Method of killing a well using a completion and kill valve

Claim 2

A process for killing a single production zone well having a set well casing and a production tubing inner bore filled with lighter density fluids at formation pressure by displacing the lighter density fluids from the production tubing inner bore with a heavy fluid through a pressure responsive lockable open sleeve valve located in the production tubing above a packer comprising: a. lowering a plug down the inner bore of the production string; b. seating the plug in the sleeve valve; c. increasing the pressure of the fluid in the production tubing inner bore above the plug for opening and locking open the valve; d. injecting heavy fluid into the well casing above the packer; e. removing the displaced lighter density fluids from the production tubing inner bore above the sleeve valve; and f. substantially filling the inner bore of the production tubing with the heavier fluid wherein the well is killed.

Claim 3

A process for killing two production zones of a well having a set well casing and an upper zone and a lower zone production tubing having inner bores therein filled with lighter density fluids at formation pressure by displacing the lighter density fluids from the production tubing inner bores with a heavy fluid through a pressure responsive sleeve valve located in the lower zone production tubing above a packer separating the upper and lower zones comprising: a. lowering a plug down the inner bore of the lower zone production string; b. seating the plug in the sleeve valve; c. injecting a heavy fluid into the inner bore of the lower zone production tubing above the plug; d. increasing the pressure of the fluid in the lower zone production tubing inner bore above the plug for opening the sleeve valve; e. removing the displaced lighter fluid from the well through the upper zone production tubing inner bore; and f. substantially filling the upper zone production tubing inner bore with heavy fluid from the lower zone production tubing inner bore.

Claim 4

A process for killing two production zones of a well having a set well casing and an upper zone and a lower zone production tubing having inner bores therein filled with lighter density fluids at formation pressure by displacing the lighter density fluids from the production tubing inner bores with a heavy fluid through a pressure responsive sleeve valve located in the lower zone production tubing above a packer separating the upper and lower zones comprising: a. lowering a plug down the inner bore of the lower zone production string; b. seating the plug in the sleeve valve; c. injecting a heavy fluid into the inner bore of the lower zone production tubing above the plug; d. increasing the pressure of the fluid in the lower zone production tubing inner bore above the plug for opening the sleeve valve; e. removing the displaced lighter fluid from the well through the upper zone production tubing inner bore; and f. substantially filling the upper zone production tubing inner bore with heavy fluid from the lower zone production tubing inner bore.

Claim 5

A process for killing two production zones of a well having a set well casing and an upper zone and a lower zone production tubing having inner bores therein filled with lighter density fluids at formation pressure by displacing the lighter density fluids from the production tubing inner bores with heavy fluid through a pressure responsive lockable open sleeve valve located in the lower zone production tubing above a packer separating the upper and lower zones comprising: a. lowering a plug down the inner bore of the lower zone production string; b. seating the plug in the sleeve valve; c. increasing the pressure of the fluid in the production tubing inner bore above the plug for opening and locking open the valve; d. injecting heavy fluid into the inner bore of the upper zone production tubing; e. removing the displaced lighter density fluids from the lower zone production tubing inner bore above the sleeve valve; f. substantially filling the upper zone production tubing inner bore with heavy drilling fluid; g. substantially filling the lower zone production tubing inner bore with heavy drilling fluid from the upper zone production tubing inner bore communicated through the locked open sleeve valve wherein the well is killed.

Claim 6

A process for killing two production zones of a well having a set well casing and an upper zone and a lower zone production tubing having inner bores therein filled with lighter density fluids at formation pressure by displacing the lighter density fluids from the production tubing inner bores with heavy fluid through a pressure responsive lockable open sleeve valve located in the lower zone production tubing above a packer separating the upper and lower zones comprising: a. lowering a plug down the inner bore of the lower zone production string; b. seating the plug in the sleeve valve; c. increasing the pressure of the fluid in the production tubing inner bore above the plug for opening and locking open the valve; d. injecting heavy fluid into the inner bore of the upper zone production tubing; e. removing the displaced lighter density fluids from the lower zone production tubing inner bore above the sleeve valve; f. substantially filling the upper zone production tubing inner bore with heavy drilling fluid; g. substantially filling the lower zone production tubing inner bore with heavy drilling fluid from the upper zone production tubing inner bore communicated through the locked open sleeve valve wherein the well is killed.

Claim 7

A process of killing a well having a production tubing by displacing a lighter fluid within the bore of the production tubing with a heavy fluid using a valve connected in the production tubing and operably responsive to the application of a controlled fluid pressure for providing a circulation channel communicating the bore of the production tubing with the area adjacent the exterior of the valve, including the steps of: a. positioning a plug in the bore of the production tubing to control the application of fluid pressure to the valve; b. controlling the fluid pressure in the well applied to the valve to establish a circulation channel for communicating through the production tubing; and c. injecting heavy fluids into the bore of the production tubing for displacing the lighter fluids with the heavy fluids wherein the well is killed.

Claim 8

A process of killing a well having a production tubing by displacing a lighter fluid within the bore of the production tubing with a heavy fluid using a valve connected in the production tubing and operably responsive to the application of a controlled fluid pressure for providing a circulation channel communicating the bore of the production tubing with the area adjacent the exterior of the valve, including the steps of: a. positioning a plug in the bore of the production tubing to control the application of fluid pressure to the valve; b. controlling the fluid pressure in the well applied to the valve to establish a circulation channel for communicating through the production tubing; and c. injecting heavy fluids into the bore of the production tubing for displacing the lighter fluids with the heavy fluids wherein the well is killed.

Claim 9

The method as set forth in claim 4, including The step of: removing the displaced lighter fluids from the bore of the production tubing through the circulation channel of the valve to kill the well.

Claim 10

The method as set forth in claim 4, including the step of: filling the bore of the production tubing with sufficient heavy fluids to kill the well.

Claim 11

The method as set forth in claim 4, including the step of: locking the valve in the open condition for providing the circulation channel to enable communication between the bore of the production tubing and the area adjacent the exterior of the valve when the controlled application of fuid pressure to the valve is removed.

Claim 12

The method as set forth in claim 7, including the step of: injecting the heavy fluids into the bore of the production tubing through the circulation channel wherein the well is killed.

Claim 13

The method as set forth in claim 8, including the step of: flowing the heavy fluids to a location in the well adjacent the circulation channel for injecting into the bore of the production tubing through the circulation channel.

Claim 14

The method as set forth in claim 8, including the step of: flowing the heavy fluids through the bore of a second production tubing positioned in the well to a location in the well adjacent the circulation channel for injection into the bore of the first mentioned production tubing through the circulation channel wherein the first mentioned production tubing well and the second production tubing well are killed.

Claim 15

A process for killing a well having a production tubing with an bore filled with lighter density fluid by displacing the lighter density fluids from the bore of the production tubing with heavy fluids by using a pressure responsive lockable open valve located in the production tubing and responsive to an application of a controlled fluid pressure for providing a circulation channel through the production tubing, comprising the steps of: lowering a plug down the bore of the production string for seating to control application of fluid pressure to a desired portion of the valve; increasing the pressure of the fluid in the bore of the production tubing for controlled application to the valve for opening the valve to form the circulation channel and locking open the valve; and, filling the bore of the production tubing with sufficient heavier fluids wherein the well is killed.

Claim 16

A process for killing a well having a production tubing with an bore filled with lighter density fluid by displacing the lighter density fluids from the bore of the production tubing with heavy fluids by using a pressure responsive lockable open valve located in the production tubing and responsive to an application of a controlled fluid pressure for providing a circulation channel through the production tubing, comprising the steps of: lowering a plug down the bore of the production string for seating to control application of fluid pressure to a desired portion of the valve; increasing the pressure of the fluid in the bore of the production tubing for controlled application to the valve for opening the valve to form the circulation channel and locking open the valve; and, filling the bore of the production tubing with sufficient heavier fluids wherein the well is killed.

Claim 17

The method as set forth in claim 11, including the step of: injecting the heavy fluids in the bore of the production tubing through the circulation channel for substantially filling the bore of the production tubing.

Claim 18

The method as set forth in claim 12, including the step of: removing the lighter density fluids displaced by injecting the heavy fluids from the bore of the production tubing at a location above the circulation channel.

Claim 19

The method as set forth in claim 11, including the steps of: injecting the heavy fluids in the bore of the production tubing at a location spaced from the circulation channel; and, removing the lighter density fluids displaced by injecting the heavy fluids from the bore of the production tubing through the circulation channel.

Claim 20

The method as set forth in claim 12, including the step of: flowing the heavy fluids through a well casing to a location adjacent the circulation channel for injection into the bore of the production tubing through the circulation channel.

Claim 21

The method as set forth in claim 12, including the step of: flowing the heavy fluids through the bore of a second production tubing to a location adjacent the circulation channel for injection into the bore of the first mentioned production tubing through the circulation channel wherein the first mentioned production tubing well and the second production tubing well are killed.