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Tubular connection with helically extending torque shoulder

A technology of helical torque and connecting parts, applied in the direction of threaded connection, pipe/pipe joint/pipe fitting, drill pipe, etc., which can solve the problems of difficulty in manufacturing and measurement, and increase the difficulty of thread processing.

Active Publication Date: 2017-05-24
UNTRA PREMIUM OILFIELD SERVICES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This "wedge thread" has certain disadvantages, the most important being that it is more difficult to manufacture and measure than a thread with only a single pitch
Creating wedge threads on the cone further complicates the threading process and measurement process

Method used

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  • Tubular connection with helically extending torque shoulder
  • Tubular connection with helically extending torque shoulder
  • Tubular connection with helically extending torque shoulder

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other Embodiment approach

[0040] Other embodiments may use more complex forms where some flanks have negative or dovetail angles. The illustrated helical torque shoulder has a cylindrical profile relative to the axis of the connection and therefore does not require axial joint clearance like the make-up thread forms used in oilfield casing or production tubing equipment. The threaded connection must have features that allow it to be assembled on the drilling rig. This requires some kind of "pigment" depth to stabilize the length of pipe hanging in the steel frame tower while the rig crew initiates contact between the two members and makes them rotate together. The main thread 14 in the connection performs this function, while the helical torque shoulder only needs to be optimized to react to an externally applied torque (ie "make-up" torque). Thus, in the contemplated connection, the helical torque shoulder surfaces will not engage or overlap axially when the two members are in the engaged position de...

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Abstract

A tubular connector includes a male joint member and a female joint member. The male fitting member has a first thread formation and a helical torque shoulder axially spaced along the male fitting member from the first thread formation. The box member has a second thread formation and a second helical torque shoulder axially spaced along the box member from the second thread formation. The first thread formation and the second thread formation are sized and positioned to control a stab-in position of the tubular connector in which the first helical torque shoulder is free from contact with the first screw torque shoulder. The two helical torque shoulders engage or overlap axially. A method of connecting tubular members using a helical torque shoulder is also provided.

Description

[0001] cross reference [0002] This application claims priority to U.S. Provisional Application Serial No. 61 / 730,720, filed November 28, 2012, and U.S. Patent Application Serial No. 13 / 798,330, filed March 13, 2013, the entire contents of which are incorporated by reference at this. technical field [0003] The present application relates to tubular connectors, and more particularly, to tubular connectors having a helical torque shoulder arrangement. Background technique [0004] The oil and gas upstream production industry drills oil and gas wells of increasing depth and complexity in order to discover and recover unprocessed hydrocarbons. The industry typically uses steel pipes (oil industry tubing) to protect the wellbore (casing) and to control the fluids produced therein (production tubing). Casing and production tubing are manufactured and shipped in relatively short lengths and are installed in the wellbore one length at a time, with each length being connected to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/042F16L15/00
CPCE21B17/0423F16L15/002E21B17/042F16L15/001
Inventor F·J·豪E·O·班克
Owner UNTRA PREMIUM OILFIELD SERVICES LTD