CN202338205U - 一种新型pdc钻头 - Google Patents

一种新型pdc钻头 Download PDF

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Publication number
CN202338205U
CN202338205U CN2011204025419U CN201120402541U CN202338205U CN 202338205 U CN202338205 U CN 202338205U CN 2011204025419 U CN2011204025419 U CN 2011204025419U CN 201120402541 U CN201120402541 U CN 201120402541U CN 202338205 U CN202338205 U CN 202338205U
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China
Prior art keywords
bit
pdc bit
novel pdc
novel
polycrystalline diamond
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CN2011204025419U
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Inventor
董晖
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SHANDONG LUHAI PETROLEUM TECHNOLOGY CO., LTD.
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SHANDONG LUHAI PETROLEUM EQUIPMENT CO Ltd
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Abstract

本实用新型涉及石油开采机械技术领域,尤其为一种新型PDC钻头。一种新型PDC钻头,其特征在于外锥顶部易磨损处增加具有减震和强化作用的后排切削齿。本实用新型在采取了上述技术方案的有益效果如下面所描述:提高了钻进速度和内锥部分齿的寿命,增强了其破岩效果。

Description

一种新型PDC钻头
技术领域
本实用新型涉及石油开采机械技术领域,尤其为一种新型PDC钻头。 
背景技术
随着PDC钻头的广泛使用,其应用范围从过去的软页岩地层,逐步向硬岩地层扩展。随着地层硬度的不断增加,钻头的使用环境也越来越恶劣,钻头的钻速和使用寿命都有不同程度的降低,从而导致钻井成本的增加。 
实用新型内容
为克服上述技术问题,本实用新型提供了一种新型PDC钻头,可以有效的提高钻进速度和内锥部分齿的寿命。 
为实现上述技术目的,本实用新型是通过以下技术方案实现的:一种新型PDC钻头,改变传统PDC钻头的冠部形状,减小外锥圆弧半径,增大了内锥部位的长度,由于内锥部位的岩石易于破碎,相对增加了内锥部位齿的寿命和钻进速度,而锥顶部位岩石可破碎强度较高,可实施局部强化,主要方法是在外锥项部易磨损处增加具有减震和强化作用的后排切削齿。 
本实用新型和以往技术相比具有以下有益效果:由于内锥部位的长度增加使岩石的可破碎强度降低,提高了钻进速度和内锥部分齿的寿命。外锥部分增加了后排切削齿后,增强了其破岩效果和齿的寿命。综合以上两点,可提高整个PDC钻头的钻速和使用寿命。 
附图说明
附图1为本实用新型的结构示意图。 
附图2为本实用新型的钻头冠部示意图 
图中,1后排切削齿,2常规齿,L内锥长度,R外锥圆弧半径。 
具体实施方式
参看附图,通过减小外锥部分圆弧半径R,增加内锥部位的长度L,增加位于钻头内锥部分的岩石体积,从而使岩石的可破碎强度降低,提高了钻进速度和内锥部分齿的寿命。外锥部分增加了后排切削齿1,在正常钻进时可分担常规齿2的部分震动及压力,起到保护效果。当常规齿2出现严重磨损或损坏时,后排切削齿1可继续延续常规齿2的破岩效果,维持稳定钻进速度。 

Claims (1)

1.一种新型PDC钻头,其特征在于外锥顶部易磨损处增加具有减震和强化作用的后排切削齿。
CN2011204025419U 2011-10-21 2011-10-21 一种新型pdc钻头 Expired - Lifetime CN202338205U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011204025419U CN202338205U (zh) 2011-10-21 2011-10-21 一种新型pdc钻头

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Application Number Priority Date Filing Date Title
CN2011204025419U CN202338205U (zh) 2011-10-21 2011-10-21 一种新型pdc钻头

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CN202338205U true CN202338205U (zh) 2012-07-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358522A (zh) * 2014-11-06 2015-02-18 中国石油化工股份有限公司 适应于页岩气井页岩地层钻进的pdc钻头

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358522A (zh) * 2014-11-06 2015-02-18 中国石油化工股份有限公司 适应于页岩气井页岩地层钻进的pdc钻头

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: SHANDONG LUHAI PETROLEUM TECHNOLOGY CO., LTD.

Free format text: FORMER NAME: SHANDONG LUHAI PETROLEUM EQUIPMENT CO., LTD.

CP03 Change of name, title or address

Address after: 250000 North Road, middle of Beichen Road, Lingxian County Economic Development Zone, Dezhou, Shandong

Patentee after: SHANDONG LUHAI PETROLEUM TECHNOLOGY CO., LTD.

Address before: 253500 North Road, middle of Beichen Road, Lingxian County Development Zone, Shandong

Patentee before: Shandong Luhai Petroleum Equipment Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20120718

CX01 Expiry of patent term