... and circulate the well clean at the previous casing shoe Back reaming should be done at close to drilling parameters with control over the rotary overpull to minimise the risk of twist off if restriction is encountered The top-hole section of Well FX-3 involved the drilling of the 8 1/2" pilot hole...

... to the desired direction. This paper investigates the challenges and prospects of using the HDD technique to lay pipeline to a greater depth/distance that will be inaccessible by the oil thieves. The construction process (pilot hole, reaming and pullback) along with the major components (drill rig, drill pipe...

..., the higher construction costs and technical complexity demand the utmost care in their placement. To this end, pilot holes are drilled in order to exactly identify the target zones. The task to precisely identify the sweet spots where to place the horizontal wellbore is sometimes challenging. For start...

... operation with the industry so that drilling operational process can be improved and well cost reduced significantly. emergency scenario petrobras operation well location circulation pilot hole hole section shallow gas scenario drilling operation deepwater drilling operation challenge...

... inner barrel spe 140628 pilot hole recovery shell nigeria exploration ike nnoaham Introduction Deep water coring in unconsolidated environments comes with both technical challenges and increased cost as a result of higher rig rates and longer rig time taken to execute the coring operation...

... the pilot hole and horizontal landing section to maximize recovery. A pilot hole was drilled to intersect the range 7147' to 7190' of possible OWC depths. The OWC was found to be very close to the most likely contact scenario. Subsequently, the producing section was landed at the optimum location...

... LWD from a pilot hole, a horizontal sidetrack was optimised in the high permeable section of the thin reservoir. In addition, NMR logs demonstrate the horizontal section was placed generally within the sweet spot of high free fluid section. Drawing experience from the first case study, a more...