SU1234584A1 - Blowout preventor plate - Google Patents

Description

The invention relates to oil field equipment, in particular for use in preventers designed to seal a mouth for surface and underwater drilling of oil and gas wells.

The aim of the invention is to improve the reliability of sealing due to uniform deformation in the zone of interaction of wedges with segments.

FIG. 1 shows the preformer die assembly; in fig. 2 - preventer die sealing element; in fig. 3 - structural elements of the preventer plate; in fig. 4 - plate segment; in fig. 5 - wedge dies; in fig. 6 is a scheme for sealing large diameter pipes; in fig. 7 is a scheme for sealing small diameter pipes of a preventer.

The preventer die consists of body 1, liner 2, made in the form of two half-rings and sealing element 3, armor I, with metal fittings.

The preventer die body 1 is a half-ring having a T-groove on the outside for connecting to the die driving hydrocylinder rod (not shown), and a protrusion 4 in the middle part on the inner surface. the plane of the connector dies. The width of the protrusion is equal to the working middle part of the sealing element. From the top and bottom of the projection, an arcuate along sa of the sealing element is placed.

The sealing element 3 has a working part 5 in the form of a semiring, and its diameter corresponds to the diameter of the largest sealable pipe, and two arcuate 6 on the outer side to seal the annulus of the well. The height of the working part of the sealing element is located in the middle between the two arcuate ones themselves 6 and is reinforced with metal fittings made in the form of wedges 7 and 8 segments 9 with brackets. On the back surface opposite to the working one, there is a smaller protrusion 10 in width.

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tfi

20

25

The sealing element is necessary for the flow of elastic material when sealing pipes of smaller diameter.

Wedges 7 and 8 and segments 9 are located symmetrically to the longitudinal axis of the slab and interact with each other side surfaces, the wedge 8 with a narrow part directed towards the sealable pipe and turned to the left and right of the central axial wedge 7 and their axes of symmetry form with the axis of the central wedge is the angle 1e6 directed toward the connector of the plate and is installed between the segments 9. The segments 9 have bevels on the back surface at an angle of 45 to the line of the plate die, interacting with the bevels of the projection of the plate body 1.

The armature does not protrude beyond the die connector line. The side surfaces of the arcuate bodies are bent away from the injection of elastic material when exposed to well pressure by brackets 11 resting on the surface of the segments 9.

Preventer installs two dies (not shown),

When sealing a pipe of the largest diameter for a given size of the die, it works as follows.

When exposed to the actuator hydraulic cylinders, the plates move in the preventer housing to the pipe being compacted towards each other. As a result, the plates are in contact with the frontal planes of the sealing element 3 and then with the outer straight planes of the segments 9, and the working part covers with its surface a sealing tube. Moreover, the material of the sealing element 3 5 is not squeezed out along the pipe axis when exposed to well pressure, being protected by the plates 12 of the wedges 7 and 8 and segments 9 The elastic material of the arcuate boards 6 is compressed between the surfaces of the preventer body and the die body 1 due to prestressing , the same seal the annular space. Moving a plate 30

35

40

50

than the width of the working part. Moreover, the service is terminated.

free space formed by the seam

of the width of the protrusion of the body of tshashka 1 and the protrusion on the back surface

diamtra for this plate size it works as follows

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0

five

sealing element, it is necessary for the flow of elastic material when sealing pipes of smaller diameter.

Wedges 7 and 8 and segments 9 are located symmetrically to the longitudinal axis of the plate and interact with each other side surfaces, with the wedge 8 narrowly directed towards the pipe being compressed and turned to the left and right of the central axial wedge 7 and their axis of symmetry form with the axis of the central wedge angle 1e6, directed toward the die connector, and installed between segments 9. Segments 9 have bevels on the back surface at an angle of 45 to the connector line of the die, interacting with the bevels of the protrusion of the die body 1. I

The armature does not protrude beyond the die connector line. The side surfaces of the arcuate bodies are bent away from the injection of elastic material when exposed to well pressure by brackets 11 resting on the surface of the segments 9.

Preventer installs two dies (not shown),

When sealing the pipe of the largest diameter for a given size of the plate, it works as follows.

When exposed to the actuator hydraulic cylinders, the plates move in the preventer housing to the pipe being compacted towards each other. As a result of this, the plates touch the front planes of the sealing element 3 and then the outer straight planes of the segments 9, and the working part covers the sealing tube with its surface. Moreover, the elastic material of the sealing element 3 is not squeezed out along the pipe axis when exposed to well pressure, being protected by plates 12 of wedges 7 and 8 and segments 9. The elastic material of arcuate boards 6 is compressed between the surfaces of the preventer body and the die body 1 due to preload. , the same seal the annulus. Move flat

diamtra for this size plate, it works as follows.

When exposed to the actuator hydraulic cylinders, the dies move towards each other. As a result, the plates touch the front planes of the sealing element 3 and then the outer planes of the segments 9, between the working parts 5 of the sealing element 3 and the pipe there is a gap equal to the difference between the diameters of the largest and smallest sealed pipes divided in half on each side. Thanks to this dies continue to come closer. The bevels on the protrusion 4 of the body of the die 1 act on the contact surface on the bevelings of the segments 9 and force the latter to move to the surface of the pipe being sealed, and on the central axis the body of the die acts on the central axial wedge 7 and causes it also to move to the surface sealing 3844

my pipe At the same time, the segments 9 with lateral surfaces interact with the surfaces of the inclined wedges 8, causing the latter to turn around their axes and approach the surface of the pipe being sealed. In this case, the movements of the central wedge 7 and the segments 9 are equal and ensure uniform and uniform movement of the elastic material to the surface of the pipe being sealed at the point of interaction of the segments with the wedges, tightness is ensured at the places of the die connector.

When the pipe is covered by all movable elements, the elastic material cannot be inserted along the pipe axis when exposed to well pressure as it is protected by plates 12 of wedges 7 and 8 and segments 9. The movement of the die stops.

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FIG. four

fig 5

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FIG.

Editor I. Gorvat

Compiled by I. Kepke Tehred O. Sopko

Order 2962/39 Circulation 548 Subscription

VNIKLI USSR State Committee

for inventions and discoveries 113035, Moscow, F-E5, Raushsk nab., 4/5

Production and printing, enterprise, Uzhgorod, st. Project, 4

ig.7

Proof-reader I. Erdeyi

Claims (1)

THE PREVENTOR DIE, consisting of a housing, a liner and a seal, is located at an angle to the axis of the central plane of the connector, so that with the aim of the element reinforced with brackets placed in the plane of the connector with segments and central and side wedges installed with the possibility of interacting with segments and having axes of symmetry under the bottom and increasing the reliability of sealing pipes of different diameters due to uniform deformation in the zone of interaction of wedges with segments, the angle formed by the intersection of the d symmetry of the central and lateral wedges directed toward the connector plates. <Put. 1