Technique for Enhancing the Rate of Penetration through the Application of a New PDC Bit with Rotary Cutters in Deep Formations in the Wenchang Block

LIN Siyuan; LI Zhong; HUANG Yi; CHEN Haodong; YANG Yuhao; GAO Jiji

doi:10.11911/syztjs.201706012

Volume 45 Issue 6

Nov. 2017

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Petroleum Drilling Techniques > 2017 > 45(6): 65-69. > DOI: 10.11911/syztjs.201706012

LIN Siyuan, LI Zhong, HUANG Yi, CHEN Haodong, YANG Yuhao, GAO Jiji. Technique for Enhancing the Rate of Penetration through the Application of a New PDC Bit with Rotary Cutters in Deep Formations in the Wenchang Block[J]. Petroleum Drilling Techniques, 2017, 45(6): 65-69. DOI: 10.11911/syztjs.201706012

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Technique for Enhancing the Rate of Penetration through the Application of a New PDC Bit with Rotary Cutters in Deep Formations in the Wenchang Block

1.
Zhanjiang Branch, CNOOC(China) Co. Ltd., Zhanjiang, Guangdong, 524057, China;
2.
Schlumberger China Petroleum Institute, Beijing, 100015, China

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Received Date: June 12, 2017
Revised Date: November 01, 2017

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Abstract

Drilling deep formations in the Wenchang Block offshore of Western South China Sea with conventional PDC bits often resulted in severe abrasion and low rates of penetration (ROP) issues.Studies have been conducted to enhance ROPs by using innovative PDC bits with rotary cutters.By analyzing challenges in drilling operations in deep formations in the Wenchang Block,with considerations of formation properties and drill bit abrasion,the decision was made to use rotary cutters instead of fixed cutters in the highly abrasive shoulders of conventional PDC bits.With optimized distribution of rotary cutters, innovative PDC bits with rotary cutters were developed in deep formations drilling in the Wenchang Block.The newly-developed PDC bits with rotary cutters were deployed in three exploration wells in the Wenchang Block.Field application results showed that these bits can effectively enhance ROP with higher bit footage and outstanding abrasion-proof performances.Research results showed that innovative PDC bits with rotary cutters have outstanding aggressiveness and anti-abrasion performances.Since these bits can effectively enhance ROPs in deep formations of the Wenchang Block in the Western South China Sea,they can be deployed on a large scale within the block as well as other formations with similar high abrasion properties.
- PDC bit,
- rotary cutter,
- rate of penetration (ROP),
- Wenchang Block,
- Western South China Sea

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Technique for Enhancing the Rate of Penetration through the Application of a New PDC Bit with Rotary Cutters in Deep Formations in the Wenchang Block

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