scholarly journals Force Analysis of Logging Cable in Deep Well

2021 ◽  
Vol 2076 (1) ◽  
pp. 012092
Author(s):  
Wenzhe Zhang ◽  
Jiajia Feng ◽  
Shan Gao ◽  
Zhongzheng Wang ◽  
Jiarui Cheng
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Force Analysis ◽  
Wellhead Pressure ◽  
Deep Well ◽  
Mechanics Model ◽  
Deep Wells ◽  
Cable Force ◽  
Cable Mechanics ◽  
Pressure Changes

Abstract With the increase of deep wells, high temperature and high pressure wells and complex wells, the demand for logging is also increasing. Wireline logging is an important technical means to obtain downhole data in the process of petroleum testing. This paper establishes a cable mechanics model by analyzing the main influencing factors of the cable force in the inclined well section or the vertical well section. Calculate the lifting power of the tool. Through logging calculation, the force change law of the downhole cable and tool string is obtained when the wellhead pressure changes.

Development of Premium Threaded Connections for Casing and Tubing

2013 ◽  
Vol 744 ◽  
pp. 53-57 ◽  
Author(s):  
Lian Xin Gao ◽  
Kun Zhong Sun ◽  
Yi Zhang
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Performance ◽  
Horizontal Wells ◽  
Steam Injection ◽  
Injection Wells ◽  
Deep Wells ◽  
Threaded Connections ◽  
Comparison Results ◽  
High Temperature High Pressure

The application of API threaded connections for casing and tubing is limited due to their imperfect sealing ability and weak connecting strength. To overcome these prominent drawbacks of API threaded connections, new WSP series of premium threaded connections are developed by Wuxi Seamless Oil Pipe Corporation for HTHP(High temperature, High pressure) wells, deep wells, steam injection wells, highly deviated and long horizontal wells, etc. Characteristics and application ranges of eight kinds of these high performance premium threaded connections are compared and analyzed thoroughly in this paper. The comparison results are not only a good reference for technicians to design new connections, but a technical proof for users to choose the proper connections in different applications.

Prevent Barite Static Sag of Oil-Based Completion Fluid in Ultra-Deep Wells

2021 ◽  
Author(s):  
Jianhua Wang ◽  
Jiaqi Zhang ◽  
Lili Yan ◽  
Rongchao Cheng ◽  
Xiaoxiao Ni ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Rheological Parameters ◽  
Stability Factor ◽  
Shearing Force ◽  
Temperature Resistance ◽  
Deep Wells ◽  
Test Operation ◽  
First Choice ◽  
Ultra High Temperature

Abstract Oil-based mud (OBM) is the first choice for complex deep wells due to its advantages of high-temperature resistance, good lubrication and borehole stability. But barite sagging under ultra-high temperature during the long-time stationary completion operation may lead to serious problems in ultra-deep wells, for instance, pipe sticking, density variation and well control problems. In this paper, the influence of high-temperature and high-pressure (HTHP) on the performance of oil-based completion fluid was studied, and a model of rheological parameters was established with HTHP static sag law. The barite sagging stability was evaluated by a high temperature (220°C) and high pressure (100MPa) sag instrument. The results indicated that RM6 value and static shearing force were the main factors of affecting the settlement stability. The viscosity of the completion fluid significantly decreased with the increase of temperature, but increased with the increase of pressure. In addition, the relationship was also studied between HTHP rheology and atmospheric pressure rheology at 50°C. The results showed that when RM6 value was kept above 10, the sag stability factor (SF) of oil-based completion fluid was less than 0.52 at 190°C for 10 days, which proved a good high-temperature sag stability. Furthermore, the anti-high temperature property of oil-based completion fluid was improved through enhancing the temperature-resistance of the additives. And the high-temperature-resistant organic soil was introduced to raise the RM6 value and the static shearing force. Based on these solutions, the barite sag under high temperature of the oil-based completion fluid was prevented during drilling and completion operation in ultra-high temperature wells. The oil-based completion fluid was successfully used in Well Keshen 17 (175°C,7475 m) in Kuche piedmont structure and TT 1 well (210°C,6500 m) in Sichuan basin. The casing run smoothly, the oil-test operation was completed smoothly for 15 days, and no barite sag happened. It testified that the oil-based completion fluid had excellent of high-temperature sag stability. Therefore, this oil-based completion fluid is expected to be used widely in ultra-deep wells.

scholarly journals High temperature and high pressure rheological properties of high-density water-based drilling fluids for deep wells

2012 ◽  
Vol 9 (3) ◽  
pp. 354-362 ◽  
Author(s):  
Fuhua Wang ◽  
Xuechao Tan ◽  
Ruihe Wang ◽  
Mingbo Sun ◽  
Li Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Rheological Properties ◽  
High Density ◽  
Drilling Fluids ◽  
Deep Wells ◽  
Water Based

A Weighted Fracturing Fluid System for Deep Well Stimulation Treatment

2012 ◽  
Vol 488-489 ◽  
pp. 1713-1716
Author(s):  
Qi Zhu ◽  
Shuang Fei Zhong ◽  
Fu Jian Liu
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Treatment Guidelines ◽  
Petroleum Industry ◽  
Temperature Stability ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Deep Well ◽  
Well Stimulation ◽  
Bottomhole Pressure

Petroleum industry is focusing on high-pressure and high-temperature (HPHT) reservoir. The major problem facing to HPHT reservoir is to generate enough bottomhole pressure without exceeding the limitations of equipment on the ground. In order to overcome these problems, weighted fracturing fluid system has been developed whose density can reach up to 1.50 g/cm3. This paper summarizes a study on formulating sodium bromide and sodium chloride as a combined weighted agent and a delayed crosslinked fracturing fluid system which is to cater the fluid and treatment guidelines for the fracturing application. Extensive studies were also conducted to determine temperature stability and anti-shear properties and gel broken.

Research on Calculation Method of Density and Rheology of High-Temperature High-Pressure Drilling Fluid

2021 ◽  
Author(s):  
Lei Wang ◽  
Jin Yang ◽  
Zhengkang Li ◽  
Xinyue He ◽  
Lei Li ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Oil And Gas ◽  
Drilling Fluid ◽  
Absolute Error ◽  
Rheological Parameters ◽  
Fluid Density ◽  
Maximum Absolute Error ◽  
Deep Well ◽  
High Temperature High Pressure

Abstract With the strengthening of exploration and development of deep strata and offshore oil and gas resources, more and more deep wells and deep-water wells have put forward higher requirements for drilling fluid performance. The high-temperature high-pressure of deep well and the low temperature environment of deep well have important influence on the rheology and density of drilling fluid. A new method for calculating the rheology and density of high -temperature high-pressure (HTHP) drilling fluid is proposed and studied in this paper. In this paper, the HTHP rheological data are used to predict the shear stress under different shear rates, and then the wellbore rheological parameters are predicted and analyzed. For the calculation of drilling fluid density, the classical component method static density calculation model established by Hoberock model based on drilling fluid components is analyzed and improved in this paper. The obtained model predicts that the maximum absolute error of drilling fluid density under different temperature and pressure is 0.02 g/cm3, and the absolute error is controlled within 2 %.

Research on High Temperature Mechanical Properties of Casing in Complex Environment Deep Well

2011 ◽  
Vol 383-390 ◽  
pp. 3510-3515
Author(s):  
Jun Wang
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Reduction Factor ◽  
Effect Of Temperature ◽  
Strength Reduction Factor ◽  
Deep Well ◽  
High Temperature Mechanical Properties ◽  
Deep Wells ◽  
Tubing String ◽  
Grade Steel

To analyze the effect of high temperature on material properties of steel casing Q125 and V140 in complex deep wells, some experiments of casing material have been done at the temperature of room temperature to 350°C, and based on the former results the material property model of high-grade steel casing under the effect of temperature was established. To facilitate the design of oilfield, uniform strength reduction factor at 150°C and 200°C was given, which was applied to casing string and tubing string design under high temperature. Taking an ultra-deep field as an example, the results show that casing mechanical properties decreases with the temperature increasing; in the design process of high temperature well, the temperature effect is needed to consider.

Study on Multi-Functional Experimental Apparatus for the Performance Evaluation of HTHP Drilling Fluid

2011 ◽  
Vol 422 ◽  
pp. 10-16
Author(s):  
Fu Hua Wang ◽  
Rui He Wang ◽  
Xue Chao Tan
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Drilling Fluid ◽  
Dynamic State ◽  
Mechanical Transmission ◽  
Well Drilling ◽  
New Device ◽  
Deep Well ◽  
Experimental Apparatus ◽  
New Apparatus

With the development of deep well drilling technology, a new HTHP (High Temperature High Pressure) experimental apparatus LH-1 was developed to meet the need of research and evaluation of deep well drilling fluid. With the advanced dynamic seal technology, mechanical transmission and data sensing technology, this new apparatus has many kinds of HTHP testing functions in a body and could evaluate manifold performances at the dynamic state of high temperature and high pressure including HTHP dynamic or static filtration test, high temperature dynamic scattering test of drilling cuttings, HTHP dynamic sealing and plugging tests, ultra HTHP aging test and so on. The lab tests show that the new apparatus gains such advantages as novelty of the design, stability of the performance, accuracy and reliability of the experimental data and facility of the operation. Having overcome the defections of the old apparatuses, the new device can provide a new means of experimental researches for the evaluation of HTHP comprehensive performance of deep well drilling fluid.

scholarly journals НАУКОВІ ТЕНДЕНЦІЇ БУРІННЯ ГЛИБОКИХ НАФТОГАЗОВИХ СВЕРДЛОВИН

2019 ◽  
Vol 1 (1(31)) ◽  
pp. 18-21
Author(s):  
Мирослава Чернова
Keyword(s):  
High Pressure ◽  
Corrosion Fatigue ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Well Drilling ◽  
Gas Industry ◽  
Deep Well ◽  
Deep Wells ◽  
Deformed State ◽  
Drill Column

The essential problems in oil and gas industry are corrosion-fatigue breakage of drill column elements, sticking of drilling and heavy-weight drill pipes, taking place in drilling of directional and horizontal wells. The stickings are caused by friction, emerging between sides of hole and elements of drilling column. The frictions block assurance of core integrity in core receive. The failure resistance by using polymer and composite materials for surface treatment under influence of triboprocess and corrosion-fatigue breakage is considered in the article.The problem of deep well drilling is considered, which is connected with the prevention of the seizure phenomenon between the walls of the drill column and the barrel of deep wells. The design of the coupling connection of casing pipes with a high pressure sealing element is provided to provide the tightness of the casing columns at high pressure and temperature parameters. The elastically deformed state of the pipes with the inserted sealing element is scientifically substantiated.

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