Annular flow optimization: A new integrated approach
- Agip SpA, San Donato Milanese (Italy). Drilling and Completions R and D Dept.
- National Research Council, Turin (Italy)
- Politecnico di Torino, Turin (Italy)
During the drilling stage of an oil and gas well the hydraulic circuit of the mud assumes great importance with respect to most of the numerous and various constituting parts (mostly in the annular sections). Each of them has some points to be satisfied in order to guarantee both the safety of the operations and the performance optimization of each of the single elements of the circuit. The most important tasks for the annular part of the drilling hydraulic circuit are the following: (1) Maximum available pressure to the last casing shoe; (2) avoid borehole wall erosions; and (3) guarantee the hole cleaning. A new integrated system considering all the elements of the annular part of the drilling hydraulic circuit and the constraints imposed from each of them has been realized. In this way the family of the flow parameters (mud rheology and pump rate) satisfying simultaneously all the variables of the annular section has been found. Finally two examples regarding a standard and narrow annular section (slim hole) will be reported, showing briefly all the steps of the calculations until reaching the optimum flow parameters family (for that operational condition of drilling) that satisfies simultaneous all the flow parameters limitations imposed by the elements of the annular section circuit.
- OSTI ID:
- 485058
- Report Number(s):
- CONF-970146-; ISBN 1-890277-02-9; TRN: IM9727%%226
- Resource Relation:
- Conference: Energy week `97 conference & exhibition, Houston, TX (United States), 28-30 Jan 1997; Other Information: PBD: 1997; Related Information: Is Part Of 8. annual international energy week conference and exhibition: Conference papers. Book 3: Drilling and production operations; PB: 336 p.
- Country of Publication:
- United States
- Language:
- English
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