Rotary-steerable drilling provides unique features such as an extended reach and accurate well trajectory control. These characteristics can notably increase efficiency safety. One of the main technical difficulties rotary-steerable is dynamically measuring spatial attitude at bottom rotating drillstring rotates. We developed a strap-down measurement system, with triaxial accelerometer magnetometers installed near bit. The inclination azimuth be measured in real time even Although magnetic...

The swing of the riser in deep-water drilling can significantly impact drill string. In this study, we establish a model that considers combined disturbance periodic dynamic wind and wave loads. By coupling it with string model, develop for systems. Through analyzing multiple sets different parameters, examine displacements forces at various positions along system. Specifically, our focus lies on velocity, acceleration, rotational speed information BHA. We investigate how WOB influence...

In the oil drilling process, measurement-while-drilling system is usually used to provide real-time monitoring of position and orientation bottom hole. Usually drill string attitude measured on condition that static. Particularly, in rotary steerable application, it a challenging problem accurately measure spatial (inclination, azimuth, tool face) with rotating. A set "strap-down" measurement was developed this paper, triaxial accelerometer fluxgate were installed near bit, well deviation...

Most studies related to aspects of wellbore stability, such as breakage, block dropping, and expansion, revolve around the physicochemical interaction between drilling fluid surrounding rock, but relevant show that drill string vibration during also has a crucial even decisive influence on stability. In order thoroughly explore mechanism our research group established finite element flexible simulation model dynamics used storage downhole measurement device collect real data verify...

Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI

<title>Abstract</title> With the advancement of hydrocarbon reservoir development into deepwater environments, application Push-the-Bit Rotary Steerable Systems (PTB-RSS) in drilling operations has become increasingly prevalent. However, due to dynamic transmission characteristics seawater riser systems, surface monitoring systems struggle effectively capture downhole high-frequency vibration signals, posing significant challenges performance and operational reliability Bottom Hole...

The pendulum model is a classic in physics and has important theoretical practical significance. In the actual application process of engineering, characteristic that simple tendency to always be stable towards low side gravitational potential energy often used design corresponding deformation mechanism as sensing or control component. this paper, structure based on analyzed, nonlinear dynamic under variable damping established according force analysis. Due complexity its analytical...

Continuous wave mud pulse transmission is the most widely used information technology in measurement while drilling (MWD). The increase distance will cause signal attenuation and deformation during transmission, affecting exploration efficiency. waveform change law of continuous process downhole this paper establishes a mathematical analysis model, focuses on modulation form signal, physical characteristics, drill pipe discusses rules various characteristics pressure wave. A simulation...

Abstract For the increasing well plugging in oilfield development, a new unplugging technology is presented this paper for downhole by using high voltage pulse wave. Based on mechanism analysis, circuit resistance model and empirical calculation formula of pressure shock wave are obtained, influence same current waveform generated wire explosion preliminarily studied laboratory experiments under different energy conditions. A corresponding evaluation test device was designed to simulate...

Drill string vibration is a widely studied topic. This paper developed real-time measurement system near the drilling bit and extracted lateral vibration, longitudinal time series of bottom rotating drill string. In order to reconstruct phase space, we estimated delay with mutual information calculated embedding dimension through Cao’s method. Finally, chaotic characterization analyzed by calculating correlation largest Lyapunov exponent. The results show that such can exhibit positive...

As the exploration of ultra-deep layers and development geothermal resources continue, obtaining more accurate downhole parameters becomes increasingly important. Flow measurement, in particular, is a complex parameter that presents significant challenges. In order to enhance accuracy turbine flow logging tool, this research focuses on optimizing metering structure through range methods. A calculation model related measurement process established, field characteristics flowmeter are analyzed...

Summary Exploiting geothermal resources such as hot dry rocks (HDRs) requires directional drilling technology. Measurement-while-drilling (MWD) technology plays a crucial role in measurement. However, its high temperature and environment limit downhole measurement instruments application. For this research, we designed an MWD system with mechanical gravity tool face, the fully structure was used to overcome high-temperature constraints. The bias stabilization platform, face coding method,...

With the continuous development of geological engineering field, high-voltage electric pulse plasma rock-fracturing technology has become a research hotspot in recent years. It is now widely recognized that this fracturing many application prospects and great economic benefits. Through process technology, it proven to be an efficient new type which overcomes problems high cost, low efficiency, safety risk, serious pollution associated with traditional technology. Also, unique advantages...

Abstract. Vibration and high shock are major factors in the failure of downhole tools. It is important to study causes vibration formation prevent drillstring bottom hole assembly (BHA). At present, it generally recognized that main reason for failure, especially lateral vibration. In this paper, tool Rotary Steering Drilling System (RSS) calculation model was established based on secondary development ABAQUS software. Starting from initial configuration drilling tool, considering contact...