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US 6,684,950 B2Granted
System for pressure testing tubing
AssigneeSchlumberger Technology Corporation
InventorDinesh R. Patel
Life of this patent
Estimating the term…
Abstract
A system and method is provided for pressure testing a tubing string. A valve is utilized within the tubing string to enable selective application of pressure in the tubing above the valve. However, between pressure tests, the valve may be opened to allow fluid flow into the tubing. Thus, the tubing string may readily be moved, for example, downhole into a wellbore with periodic application of pressure to test the tubing.
Claims39
A system, to pressure test a tubing in a well, comprising:
- a housing coupled to the tubing;
- a flapper valve in the housing moveable between an opened position and a closed position, the flapper valve biased to the closed position in which the flapper valve seals pressure from above, and wherein the flapper valve is free to move from the closed position by flow applied from the bottom of the flapper valve to allow the flow of fluid into the tubing;
- a mandrel moveably attached to the housing, the mandrel selectively moveable to open the flapper valve;
- and
- a retainer in the housing selectively moveable to maintain the flapper valve in the open position.
2 more elements
A completion assembly used in a well comprising:
- a tubing having a passageway;
- a packer mounted to the tubing;
- a housing coupled to the tubing;
- a flapper valve in the housing moveable between an opened position and a closed position, the flapper valve biased to the closed position in which the flapper valve prevents flow through the passageway from above, and wherein the flapper valve is free to move from the closed position by flow from beneath the flapper valve to allow flow of fluid into the tubing;
- a mandrel moveably attached to the housing, the mandrel selectively moveable to open the flapper valve;
- a retainer in the housing selectively moveable to maintain the flapper valve in the open position;
- and
- a hydraulic control line through which different pressures are applied to independently move the mandrel and set the packer.
5 more elements
A completion assembly used in a well comprising:
- a tubing having a passageway;
- a housing coupled to the tubing;
- a flapper valve in the housing moveable between an opened position and a closed position, the flapper valve biased to the closed position in which the flapper valve prevents flow through the passageway from above, and wherein the flapper valve is free to move from the closed position by flow from beneath the flapper valve to allow flow of fluid into the tubing;
- a valve mandrel moveably attached to the housing, the valve mandrel selectively moveable to open the flapper valve;
- a retainer in the housing selectively moveable to maintain the flapper valve in the open position;
- an indexer coupled to the tubing;
- and
- a first conduit to allow fluid communication between the passageway and the indexer.
5 more elements
A completion assembly used in a well comprising:
- a tubing having a passageway;
- a housing coupled to the tubing;
- a flapper valve in the housing moveable between an opened position and a closed position, the flapper valve biased to the closed position in which the flapper valve prevents flow through the passageway from above, and wherein the flapper valve is free to move from the closed position by flow from beneath the flapper valve to allow flow of fluid into the tubing;
- a valve mandrel moveably attached to the housing, the valve mandrel selectively moveable to open the flapper valve;
- a retainer in the housing selectively moveable to maintain the flapper valve in the open position;
- an indexer coupled to the tubing;
- a first conduit to allow fluid communication between the passageway and the indexer;
- and
- a link rod coupled between the valve mandrel and a latch.
6 more elements
A system to pressure test in a well, comprising:
- a tubing having a passageway;
- a housing coupled to the tubing;
- a mandrel moveably attached to the housing, wherein the mandrel comprises a power mandrel and a ball operator mandrel;
- a ball valve to allow or block flow through the tubing, wherein the mandrel is selectively moved to open the ball valve between each pressure test;
- and
- a circulating valve in the tubing.
3 more elements
A system to pressure test in a well, comprising:
- a tubing having a passageway;
- a housing coupled to the tubing;
- a mandrel moveably attached to the housing;
- a disk valve that may be pierced by the mandrel to allow flow through the tubing, wherein the mandrel can be selectively moved to pierce the disk valve;
- and
- a circulating valve in the tubing.
3 more elements
Dependencies are inferred from the claim text.