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US 2012/0222862 A1Published application
Well plug and abandonment choke insert
AssigneeConocoPhillips Company
InventorThomas Eugene FERG
Life of this patent
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AssigneeConocoPhillips Company
InventorThomas Eugene FERG
Estimating the term…
A process for plugging a wellbore comprises installing a choke device (1) into the wellbore to increase the back pressure allowing better control when introducing cement to plug the wellbore. The device (1) has a cylindrical shape with a central through bore (6). On the external profile is a shoulder (4) which, when the device is installed in a wellbore, comes to rest against a nipple in the wellbore. The device (1) may free fall for all or part of the way down but would normally be pumped down at least for the last part of its delivery. In the bore (6) is a pump out ball (10) which blocks the through bore until the device reaches the nipple and stops, at which point pressure increases and the ball is ejected. Cement and other liquid may then be pumped through the choke device to the distal region of the well.
A process for plugging a wellbore, wherein the process comprises the steps of:
A choke device for use in a process for plugging a wellbore, wherein the device comprises a body capable of being passed down a wellbore, wherein the body has:
A method of preparing a wellbore to be plugged comprising inserting into the well a choke device, wherein the device comprises a body capable of being passed down a wellbore, wherein the body has:
A plugged wellbore having located therein a choke device, wherein the device comprises a body capable of being passed down a wellbore, wherein the body has:
Dependencies are inferred from the claim text.