Restore db with encrypted column in SQL Server, without overwriting existing Service Master Key Scenario:

Server1 running SQL Server 2012 with Service Master Key A, db1 with Database Master Key 1, symmetric key and certificate available. Password used to protect the DBMK 1 is unknown, encryption is enabled by SMK A.

Server2 running SQL Server 2012 with SMK B, db2 with DBMK 2, symmetric key and certificate available. Password used to protect DBMK 2 is unknown, SMK B used for encryption.

A restore of db2 to Server1 is required. There's one encrypted column in a table that stores passwords for an internal ASP.NET application. 
There are other applications accessing encrypted data in db1 on Server1 .

Question:

Best option to restore db2 to Server1 and access the encrypted data without causing issues to db1 ?

Tested: 

A simple restore will bring the db2 data, symmetric key and certificate to Server1, but SMK A can't be used to decrypt the data: "Please create a master key in the database or open the master key in the session before performing this operation."
Restored SMK B on a test server and all was good. Can't use this solution on Server1, as I believe that restoring SMK B to Server1 (overwriting SMK A) will disable my access to the encrypted data in db1. Don't want that to happen. 

Any advice ? Thank you.
Server1 running SQL Server 2012 with Service Master Key A, db1 with Database Master Key 1, symmetric key and certificate available.


I assume that the db1 master key is encrypted with the SMK. This makes everything encrypted by the database master key 'available' to applications, w/o having to explicitly open the database master key.

What you need to do is to restore the database, open the database master key using the DBMK password and then add the Server 2 SMK encryption  to the DBMK:

RESTORE DATABESE ... FROM ...;
USE ...;
OPEN MASTER KEY DECRYPTION BY PASSWORD = ...;
ALTER MASTER KEY ADD ENCRYPTION BY SERVICE MASTER KEY;