أحجام البئر وزمن الدوران
Annular and string volumes section by section, then the strokes and the minutes to bottoms-up and to a full circulation.
الحفر
الكثافة المكافئة أثناء الدوران وضغط القاع
Annular pressure loss, flow regime and the equivalent circulating density the formation actually sees while the pumps are running.
يجري تحميل الحساب…
جرى هذا الحساب داخل متصفحك. لم يُرسل أي رقم أدخلته إلى أي جهة، ولم يُحفظ شيء.
كيف تُحسب
- Bingham plastic, in the field form: laminar gradient = PV·V/(60000·(Dh−Dp)²) + YP/(200·(Dh−Dp)).
- Critical velocity decides the regime; above it the turbulent correlation ρ⁰·⁸Q¹·⁸PV⁰·²/(1396(Dh−Dp)³(Dh+Dp)¹·⁸) is used instead.
- ECD = effective mud weight + annular loss / (0.052 · TVD). Cuttings loading is applied as a volume-weighted density with 2.6 SG rock.
- If you enter Fann readings, PV = θ600 − θ300 and YP = θ300 − PV.
المعايير التي تتحدثها
أين تتوقف عن الصحة
Bingham plastic over-predicts annular loss for a shear-thinning polymer mud, sometimes by a factor of two or three — a power-law or Herschel–Bulkley model would give a lower and more realistic number, and this tool deliberately does not guess at one. It also assumes one uniform annular geometry, an isothermal column, and no pipe rotation or eccentricity, each of which moves the answer by a meaningful amount. Treat it as a bound and a sanity check, never as a substitute for a hydraulics simulator on a narrow-margin well.
القدرة التي تؤتمت هذا العمل
- DR-06العزم والسحب والهيدروليكا آنياًCompares what the string should weigh and how hard the pumps should work against what is actually measured, and flags the gap.
- DR-15دعم الحفر بالضغط المُدارHelps hold bottom-hole pressure inside a narrow window by predicting what the choke needs to do before the transient arrives.
أدوات ذات صلة
هيدروليك اللقمة واختيار الفوهات
Total flow area, nozzle pressure drop, HSI and jet impact force — plus the nozzle size that would put the optimum share of pump pressure at the bit.
المسح الاتجاهي — الانحناء الأدنى
Paste MD, inclination and azimuth and get TVD, northings, eastings, dogleg severity, vertical section and closure — with the well path drawn.
ورقة القتل — طريقة الحفار
Kill mud weight, initial and final circulating pressure and the step-down schedule, for rehearsal and for checking a sheet that has already been worked.
أداة تدريب