drilling derrick can be reduced thus the inventive solution can simultaneously provide both a weather protected working handling and storage area and a non bulky and light weight drilling derrick which also can reduce the wind force influence on the drilling derrick fig3 shows an example of a drilling derrick 31 having an enlarged lower part 32 such that a larger enclosed working handling and storage area above the deck 2 can be provided the drilling derrick 31 comprises extending stiffened panels 33 at a lower part 32 of the drilling derrick 31 such that a larger enclosed area above the deck 2 is provided the lower part 32 of the drilling derrick 31 has a cross section surface which is substantially larger than the largest cross section surface of the upper part 34 of the drilling derrick 31 the lower part 32 of the drilling derrick 31 has a cross section surface which is at least 50 percent larger than the largest cross section surface of the upper part 34 of the drilling derrick 31 this drilling derrick 31 having an enlarged lower part 32 may provide a larger enclosed area above the deck 2 than if it had a continuous variation in size from the top part to the bottom part of the drilling derrick fig4 shows an example of a drilling derrick 41 having a raised integrated drill floor structure 42 such that additional working handling and storage area can be provided at the deck 2 the raised drill floor 42 is arranged above the deck 2 on which the drilling derrick 41 is mounted the drilling derrick.