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Gate valve assembly comprising a support member

Inactive Publication Date: 2016-02-04
FMC TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a gateway valve assembly that effectively cuts off an elongated member before closing the movable gate element. The contact area between the elongated member and the contact area is designed to have a restricted engagement, which concentrates forces at this area and constricts the elongated member, resulting in a satisfactory shearing process. Additionally, the invention provides a mechanism to activate the sealing of the gate dement, ensuring better sealing between the gate dement and the second seat.

Problems solved by technology

If not, there is a risk that the cut parts of the tubular or wire line will be stuck during the dosing of the gate dement, in which case there is no proper dosing of the gate valve and no satisfactory dosing of the well.

Method used

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  • Gate valve assembly comprising a support member
  • Gate valve assembly comprising a support member
  • Gate valve assembly comprising a support member

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0052]FIG. 1 shows a gate valve assembly 1 arranged with a through bore 2 for receiving an elongated member (not shown). A movable gate element 3 has a gate bore 4 for receiving the elongated member and arranged with a cutting tool 16. The minimum opening of the gate bore 4 is essentially equal to the through bore 2. A first seat 5 may be provided as a cutting seat and has an engagement surface 7 arranged in sliding contact with a first surface 8 of one side the gate element 3. A second seat 10 has a seal surface 11 arranged in sealing contact with a sealing surface 12 at the other side of the gate element 3. It is possible to provide the first seat 5 so that the engagement surface 7 provides a seal surface in sealing contact with the first surface of the gate element, in which event the first surface will then act as a sealing surface.

[0053]The first seat 5 is arranged as a support member with an opening 14 encompassing the through bore 2 and an expanded opening portion 40 which is...

second embodiment

[0064]FIG. 2 shows the gate valve assembly 1. In this embodiment the first seat 5 and the second seat 10 have some configurations which may differ from the configurations shown in FIG. 1, but the overall components and the working principles for shearing the elongated member described in connection with FIG. 1 are the same. The gate element 3 is in FIG. 2 shown partly moved from its open position to a closed position. The elongated member 80 to be cut is indicated in the drawing in abutment between the first seat 5 and the gate element 3. A temporary seal surface protection element 31 is arranged for protection of the seal surface 11 of the second seat 10 before the shearing of the elongated element is to take place. The temporary seal surface protection element 31 is arranged to be removed from the gate valve or possibly destroyed prior to the shearing of the elongated member. The protection element 31 may be provided as a brittle material which is easy to destroy. Another possibil...

third embodiment

[0066]FIG. 3 shows the invention, in which the cutting tool 46 is movably arranged in a transverse recess 32 in the gate element 3 opening into the gate bore 4. The cutting tool 46 is arranged to be separately moveable relative to the gate element 3. The gate bore 4 has an inclined surface 77 providing the gate bore 4 with a varying radius in the axial direction of the gate bore.

[0067]The support member is arranged in the gate element 3 with the opening 44 encompassing the through bore 2 for receiving the elongated member and an expanded opening portion 70 which is open to the through bore 2 in the axial direction of the through bore. A reduced section 75 of the support member has an inclined surface 71, 72 which defines the expanded opening portion 70. The opening 44 has a decreasing radius along the reduced section in the axial direction of the support member toward a contact surface area 45 arranged at an end portion of the support member adjacent the cutting tool 46 at both side...

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Abstract

A gate valve assembly having a through bore adapted for fluid communication with a well bore and prepared for receiving an elongated member. The gate valve assembly comprises a gate element which is movably arranged in a gate valve housing, wherein the gate element has a gate bore arranged for receiving the elongated member, wherein a cutting tool is arranged in the gate bore first and second seats, wherein at least one of the first or second seat is arranged to provide sealing contact with a sealing surface of the gate element. A support member arranged with an opening encompassing the through bore and an expanded opening portion which is open to the through bore in the axial direction of the through bore, wherein a reduced section of the support member defines the expanded opening portion, and the opening has a decreasing radius along the reduced section in the axial direction of the support member toward a contact surface area arranged at an end portion of the support member adjacent the cutting tool, wherein the radius of the opening corresponds essentially to the radius of the through bore. The contact surface area is prepared for engagement with the elongated member and provides a counter acting area interacting with the cutting tool when shearing the elongated member. The invention also includes a method.

Description

[0001]The invention concerns gate valve assembly having a through bore adapted for fluid communication with a well bore and prepared for receiving an elongated member, as well as a method for shearing of an elongated member and moving the gate element into closing position.[0002]An elongated member as used in the application described herein includes well related tubular formed elongated members such as a tubing, coiled tubing, drill pipes used in work over, drilling, completion, production or intervention operations. The elongated member may also be a wire line or the actual tools to be used when carrying out well related operations.BACKGROUND OF THE INVENTION[0003]It is well know within the field to use a safety installment assembly such as for instance a Blow Out Preventer (BOP) or a LRP (lower riser package) in order to avoid a blow out from a well bore when a rapid shut down of the well is necessary, especially in an emergency situation.[0004]Various kinds of safety installment...

Claims

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Application Information

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IPC IPC(8): E21B34/02E21B33/06
CPCE21B34/02E21B33/06E21B29/08E21B33/063
Inventor MALONE, STEVESKEELS, HAROLD BRIANHOULGRAVE, BOBLAWSON, JOHN
Owner FMC TECH INC
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