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Improvements in or relating to hydraulic rams

A technology of blowout preventer and ram, which is applied in wellbore/well components, sealing/isolation, earthwork drilling and production, etc. It can solve problems such as difficult configuration, heavy seabed blowout preventer or closing system

Inactive Publication Date: 2008-02-20
海德尔美国制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size and weight of these collectors make the subsea BOP or closure system heavier and therefore more difficult to configure

Method used

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  • Improvements in or relating to hydraulic rams
  • Improvements in or relating to hydraulic rams
  • Improvements in or relating to hydraulic rams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] According to a first embodiment of the invention, reference numbers are first set in Figure 1 of the accompanying drawings showing a hydraulic blowout preventer ram generally indicated by reference numeral 10, auxiliary force actuator 12 is installed on the hydraulic blowout preventer ram.

[0047] Hydraulic BOP ram 10 is part of BOP 14 . The blowout preventer 14 includes a body 16 having an axial bore 18 therethrough and at least one transverse port 20 entering the bore 18 . The hydraulic BOP ram 10 is mounted at the transverse port 20 . The BOP ram 10 includes a cylindrical shaft 22 having a piston 24 at a first end and a shear blade 26 mounted at an opposite end. The piston operates in the BOP ram chamber 36 by pressurization of hydraulic fluid behind the piston 24 .

[0048] Drill rod or tubular 28 is positioned through bore 18 as is conventional. In the event of a blowout, the piston 24 is actuated to force the shaft 22 towards the bore 18 . Typically, two opp...

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PUM

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Abstract

The present invention discloses an actuator for a piston of a shear ram for transmitting an auxiliary force in a blowout preventer (BOP), and a corresponding BOP. In one embodiment, the disclosed auxiliary force actuator (12) is used on a hydraulic BOP ram (10), the actuator comprising an actuator body (30) connected to the hydraulic BOP ram; First and second chambers (38, 36) in the body, the chambers are isolated from each other by the actuator piston (46); a rod (42), which is connected to the hydraulic blowout preventer ram an operating piston (24), through the first chamber and the actuator piston, and extending into at least a portion of the second chamber; wherein the actuator piston is releasably engaged with the rod by a clamping device (48) ; and wherein the hydraulic blowout preventer ram is operated by force from movement of the operating piston and auxiliary force from movement of the actuator piston.

Description

technical field [0001] The present invention relates to hydraulic rams and in particular, but not exclusively, to the actuation of a piston of a shear ram for transferring auxiliary force into a blowout preventer device. Background technique [0002] There are many applications where hydraulic BOP rams are used. Each BOP ram typically includes a piston that is driven forward by hydraulic force. In oil well drilling, hydraulic blowout preventer rams are located in the blowout preventer. In emergency situations, when the well needs to be shut in to prevent a blow out while drilling, two opposing blowout preventer rams are brought together to seal the wellbore. These BOP rams are typically referred to as shear rams because they include shear blades on the front face of the piston for severing drill pipe or casing in the wellbore. [0003] When the shear rams are hydraulically actuated, opposing shear blades come together to interact as the blades are driven by hydraulic pis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/06
Inventor 安东尼·斯蒂芬·班福德
Owner 海德尔美国制造有限责任公司
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