scholarly journals QUANTITATIVE ESTIMATION OF CHANGES IN THE SYSTEM PIPELINE - WELL, IN CASE OF EMERGENCY SITUATION OCCURRENCE DURING HORIZONTAL DIRECTIONAL DRILLING

2016 ◽  
pp. 71-77
Author(s):  
V. S. Toropov ◽  
T. G. Ponomareva ◽  
S. Yu. Toropov ◽  
E. S. Toropov
Keyword(s):  
Quantitative Estimation ◽  
Emergency Situation ◽  
Soil Mass ◽  
Directional Drilling ◽  
Drilling Mud ◽  
Horizontal Directional Drilling ◽  
Pipeline Construction ◽  
Drilling Method ◽  
Additional Resistance ◽  
Resistance Value

The authors presented the approaches for a quantitative estimation of the additional resistance value of moving the pipeline in case of emergency on the collapsed wall of the borehole in absence of mud during the pipeline construction using the horizontal directional drilling method. In addition, the distribution and ratios of pressures, arising from the side of soil mass and drilling mud on the wellbore are found and shown to identify the potentially dangerous areas of the well arch collapse.

EMERGENCY RESPONSE IN THE PIPELINE CONSTRUCTION BY HORIZONTAL DIRECTIONAL DRILLING

2015 ◽  
pp. 91-96
Author(s):  
I. E. Kiryanov ◽  
Yu. D. Zemenkov ◽  
S. M. Dorofeev ◽  
V. S. Toropov
Keyword(s):  
Emergency Response ◽  
Directional Drilling ◽  
Horizontal Directional Drilling ◽  
Pipeline Construction ◽  
Trenchless Construction

On the basis of analyzing the characteristics of used materials and the parameters of trenchless transitions profiles was developed emergency response, including several schemes of release a pipe jammed in the hole during the pipeline pulling in the pipeline construction by horizontal directional drilling. Proposed schemes applicability analyzed for trenchless construction real conditions.

Study of ground collapse induced by large-diameter horizontal directional drilling in a sand layer using numerical modeling

2015 ◽  
Vol 52 (10) ◽  
pp. 1562-1574 ◽  
Author(s):  
Biao Shu ◽  
Baosong Ma
Keyword(s):  
Numerical Modeling ◽  
Oil And Gas ◽  
Large Diameter ◽  
Ground Surface ◽  
Soil Parameters ◽  
Directional Drilling ◽  
Drilling Mud ◽  
Horizontal Directional Drilling ◽  
Ground Collapse ◽  
Mud Pressure

With large-diameter horizontal directional drilling (HDD) becoming the preferred method to construct oil and gas pipelines and utility pipelines beneath rivers, the issue of potential ground collapse arises when drilling in loose geological layers such as sand. Ground collapse is a result of borehole collapse and may cause significant damage to the topography and nearby facilities. The present investigation considered the potential causes of ground collapse induced by an actual 1.219 m diameter HDD river-crossing project, using the FLAC3D numerical modeling tool. The analysis showed that the failure zone first developed at the crown of the borehole, resulting in subsequent borehole collapse due to instability of the sand above, and eventually leading to ground collapse. Sequential reaming cycles have been simulated and the results indicate very little effect in comparison with a single reaming cycle. The risk of borehole collapse, and consequent ground collapse, increases with borehole diameter. Parametric numerical modelling has also been conducted to study the influence of soil parameters and drilling mud pressure on the stability of the ground surface above the borehole. The results show that soil cohesion and friction angle have a large influence on stability of the borehole and ground surface, while elastic modulus and Poisson’s ratio have relatively little effect. It was also determined that mud pressure is a very important factor in maintaining stability of the borehole, and therefore the ground surface as well.

scholarly journals Evaluation of the Construction and Investment Process of a High-Pressure Gas Pipeline with Use of the Trenchless Method and Open Excavation Method. Analytic Hierarchy Process (AHP)

2019 ◽  
Vol 11 (8) ◽  
pp. 2438
Author(s):  
Kwast-Kotlarek ◽  
Hełdak
Keyword(s):  
High Pressure ◽  
Gas Pipeline ◽  
Average Score ◽  
Directional Drilling ◽  
Economic Costs ◽  
Horizontal Directional Drilling ◽  
Analytic Hierarchy ◽  
Multi Criteria Evaluation ◽  
Drilling Method ◽  
Investment Process

The study presents the application of multi-criteria analysis, i.e., the Analytic HierarchyProcess (AHP), for the evaluation of investments related to the realisation of a high-pressure gaspipeline. The authors evaluated the realisation of the gas pipeline with the use of alternativemethods: the trenchless Horizontal Directional Drilling (HDD) method and the open excavationmethod, based on the example of the construction of a high-pressure gas pipeline DN1000. Sectionslocated in naturally valuable areas on the route of the pipeline Wierzchowice-Kiełczów (Poland)were analysed, on the section from the valve station in Czeszów to the Kiełczów node. The researchconsidered the following criteria: technical costs, economic costs, social costs, and environmentalcosts. The sum of these partial estimations is the “total cost” of the investment. Research revealedthat the technical costs of the open excavation method are in all cases higher than the technologicalcosts of the trenchless method during the realisation of a gas pipeline (in the AHP analysis, theyreceive an average score of −4 or −3, compared to a score of −2 for the HDD method). On the otherhand, the economic costs are comparable, with a slight advantage for the HDD method. The overallscore for the open excavation method obtained with use of the AHP multi-criteria evaluation is, fordifferent variants, approximately −19, while the evaluation of the realisation of a gas pipeline withuse of the Horizontal Directional Drilling method gives a score from −15 to −10, depending on thesection.

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