... of the drillpipe, the diameter of the pipe, and continuous circulation. The objective of the modeling was to understand the relative impact of changes to the system on the temperature of the drilling fluid and the most cost-effective way to deliver a 150º C fluid to the bottom of the hole. Results, Observations...

... should be provided during run-in-hole, and further refinements generated when circulation and rotation are first established, prior to the drilling phase. Those requirements impose to design flexible solutions that make optimum use of the few available measurements. We based our system on ensemble...

... Abstract High bottom hole temperature can lead to decreased downhole tool life in geothermal and high temperature / high pressure (HPHT) oil and gas wells. The temperature increase is exacerbated when circulation stops, e.g., during connection, tripping, well control situations, etc. While...

... Abstract The hydraulic effects on torque and drag modelling have been thoroughly studied in the past, yet their interpretation still causes a lot of misunderstandings and confusions. Historical models disregard the circulation effects and focus on the fluid mass by employing buoyancy forces...

... of Well #1 Figure 2 General lithology profile of Well #1 Figure 3 Lost Circulation of Offset Well #1 Figure 4 General Schematice of Well #2 Figure 5 General Lithology Profile of Well #2 Figure 6 Lost Circulation of Offset Well #2 Figure 7...

... optic cable, pressure, and temperature gauges installed on the outside of casing. The pressure and temperature gauges were run concurrently with the fiber optic allowing further evaluation along the lateral during prejob circulation and the cementing operation. The fiber optic cable and gauges were...

... drilling fluid chemistry drilling fluid property casing and cementing circulation pozzolanic material glass ball portland cement drilling fluid formulation pozzolan natural pozzolan drilling fluid selection and formulation fluid loss control upstream oil & gas exhibition loss zone lcm...

... where, T 0 is the formation's tensile strength. Once the tensile fracture is initiated, it has propensity to propagate so that the drilling fluid cannot be circulated to the surface as it is ‘lost’ to the induced fracture. Fracture gradient is defined as the pressure gradient at which...

... Abstract Continuous Circulation Systems (CCS) have been used in the past to help drill wells where interactions between the mud weight and theformation may increaserisks, thereby allowing the well to be drilledwithout encountering drilling problems or damaging the formation, whilst reaching...

... Skagerrak 2 reservoir. The lost circulation risk was high during cementing because the Hugin formation, located above the reservoir, contained 40 m [~ 131.2 ft] of highly porous and permeable sandstone. During previous operations in the field, lost circulation was observed before and during the casing...

.... planning & scheduling simulation well control annular pressure drilling artificial intelligence upstream oil & gas information risk management circulation international association operational sequence application simulation sequence incident workflow procedure integration...

... gas circulations out of the riser. The effects of circulation flow rate, backpressure applied at surface and amount of gas inside the riser on pressures and flow rates are displayed and analyzed. production monitoring production control drilling fluid management & disposal downhole sensor...

... in a wider fracture than that which is predicted by the purely elastic models. If drilling mud temperature is not considered or managed effectively, the failure of the WBS application could result, leading to a lost circulation event. A field case where wellbore cooling occurs and leads to lost circulation...

... circulation mud weight mpd operation matrix primary barrier limitation Introduction The drilling process includes various process safety risks. These risks are potentially increased during exploration drilling when the pressure margins are not known, and the subsurface uncertainty is higher...

... the system for use The focus in this paper is to describe the qualification of a new automated pressure control method (Autochoke system) used on the Scarecrow wildcat well in the Barents Sea for circulating out an influx. Simulations and return of experience indicated that manual conventional well...

... Upstream Oil & Gas calculation ppg Bjørkevoll absorption equation influx skogestad well control incident circulation reservoir pressure Influx Rate control incident artificial intelligence annular pressure drilling Simulation well control event gas influx Scenario bjørkevoll...

...) and continuous circulation technologies as a potential solution to this drilling hazard. In case that the overpressured interval was not seen, the DwL BHA could be retrieved after which the remaining section would be drilled conventionally. The DwL process allows a hazardous interval to be isolated in a single...

... Abstract A model of the diffusion of methane into a wellbore in overbalance with Oil Based Mud is described. In some situations, methane diffusion may cause unexpected gas in riser and well control problems. The situation when the OBM contaminated with diffused methane is circulated...

... Table 1 Classification of circulation losses according to severities Classification Circulation Loss Rate (bbl/hr) Minor Seepage 1-20 Moderate Seepage 20 - 100 Heavy Seepage 100-400 Partial Returns to No Returns ≥ 400 (or returns less than 50%) Natural fractures...

... hydraulic fracturing re-fracturing casing and cementing drilling operation isolation completion refracture modification Directional Drilling circulation help ensure complex reservoir Upstream Oil & Gas lateral rheological property recovery perforation wellbore cement bond...