SU1550090A1 - Double-acting hydraulic jar - Google Patents

Abstract

The invention relates to the oil and gas fields and can be used to eliminate pipe sticking in wells. The goal is to simplify the construction of ssa. For this, the piston 6 is made in the form of two consecutive sleeves 3 and 4, each of which has a hydraulic time relay. The jar is equipped with a rod 2, on which an annular protrusion 5 is made between the limiters. The bushings 3 and 4 are located on different sides of it. Limiters rod 2 have grooves to form a hydraulic channel when the constraints interact with bushings 3 and 4 of the piston 6. When the hydraulic time relay is triggered, the sleeve 3 of the piston 6 enters the hole of the hollow body 1, the oil instantly flows through the annular gap between the body 1 and the sleeve 3. The movement of the rod 2 upwards is sharply accelerated and a contact impact of the protrusion of the rod 2 and the protrusion of the housing 1 occurs, which is transmitted to the stuck equipment and releases it. 3 il.

Description

Sh

YU

(L

 L

H

ate

with

annular protrusion 5. The sleeves 3 and 4 are located on different sides of it. Limiters rod 2 have grooves for the formation of a hydraulic channel in the interaction of the limiters with the sleeves 3 and 4 of the piston 6. When the hydraulic time relay is triggered, the sleeve 3 of the piston 6 goes into the groove of the hollow body 1, oil

The invention relates to the field of the oil and gas industry and can be used to eliminate pipe sticking in the well by shock loads.

The purpose of the invention is to simplify the design of a double-acting hydraulic actuator.

FIG. 1 shows a hydraulic circuit diagram} in FIG. 2 - section A-A in FIG. C on fig.Z - section BB in figure 1.

The hydraulic ss contains (see Fig. 1) a hollow body 1 with annular grooves on the inner surface, a rod 2 mounted therein, a piston of two bushings 3 and 4 forming an annular throttling gap with the rod, a sleeve rigidly attached to the rod, forming an annular protrusion 5, the floating piston 6, the upper 7 and the lower 8 end adapters. The plug 9 serves to close the opening through which the hydraulic chamber, formed by the body and the stem and consisting of the upper and lower e sections, is filled with technical oil. The sealing of mobile and fixed joints is carried out with rubber rings 10 of circular cross section. On rod 2, upstream and downstream of the piston hubs of 3.4 pistons, are made stops «and 5c with longitudinal grooves (see Fig. 3) for the flow of working fluid and the formation of channels when the stops interact with the piston bushings. Each of the sleeves 3 and 4 of the pistons has a hydraulic time relay B and g, made in the form of a rectangular threaded channel or hole with a very small cross-sectional area. Moreover, the response time of the hydraulic time relay g of the lower sleeve 4 pistons is twice as long,

instantly begins to flow through the annular gap between the housing 1 and the sleeve 3. The movement of the rod 2 upwards is sharply accelerated and the contact impact of the protrusion of the rod 2 and the protrusion of the body 1 occurs, which is transmitted to the stuck equipment and releases it. 3 il.

than the response time of the hydraulic time relay b of the upper part 3. This makes it possible, if necessary, to exclude the impact of a downward impact. The hollow body 1 and the rod 2 have splined engagement (see Fig. 2) for transmitting torque,

have also protrusions}

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five

0

five

0

five

0

five

tsi k, l for contact shock (see Fig.1), forming anvils and drummer.

Hydraulic ss works barely. blowing way.

The adapter 7 is connected to the drill or tubing, and the adapter 8 is connected to the threaded elements, the counter-threaded element of the stuck equipment, and the cc is lowered into the well. Upon reaching the stuck equipment, the thread of the threaded elements, lowered with ss and the stuck equipment, are screwed together by rotating the tubing string. Then, by tensioning the pipe string, a tensile force is created, under the action of which the rod 2 and the annular protrusion 5 begin to move upwards, the annular protrusion 5 with the rubber sealing ring 10 is pressed against the upper piston bushing 3 and begins to move it upwards. Oil from the upper section j of the chamber begins to flow through the hydraulic time relay and the annular gaps between the annular protrusion 5 and the hollow body 1 and between the rod 2 and the lower piston hub 4 into the lower section e of the chamber. After the activation time of the hydraulic relay b, the upper piston bushing 3 enters the groove of the hollow body 1, the oil instantly begins to flow through the annular gap between the casing 1 and the piston bushing 3. The movement of the rod 2 upwards is sharply accelerated and a contact impact of the protrusion on the rod 2 and the protrusion and occurs.

corpus 1, which is transferred to the irihvah to the equipment and frees it.

To make a blow directed downwards, the weight of the pipe string on the SS creates a compressive load, under the action of which the rod 2 with the annular protrusion 5 begins to move downwards, the annular protrusion 5 with the rubber sealing ring 10 presses against the lower piston bushing 4 and begins to move it down . Oil from the lower section of the chamber begins to flow through the hydraulic time relay k-and annular gaps between the annular protrusion 5 and the housing 1 and between the rod 2 and the upper piston bushing 3 into the upper section of the chamber. After the activation time of the hydraulic relay g, the lower piston bushing 4 enters the bore of the housing 1, the oil instantly begins to flow through the annular gap between the housing 1 and the piston bushing 4. The movement of the rod 2 downward is sharply accelerated and a contact impact of the end face l of the adapter 7 on the upper end of the housing 1 takes place, which is transmitted to the stuck equipment and releases it.

If the stuck equipment could not be released with one blow, then they create a series of shots directed up and down until the stuck equipment is completely released. If blows directed downward are not required, then after the time of operation of the hydraulic relay of the upper piston bushing, the compressive load on the SS ceases.

Yass is recharged, but the downward impact will not occur, since the response time of the hydraulic relay of the lower piston bushing in

two times longer than the response time of the upper bushing hydraulic relay. To make an upward impact on ss, a tensile force is created by pulling the pipe string. In order to repeat the upward impact on ss, they again create a compressive load, recharge it,

then a tensile force is created on the CC until it is triggered. Thus, a series of upward strokes are carried out until the stuck equipment is completely released.

Claims (1)

Invention Formula Hydraulic ss dual action, comprising a hollow body with upper and lower anvil and two annular grooves on the inner surface, telescopically mounted in the housing cavity and 5 forming with it a chamber filled with oil, a rod with a drummer and limiters successively placed on it and mounted with the possibility of axial movement of the por- An axle located in the cavity of the housing between the stem delimiters and forming an annular throttling gap with the stem walls, characterized in that, in order to simplify the design of the SSA, the piston is made in the form of two consecutive sleeves, each of which has a hydraulic time relay, on the rod between the limiting bodies there is an annular protrusion, and the piston bushings are located on different sides of it, while the stem stops have longitudinal grooves to form a hydraulic channel when the limiting interaction Chitel with five five piston bushings.