The Experimental Measurement of Casing Wear Due to Tripping—Part 2: Wire-Line Wear

1975 ◽  
Vol 97 (2) ◽  
pp. 456-463
Author(s):  
J. E. Fontenot ◽  
J. W. McEver
Keyword(s):  
Experimental Investigation ◽  
Experimental Measurement ◽  
Major Conclusion ◽  
Full Size ◽  
Line Wear ◽  
Contact Loads ◽  
Casing Wear ◽  
Water Base ◽  
Wear Tests

An experimental investigation was undertaken to explore the effects of various factors on casing wear due to running wire line. Wear tests were run using full-size samples of casing and wire line. Tests were run at various contact loads in water, a gel mud containing sand, and in a 14-lb/gal water base mud containing various quantities of simulated drill solids. The major conclusion reached is that the presence of abrasive solids in the mud greatly accelerates wire-line wear.

The Experimental Measurement of Casing Wear Due to Tripping—Part 1: Drill Pipe Wear

1975 ◽  
Vol 97 (2) ◽  
pp. 445-455
Author(s):  
J. E. Fontenot ◽  
J. W. McEver
Keyword(s):  
Experimental Investigation ◽  
Experimental Measurement ◽  
Field Data ◽  
Drill Pipe ◽  
Major Conclusion ◽  
Full Size ◽  
Contact Loads ◽  
Casing Wear ◽  
Water Base ◽  
Wear Tests

An experimental investigation was undertaken to explore the effects of various factors on casing wear due to tripping drill pipe. Wear tests were run using full-size samples of casing and drill pipe at various contact loads in water, a gel mud containing sand, and in a 14-lb/gal water base mud containing various quantities of simulated drill solids. The wear results were compared with field data. The major conclusion is that tripping drill pipe is generally not a major cause of casing wear.

An Experimental Evaluation of Drill Pipe Protectors

1977 ◽  
Vol 99 (1) ◽  
pp. 199-207
Author(s):  
W. B. Bradley
Keyword(s):  
Quality Control ◽  
Experimental Evaluation ◽  
Drill Pipe ◽  
Test Results ◽  
Contact Loads ◽  
Casing Wear ◽  
Low Rate

Previous tests [1] have shown drill pipe protectors are of value in reducing casing wear, particularly at high contact loads. However, the brand of protectors tested could not withstand high contact loads without slipping on the drill pipe and tearing apart. As a result, further tests were conducted to find a protector which can withstand high contact loads without slipping or failing and still minimize casing wear. Results from the present tests show that drill pipe protectors can be made to operate at high contact loads without failure, grip the drill pipe without slipping, and maintain a low rate of casing wear. In addition, the test results indicate that drill pipe protector quality control needs to be improved.

EXPERIMENTAL INVESTIGATION TO ENHANCE THE TRIBOLOGICAL CHARACTERISTICS OF A LUBRICANT USING NANOPARTICLE ADDITIVE

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Santhosh V ◽  
Babu N
Keyword(s):  
Experimental Investigation ◽  
Friction And Wear ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Cuo Nanoparticles ◽  
Effective Combination ◽  
Performance And Emissions ◽  
Pin On Disc ◽  
Wear Tests ◽  
Friction And Wear Tests

Copper oxide (CuO) nanoparticles were found to be an excellent additive to the lubricant in order to reduce the friction and wear between piston ring and cylinder liner. Friction and wear tests have been done experimentally using a pin on disc machine. Input parameters like load, speed, distance travelled are varied for each test, so that an effective combination for the minimal friction and wear have been obtained. The effect of adding additive is also found by varying the percentage of the nanoparticle in the lubricant. Also, after the best ratio for the additive in lubricant is selected, it can be used to run the engine in the laboratory, so that the performance and emissions of the engine with the new lubricant can be obtained. Finally, comparison can be made with the engine using existing lubricant.

Single-angle welded–bolted beam connections

1980 ◽  
Vol 7 (2) ◽  
pp. 315-324 ◽  
Author(s):  
Samuel L. Lipson ◽  
Manuel E. Antonio
Keyword(s):  
Experimental Investigation ◽  
High Strength ◽  
The Other ◽  
Full Size ◽  
Load Tests

This paper reports the results of the last phase of an experimental investigation of load tests on full-size single-angle connections in which one leg of the angle is connected to a beam with ASTM A 325 high-strength bolts and the other leg is welded to the supporting member. In the present study, one series of tests has shown that connections with "short slotted" holes are as reliable as similar connections with round holes but provide a greater measure of flexibility. Two other series of connections with round holes, but with different weld patterns, proved to be flexible but could not carry the desired shears.

LATERAL SUPPORT OF STEEL COLUMNS AND STRUTS

1942 ◽  
Vol 20a (8) ◽  
pp. 115-142
Author(s):  
C. R. Young ◽  
W. B. Dunbar
Keyword(s):  
Experimental Investigation ◽  
Maximum Stress ◽  
Lateral Force ◽  
Theoretical Strength ◽  
Percentage Increase ◽  
Ultimate Capacity ◽  
Full Size ◽  
Steel Columns ◽  
Supporting Force ◽  
The Web

Experimental investigation of 19 full-size steel columns was undertaken to disclose (a) the merit of a lateral stay member that does not fix the direction of the column at the point of support, (b) the effectiveness of a stay member that connects to one edge only of the column width, (c) the effect on the required lateral support of initial column curvature or eccentricity, and (d) the maximum stress for which a stay member should be proportioned.The results obtained appear to warrant the following conclusions:(1) The percentage increase in the ultimate capacity of columns due to the introduction of lateral support is greatest for columns with high slenderness ratios and least for those with low slenderness ratios.(2) For a column hinged at both ends, and having end eccentricity of loading up to one-eighth of the column width in the direction of bending, the introduction of lateral support at mid-height, without rotational fixing at this point, raises the strength to from 2. 70 to 4.87 times the theoretical strength of the full-length column as computed by the secant formula.(3) The necessary lateral supporting force of an eccentrically loaded, deflected column, where the lateral force is applied at the middle of the width of the section, is given with sufficient exactness by Equation (22),[Formula: see text](4) The relation between the necessary lateral supporting force applied at the edge of the section and that applied at the middle of the section width for a given deflection of the flange under consideration is given satisfactorily by Equation (23). For the test columns, which had widths of section normal to the plane of bending varying from 6 in. to [Formula: see text] in. and were subjected to loads up to 2.5 times the Euler load for a laterally unsupported column, the lateral supporting force when applied to the edge of a flange was in no case more than 15% greater than that which would have been necessary if applied to the middle of the web at the same flange deflection.

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