SU1258982A1 - Rack for determining the value of contact pressure ,particularly, of blowout preventer disks - Google Patents

Abstract

The invention relates to the field of petroleum engineering and is intended to improve the accuracy of determining the magnitude of the contact pressure of the preventer dies. For this, the stem (W) 17 installed between the dies 28 of the preventer has a bushing (B) 19 in the measuring channel 19. One end B 19 interacts with one of the dies 28. An annular groove is made on the inner surface of the measuring channel on the side of this end 21, communicating with a drain channel 22. During the test, the pressure is released from the cavity 17 of the cavity 17 into the cavity of the compensator. When the seal (V) 29 is detached from W 17 in the area of the B 19 face, the liquid enters the annular groove 21, then into the channel 22. The value of the stabilized pressure in the contact zone У 29 with the hole 23 В 19 will correspond to the contact pressure У 29 с Ш 17 в the location of the 19. 2 Il. i (O 18 2S 29 ic sd 00 with 00 Yu Figure 2

Description

one

This invention relates to petroleum engineering, in particular for testing spot preventers.

The aim of the invention is to improve the accuracy of determining the magnitude of the contact pressure.

FIG. Figure 1 shows a hydraulic diagram of a spot preventer test bench; in fig. 2 - unit for measuring contact pressure.

The preventer is assembled by the die 28 to be tested and is installed on the stand, after which the fingers 24 and the stops 27 move the movable pin 17 so that the coordinates of the holes 23 when the plates close will coincide with the point on the surface of the seal 29. 17, the pressure from the hydraulic control 14 is supplied to the closing cavity 15 of the preventer.

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Stand for testing preventers condition-10 Then, on the control panel 8 pump

The installation closes valve II and 13 and opens valve 9. Next, the pump 5 is turned on. When the gauge 10 is stabilized, the pump 5 is turned off, the valve 9 is closed and the valve 11 is opened. Thereafter, pumps 4 and 5 are turned on. When the gauge 12 readings reach a certain value ( MPa), the pumps 4 and 5 are turned off, the valve 11 is closed. By means of the valve 13, the pressure is released through the holes 20 of the movable brush 17 and the holes 23 of the sleeve 19. Next, the seal separates from the stem in the area of the end face of the sleeve 19, fluid or air enters the annular gap 21, then into the drain channel 22. The reading of the pressure gauge 12 is reduced until the pressure in the compensator and in the contact zone of the seal 29 with the opening 23 of the sleeve 19 is equal, after which the reading of the pressure gauge 12 does not change. This indication will correspond to the contact pressure of the compactor 29 with the movable syringe 17 at point 23.

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IT from the cab 1 for the location of the test object in which the pressure compensator 2 is located, consisting of a tank, the lower part of which communicates with the high pressure line connected to the pumping unit 3, consisting of high pressure pumps 4 and low pressure 5, which is intended to supply fluid from the tanks to the cavity of the test object and to the inlet of the high-pressure pump 4.

The tank 6 is connected to the pump 5 and the cabin 1 through a filter 7. The control panel 8 of the pump unit 3 contains a valve 9 and a pressure gauge 10 on the line intended for filling the fluid, a valve 11 and a pressure gauge 12 on the high pressure line, pressure relief valve 13.

The hydraulic control of the preventer plates 14 is connected to the closing 15 and opening 16 cavities of the preventer.

A movable rod 17 interacting with protective strips 18 is installed between the preventer dies, and the movable rod 17 with the measuring channel and the drain rod is equipped with a sleeve 19, the cavity of which is connected to the pressure line of the measuring unit 20. The outer surface and transverse hole of the rod form an annular gap 21, communicating with the drain channel 22. The opening 23 of the sleeve 19 and the annular gap 21 formed by a groove on the inner surface of the measuring channel exit into the contact zone of the seal with the movable stem 17.

The coordinates of the hole 23 are changed along horizontal planes with the help of fingers 24, which sit in the holes of the bar 25, 45 fixed to the movable rod 17. The fingers 24 are mounted in the holes of the housing flange 26 when installing the rod 26. In the vertical direction the coordinates of the hole 23 vary with stops 27 made to a certain size.

The diameters of the hole 23 of the sleeve 19 and the width of the slot 21 embedded in the wall of the movable rod 17 are chosen so that when the seal is deformed, it is not pressed into the nipple.

Tests are performed as follows.

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Next, the valve 13 is closed, and the pressure from the hydraulic control 14 is supplied to the opening cavity 16 of the preventer, the stem 17 is reset with the help of a finger 24 and the stop 27 to the corresponding coordinates, the die 28 is closed by hydraulic control, the valve 11 is turned on, the pumps 4 and 5 are turned on and liquid is pumped - 40 bone from tank 6 to compensator 2. When the pressure gauge reaches about 100 MPa, pumps 4 and 5 are turned off, valve I1 is closed, and the process of determining contact pressure is repeated.

Claims (2)

Invention Formula A bench for determining the magnitude of the contact pressure mainly of the preventer dies, including measuring and pumping units, mounted between the preventer dies with the possibility of axial movement of the rod with the measuring and drain channels connected respectively to the measuring and drain lines of the stand, characterized in that To increase the accuracy of determining the magnitude of the contact pressure, it is equipped with a sleeve 1258982 installed in the measuring channel of the rod. The preventer is assembled by the die 28 to be tested and is installed on the stand, after which the fingers 24 and the stops 27 move the movable pin 17 so that the coordinates of the holes 23 when the plates close will coincide with the point on the surface of the seal 29. 17, the pressure from the hydraulic control 14 is supplied to the closing cavity 15 of the preventer.  Then, on the remote control 8 pump Next, the valve 13 is closed, and the pressure from the hydraulic control 14 is supplied to the opening cavity 16 of the preventer, the stem 17 is reset with the help of a finger 24 and the stop 27 to the corresponding coordinates, the die 28 is closed by hydraulic control, the valve 11 is turned on, the pumps 4 and 5 are turned on and liquid is pumped - bone from tank 6 to compensator 2. When the gauge reading reaches about 100 MPa, the pumps 4 and 5 are turned off, the valve I1 is closed, and the process of determining the contact pressure is repeated. 45 Invention Formula A bench for determining the magnitude of the contact pressure mainly of the preventer dies, including measuring and pumping units, mounted between the preventer dies with the possibility of axial movement of the rod with the measuring and drain channels connected respectively to the measuring and drain lines of the stand, characterized in that To increase the accuracy of determining the magnitude of the contact pressure, it is equipped with a sleeve 1258982 3 installed in the measuring channel of the rod. This end, one end of which interacts on the side of this end is made of one of the preventer plates, and on the internal groove, which is connected to the drain channel of the surface of the measuring channel with the floor. Editor P. Cossey Order 5099/32 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk iab., 4/5 Branch PPP "Patent, Uzhgorod, st. Projects, 4 Compiled by I. Cap Tehred I. VeresKorrektor I. Erdeyi Circulation 548 Subscription