Development of gas-tight threads based on API round threads and its evaluation
Great economic benefit will be made if a kind of low-cost gas-tight thread can be developed on the basis of API round thread with a relatively lowest cost to replace the existing premium thread. In this paper, a kind of gas-tight threads was designed and manufactured based on the round threads accor...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2017-11-01
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| Series: | Natural Gas Industry B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854017301341 |
| _version_ | 1797288673528512512 |
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| author | Yongqiang Zhang Li Liu Jinfu Lu Zhifu Yin Ke Wang Jie Liu Chuan Ta |
| author_facet | Yongqiang Zhang Li Liu Jinfu Lu Zhifu Yin Ke Wang Jie Liu Chuan Ta |
| author_sort | Yongqiang Zhang |
| collection | DOAJ |
| description | Great economic benefit will be made if a kind of low-cost gas-tight thread can be developed on the basis of API round thread with a relatively lowest cost to replace the existing premium thread. In this paper, a kind of gas-tight threads was designed and manufactured based on the round threads according to the API Spec 5B standard. An elastic sealing ring was added in the middle of the collar, and gas tightness was realized by virtue of the interference matching between the elastic sealing ring and the casing thread. Then, its ultimate bearing capacity was analyzed by using the finite element analysis software MSC.Marc/Mentat. Finally, ISO 13679 B series and C series tests, and tension tests under internal gas pressure in the bending setting were carried out on Ø73.02 × 5.51 mm J55 gas-tight threads according to the ISO 13679 standard. It is shown that the gas sealing performance of this gas-tight thread is good, and the results of ultimate internal pressure cycling and the thermal cycling test on sealing pipe ends meet the requirements of ISO 13679. Besides, its internal pressure strength, tensile strength and collapse strength are much higher than those required by GB/T 20657 standard. It is concluded that this type of gas-tight threads can be used in the development of low-pressure gas wells in the Ordos Basin. It has the potential to cut down the casing cost greatly and it can be used as the reference for the design of new gas-tight threads. |
| first_indexed | 2024-03-07T18:52:54Z |
| format | Article |
| id | doaj.art-fe7a2ce6919342d4af6409f3209e28d5 |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2024-03-07T18:52:54Z |
| publishDate | 2017-11-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Natural Gas Industry B |
| spelling | doaj.art-fe7a2ce6919342d4af6409f3209e28d52024-03-02T01:08:55ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402017-11-014646346910.1016/j.ngib.2017.09.008Development of gas-tight threads based on API round threads and its evaluationYongqiang Zhang0Li Liu1Jinfu Lu2Zhifu Yin3Ke Wang4Jie Liu5Chuan Ta6Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710075, ChinaResearch Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710075, ChinaBaoshan Iron & Steel Co., Ltd., Shanghai 201900, ChinaResearch Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710075, ChinaResearch Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710075, ChinaResearch Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710075, ChinaResearch Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, Shaanxi 710075, ChinaGreat economic benefit will be made if a kind of low-cost gas-tight thread can be developed on the basis of API round thread with a relatively lowest cost to replace the existing premium thread. In this paper, a kind of gas-tight threads was designed and manufactured based on the round threads according to the API Spec 5B standard. An elastic sealing ring was added in the middle of the collar, and gas tightness was realized by virtue of the interference matching between the elastic sealing ring and the casing thread. Then, its ultimate bearing capacity was analyzed by using the finite element analysis software MSC.Marc/Mentat. Finally, ISO 13679 B series and C series tests, and tension tests under internal gas pressure in the bending setting were carried out on Ø73.02 × 5.51 mm J55 gas-tight threads according to the ISO 13679 standard. It is shown that the gas sealing performance of this gas-tight thread is good, and the results of ultimate internal pressure cycling and the thermal cycling test on sealing pipe ends meet the requirements of ISO 13679. Besides, its internal pressure strength, tensile strength and collapse strength are much higher than those required by GB/T 20657 standard. It is concluded that this type of gas-tight threads can be used in the development of low-pressure gas wells in the Ordos Basin. It has the potential to cut down the casing cost greatly and it can be used as the reference for the design of new gas-tight threads.http://www.sciencedirect.com/science/article/pii/S2352854017301341CasingRound threadGas-tight threadFinite element analysisFull-scale testLow-pressure gas fieldOrdos Basin |
| spellingShingle | Yongqiang Zhang Li Liu Jinfu Lu Zhifu Yin Ke Wang Jie Liu Chuan Ta Development of gas-tight threads based on API round threads and its evaluation Natural Gas Industry B Casing Round thread Gas-tight thread Finite element analysis Full-scale test Low-pressure gas field Ordos Basin |
| title | Development of gas-tight threads based on API round threads and its evaluation |
| title_full | Development of gas-tight threads based on API round threads and its evaluation |
| title_fullStr | Development of gas-tight threads based on API round threads and its evaluation |
| title_full_unstemmed | Development of gas-tight threads based on API round threads and its evaluation |
| title_short | Development of gas-tight threads based on API round threads and its evaluation |
| title_sort | development of gas tight threads based on api round threads and its evaluation |
| topic | Casing Round thread Gas-tight thread Finite element analysis Full-scale test Low-pressure gas field Ordos Basin |
| url | http://www.sciencedirect.com/science/article/pii/S2352854017301341 |
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