Back to results
US 5,058,674 AGranted
Wellbore fluid sampler and method
AssigneeHalliburton Company
InventorsRoger L. Schultz, Kevin R. Manke, H. Kent Beck
Life of this patent
Estimating the term…
Abstract
A well fluid sampling apparatus provides a time delay after actuation of the tool and before a sample is taken. The tool is operated by well pressure acting on a piston. The piston is initially hydraulically blocked so that it cannot move. The time delay is provided after the piston begins moving. Additional time delay devices can optionally be included.
Claims42
A fluid sampling apparatus, comprising:
- a body having a first chamber, a second chamber, a third chamber and a sample port defined therein, said sample port being communicated with an outside zone outside of said body;
- impedance means, disposed in said body between said second and third chambers, for impeding fluid flow from said second chamber to said third chamber;
- sample valve means, disposed in said body between said sample port and said first chamber, for being moved relative to said body in response to outside pressure from said outside zone acting on said sample valve means, and for communicating said sample port with said first chamber only after a predetermined first time delay after said outside pressure begins moving said sample valve means;
- and
- selective blocking means, disposed in said body between said second and third chambers, for initially isolating said second chamber from said third chamber to hydraulically block said sample valve means against movement in response to said outside pressure.
2 more elements
A fluid sampling apparatus, comprising:
- a housing having a first chamber, a second chamber, and a third chamber defined therein and having a sample port defined therein, said sample port being communicated with an outside zone outside of said housing;
- valve means, disposed in said housing between said sample port and said first chamber for isolating said sample port from said first chamber when said valve means is in a first position and for communicating said sample port with said first chamber when said valve means is in a second position;
- impedance means, disposed in said housing between said second and third chambers, for impeding fluid flow from said second chamber to said third chamber and for providing a time delay in communicating said sample port with said first chamber after a pressure differential between said outside zone and said second chamber begins moving said actuating means;
- and
- selective closure means, disposed in said housing between said second and third chambers, for initially isolating said second chamber from said third chamber to prevent said actuating means from moving said valve means to its said second position, and for subsequently communicating said second and third chambers to permit said actuating means to move said valve means to its said second position.
2 more elements
A method of sampling a well, comprising:
- (a) running a fluid sampling tool into said well to a depth at which said well is to be sampled, said fluid sampling tool including:
- a housing having a first chamber, a second chamber, and a third chamber defined therein and having a sample port defined therein, said sample port being communicated with said well outside said housing;
- a sample valve disposed in said housing between said sample port and said first chamber;
- an actuating piston connected to said sample valve, said actuating piston having a first side communicated with said well and a second side communicated with said second chamber;
- and
- a fluid flow restriction disposed in said housing between said second and third chambers;
- and
- (b) initially preventing said actuating piston from moving said sample valve toward an open position wherein said sample port is communicated with said first chamber by isolating said second chamber from said third chamber and hydraulically blocking said actuating piston.
5 more elements
A downhole tool apparatus, comprising:
- a body having a low pressure chamber defined therein, and having a first port defined therein communicated with an outside zone outside of said body;
- a pressure responsive operating mechanism disposed in said body and having a first side communicated with said outside zone through said first port and a second side communicated with said low pressure chamber;
- and
- disabling means for disabling said apparatus when fluid pressure in said outside zone exceeds a predetermined level.
1 more element
A fluid sampling apparatus, comprising:
- a body having a first chamber, a second chamber, a third chamber, a sample port and a power port defined therein;
- means, disposed in said body between said second and third chambers, for impeding fluid flow from said second chamber to said third chamber;
- and
- valve means, disposed in said body between said sample port and said first chamber for being moved relative to said body in response to pressure acting on said valve means through said power port, for communicating said sample port with said first chamber only after a predetermined time delay after said pressure begins moving said valve means.
1 more element
Dependencies are inferred from the claim text.