skid assembly including the second Venturi measuring device, the density measuring device, the choke valve and an electronic central processing unit, said electronic central processing unit processing data with reference parameters and adjusting a choke valve inlet port. The apparatus of claim 8 further comprising a first switching manifold, associated with said first skid, and a second switching manifold, associated with a second skid, said first and second manifolds being arranged upstream and downstream of said respective skids; each said switching manifolds comprising three valves thereby allowing an original hydraulic circuit to be recovered while insulating the control circuits. The apparatus of claim 8 wherein the hydraulic circuit of said first skid is adapted to control the flow direction without hammering phenomena. The apparatus of claim 7 wherein said axial and radial valves of said switching device are withdrawable valves; said axial valve being pressed on inner walls of a valve body by a passing through mud during a conventional mud circulating step and being displaced to a closing position as the mud flow passes through the radial valve; said radial valve, being held at a target position by a holding spring, providing a hydraulic sealing in an outward radial direction and being adapted to be opened only as an outer pressure is larger than an inner pressure, increased by a urging spring force. The apparatus of claim 7 wherein the switching device comprises a backup valve preventing said drilling mud from entering said rod; said backup valve being mechanically controlled by a hydraulic actuator and said drilling mud flow-rate being provided by said switching device encompassing a body of the valve. The apparatus of claim 13 wherein the backup valve has an actuator comprising an actuating cylinder providing a standard cylinder stroke in an axial direction and at a full closing condition, allow the valve three foot elements to disengage from helical planes. |
| CPC Classification | Earth Or Rock Drilling;Obtaining Oil; Gas; Water; Soluble Or Meltable Materials Or A Slurry Of Minerals From Wells |
| Extended Family | 067-035-564-580-348 147-214-310-869-014 060-987-400-064-893 166-469-665-621-169 014-835-878-827-510 006-733-922-944-371 000-258-551-357-857 011-139-940-772-891 |
| Patent ID | 20170260821 |
| Inventor/Author | Peveri Luigi |
| IPC | E21B21/08 E21B21/10 E21B34/02 |
| Status | Active |
| Owner | Schlumberger Technology Corporation |
| Simple Family | 067-035-564-580-348 011-139-940-772-891 060-987-400-064-893 166-469-665-621-169 014-835-878-827-510 006-733-922-944-371 000-258-551-357-857 147-214-310-869-014 |
| CPC (with Group) | E21B21/106 E21B47/10 E21B21/08 E21B21/019 E21B21/10 E21B47/07 E21B47/06 |
| Issuing Authority | United States Patent and Trademark Office (USPTO) |
| Kind | Patent Application Publication |
