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bhc quick sleeve threaded joint

A technology of threaded joints and casing joints, which is applied in the direction of casing, drill pipe, drilling equipment, etc., can solve the problems of increasing the cost of oil extraction, and achieve the effects of saving make-up time, improving operation efficiency, and reducing the number of screwing turns

Inactive Publication Date: 2016-07-06
CNOOC ENERGY TECH & SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the cost of oil extraction is bound to increase

Method used

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  • bhc quick sleeve threaded joint
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Embodiment Construction

[0026] In order to make the technical solution of the present invention more clearly understood, it will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] refer to figure 1 , figure 2 , image 3 , Figure 4 , the BHC quick casing threaded joint of the present invention comprises a collar 2 and two casing joints 1 respectively connected to the two ends of the collar 2;

[0028] The outer diameter of the casing joint 1 is provided with a tapered pipe external thread 7 that gradually shrinks from outside to inside, and the inner diameter of the coupling 2 is provided with a tapered pipe external thread 7 that gradually shrinks from outside to inside and fits with the tapered pipe external thread 7 . Tapered pipe internal thread 3;

[0029] The outer surface of the casing joint 1 is provided with an outer shoulder transition surface 10 and an outer torque shoulder 9 sequentially from the outside to the inside in addition to t...

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Abstract

The invention discloses a BHC fast casing threaded joint, which comprises a coupling and casing joints respectively arranged at both ends of the coupling; the outer diameter of the casing joint is provided with a tapered taper that gradually shrinks from outside to inside. The external thread of the pipe, and the external shoulder transition surface and the external torque shoulder are arranged in sequence; the internal diameter of the coupling is provided with a tapered pipe internal thread that gradually shrinks from the outside to the inside and fits with the external thread of the tapered pipe, and is set in turn There are undercuts, internal shoulder transitions and internal torque shoulders. The advantages of the present invention are: compared with the API casing thread of the prior art, the thread pitch and the angle of the guide surface are increased, the tooth height and the effective thread length are increased, thereby strengthening the anti-compression and anti-bending ability of the thread, and improving the The anti-sticking performance of the joint makes it have a stronger bearing capacity, is less likely to be wrongly buckled, and improves the fastening speed and connection strength, ensuring the integrity of the joint buckle.

Description

technical field [0001] The invention relates to a casing threaded joint, more specifically, the invention relates to a fast casing threaded joint used for oil field drilling and production development. Background technique [0002] With the rapid development of the country's economy, my country's demand for oil is also increasing, and the speed of drilling and production of oil fields is getting faster and faster. However, the traditional API threaded casing used in oilfield drilling has defects such as difficult to confirm, small taper, slow make-up, and long screwing time, which seriously affects the operation efficiency. [0003] At present, with the improvement of my country's oilfield exploration and production speed, the demand for quick buckle casing is increasing year by year. For this reason, my country needs to spend a lot of money every year to import quick buckle casing from abroad to meet the domestic oil development stage. need. In this way, the cost of oil ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/08
Inventor 张洪波李振坤司磊张兴光万亚军邓建明杨成刘书杰谢梅波郭腾飞李立宏顾燕
Owner CNOOC ENERGY TECH & SERVICES
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