# How do you calculate bottom up time?

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Bottoms Up Time. Bottoms up time with one pump working at 110 SPM is the same as the full annular capability (drill string within the gap) divided by the pump output in barrels per minute.

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Concerning this, how is Bottoms Up calculated?

Bottoms Up” Strokes = Annular Quantity bbls / Pump Output in bbls-stk. The very first thing we should to do in an effort to calculateBottoms Up” or Bit to Floor” strokes is to seek out the Annular Quantity. Annular Quantity bbls = (Dh^2 – OD^2) / 1029.4 x Size in ft, the place Dh is the opening diameter.

Moreover, how is lag time calculated in drilling? With sure annular quantity, the lag time, usually expressed in minutes, might be decided by dividing the annular quantity (bbls) by the movement rate (bbl/min). If there are modifications in mud movement rate, the lag time determine will likely be modified as nicely.

Accordingly, how do you calculate lag time?

Time = Distance / Velocity What would the lag time be if the space traveled had been 500 miles? Car A would take 10 hours to journey 500 miles, however Car B would take 20 hours. The lag time right here is 10 hours. So, the sample you must observe right here is “the better the space, the longer the lag time.”

What does bottoms up imply in drilling?

adj. [ Drilling] Pertaining to the mud and cuttings which might be calculated or measured to return from the backside of the opening for the reason that begin of circulation. Circulation could also be initiated after a static interval, similar to a visit, or from a given depth whereas drilling.

### What’s a lag time?

Lag time is a delay between duties which have a dependency. For instance, if you happen to want a two-day delay between the end of 1 job and the beginning of one other, you’ll be able to set up a finish-to-start dependency and specify two days of lag time. You enter lag time as a constructive worth.

### What’s lag time in hydrology?

Summary River basin lag time (LAG), outlined because the elapsed time between the incidence of the centroids of the efficient rainfall depth sample and the storm runoff hydrograph, is a crucial think about figuring out the time to peak and the height worth of the instantaneous unit hydrograph, IUH.

### What’s lag time earthquake?

A typical seismogram of an earthquake has three outstanding wave patterns. The primary waves to reach are the P-waves (additionally referred to as “main” or “push-pull”). The time distinction, as recorded on a clock, between when the P-waves and S-waves arrive is known as the lag time.

### What’s lag time geology?

Lag time is the time the mud takes to journey inside the opening between two specified depth factors. The time taken between the floor to the underside of the opening is known as ”lag down“ or “Lag in”. The time taken between the underside of the opening to the floor is known as ”lag-up“ or “bottoms’up”.

### Why do we are saying bottoms up?

Bottoms Up That means

Definition: Drink! Individuals will say, “bottoms up” to encourage others to drink one thing. If you’re holding a cup filled with liquid and raise it to your mouth to drink, you’re elevating the cup in order that the backside can be seen, thus bringing the backside up.

### What’s backside mud?

The time period refers notably to a mud pattern that has skilled stagnant circumstances on the backside of the opening, together with the temperature, stress and different circumstances at that depth. A bottoms-up pattern is usually collected after a visit out of the opening or if an inflow of formation fluid is suspected.

### What’s closed finish displacement?

ClosedFinish Pipe – Displacement, as associated to drill pipe, drill collars and tubulars is the quantity of fluid that the pipe will displace if positioned into fluid with the decrease finish closed to permit no fluid inside. The pipe’s outdoors diameter, OD, is used within the equation beneath.

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