D Drilling a well is conducted to derive oil or gas to flow from subsurface to surface. Three types of drilling include vertical drilling, directional drilling, and horizontal drilling. Drilling is intended to reach desired depth that has been calculated where the oil or gas reservoir is. The main purpose of drilling a well is to prepare wellbore in order to flow oil and gas from subsurface to surface without any obstacle. Producing oil and gas should be economical. However, drilling operation doesn’t always go smoothly without any trouble. When drill string is no longer able to move up, move down, or rotate, stuck pipe is indicated. Based on literature, stuck pipe is caused by plenty of parameters, such as differential sticking, hole pack off, wellbore geometry, and junk in hole.Drilling is intended to reach the final measured depth safely and economically, to aim for hydrocarbon in form of oil and gas, which will be produced in a period of time. Drilling is expected to be accomplished with no obstacle, however, in fact, everything doesn’t always happen as what we expect, likewise, in drilling operation. There must be a lot of matter that interrupt the operation which is very disadvantageous. To be detailed, these involves disadvantages in equipment, time, and cost. One of problem on drilling operation is stuck pipe, in which pipe movement is restricted in the wellbore, either pipe can’t be rotated and lifted, or, pipe can be rotated but not lifted. This will result in restriction of operation, increase of expenses to release stuck and addition of rig cost.Well X, which is located on North West Java, is planned to be drilled without any problem so oil and gas production can be done effective and efficiently. However, while drilling 8 ½” hole section, there were several problems occurred and one of them is pipe sticking issue. Writer of this final assessment will analyze the cause of stuck pipe in order to know what leads to stuck pipe and how it affects the effectiveness in drilling operation. Some parameters which are going to be discussed are cement plug usage, immersion substance usage, fish left in hole, economic fishing time, and disadvantage cost.In fact, in the following after doing some study and research, stuck is found to be caused by mechanical pipe sticking due to green cement. Total loss happened while drilling, so that cement plug was spotted to cope with it because LCM can’t get over it. Unfortunately, when cement plug was pumped in order to combat total loss, string cannot be pulled out while pulling out of hole after the third cement plug pumping. Before finishing the last 20 bbl of cement plug spotting, there was pressure and torque increase and string could no longer be pulled out since then.Working on pipe, circulating, jarring up and down, and immersing do not solve the stuck pipe. Jar didn’t work because it has been buried with the hardened cement plug. Jar was positioned at 5827.1 feet while the top of cement plug was at 5036 feet. Based on free point indication result, desco pill (immersion fluid) usage can be analyzed that it didn’t work properly. Based of free point indication result, the depth of free pipe was at 4952.2 feet and the top of spotted desco pill was at 4330.8 feet, so it reached the depth of stuck but it didn’t succeed in freeing the stuck pipe.The method used to resolve the issue is sidetracking due to the inability of resolving the stuck pipe issue. Pipe was backed off and whipstock was set in order to build new angle for drilling to restart. Fish that was left on hole consisted of high-priced tools, such as MWD, LWD, and RSS, which couldn’t be recovered due to its difficulties in releasing the stuck. Stuck happened at November 4th and sidetrack was performed at November 12th, due to its limitation of economic fishing time at 8 days. Due to this issue, drilling operational time has extended and several tools has been left in the hole, making total cost disadvantage reached to about USD 6.9 Million.