RU1807208C - Throttle of blowout preventer equipment with manual and hydraulic control - Google Patents

Abstract

Usage: in manifolds of blowout control equipment used in drilling oil and gas wells. SUMMARY OF THE INVENTION: a throttle working chamber 5 is located between the piston seals 4, hydraulic control chambers 8 and 9 are located on both sides of the working chamber, the hydraulic cylinder is aligned with the housing 1, and the tip carrier 6 has a double power reserve. At the same time, the ends of the position indicator of the tip 7, combined with the sensor of the remote indicator, are the limiter of its progress. 1 s.p. f-ly, 1 ill ..

Description

The invention relates to the oil and gas industry, in particular to blowout manifolds used in the drilling of oil and gas wells.

The aim of the invention is to increase the reliability of both remote and manual control of an adjustable throttle while simplifying its design.

The goal is achieved in that the working chamber (the chamber in which the pressure of the working medium is regulated in a predetermined range) is located between the piston seals, and the hydraulic control chambers for closing and opening the throttle are located on both sides of the working chamber, while the hydraulic cylinder is aligned with the housing. the tip carrier has a double power reserve, and the end stop is the ends of the tip position indicator combined with the remote pointer sensor.

The design provides the ability to control the pressure at the inlet of the throttle in both hydraulic and manual operation. In this case, in the event of a malfunction of the hydraulic drive system, an emergency transition to manual control is carried out without any additional operations (unscrewing the stopper, screwing on the coupling, driving the stop nut all the way, etc.).

Without additional operations, the transition from manual control to

hydraulic

The position of the handpiece when using both manual and hydraulic actuators is determined by a round arrow cone, which is both a visual indicator of the position of the handpiece carrier and a remote indicator of its position (when hydraulically controlled).

Regardless of the type of actuator, a constant stroke value of the tip is achieved by using the right and left ends of the position indicator as a stop restricting the stroke.

Analysis of the applied design showed that the distinguishing features are not independent and cannot be used separately from the known features. In this regard, the search for known solutions was carried out in the entire population as a whole, and in the known solutions, a device having such a population was not found that in itself indicates significant differences to the criterion. In addition, the proposed solution informs the throttle of a new quality - the possibility of operational control in emergency situations without any readjustment.

In this case, the total effect is the total replacement of one type of control by another, whereas in the prototype it is impossible to close the throttle manually without driving the nut by idling the flywheel. Moreover, if the throttle was opened manually, it is also impossible to switch to hydraulic control without idling the flywheel.

The drawing shows a throttle with manual and hydraulic control in section.

The throttle consists of a housing 1, made in the form of a hydraulic cylinder, a carrier 2 nozzles 3, a piston 4, between the seals

0 of which a chamber 5 is located, having only translational movement, provided with an internal thread mating with the threaded part of the nozzle carrier 6, seals mounted on the piston, the nozzle carrier and nozzle carrier and delimiting the working chamber with control chambers 8 and 9 nor the handwheel 10 of the manual drive on the left end of the nozzle tip carrier,

0 of the housing cover 11, in the bores of which the left end of the tip carrier moves with the throttle pair position indicator in the form of a conical sleeve 12, the circular arrow on the left end serves as a visual indicator of the position of the tip carrier, and the cone part (with a difference in diameters, corresponding to the progress of the position indicator) - by the sensor of the remote indicator

0 (located on the throttle control panel).

The throttle operates as follows. zom.

Manual mode.

5 To increase the pressure of the medium at the inlet to the throttle, turn the handwheel clockwise. The carrier with the tip moves to the right and begins to block the nozzle opening, which creates additional hydraulic resistance and differential pressure at the inlet. The pressure value is controlled by a pressure gauge mounted on the "manifold, and the position of the throttling pair - by the position

5 round arrows in the slot of the housing cover. There is a decrease in pressure at the inlet with counterclockwise rotation of the handwheel. The full stroke of the tip is regulated by the stop of the left or right ends of the index cone sleeve in

housing cover. In the presence of pressure in the working chamber, the piston always moves to the left due to the significant difference in the left and right cross sections under pressure, which is compensated by the presence of the range of travel of the tip carrier.

Hydraulic remote control.

Since, according to the general safety rule, before starting through the throttle of the medium, it must be opened (if necessary, by turning the handwheel and monitoring by the pointer on the throttle or on the remote control), the transition to hydraulic control is carried out without additional operations.

To close the throttle (increase inlet pressure), hydraulic pressure is supplied from the control panel to cavity 1, while the piston with the tip carrier moves to the right, blocking the nozzle opening and increasing the differential pressure at the inlet; When pressure is applied to the control chamber 9, the piston with the tip carrier moves to the left, reducing the span. The pressure is monitored by a remote pressure gauge located on the remote control, and the position of the throttling pair is monitored by a remote indicator, the primary sensor of which is a tapered bushing.

The economic effect is created due to the possibility of reducing in the manifold the number of adjustable chokes with manual control.

The calculation is carried out according to the formula

Eg (C1 Sch-C2 P2) A, (1)

where ci is the cost of 1 number of chokes in the base manifold;

C2 - the cost and number of throttles in the new manifold.

And 200 is the annual volume of manifolds.

The initial data for the calculation are as follows:. “С1 1600 rub, Щ 4, 100 / - rub. P2

3 ..

Substituted the data in the formula {1), we obtain

Eg (1600 -4-1100 -3) -200 440,000 rubles.

Claims (2)

1. Throttle blowout control equipment with manual and hydraulic control, comprising a hollow body made in the form of a hydraulic cylinder with a piston and a cover forming a working chamber and hydraulic control chambers, a tip with an indicator of its position, a nozzle, tip and nozzle carriers, a flywheel and sealing elements characterized in that, in order to increase the reliability of the throttle during manual and remote control while reducing the size, the hydraulic control chambers are located in the throttle body along nye side of the working chamber, the tip is placed in the piston carrier, and a step is formed to cooperate with a pointer position Nako nechnika. 2. The throttle according to claim 1, characterized in that the tip position indicator is made in the form of a conical sleeve associated with a manual control wheel.