Pipe guide arms for blind shear rams

一种引导臂、闸板的技术，应用在密封/封隔、井眼/井部件、土方钻采等方向，能够解决管柱不完全剪切等问题

Active Publication Date: 2013-01-09
HYDRIL USA MANUFACTURING LLC
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some pipeline ram assemblies, there is a small possibility that the pipe string will remain at the outer wall of the borehole during closure, which may result in incomplete shearing of the pipe string

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pipe guide arms for blind shear rams
  • Pipe guide arms for blind shear rams
  • Pipe guide arms for blind shear rams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] refer to figure 1 , shows the shear ram 11 removed from the housing or bonnet in which the shear ram 11 is located. The shear ram 11 is part of a ram BOP assembly which is part of a stack assembly. In the case of offshore drilling, the stack assembly is located at the lower end of a riser extending down from the drill ship. The lower end of the BOP stack assembly is secured to the subsea wellhead on the seabed. The BOP stack assembly will also typically contain pipe rams, variable aperture rams, and a quick disconnect mechanism for disconnecting from the riser in an emergency. When actuated, the shear ram 11 will close the through-bore and also shear tubing in the well, such as drill pipe, tubing or tubing string.

[0018] The shear ram 11 includes an upper ram assembly 13 having a face or front end 15 . A semicircular sealing groove 16 is located on the upper side of the upper shutter unit 13 to receive a portion of the elastomeric seal. An upper shearing blade 1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A pipe shear ram assembly (11) has a housing (73) having a bore (75) extending vertically therethrough for the passage of a pipe string (77). Ram blocks (13, 51) have blades (17, 63) positioned such that one slides over the other when the first and second ram blocks (13, 51) are moved toward each other to shear a well pipe (77). A pair of guide arms (25) extend from one of the rams (13). The guide arms (25) have tips (29) protruding a greater distance than the blade (17). Each of the guide arms (25) has an inboard wedge surface (31) beginning at the tip (29) and extending along a line that intersects the longitudinal axis (28) for guiding the pipe string (77) toward a bore axis (79) of the bore (75) in the event the first and second ram blocks (13, 51) are moved to the closed position.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to Provisional Application Serial No. 61 / 496,835, filed June 14, 2011. technical field [0003] The present disclosure relates generally to drilling, and more particularly to a shear ram (ram) assembly for a blowout preventer ("BOP") having a guide arm to allow well tubing to The sidewall of the eyelet of the shear ram assembly moves away from it during shearing. Background technique [0004] Offshore drilling rigs typically employ risers to connect the subsea wellhead to the drilling rig. The blowout preventer is located at the lower end of the riser. Onshore rigs also use blowout preventers. A blowout preventer is a large assembly with many features used to seal off the riser if high pressure in the wellbore begins to push the drilling mud upward. These features include annular blowout preventers that seal around the pipe regardless of diameter. The blowout preventer also has pi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/064
CPCE21B33/063
Inventor W.L.卡鲍夫L.G.蔡尔德斯V.沙
Owner HYDRIL USA MANUFACTURING LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap