RU77635U1 - DEVICE FOR OPERATION IN OPEN WELLS OF WELLS - Google Patents

Abstract

The device can be used to study open boreholes with hydraulic pressure with the installation of a packer, for several reinstallations of the packer in the well, for subsequent injection of insulating fluid into the reservoir. The device includes a packer (1), a hydraulic anchor (2) with spring loaded crackers (13) and a valve block (2). The packer (1) contains a hollow shaft (4) with multidirectional threads (5) and (6), an anchor with crackers (7), seals (8), a locking mechanism (9), made with multidirectional threads (10) and (11) . The valve block (3) consists of an inner (15), an outer (17) body and a shut-off valve (23). The inner (15) and outer (17) cases are separated by a movable sleeve (19). Holes (16), (18), (20) are made in the inner (15), outer (17) cases and the movable sleeve (19). The movable sleeve (19) is rotatable relative to the axis of the hollow shaft (4), has a shaped groove (21) and is spring-loaded with a spring (22). The shut-off valve (23) is placed in the inner casing (15) and is interfaced with the movable sleeve (19) by a finger (26). The finger (26) has the ability to move along the curly groove (21) along the axis of the hollow shaft (4) from the middle position to the extremely lower and extremely upper. When placing the finger (26) in the figured groove (21) in the middle and extremely low position of the hole (20), (18), (16) in the movable sleeve (19), in the outer (17) and inner (15) cases do not match and when placing the finger (26) in the figured groove (21) in the extremely upper position of the hole (20), (18), (16) in the movable sleeve (19), in the outer (17) and inner (15) cases are the same. The technical solution of the device ensures the reliability of its work and extends the functionality of the work, 6 il.

Description

The utility model relates to the oil and gas industry and can be used to study open boreholes with hydraulic pressure with the installation or several reinstallations of the packer in the well and subsequent injection of insulating fluid into the reservoir.

Known packer comprising a shaft, sub connected to the shaft, a mechanical anchor with spring-loaded crackers and control fingers placed in curly grooves, stops and a sealing element installed between the stops, RU No. 2208128 C1, E21B 33/12, 2003.07.10.

A device for isolating a formation is known, comprising a housing, guiding jet nozzles and a locking ball, and provided with bypass channels connecting the internal cavity of the device with guiding jet nozzles, RU No. 2312972 C2, Е21В 33/13, Е21В 43/114, 2007.12.20.

Known interval packer device containing longitudinally located upper hydromechanical and lower hydraulic packers with seals, as well as a double-acting valve assembly located between the packers and hydraulically connected to the lower packer through the in-pipe and annular spaces, RU No. 50247 U1, E21B 33/12, 2005.12 .27.

Known packer containing a hollow shaft with multidirectional threads, an anchor with crackers, seals, a locking mechanism made with a transport and locking nut with multidirectional threads, mating threads of the hollow shaft, RU No. 54392 U8, E21B 33/12, 2006.06.27.

This technical solution was adopted as the "closest analogue" of this utility model.

The “closest analogue” packer provides a secure hold when working with high pressure, however, the use of the “closest analogue” packer is individual.

The present utility model is based on the solution of a problem that makes it possible to obtain a device for reliable operation in open wellbores while expanding the functionality of the work performed.

According to a utility model, this problem is solved due to the fact that the device for working in open trunks includes a packer containing a hollow shaft with multidirectional threads, an anchor with crackers, seals,

locking mechanism made with transport and lock nuts with multidirectional threads, mating threads of the hollow shaft.

The device contains, functionally connected with each other and with the packer, a hydraulic armature with spring loaded crackers, and a valve block consisting of an inner and outer housing with openings made in each of them, separated by a movable sleeve containing openings of the same type of openings in the inner and outer casings, made with the possibility of rotation about the axis of the hollow shaft, having a figured groove and a spring-loaded spring relative to the outer casing, and from a shut-off valve with seats for throw balls, placed in the inner case coaxially with the hollow shaft and paired with a movable sleeve by a finger that can move along the curly groove along the axis of the hollow shaft from the middle position (with the transport position of the device) to the lowest (with the shut-off valve closed, with the fluid pressure in the device and at extended spring loaded crackers of the hydraulic anchor) and to the very upper (with the shut-off valve open and in the absence of fluid pressure in the device), while placing the finger in the middle groove in the middle and the lower position of the hole in the movable sleeve, in the outer and inner cases do not match, and when placing the finger in a curly groove in the extremely upper position of the hole in the movable sleeve, in the outer and inner cases match.

The applicant has not identified sources containing information about the technical solution that is identical to the characteristics given in the formula of this utility model, this determines, according to the applicant, the utility model meets the criterion of “novelty”.

The essence of the utility model is illustrated by drawings, which depict:

figure 1 - Device for working in open wellbores (section);

figure 2 - Node A (Packer) in figure 1;

figure 3 - Node A in figure 2;

figure 4 - Node B (hydraulic anchor) in figure 1;

figure 5 - Node B (valve block) in figure 1;

figure 6 - the trajectory of the finger in a curly groove.

The device includes a packer 1, a hydraulic armature 2 and a valve block 3 (Fig. 1).

Packer 1 contains:

Hollow shaft 4,

right-hand thread (on shaft 4) - 5,

left-hand thread (on shaft 4) - 6.

Anchor with breadcrumbs - 7.

Seals - 8.

The locking mechanism - 9,

a transport nut with a right-hand thread (mechanism 9) - 10,

locking chic with left-hand thread (mechanism 9) - 11.

The packer 1 contains a hollow shaft 4 with multidirectional threads 5 and 6, an anchor with crackers 7, seals 8 and a locking mechanism 9. The locking mechanism 9 is made with transport 10 and locking 11 nuts with multidirectional threads. The thread of the transport nut 10 responds to the right-hand thread 5 of the hollow shaft 4. The thread of the lock nut 11 responds to the left-hand thread 6 of the hollow shaft 4 (FIG. 2 and FIG. 3).

Hydraulic anchor 2 contains:

Case - 12,

spring-loaded crackers (in case 12) - 13.

In the housing 12, seals with a hollow shaft 4 are installed (Fig. 4).

Valve block 3 contains:

Sub - 14.

Inner case - 15,

hole (in case 15) - 16.

Outer case - 17,

hole (in the housing 17) - 18.

The movable sleeve (between the housings 15 and 17) - 19,

hole (in the sleeve 19) - 20,

figured groove (in the sleeve 19) - 21,

spring (for sleeve 19) - 22.

Shut-off valve (in case 15) - 23,

seat (shut-off valve 23) - 24,

shear seat (shut-off valve 23) - 25.

Finger (in a figured groove 21) - 26.

The valve block 3 consists of a sub 14, the inner housing 15 and the outer housing 17, the movable sleeve 19 and the shut-off valve 23.

The outer housing 17 is prefabricated. A movable sleeve 19 is installed between the inner 15 and outer 17 cases.

In the inner 15 and outer 17 housings and the movable sleeve 19, holes 16, 18, 20 are made, respectively.

The movable sleeve 19 is made to rotate about the axis of the hollow shaft 4.

The movable sleeve 19 has a figured groove 21.

The movable sleeve 19 is spring-loaded with a spring 22 relative to the outer casing 17.

The shut-off valve 23 is provided with a seat 24 and a shear seat 25 for throw balls. The shutoff valve 23 is placed in the inner housing 15 coaxially with the hollow shaft 4.

The movable sleeve 19 and the shutoff valve 23 are interconnected by a finger 26 (figure 5).

Finger 26 have the ability to move along the curly groove 21 along the axis of the hollow shaft 4 from the middle position (“I”) with the transport position of the device to the lowest (“K”) position when the shut-off valve 23 is closed, when the fluid pressure rises in the device and when the hydraulic anchors 2 with the extension of its spring loaded crackers

1, and at the very top ("G") with the shut-off valve 23 open and when relieving the fluid pressure in the device.

When placing the finger 26 in the figured groove 21 in the middle and extremely low position, the holes 20, 18, 16 in the movable sleeve 19, in the outer 17 and the inner 15 cases do not match, and when placing the fingers 26 in the figured groove 21 in the extremely upper position of the hole 20 , 18, 16 in the movable sleeve 19, in the outer 17 and inner 15 cases are the same.

Figure 6 shows the trajectory of the finger 26 along the figured groove 21. In the positions "D", "D", "E" of the finger 26, the holes 20, 18, 16 coincide and the shut-off valve 23 bypasses the liquid through them, and in the positions "Zh "," And "," K "holes 20, 18, 16 do not match and the shut-off valve 23 does not allow fluid from the pipe space to the annular.

Work with the device as follows.

Test the open hole with hydraulic pressure.

The packer 1 on the pipes is lowered into the open hole of the wellbore to the test site, while the balls in the shut-off valve 23 are absent, and the pipes are filled with liquid from the end of the outer casing 17.

The initial position of the finger 26 in the figured groove 21 is the position "And". A ball is thrown into the pipes, which falls on the shear saddle 25 and pressurizes. The shut-off valve 23, and with it the movable sleeve 19, are moved by compressing the spring 22 from the “And” position to the

"TO". The hydraulic anchor 2 is triggered, its spring-loaded crackers 13 extend and abut against the wall of the well.

The pipes rotate to the right (4 turns), and then unload the pipes to packer 1. Transport 10 and lock nut 11 are first screwed from the transport position on the hollow shaft 4, and then move to the final position, in which they will hold the anchor 7 from displacement after breeding its crackers and compression seals 8 between the stops.

Relieve pressure, and spring 22 returns pin 26 to position “G”. Stop valve 23 is open. Well pressure testing may be performed.

The liquid is supplied under the packer 1, while the finger 26 moves from position "G" to position "D" - the well is tested.

After the test, the fluid pressure is removed, and the finger 26 is moved by the spring 22 to the "E" position.

Reinstall the packer lower or higher in the well.

The liquid is supplied to the pipes under pressure. The finger 26 together with the movable sleeve 19 and the shut-off valve 23 are moved down to position "G". The hole 20 does not match the holes 18 and 16. The shutoff valve 23 is closed. The hydraulic anchor 2 is activated again.

The pipe is rotated eight turns to the right and its tension. Transport 10 and locking nut 11 during rotation will shift down, release the hollow shaft 4.

With further lifting of the pipes, the packer part of the packer 1 will be disrupted. Stop the flow of liquid into the pipes and reinstall the packer

1, while the finger 26 will switch from position "G" to position "And" - the shut-off valve 23 is closed.

The process fluid is injected into the reservoir with increased productivity.

The process fluid can be pumped into the formation with the shut-off valve 23 closed. The fluid is supplied with a pressure exceeding the strength of the shear saddle pin 25. The shear saddle 25 is sheared off and fluid with high productivity enters the formation. To remove the packer 1, you will need again the fluid pressure for the hydraulic armature 2 to work, which can be achieved by throwing a ball into the pipe 24 on the seat 24, which will repeat the operation of the valve block 3.

The presence in the device of the packer 1, hydraulic armature 2 and valve block 3, which are functionally complementary, provides for testing an open wellbore with hydraulic pressure, conducting several reinstallations of the packer lower or higher in the well, and pumping the process fluid into the formation with increased productivity, which ensures the reliability of the device and extends the functionality of the work.

The proposed device used equipment widely used in the oil and gas industry, and pilot tests determine, according to the applicant, its compliance with the criterion of "industrial applicability".

Claims (1)

A device for working in open trunks, including a packer containing a hollow shaft with multidirectional threads, an anchor with crackers, seals, a locking mechanism made with transport and lock nuts with multidirectional threads, mating threads of the hollow shaft, characterized in that the device contains functionally connected to each other with a friend and with a packer, a hydraulic anchor with spring-loaded crackers and a valve block consisting of inner and outer casings with openings made in each of them, separated by a sleeve containing holes similar to the holes in the inner and outer casings, rotatable relative to the axis of the hollow shaft, having a shaped groove and spring-loaded spring relative to the outer casings, and from a shut-off valve with saddles for throw balls placed in the inner housing coaxially with the hollow a shaft and a finger coupled to the movable sleeve, having the ability to move along the curly groove along the axis of the hollow shaft from the middle position (with the transport position of the device) to the extremely lower it (when the shut-off valve is closed, when the fluid pressure in the device and when the spring loaded hydraulic anchors are extended) and to the very upper (when the shut-off valve is open and when there is no fluid pressure in the device), while placing the finger in the middle groove in the middle and the lower position of the hole in the movable sleeve, in the outer and inner cases do not match, and when placing the finger in a curly groove in the extremely upper position of the hole in the movable sleeve, in the outer and inner cases match.