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Ultra high torque double shoulder tool joint

An inner shoulder, higher technology, applied in the field of oilfield pipeline thread connection device

Inactive Publication Date: 2000-08-02
GRANT PRIDECO LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, neither the patent by Hall et al. nor U.S. Patent No. 5,492,375 achieves a geometrically balanced form of threaded connection without the need to relate the nose portion diameter or cross-sectional area to the thread length

Method used

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  • Ultra high torque double shoulder tool joint
  • Ultra high torque double shoulder tool joint
  • Ultra high torque double shoulder tool joint

Examples

Experimental program
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Effect test

Embodiment Construction

[0036] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0037] see now figure 1 , a tubular male threaded joint 10 is located at one end of a section of drill pipe, and is used to cooperate with a tubular type female threaded joint 12 of another section of drill pipe. The other end of the drill pipe with male nipple 10 has a female nipple similar to female nipple 12 . Likewise, the other end of the drill pipe with the female nipple 12 has a male nipple similar to the nipple 10 .

[0038] The male tubular nipple 10 includes external threads 22 extending axially between a radially outward outer shoulder 18 and a radially inward male nipple surface 26 . The male nipple 10 also includes a base portion 16 extending axially between the outer shoulder 18 and the external thread 22 and a forward portion extending axially between the male nipple surface 26 and the external thread 22 twenty four. The nose portion 24 defines a nose cross-sectional area 28 between its inner diameter...

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Abstract

An ultra high torque double shoulder tool joint for maximizing the torsional strength of a threaded connection by correlating a transverse cross-sectional counter-bore area of the box (12) and pin (10). The pin (10) includes a base section (74) and a nose section (24). The nose section (24) defines a cross-sectional nose area (28). The pin external threads (22) include a taper no greater than 1 / 12. The box (12) include a cross-sectional counterbore area (46) and a cross-sectional box area (52). The overall strength of the tool joint is dependent upon the torsional strength of the threaded connection, the cross-sectional nose area (28) and the cross-sectional counter-bore area (46).

Description

field of invention [0001] The present invention generally relates to oilfield pipeline threaded connections capable of transmitting torque through the threaded connection during drilling. In particular, the present invention relates to oilfield pipeline threaded connections on drill pipe, drill bushings or tool joints, said threaded connections having a tapered shape between a radially outward shoulder and a radially inward shoulder Thread, which is commonly referred to as a rotary shoulder connection. This double shoulder connection is designed to withstand high torque and maintain a torsional strength similar to that of the oilfield pipeline. Background of the invention [0002] Double shoulder threaded connections on oilfield piping typically have a male connector on one end and a female connector on the other end. Each connector is adapted to mate with a corresponding connector at the opposite end of the other conduit. [0003] The male connector typically has a large...

Claims

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Application Information

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IPC IPC(8): F16L15/00E21B17/042F16L15/06
CPCE21B17/042
Inventor J·E·史密斯T·E·温希普G·E·威尔森
Owner GRANT PRIDECO LP
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