SU1490246A1 - Valve - Google Patents

Abstract

The invention relates to the drilling of oil and gas wells and is intended to block the transition pipe of the pipe from the forward or reverse flow of fluid under the action of differential pressure. The purpose of the invention is to increase the reliability of work when expanding technological capabilities. The valve includes a housing 1, a double-sided landing element in the form of an elastic split metal washer 8 and a rubber-metal diaphragm 7 and rubber seat 11 mirrored to each other mirror-sided to each other. The valve is sealed from a direct and reverse flow of fluid using a waste metal ball. It has a movement limiter made in the form of a sleeve 16. Spring washer relative to the body 1. The washer 8 can be made as a rubber washer 12 with sector notches 13, in which the metal sectors 14 are primed. the ball enters the saddle 11 with the landing on the washer 8, it closes the channel of the drill pipe from the reverse flow of fluid. At the same time, the pressure in the well grows and, when the calculated value is reached, the ball is pushed through the washer 8 to the upper position, forming a forward valve. If it is necessary to change the working pressure, the washer 8 is replaced with another and a new valve is lowered on the tool into the well. 1 hp ff, 8 ill.

Description

The invention relates to the drilling of oil and gas wells and is started to block the transition channel of pipes from a direct or reverse flow of fluid under the action of a switch on a certain number of chips,

 1e :: iz from brotepi - increase of reliability of operation with the expansion of technical- P1) A; h and easy valve night capabilities.

On the pig. 1 schematic diagram of the valve, RPND; .h ;; FIG. 2 - section A-A pas I jHr. one; pas figs. 3 - landing emeg to: K1; pna with a CBL-pxy niapi iM; in fig. 4 - the same, from the opening 11mtsim his bottom ball; FIGS. 5 and b are a puck, option T1.1 and execution; pas figs. 7 - upper ichinomegallicheskaya diaphragm; on fit- 8 - DIG1FRG bottom metal metal; um

K.chaiai consists of case 1, at the ends of which are inutry and outside you- 1: o: n-; ia are threads 2 and 3. Internal taper thread 2 turns into a double pe3ii6y -4, into which twists i and iiiKii 5. The same nut 5 sets the Hcpxtiee rubber seat 6, the upper rubber-metal / n-1ch diaphragm -ia 7, the metal washer with a slit 9 installed mirror j .epxHiiN: - bottom rubber metal-diaphragm 10 and lower rubber-BOt- saddle 1 1. In order to eliminate the leakage of rubber of the saddle 11 into the cut 9, the washers 8 were cut and the cut 9 of the diaphragm 7 and 10 was made in the form of rubber washers 12 with sector notches 13, in which metal

iiiecTb) sectors 14. Rubber metal diaphragms 7 are located so that one of the sectors 14 overlaps the incision 9 of the metal split ball 1. 8. The cut 9 of the valve split disc 8 is made either in parallel (Fig. 5) or at an angle to axis, or in the form of a stepped locking resolution of 3 a (fi g. 6).

The sealing of the valve from the direct and reverse flow of a fluid is achieved with a help, and a waste metal ball 15.

, 1p, the elimination of ablation down the ball 15 under the saddle 11 sets the limiter for moving the ball 15, consisting of a spacer sleeve 16, in the slot 17 of which, by means of the ribs 18, a centralizer 19 with inserted hollow rod 20 fitted with a spring 2 1 is installed.

The valve operates as follows.

The housing 1 with all the details, except the ball 15, assembled and fixed by the nut 5, is installed above the chisel (if necessary, in any place) and goes down into the well, where, to the extent necessary, works are performed that do not require overlapping the drill pipe channel, for example while drilling (Fig. 1). Ulap 15 is thrown into the drill pipe but as necessary to perform a particular process operation.

If, for example, there is a need to determine reservoir pressure, the flushing (or drilling) stops, the square bar turns back and into the drill pipe) uiap 15. Zide to the top

the saddle 6 and the diaphragm 7, the ball 15 sits on a split metal washer 8, forming a straight valve (Fig. 3).

After determining by pressure that the ball 15 is installed in the saddle 6, the preventer is closed and a fluid with a density lower than that of the drilling fluid (for example, water) is pumped into the annulus. As water is pumped into the annulus, the pressure in the wellbore will increase at the wellhead. Excessive pressure at the wellhead, the magnitude of the water column in the annulus and the magnitude of the mud column in the annulus, determine the formation pressure by calculation.

After conducting studies to determine reservoir pressure with cutting off a column of drilling fluid in pipes from a fluid, the flow in the annulus requires flushing the well by direct circulation to remove the water and formation fluid that entered the wellbore during the test.

For this purpose, excess pressure known in magnitude is created in the drill pipes, under the action of which the ball 15 is forced through the metal / then split washer 8 and sits on the hollow rod 20, which limits its further movement. When punching the shchara 15 through the split washer 8, the existing slit 9 increases in cross section, ensuring that the ball 15 passes. metal sectors 14, which, as the pressure rises to the same extent, are pressed against the split plate 8, completely blocking the cut 9 and excluding the leakage of rubber 6 in cut 9. The final sealing of the valve bore is completed by one of the rubber seats (6 and 11),

The rod 20, fixing the ball 15 along the axis of the housing 1 and pressing it with the spring 21 to the lower seat I1 and further to the split washer 8, forms a check valve (Fig. 4).

To transfer a non-return valve to a straight line, the wellhead should be sealed with a preventer and the drilling fluid supplied (with a cementing unit or a drilling pump) to the annulus.

At the same time, the spring 21 and the upward flow of fluid will provide an approach ball.

15 in the lower rubber saddle 11 with the landing on the split washer 8 and overlapping the channel of drill pipe from the reverse flow of fluid. The pressure in the well will increase after this

reaching the calculated value, the ball is pushed through the split washer 8 to the upper position, forming a forward valve.

The pressure at which the valve moves from the forward position to the reverse position or vice versa is set in advance for technological reasons and is ensured by the installation of an appropriate split washer.

At the next lifting of the drilling tool from the well, the valve parts are audited, and if necessary, the working pressure is changed to replace the split

washer; on the other, a new valve is launched on the tool into the well with or without a ball, depending on the task.

Claims (1)

Invention Formula 1, a valve comprising a housing, a two-way seat under throw ball and mounted under the landing element ball movement, characterized in that, in order to increase reliability while expanding technological capabilities, double-sided landing element is made in the form of an elastic split metal washer and rubber-metal diaphragm mirrored to each other installed on its face sides rubber seat, and the ball movement restrictor is made in the form of a spring-loaded sleeve, 2, the valve according to claim 1, characterized by the fact that the rubber metal diaphragm is made in the form of a rubber ring with sector notches and metal sectors prigumirovanny in them, and the rubber metal diaphragms are installed with the possibility of blocking the cut elastic Metal washers from the rubber-metal diaphragm sector. /eight Phase 3 phage. five Phage. 6 FIG. 7 P FIG. eight