Liner hanger system

1. A method comprising:

attaching a screen to a liner hanger;

connecting a setting tool to the liner hanger having the screen attached;

running the setting tool connected to the liner hanger into a wellbore, the setting tool being run in the wellbore to a point proximate to an end of a casing lining the wellbore, the casing comprising a collar located proximate to the end of the casing;

securing the liner hanger to the collar; and

after the securing, releasing the setting tool from the liner hanger,

where releasing comprises applying downward force to the setting tool and, while downward force is applied, rotating the setting tool.

2. The method of claim 1 , where the wellbore is for a vertical water well; and

where the screen lines at least part of a production zone of the vertical water well.

3. The method of claim 1 , where an outer profile of the liner hanger has a first shape that is based on a second shape of an inner profile of the collar.

4. The method of claim 1 , where an outer profile of the liner hanger has a first shape that is complementary to a second shape of an inner profile of the collar.

5. The method of claim 1 , where the setting tool is configured to connect to the liner hanger using a J-slot mechanism; and

where the J-slot mechanism comprises two J-slot structures opposing each other on an inner profile of the liner hanger.

6. A method comprising:

attaching a screen to a liner hanger;

connecting a setting tool to the liner hanger having the screen attached;

running the setting tool connected to the liner hanger into a wellbore, the setting tool being run in the wellbore to a point proximate to an end of a casing lining the wellbore, the casing comprising a collar located proximate to the end of the casing;

securing the liner hanger to the collar; and

after the securing, releasing the setting tool from the liner hanger,

where connecting the setting tool to the liner hanger comprises connecting an anchor located on the setting tool to a J-slot mechanism on an inside of the liner hanger.

7. The method of claim 6 , where releasing the setting tool from the liner hanger comprises applying downward force to the setting tool and rotating the setting tool in order to release the anchor from the J-slot mechanism.

8. A liner hanger system for attaching a screen onto a casing string, the system comprising:

a setting tool;

a setting seat collar disposed on the casing;

a liner hanger disposed below the setting tool and configured to couple thereto, the liner hanger comprising a first set of threads at one end; and

a screen disposed below the liner hanger, the screen comprising a second set of threads configured to connect with the first set of threads, thereby coupling the screen to the liner hanger,

where an interference fit is formed between the liner hanger and the setting seat collar that produces a frictional force between the liner hanger and the setting seat collar.

9. The system of claim 8 , where the setting tool comprises an anchor configured to connect to the liner hanger, the liner hanger further comprising:

an outer profile comprising one or more ridge-like structures; and

an inner profile comprising a J-slot configured to connect to the anchor;

where the screen comprises a third set of threads configured to connect to another screen segment forming a screen assembly,

where the liner hanger is coupled to the casing string, and

where the outer profile is configured to match the inner profile of the setting seat collar on a previously installed casing string.

10. The system of claim 9 , where a length of the screen assembly is about equal to a length of a completion zone of a wellbore in which the system is disposed.