Weight Distribution Characteristics During the Process of Hole Enlargement When Drilling

Jiang, Jun; Lu, Yiyu; Zhu, Xiaohua; Dai, Liming; Liu, Weiji

doi:10.1007/s13369-018-3233-z

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…To date, a number of devices have been designed to expand the diameter of the well in a certain interval. Usually, drilling tools operate in aggressive and abrasive environments under the action of intense loads, so their performance is subject to special requirements [13,14]. This issue is especially significant for tools used for difficult technological operations.…”

Section: Introductionmentioning

confidence: 99%

A Technology of Hydrocarbon Fluid Production Intensification by Productive Stratum Drainage Zone Reaming

et al. 2021

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The paper proposes a new technology for fluid production intensification, in particular hydrocarbons, which is implemented via significant increasing of the local wellbore diameter in the interval, where the productive stratum is present. The proposed technology improves the well productivity by increasing the filtration surface area and opening new channels for filtering fluids into the well. The innovative, technical idea is to drill large diameter circular recesses in planes perpendicular to the well axis. After that, the rock mass located between the circular recesses are destroyed by applying static or dynamic axial loads. The required value of the axial force is provided by the weight of the standard drilling tool. As a result of the study, the analytical relations to specify the admissible radius of circular recesses and admissible thickness of rock mass between two adjacent circular recesses from the condition of safe operation are obtained. The numerical analysis carried out for typical reservoir rocks substantiated the possibility of well diameter local reaming twenty times. A special tool for circular recess drilling is developed and the principle of its operation is described. The advantage of the proposed approaches is the low energy consumption for well diameter reaming. Our technology will have special economic expediency for the intensification of production from hydrodynamically imperfect wells and under the condition of fluid filtration according to the expressed nonlinear law.

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Section: Introductionmentioning

confidence: 99%

A Technology of Hydrocarbon Fluid Production Intensification by Productive Stratum Drainage Zone Reaming

et al. 2021

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The Performance and Failure Mechanism of Drill Bit in Granite Formation Drilling

Liu

Deng

et al. 2022

Arab J Sci Eng

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Real-time drilling rate prediction method of reaming while drilling based on mechanical specific energy

Du²,

Chen³

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

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Reaming while drilling (RWD) is a drilling technique that uses a reamer and a pilot bit to expand the size of an open hole segment to be larger than the inner diameter of an upper casing string while fully drilling, especially in deep wells. This technique reduces the number of trips and is highly efficient and widely used in deep wells, ultra-deep wells, small clearance wells, and side-drilling and complex well conditions. However, in the actual operation process, the mismatching between the pilot bit and reamer often leads to slippage, string vibration, and low-quality borehole.In this paper, based on the mechanical specific energy model and the RWD weight distribution model, combined with the drilling weight, torque, and formation confined compressive strength at the interface of the pilot bit and reamer, a real-time rate of penetration (ROP) prediction model suitable for RWD is derived. Through the analysis of the downhole condition of the RWD operation, reasonable drilling parameters are determined and a set of real-time RWD performance prediction and optimization algorithm is proposed.Studies show that during the RWD operation, the size of the pilot bit and reamer and the shape of the cutter have an enormous influence on ROP. When drilling in different formations, the excellent cooperation among the pilot bit, reamer, and formation is the key to improve ROP and bottom hole assembly stability. How to optimize the bit and reamer to drill with the same ROP and predict the ROP is the focus of this paper.Field logging data test the ROP prediction model and real-time optimization method, and the results indicate that the ROP prediction model has high precision, small error, and high timeliness, which can fully meet the requirements of field engineering. This model can guide the selection of the bit, reamer, and drilling parameters in RWD, which is of considerable significance to RWD.

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Weight Distribution Characteristics During the Process of Hole Enlargement When Drilling

Cited by 3 publications

References 24 publications

A Technology of Hydrocarbon Fluid Production Intensification by Productive Stratum Drainage Zone Reaming

A Technology of Hydrocarbon Fluid Production Intensification by Productive Stratum Drainage Zone Reaming

The Performance and Failure Mechanism of Drill Bit in Granite Formation Drilling

Real-time drilling rate prediction method of reaming while drilling based on mechanical specific energy

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