1. Type A,E,K,L for the junks washover. 2. Type C,F,H,G for mending the top fish O.D. 3. Type B,D,I,J,F,G,M,N for hard stratum Description: It is a kind of washover tool, which is used to chear up the downhole rocks,cements around the fallen fish. By its use type it can be divided into:1. Type A,E,K,L for the junks washover.2. Type C,F,H,G for mending the top fish O.D.3. Type B,D,I,J,F,G,M,N for ...