SU1559110A1 - Device for injecting mortar into well - Google Patents

Abstract

The invention relates to a device for injecting a solution into a well. The goal is to increase reliability by preventing it from sticking and penetration of the injection fluid into the annulus. The device includes a hollow body (PC) 1 with a stop 2 on the outer surface, a supply pipe 3 with a stop 4, telescopically mounted on PC 1, a stop pipe 5 with washing holes 6 and an elastic sealing element 7 mounted concentrically on PC 1 between it an anvil 2 and an anvil 4 of an inlet pipe 3. An anchor pipe 5 is connected to the PC 1 by a left adapter 8. The PC 1 is made in the form of a square rod, the upper part of which is installed in the inlet pipe 3 and has sealing elements 9. An inlet pipe 3 has an axial bore in the bottom sieva square section, the response section of the rod. In the upper part of the pipe 3 there is installed a pipe 11 with a junction 12 under the column of pipes 13. The pipe 11 is telescopically inserted into the supply pipe 3 and sealed therein. The upper part of the supply pipe 3 is equipped with a rotation assembly 15 consisting of a radial thrust bearing 16 and a cam connection (CS) 17. Element 7 has a spacer sleeve 18 with spring collets 19 and thrust washers 20. The thrust pipe 5 is made of easily-drilled material. With the emphasis on the bottom of the pipe 11, moving down, separates the COP 17 and puts the bearing 16 into the operating position, the elements 7 are expanded, separating the injection zone from the overlying part of the well. In order to prevent sticking of the string of pipe 13 during the injection of the solution, it can be rotated without relieving the axial load on the device. To remove the latter, the string of pipe 13 is pulled up by 2-3 tons above its own weight, the pipe 11 moves upwards and brings the COP 17 to the working position, and the element 7 assumes its original position. When turning the column of pipe 13 to the right there is a disconnection along the left adapter 8. The device is lifted to the surface. 2 hp f-ly, 6 ill.

Description

I ate

with

g scopically mounted on PC 1, thrust pipe 5 with washing holes 6 and an elastic sealing element 7 mounted concentrically on PC 1 between its abutment 2 and stop 4 of the supply pipe 3, Persistent pipe 5 is connected to PC 1 with a left adapter 8. PC 1 is made in the form of a square rod, the upper part of which is installed in the inlet pipe 3 and has seal elements 9. The inlet pipe 3 in the lower part has an axial hole of square cross section, the counter section of the rod. In the upper part of the pipe 3 there is a pipe 11 with a junction 1 under the column of pipes 13, the pipe 11 is telescopically inserted into the inlet pipe 3 and sealed in it. The upper part of the inlet pipe 3 is equipped with a rotation node 15 consisting of a radial thrust bearing .16 and cam joint (CS) 17. Step 7 has a spacer sleeve 18 s

The invention relates to the mining industry, and more specifically to the construction of wells, and can be used in cementing wells or other mine workings,

The aim of the invention is to increase the reliability of operation by preventing its sticking and penetration of the injection fluid into the annular space.

Fig 1 1 shows the device in the transport position; FIG. 2 is a section A-A in FIG. Fig 3 - section BB in Fig 1 | in fig. 4 - the device is in working position; on Fig - section aa on Fig; in fig. 6 is a section bB in FIG. 2,

The device includes a hollow body 1 with a stop 2 on the outer surface, a supply pipe 3 with a stop 4, telescopically mounted on the case 1, a stop pipe 5 with washing holes 6 and an elastic sealing element 7 mounted congently on the case 1 between its stop 2 and the stop 4 of the inlet pipe 3. The stop pipe 5 is connected to the body 1 by the left adapter 80 The body 1 is made in the form of a square rod, the upper part of which is mounted

spring grips 19 and thrust washers 20 o. The thrust pipe 5 is made of easily drilled material. With the emphasis on the bottom, the pipe 1, moving down, separates the COP I7 and places the bearing 16 into the working position, expands the elements 7, separates the solution injection zone from the overlying part of the well. To prevent the pipe string 13 from sticking, it can be rotated without removing the axial load on the device. To remove the latter, the I3 pipe string is stretched 2-3 t above its own weight, the pipe 11 moves up and brings the COP 17 to the working position, element 7 takes its initial position and turning the pipe string 13 to the right, a detachment takes place along the left adapter В, the Device is lifted to the surface "2 З.п" f-ly, 6 or "

0

five

0

five

0

five

in the supply pipe 3 and has sealing elements 9 The supply pipe 3 in its lower part has an axial bore 10 of square section, the counter section of the rod0

t

In the upper part of the supply pipe 3, a pipe 11 is installed with an assembly 2 for pipe columns 13. The pipe is telescopically inserted into the supply pipe 3 and sealed in it by seals 4 The upper part of the supply pipe 3 is equipped with a rotation assembly 15 consisting of radial thrust bearing 16 and cam connection 17 (FIG. 2) o The sealing element 7 has a spacer sleeve 18 with spring collets 9 and thrust washers 200 The thrust pipe 5 is made of easily drillable material

The device works as follows.

The device is lowered into the well before reaching the bottom of the anvil pipe 5. For - the part of the weight of the string of pipes 13 (drill pipes, tubing pipes and t, D) is unloaded onto the device, while the pipe 11, moving down, disconnects the cam connection 17 (Fig. 05, section A - A)

515

and places the bearing 1b in working position, the telescopic square rod-housing 1 enters inside the inlet pipe 3, thereby compressing the sealing elements 7, which increase in diameter, separating the injection zone from the overlying part of the well, the spring collets 19 unclamping and their ends they are inserted into the walls of the well, preventing the cranking of the sealing elements 7, while the device rotates during the cementing works and waiting for the cement mortar to harden.

In order to prevent sticking of the string of pipe 13 during the injection of the solution and RPF, it can be rotated without removing the axial load on the device. After the end of RFQ, the device is removed from the well as follows.

The pipe string 13 is tensioned by 2-3 tons higher than the pipe's own weight, while the pipe 11 moves upward and brings up the cam connection 17 (FIG. 2, section A-A), the telescopic rod-body 1 moves downwards , while the sealing elements 7 and the spring collets i 9 take their original position (transport position), then, turning the string of pipes 13 to the right, the cams of the rotation unit 15 engage, and then turn the device off from the stop pipe 5 in the left adapter 8. After this production d t lift the device. Cemented stop pipe 5 remains in the well ;,

If necessary, the cement cup and thrust pipe are drilled; if the work does not require prolonged maintenance of the injection pressure of the plugging solution in the required injection mode, the device is removed from the well immediately after the completion of the injection of the solution. quality cement cups and the possibility of partial penetration of the solution into the reservoir "

106

The proposed device for injection of the solution into the well allows to perform isolation works under excessive pressure, increase or decrease the pressure in the cemented zone during the whole time of RFQ and with different trunk configurations, different depths of the well, and increase the reliability of cementing work.

Claims (2)

Invention Formula 1 o A device for injecting a solution into a well, comprising a hollow body with an emphasis on the outer surface, an inlet pipe with an emphasis, a telescopically mounted body, an anchor pipe with washing holes and an elastic sealing element mounted concentrically on the housing between its anvil and the stop tube, characterized in that, in order to increase the reliability of operation by preventing it from sticking and penetration of the injection fluid into the annulus, it is equipped with a left adapter and a housing with a connection unit for a pipe string, the housing is connected to the support pipe by a left adapter n made in the form of a square section rod, the upper part of which with a seal is installed in a supply pipe made in its lower part with an axial bore with a cross section corresponding to the outer surface of the rod The pipe is installed with a seal coaxially in the upper part of the supply pipe with the possibility of transmitting rotation and axial force to the latter with the extreme and lower layers x, respectively. 2. A device according to claim 1, characterized in that the retaining pipe is made of easily drilled material. 3 A device according to claim 2, characterized in that the elastic sealing element has a spacer in contact with it with spring collets. fi & 3 Phie. FIG. at