Valve assembly and control method for extraction wells in emergency situations
A valve assembly and assembly technology, which can be used in wellbore/well components, earthmoving, sealing/packing, etc., to solve problems such as blocking the stroke of shear elements
Active Publication Date: 2020-04-14
ENI SPA
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] The area of the tool joint subjected to the action of the cutting element tends to fracture under reduced crush and has an unpredictable fracture line; therefore, some metal fragments may remain trapped, blocking the travel of the shearing element and thus preventing the well from moving. closure
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] specific reference figure 1 , this figure shows a conventional floating drilling rig 100 set up for drilling of subsea wells. A safety valve assembly according to the present invention, generally indicated by reference numeral AV, is installed on the wellhead to allow installation of a blowout preventer (BOP), generally indicated by reference numeral 200, during the drilling phase. The wellhead can be of any type. More specifically, the wellhead may include a conductor pipe 600 that is cemented or otherwise anchored or secured to the seafloor or other geological formation in which the subterranean reservoir to be produced exists, wherein the pipe 600 is located in the seafloor. near the surface of a bed or other geological formation; such as figure 1 As shown in , the end of the anchor pipe 600 may emerge or protrude from the seafloor. Production crosses can also be of a known type. At the end of drilling, the safety valve assembly AV may remain installed for the en...
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
Login to View More Abstract
A safety valve for a well for the extraction of hydrocarbons, the safety valve allowing the cutting of tubular drilling material that may be present in the safety valve and the closing of the well by hydraulic sealing, in the event that the BOP would prove to be ineffective Subsequent application of appropriate control intervention procedures to achieve wells can also achieve cutting action of tubular material with a higher capacity than conventional BOPs, taking into account the worst-case stress conditions corresponding to wellheads not currently foreseen by said BOPs. The safety valve assembly (AV) comprises a valve body (2) in which a passage conduit (24) is formed, configured to be traversed by production and / or drilling pipelines, the valve assembly (AV) is provided with: a punch (4), the punch sliding linearly in the housing in a controlled manner along an axis A2 intersecting the longitudinal axis A1 of the pipe; and a recoil head (3) arranged to align with the punch (4) ) just opposite, sliding linearly in the housing in a controlled manner along an axis A2 intersecting the longitudinal axis A1 of the duct. The punch (4) and the recoil head (3) are configured to allow the recoil head (3) to slidingly receive the punch (4) in its interior so as to create two distinct shear planes; the recoil head (3) 3) Constructed with a hollow portion adapted to slidingly receive the punch (4) and the portion of the tubular material in linear motion during shearing operations. In order to make the shearing process more efficient, the valve assembly (AV) may be provided with an upper and lower incision system that incises the surface of the tubular element (26) during the shearing process, creating a preferred fracture plane .
Description
technical field [0001] The present invention relates to valve assemblies and related methods for controlling extraction wells in emergency situations, and in particular, it relates to a valve assembly for use in the event of an uncontrolled eruption (blowout) of an extraction well Or manage the well in emergency situations from temporary overpressure (backlash) of the reservoir formation, such as for example wells used to extract hydrocarbons (oil and / or gas). Background technique [0002] The development trend of the oil and gas industry to explore at increasing depths in offshore areas results in the need to ensure an ever-increasing level of safety for wellheads on the sea or ocean floor at depths approaching 4000 meters; Capabilities and effectiveness represent the necessity and challenge of future-proofing the technology for a safety solution that integrates the current state of Blow-Out Preventers (BOP) installed on production crosses and existing safety valves in well...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B29/08
CPCE21B29/08E21B29/00E21B33/06
Inventor C·莫拉希A·马里亚尔迪A·尼斯塔
Owner ENI SPA