Procedure for insulating permeable section of production string or perforated interval of idle formation of well (versions)

FIELD: oil and gas industry.

SUBSTANCE: invention refers to process and production technique of hydrocarbons extraction and can be implemented for insulating permeable section or idle perforated interval of well borehole. According to version 1 and 2 the procedure consists in lowering one or several packers on the flow string of the pump installation for oil extraction into the well and in seating the packers above it. According to version 1 two packers are arranged in the well borehole between a pump and permeable section or idle perforated interval, while at least one by-pass element with hydraulic channels is installed between them; also pressure tightness of the packers is checked after seating. According to version 2 one packer with two sets of packer cups and at least with one hydraulic channel between them is installed in the borehole of the well between the pump and the permeable section or idle perforated interval; also the packer is checked for tightness upon seating. According to version 3 at least two packers are lowered into the well on the string; a disconnector of the string is arranged above the upper packer; also one of the packers is landed higher, while another - lower of the permeable section or idle perforated interval, notably the string above the upper packer is disconnected from it upon seating and tightness check. An additional disconnector of the string and a well chamber with a removable element are placed between the packers.

EFFECT: reduced expenditures for operations, also reduced time for well repair, increased service life of well and underground equipment, and increased production yield.

33 cl, 9 dwg

 

The invention relates to the technology and techniques of production of hydrocarbons and can be used to isolate the leaking area or outside of the perforated interval of the barrel of the pump, fountain, gas lift, pressure or piezometric wells.

Known pumping plant for well operation (patent RF №2300668)containing lowered into the well on a string of pipe pumping device consisting mainly of a pump with the selection grid and a submersible electric motor with a power cable, and installed in the trunk or one packer with cable between the pump and insulated interval (unpressurized area or outside of the perforation interval) or two packer with cable, respectively, one of them is located above the insulated interval, and the other between the pump and the isolated interval.

Known downhole packer installation with pump (patent RF №2331758), including lowered into the well on a string of pipe pump and two packer with cable, respectively, one of which is installed above the isolated interval and the other between the pump and the isolated interval and two-pass device with radial and longitudinal channels arranged above and below the packers, while inside the pipe string is lowered a given length of pipe of smaller diameter and it is sealed connection of the Jena top and bottom with the relevant by-pass devices for release of free gas from podvecerni zone.

These settings do not allow at low reservoir (static) pressures in pumping wells to determine the tightness of the landing of the packer between the pump and insulated interval (unpressurized area or outside of the perforation interval) of the barrel, because the layers rapidly absorb liquid (water) when pressure testing of the packer and accordingly the fluid level in the wellbore does not rise to the mouth, and means to raise the pressure in the string of pipe to the desired value cannot be reached.

Known packer ORS (Drilling portalwww.drillings.ru/prsconsisting of three main parts, the upper and lower sealing units sleeve-type, and between the valve site. This is not the packer can be used during well operation, that is, it is only for technological operations in the repair of wells, such as targeted treatment of bottom-hole formation zone and disabling obednevshego formation method of plugging with cement or other cementitious materials, after which it is removed from the well.

Also known two-packer Assembly or system (HUGHSON Service,www.yugson.ru/izn/html; CJSC "Plant ESMERON,www.izmeron.inc.ruto isolate areas of leakage in the casing, including lowered into the well simultaneously two packer, one set above and the other below C is data leakage. They have a relatively high accident rate, as between the packers missing disconnector columns and they are released at the same time due to their rigid connection, and before they breakdown annular line pressure between the packers are not balanced.

The aim of the invention is to increase the efficiency of the method when the installation of underground equipment and operation of pumping, flowing, gas lift, discharge and piezometric wells.

Technological, technical and the economic effect from the use of the proposed solutions for the mining, discharge and piezometric wells is achieved, in particular, by reducing the cost of activities; reduce the time needed to carry out repair work on the well; increasing the service life of wells and underground equipment; increase production.

The method according to option 1 and 2 includes a descent into the well on a string of pipe pumping units for oil extraction, at least one of the exploited of the reservoir, and the landing above her when compressed (pressurized) the string of pipe one or more packers (mechanical, pulse, anchor, hydraulic, hydro-mechanical or electrical). When the packer or packers are either equipped with a cable or cables either they comply with the s cable glands (for example, for a pump installation type ESP), or they are cable or cable glands (for example, for a pump installation type usgn).

The method according to option 3 involves a descent into the fountain, gas lift, pumping, injection, or piezometric well on the string of pipe, at least two packers, on top of which is placed disconnector pipe string, with one of the packers down above and the other below the leaking section of the production casing or perforation interval non-operating (non-productive, i.e. outside of the perforated interval) of the reservoir, and after landing and checking (crimp) for tightness rassadina above the upper packer a string of pipe from him, and then either leave her in the well, or extracted from it and down borehole installation in the well for operation, research, or injection of fluid.

The goal of the method according to option 1 is achieved by the fact that both packer in any combination placed in the wellbore between the pump and leaking section of the production casing or perforation interval unexploited (for example, unproductive) layer, and between them set at least one bypass element (with hydraulic channels) a downhole camera without or with a removable element, or in the form of a pipe with holes,or check valve, or differential valve or a mechanical valve, or the circulation of the site, and after landing packers check their tightness, creating a defined excess pressure in the string of pipe and respectively in the annular space between the packers through the fluid channel pass element, or by running the pump unit when closed the mouth of the well, either through wellhead pumping unit, and when you stop pumping installation or Assembly, if there is a decline in value of excess pressure in the string of pipe, then take the landing of both packers leaking and pick them up and pump the installation of wells for revision, and if, on the contrary, the excessive pressure drop not, then take the landing packers tight and with an open mouth start the pump unit and accordingly the reservoir in use, with subsequent control the amount of water and oil in production, and in the event of significant growth of water or drops of oil will check the tightness of the packers through the creation and endurance of excess pressure in the string of pipe and respectively in the annular space between the packers, with the pump unit when closed the mouth of the well.

Also for the efficiency and reliability of the method according to option 1 can be done in hung the basis of operating conditions additional operations:

- perform pressure test the tubing during landing or before planting packers, and the string of pipe above the packers down the nipple under a removable check valve;

below the packer above the pump unit set or fixed-return valve or nipple to a removable check valve, or a valve with a removable check valve;

- perform pressure test the tubing during landing or before planting packers, and between the packer in the borehole camera temporarily installed with the use of cable technology, the removable element is in the form of a hollow tube or check valve;

- after starting the pump unit and output wells to extract mode using cable technology removable check valve from the nipple for possible reverse circulation of fluid through the pump;

between the packers in downhole camera to be installed using a cable machinery removable element as a stand-alone gauge for measuring annulus and/or pipe pressure before planting, during planting and after planting packers, and by operation of the pumping unit;

- set the packer in the well before or after removal of the removable element of the downhole chamber between the packers;

between the packers in downhole camera to be installed using a cable machinery removable element in the form about Atego or gas-lift valve for checking packers for tightness and/or eliminate leakage of produced fluid tightness at least one packer;

- after landing packers and check them for tightness installed with the use of cable technology in downhole camera removable element is in the form of a hollow tube to increase the tightness of the packers during well operation;

on the string of pipe down additional packer and place it over the leaking area or perforation interval unexploited unproductive reservoir;

either the cable or the cable from the packers connect the power cord from the pump unit type ESP or power cable from the pump unit type ESP is passed through the cable glands packers;

the lower packer is made of pulse, and the upper or top packers anchor;

on the string of pipe above the packers down or non-removable drain or whipped valve or set of at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or valve, circulation or inhibitor valve, or a stand-alone device for washing, plugging of wells, the injection of the inhibitor or reagent into the well, measuring pressure and temperature at various depths;

on the string of pipe below the packer or install fixed or removable jet pump, or fixed bypass the opposite site of free gas for the release of free gas in the string of pipe from podpatrzone, or install at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or valve, circulation or inhibitor valve, or a stand-alone device for checking the lower packer leak from the bottom, the release of free gas in the string of pipe from podvecerni zone, leaching, plugging of wells, the injection of the inhibitor or the reagent in the reservoir, measuring pressure and temperature at various depths;

the lower packer and under it fixed bypass return unit or downhole camera with a removable element in the form of gas-lift or valve down into the well at the depth where the pressure of the free gas below the lower packer is greater than the fluid pressure in the string of pipe under steady-state operation of the pump for possible poisoning of free gas from the annulus into the string of pipe;

- the pump unit periodically stop to reduce pipe pressure above the pump and consequently the release of free gas in it from podvecerni zone, and then the pump runs and, thus, increased tubular pressure above the pump and closes below the lower packer bypass return unit or the check valve during operation of the well.

- packers equip inside axial or uniaxial bypass channel, edinelim hydraulically above and below the annulus with podvecerni area for grazing of free gas;

above the packers install removable jet pump, but inside they are equipped with axial or uniaxial bypass channel connecting the hydraulic jet pump podvecerni area for grazing of free gas in the pumping installation.

The aim of the method according to option 2 is achieved by the fact that in the wellbore between the pump and leaking section of the production casing or perforation interval unexploited (for example, unproductive strata) establish one packer, made with two sets of cuffs, between which the trunk perform at least one fluid channel, with or without feedback node, and place the anchor sleeve with by-pass channels, while after the landing of the packer checks its integrity, creating a defined excess pressure in the string of pipe and respectively in the annular space between the sets of cuffs packer through the fluid channel, or by running the pump installation with a closed mouth of the well, either through wellhead pumping unit, and when the pump stops, if there is a fall in the value of the excess pressure in the string of pipe, then take the landing packer leaking and pick it up and pump the installation of wells for revision, and if, on the contrary drop excess pressure does not occur, take the landing packer g is retacnyl and with open mouth start the pump unit and accordingly the reservoir in use, with subsequent control the amount of water and oil in produced products, moreover, in case of a significant growth of water or drops of oil will check the tightness of the packer through the creation and endurance of excess pressure in the string of pipe and respectively in the annular space between the sets of cuffs packer by pumping installation with a closed mouth of the well.

Also for the efficiency and reliability of the method according to option 2 can be performed, depending on operating conditions additional operations:

on the string of pipe down additional packer and place it over the leaking area of the production string or perforation interval unexploited unproductive reservoir;

- perform pressure test the tubing during landing or before planting packer or packers, and the string of pipe above the packer or packers down the nipple under a removable check valve;

- perform pressure test the tubing during landing or before planting packer or packers, and below the packer or packers on the pump unit set or fixed-return valve or nipple to a removable check valve, or a valve with a removable check valve;

- after starting the pump unit and output wells to extract mode using cable technology removable check valve from the nipple to ensure the treatment is based circulation through the pump;

on the string of pipe above the packer or packers are down or non-removable drain or whipped valve, or install at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or valve, circulation or inhibitor valve, or a stand-alone instrument (pressure gauge, thermometer) for washing, plugging of wells, the injection of the inhibitor or reagent into the well, measuring pressure and temperature at various depths;

on the string of pipe below the packer or install fixed or removable jet pump, or fixed bypass the opposite site of free gas for the release of free gas in the string of pipe from podvecerni zone, or set, at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or valve, circulation or inhibitor valve, or a stand-alone device for checking the packer below the leak, release of free gas in the string of pipe from podvecerni zone, leaching, plugging of wells, the injection of the inhibitor or reagent into the reservoir, measuring pressure and temperature at depth;

- packer and under it fixed bypass return unit or downhole camera with a removable element in the form of gas-lift or valve down into the well to rechenaufgaben, where the pressure of the free gas below the lower packer is greater than the fluid pressure in the string of pipe under steady-state operation of the pump for possible poisoning of free gas from the annulus into the string of pipe;

- the pump unit periodically stop to reduce pipe pressure above the pump and consequently the release of free gas in it from podvecerni zone, and then the pump runs, and thereby increases the pipe pressure is higher than the pump and closes below the lower packer bypass return unit or the check valve during operation of the well.

- the packer or packers are equipped inside the axial or uniaxial bypass channel connecting the hydraulically above and below the annulus with podvecerni area for grazing of free gas;

above the packer or packers are set removable jet pump, and inside it or they are equipped with axial or uniaxial bypass channel connecting the hydraulic jet pump podvecerni area for grazing of free gas in the pumping installation;

any cable from the packer or packers connect the power cord from the pump unit type ESP or power cable from the pump unit type ESP is passed through the cable gland of the packer or packers;

- packer between the pump and leaking the plot or the interval for the scrap perforation unproductive layer is made of a pulse;

- after checking the tightness of the landing of the packer between sets his cuffs divide by mechanical or hydraulic fluid channel of the trunk from the cavity of the pipe string to the reliability and integrity of the packer during well operation.

The aim of the method according to option 3 is achieved by the fact that during the descent of the column of pipes between the packers placed additional disconnect the tubing of a mechanical or hydraulic action for separate descent-ascent packers, and downhole camera with a removable element in the form of a hollow tube or a stand-alone device for opportunities before falling packers equalizing pipe and annulus pressure between them, by extracting from the downhole camera with cable technology, a removable hollow tube or standalone device. A standalone unit between the packers measure the pressure on the leaking section of the production casing or perforation interval unproductive strata.

Installation for implementing the method are given in figures 1 to 9, in particular 1, 2, 3 - ways pump unit with two packers, between which is a bypass element; 4 - pump setup with a single packer having two sets of cuffs and between the bypass channel; figure 5 - tripatra pump installation; with 6 - packer and pump installation have a chance to view the Yu bypass free gas; 7 - packer and pump installation with jet pump; Fig - packer with two sets of cuffs; figure 9 - installation with two packers, between which there is a switch columns and borehole camera with a removable element.

The method according to option 1 and 2 is mainly used for wells with low formation pressure, i.e. when there is intense absorption liquid reservoir or insulated water zones (unpressurized area or outside, unproductive by the perforated interval in the well. You cannot compress the tightness of the landing of the packer above the pump. When uncertainty tightness planting packer above the pump after installation of underground equipment prematurely removed from the bore of the lifting installation and ORS crew, and then during operation of the wells due to the significant growth of the percentage of water in crude production is detected leakage planting packer. This leads to additional energy and labor costs, again because the well is mounted lift installation and is held by a brigade of ORS re-ascent-descent of the column of tubes with a pump and a packer.

The method according to option 1 and 2 includes a descent into the well 1 to the string of pipe 2 pump unit 3 for oil, at least one exploitable reservoir , and landing above it in a sealed column tube 2, at least two packers 5 and 6 with the corresponding sets of cuffs 7 and 8 (see figure 1, 2, 3, 5, 6, 7), or one of the packer 5 with two sets of cuffs 7 and 8 (for example, see figure 4). When the packer 5 or packers 5 and 6 are mechanical, pulse, anchor, hydraulic, hydro-mechanical or electrical action, and the packers can be equipped with a cable 9 or the cables 9, 10 (see figure 2), or completed with cable glands 11, 12 (see figure 1), or for connection of the cable 9 or cables 9, 10 with a power cable 13, or for passing through the cable entry 11, 12 power cable 13 from the pump unit 3 type ESP. Packer 5 or packers 5, 6 can also be equipped with cables 9, 10 or performed without cable gland 11, 12 to the pump unit 3 type usgn.

When implementing the method according to option 1 both packer 5 and 6 (in any combination by their action) is placed in the wellbore 1 between the pump 3 and leaking (water) section of the production casing or outside of the perforation interval unexploited (for example, unproductive) layer 14. Between the packers 5 and 6 establish at least one bypass element 15 (with hydraulic channels) a downhole camera (see figure 1, 3) or pipe with holes, or a check valve or a differential pressure valve, or a mechanical the CSOs valve, or circulation of the node (see figure 2, 5, 6, 7). Here downhole camera 15 may be removable element 16 or without him. After lowering the equipment into the well 1 set packers 5, 6, and checks their integrity, creating a defined excess pressure in the string of pipe 2 and, respectively, in the annular space 17 between sets of cuffs 7 and 8 packers 5, 6 through the bypass channels of item 15 or 17. This excess pressure is made either by running the pump unit 3 at the closed mouth of the well 1 or using a mobile wellhead pumping unit. And when you stop the fluid, if there is a fall in the value of the excess pressure in the string of pipe 2, then take the landing of both packers 5, 6 leaking (although one of them may be sealed) and pick them up and pump unit 3 from well 1 to revision, and if, on the contrary, when exposed to excess pressure take landing packers 5, 6 sealed and run pump unit 3 with an open mouth and accordingly the well 1 in use, with subsequent control the amount of water in crude production. Moreover, in case of a significant growth of water repeat the leak test packers 5, 6 through the creation and endurance of excess pressure in the string of pipe 2 and, respectively, in the annular space 17 between the packers with the help of the pump unit 3 when closed, the wellhead 1.

When implementing the method according to option 2 (see figure 4, 8) between the pump 3 and leaking (water) section of the production casing or outside of the perforation interval unexploited (for example, unproductive) layer 14 set one packer 5, made with two sets of cuffs 7 and 8, between which the barrel 18 (Fig) perform one or more hydraulic channels 19 (with or without feedback node, for example, in the form of rubber 20 Fig to eliminate reverse flow of fluid by leakage of a set of cuffs 8 packer 5) and place the anchor sleeve 21 with a by-pass channels 22 (4, 8). After landing packer 5 check its tightness, creating a defined excess pressure liquid "W" in the column tube 2 and, respectively, in the annular space 17 between sets of cuffs 7 and 8 of the packer 5 through the hydraulic channels 19. This overpressure "W" create or by running the pump unit 3 at the closed mouth of the well 1 or using a mobile wellhead Assembly. And when you stop the flow, if there is a decline in value of excess pressure "W" in the column tube 2, then take the landing of the packer 5 leaking and pick it up and pump unit 3 from well 1 to revision, and if, on the contrary, when exposed to excess pressure "W" accept landing packer 5 sealed and run on the axis setting of 3 with an open mouth and accordingly the well 1 in use, with subsequent control the amount of water in crude production, and in the case of significant increases repeat the leak test packer 5 by creating and extracts excess pressure "W" in the column tube 2 and, respectively, in the annular space 17 between sets of cuffs 7 and 8 of the packer 5 using the pump unit 3 when closed, the wellhead 1.

Also for the efficiency and reliability of the method according to option 1 and 2 can be performed, depending on operating conditions, additional operations, in particular the tightness of the pipe string 2 determine at the time of landing or before planting packer 5 or packers 5 and 6. That is, the string of pipe 2 above the packer 5 (see figure 4) or 6 (see figure 2) down the nipple 23 to install it using cable technology removable check valve when checking the tubing 2 leak or exceptions reverse flow of fluid. Between the packers 5 and 6 in borehole camera (bypass element 15 can be installed using cable technology, a removable element 16 (see Fig 1, 3) in the form of a hollow tube, gas-lift or a check valve for checking the tubing 2 for tightness as before boarding packers 5 and 6, and after their landing, and during operation of the well 1. Below the packer 5 or packers 5, 6 above the pump unit 3 can be installed non-removable check valve 24 (see figure 3) or nipple 25 without or with a removable check valve 26 (see Phi is .1, 2) to check the tubing 2 for tightness and/or exceptions reverse flow of fluid after stopping the pump unit 3. Also after running the pump unit 3 and output wells 1 mode can be extracted using the rope technique, removable check valve 26 from its nipple 25, for example, to create a reverse flow or circulation of liquid through the pump 3 (for example, to flush the pump 3, the processing of bottom-hole zone of the reservoir 4 etc). In addition, between the packers 5 and 6 in the downhole chamber 15 can be installed using cable technology removable element 16 as a stand-alone pressure gauge, to measure annular and/or pipe pressure before planting, during planting and after planting packers 5 and 6, as well as the pump unit 3. After landing packers 5, 6, and molding can be installed using cable technology in downhole camera 15 removable element 16 in the form of a hollow tube, gas-lift or valve, to improve the reliability and integrity of packers 5, 6 during operation of the well 1. On the string of pipe 2 can be lowered an additional packer 27 (for example, see figure 5, 6) and placed over the leaking area or outside of the perforation interval 14 of the wellbore 1.

On the string of pipe 2 below the packer 5 can be lowered removable or neshem the second jet pump, or fixed bypass the opposite site of free gas, or borehole camera 28 to release of free gas "G" from podvecerni zone 29 (for example, see figure 3). Borehole camera 28 is equipped with a removable element 30 (e.g., the form of a hollow tube, reverse or gas-lift valve, circulation or inhibitor valve, or a stand-alone gauge) for washing, killing, injection of the inhibitor or reagent, measuring pressure and temperature at depth, the possibility of crimping the packer 5 from the bottom, and release of free gas "G" in the string of pipe 2 from podvecerni zone 29. When this bypass free gas is carried out by periodically stopping operation of the pump unit 3 to reduce pipe pressure above the pump 3 and, accordingly, release of free gas "G" in it from podvecerni zone 29. The pump is then run 3, and thereby increases the pipe pressure is higher than the pump 3 and closes the return unit 28 or the valve 30 during well operation 1.

Also on the string of pipe 2 above the upper packer 6 can be lowered fixed drain or whipped valve 31 (Fig 3, 4) and/or downhole camera 32 (3) removable element 33 (for example, the form of a hollow tube, reverse or gas-lift valve, circulation or inhibitor valve, or a stand-alone gauge), for washing, glushen what I injection of the inhibitor or reagent, measuring pressure and temperature at its depth.

Packer 5 or packers 5, 6, and 27 can be fitted inside the axial or uniaxial bypass channel 34 (for example, see Fig.6), connecting above and below the annulus 35 podvecerni area 29 for the release of free gas "G". Also above the packer 5 or packers 5, 6 can be set fixed or removable jet pump 36 (for example, see Fig.7), but inside they are equipped with axial or uniaxial bypass channel 34 connecting the jet pump 36 with podvecerni area 29 for the release of free gas "G" when operating the pump unit 3.

Also after checking the tightness of the landing of the packer 5 between sets his cuffs 7 and 8 (Fig) divide by mechanical or hydraulic means (for example, movement of the sleeve 37) hydraulic channels 19 of the shaft 18 from the cavity of the tubing to increase the tightness of the packer 5 during well operation.

The method according to option 3 involves a descent into the fountain, gas lift, pumping, injection, or piezometric wells 1 on the string of pipe 2, at least two packers 5 and 6, on top of which is placed disconnector pipe string 38, with one of the packers down 6 above, and the other 5 below unpressurized area or outside of the perforated interval of 14, and after their landing and identify the scoops rassadina above the upper packer 6 column tube 2 from him by detaching the shaft from the housing (or Vice versa) disconnect the tubing 38, and then either leave her in the well 1 or remove it and put borehole installation (for example, ESP, usgn etc) for operation, research, or injection.

When implementing the method according to option 3 perform the following operations. During the descent of the column tube 2 between the packers 5 and 6 place additional disconnect the tubing 39 mechanical and/or hydraulic action for separate descent-ascent packers 5, 6 and borehole camera 40 with a removable element 41 in the form of a hollow tube or a stand-alone gauge for opportunities before falling packers 6 and 5 of the adjustment tube (RT) and annulus (RA) pressure between them by extracting from the downhole chamber 40 through the cable equipment removable element 41. When the removable element 41 as a stand-alone gauge between the packers 5 and 6 can measure the pressure on the leaking area or outside of the perforation interval 14 of the wellbore 1 before planting and during and after planting packers 5 and 6, as well as during operation of the well 1 to determine (after it is retrieved from the downhole camera 40) integrity packers 5 and 6 during operation, as well as clarification of the dynamics of the reservoir (mountain) pressure.

1. Way to isolate the leaking section of the production casing or perforation interval unexploited reservoir wells, who with a descent into the well on a string of pipe packer and pumping units for oil extraction, at least one exploitable reservoir, and landing above the pump when pressed the string of pipe, at least two packers - mechanical, pulse, anchor, hydraulic, hydro-mechanical or electrical action for disconnection of the pump intake from the unpressurized section of the production casing or perforation interval unexploited reservoir, while the packer either equipped or not equipped with a cable or cables, or performed without or with cable glands, characterized in that both of the packer in any combination placed in the wellbore between the pump and leaking section of the production casing or perforation interval unexploited, for example, unproductive, reservoir, and between them set at least one bypass element with hydraulic channels in the form of a downhole camera without or with a removable element, or in the form of a pipe with holes, or valve, or differential valve or a mechanical valve, or the circulation of the site, and after landing packers check their tightness, creating a defined excess pressure in the string of pipe and, respectively, in the annular space between the packers through the hydraulic channel pass element, or by running the pump unit with a closed mouth is quaini, either through wellhead pumping unit, and when you stop pumping installation or Assembly, if there is a decline in value of excess pressure in the string of pipe, then take the landing of both packers leaking and pick them up and pump the installation of wells for revision, and if Vice versa - drop excess pressure does not occur, take the landing packers tight and with an open mouth start the pump unit and, accordingly, the reservoir in use, with subsequent control the amount of water and oil in production, and in the event of significant growth of water or drops of oil will check the tightness of the packers by creating and extracts excessive pressure in the string of pipe and, respectively, in the annular space between the packers, with the pump unit when closed the mouth of the well.

2. The method according to claim 1, characterized in that the produce crimping the tubing during landing or before planting packers, and the string of pipe above the packers down the nipple under a removable check valve.

3. The method according to claim 1 or 2, characterized in that below the packers over the pump unit set or fixed-return valve or nipple to a removable check valve, or a valve with a removable check valve.

4. The method according to claim 1 or 2, distinguished by the different topics produce a crimping the tubing during landing or before planting packers, and between the packer in the borehole camera temporarily set using cable technology, the removable element is in the form of a hollow tube or check valve.

5. The method according to claim 3, characterized in that after starting the pump unit and output wells to extract mode, using rope techniques, removable check valve from the nipple to the possibility of the reverse circulation of fluid through the pump.

6. The method according to claim 1, characterized in that between the packer in the borehole camera set using cable technology, the removable element is in the form of a standalone device, for measuring annulus and/or pipe pressure before planting, during planting and after planting packers, and by operation of the pumping installation.

7. The method according to claim 1, characterized in that the set packer before or after removal of the removable element of the downhole chamber between the packers.

8. The method according to claim 1, characterized in that between the packer in the borehole camera set using cable technology, the removable element is in the form of a return or gas-lift valve, check tubing for leaks and/or eliminate leakage of produced fluid tightness at least one packer.

9. The method according to claim 1, otlichuy is the, after landing packers and check them for tightness set, using rope techniques, downhole camera removable element is in the form of a hollow tube, to increase the tightness of the packers during well operation.

10. The method according to claim 1, characterized in that the string of pipe down additional packer and place it over the leaking area or perforation interval unexploited reservoir.

11. The method according to claim 1 or 10, characterized in that either the cable or the cable from the packers connect the power cord from the pump unit type ESP or power cable from the pump unit type ESP is passed through the cable glands packers.

12. The method according to claim 11, characterized in that the lower packer is made of pulse, and the top or upper packer support.

13. The method according to claim 11, characterized in that the string of pipe above the packers down or non-removable drain or whipped valve, or install at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or valve, circulation or inhibitor valve, or a stand-alone device for washing, plugging of wells, the injection of the inhibitor or reagent into the well, measuring pressure and temperature at its depth.

14. The method according to claim 11, characterized in that the string of pipe below the packer to be the more fixed or removable jet pump, or fixed bypass the opposite site of free gas, free gas poisoning in the string of pipe from podvecerni zone, and/or at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or valve, circulation or inhibitor valve, or a standalone device, to enable the verification of the lower packer leak from the bottom, the release of free gas in the string of pipe from podvecerni zone, leaching, plugging of wells, the injection of the inhibitor or the reagent in the reservoir, measuring pressure and temperature at its depth.

15. The method according to 14, characterized in that the lower packer and under it fixed bypass return unit or downhole camera with a removable element in the form of gas-lift or valve down into the well at the depth where the pressure of the free gas below the lower packer is greater than the fluid pressure in the string of pipe under steady-state operation of the pump for possible poisoning of free gas from the annulus into the string of pipe.

16. The method according to 14, characterized in that the pump unit periodically stop to reduce pipe pressure above the pump and, accordingly, release of free gas in it from podvecerni zone, and then the pump runs and, thereby, increase pipe pressure is higher on the wasp and closes below the lower packer bypass return unit or the check valve during operation of the well.

17. The method according to claim 1 or paragraph 10, wherein the packer equip inside axial or uniaxial bypass channel connecting the hydraulically above and below the annulus with podvecerni area for grazing of free gas.

18. The method according to claim 1 or paragraph 10, characterized in that above the packers install removable jet pump, but inside they are equipped with axial or uniaxial bypass channel connecting the hydraulic jet pump podvecerni area for grazing of free gas in the pumping installation.

19. Way to isolate the leaking section of the production casing or perforation interval unexploited reservoir wells, including the descent on the string of pipe into the borehole, at least one packer and pumping units for oil extraction, at least one exploitable reservoir, and landing above the pump when pressed the string of pipe packer - mechanical, pulse, hydraulic, hydro-mechanical or electrical action for disconnection of the pump intake from the unpressurized section of the production casing or perforation interval unexploited reservoir, while the packer either equipped or not equipped with a cable, either performed with or without cable gland, characterized in that in the wellbore between the pump and leaking what castcom production casing or perforation interval unexploited, for example, unproductive, layer one set packer, made with two sets of cuffs, between which the trunk perform at least one fluid channel, with or without feedback node, and place the anchor sleeve with by-pass channels, while after the landing of the packer checks its integrity, creating a defined excess pressure in the string of pipe and, respectively, in the annular space between the sets of cuffs packer through the fluid channel, or by running the pump unit when closed the mouth of the well, either through wellhead pumping unit, and when the pump stops, if there is a decline in value excessive pressure in the string of pipe, then take the landing packer leaking and pick it up and pump the installation of wells for revision, and if, on the contrary - the fall of the excess pressure does not occur, take the landing of the packer sealed and with an open mouth start the pump unit and, accordingly, the reservoir in use, with subsequent control the amount of water and oil in production, and in the event of significant growth of water or drops of oil will check the tightness of the packer through the creation and endurance of excess pressure in the string of pipe and, respectively, in the annular space between the sets of cuffs packer with the OSU pump unit with a closed mouth of the well.

20. The method according to item 19, wherein the string of pipe down additional packer and place it over the leaking area of the production string or perforation interval unexploited reservoir.

21. The method according to claim 19 or 20, characterized in that the produce crimping the tubing during landing or before planting packer or packers, and the string of pipe above the packer or packers down the nipple under a removable check valve.

22. The method according to claim 19 or 20, characterized in that the produce crimping the tubing during landing or before planting packer or packers, and below the packer or packers on the pump unit set or fixed-return valve or nipple to a removable check valve, or a valve with a removable check valve.

23. The method according to claim 19 or 20, characterized in that after starting the pump unit and output wells to extract mode, using rope techniques, removable check valve from the nipple to provide reverse circulation through the pump.

24. The method according to claim 19 or 20, characterized in that the string of pipe above the packer or packers are down or non-removable drain or whipped valve, or install at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or reverse the first valve, circulation or inhibitor valve, or a stand-alone instrument (pressure gauge, thermometer) for washing, plugging of wells, the injection of the inhibitor or reagent into the well, measuring pressure and temperature at its depth.

25. The method according to claim 19, characterized in that the string of pipe below the packer set fixed or removable jet pump, or fixed bypass the opposite site of free gas, for grazing of free gas in the string of pipe from podvecerni zone, and/or at least one downhole camera with a removable element in the form of a hollow tube, gas-lift or valve, circulation or inhibitor valve, or a standalone device, to enable the verification of the bottom packer leak, release of free gas in the string of pipe from podvecerni zone, leaching, plugging of wells, the injection of the inhibitor or reagent in layer, measuring pressure and temperature at its depth.

26. The method according A.25, characterized in that the packer and under it fixed bypass return unit or downhole camera with a removable element in the form of gas-lift or valve down into the well at the depth where the pressure of the free gas below the packer is greater than the fluid pressure in the string of pipe under steady-state operation of the pump for possible poisoning of free gas from setrab the first space in the string of pipe.

27. The method according A.25, characterized in that the pump unit periodically stop to reduce pipe pressure above the pump and, accordingly, release of free gas in it from podvecerni zone, and then the pump runs and, thus, increased tubular pressure above the pump and closes below the lower packer bypass return unit or the check valve during operation of the well.

28. The method according to claim 19 or 20, characterized in that the packer or packer equip inside axial or uniaxial bypass channel connecting the hydraulically above and below the annulus with podvecerni area for grazing of free gas.

29. The method according to claim 19 or 20, characterized in that above the packer or packers are set removable jet pump, and inside it or they are equipped with axial or uniaxial bypass channel connecting the hydraulic jet pump podvecerni area for grazing of free gas in the pumping installation.

30. The method according to claim 19 or 20, characterized in that either the cable from the packer or packers connect the power cord from the pump unit type ESP or power cable from the pump unit type ESP is passed through the cable gland of the packer or packers.

31. The method according to claim 19, characterized in that after a leak test planting packer between sets his man is no divide by mechanical or hydraulic fluid channel of the trunk from the cavity of the pipe string to the reliability and integrity of the packer during well operation.

32. Way to isolate the leaking section of the production casing or perforation interval unexploited reservoir wells, including the descent into the fountain, gas lift, pumping, injection, or piezometric well on the string of pipe, at least two packers, on top of which is placed disconnector pipe string, with one of the packers down above and the other below the leaking section of the production casing or perforation interval unexploited, for example, unproductive, reservoir, and after their landing and leak testing rassadina above the upper packer a string of pipe from him, and then either leave her in the well, or extracted from her and lowered downhole installation, operation, research, or injection of fluid, characterized in that during the descent of the column of pipes between the packers placed additional disconnect the tubing of a mechanical or hydraulic action, to separate the descent-ascent packers, and downhole camera with a removable element in the form of a hollow tube or standalone device, for before falling packers equalizing pipe and annulus pressure between them, by extracting from the downhole camera using cable technology removable hollow tube or standalone device.

33. The method according to p, great for the decomposing those what a standalone unit between the packers measure the pressure on the leaking section of the production casing or perforation interval unproductive strata.



 

Same patents:

FIELD: oil-and-gas industry.

SUBSTANCE: invention related to oil-and-gas industry, particularly to constraction and repair of wells, with casing string failure. Additional casing string cementing device includes sealing and cementing units, also centraliser. The sealing unit includes a case with toothed cuttings and a sleeve, and installed on the case parker, consisting of a elastic sleeve and top and bottom stops. The cementing unit includes a case with a barrel on the top and a shoe on the bottom, a slide gate, installed in the sealing unit opposite to radial channels and the sealing unit sleeve ring fetch. The top stop is movable, the parker stop connected to the sealing unit case with share elements. The sealing element sleeve equipped with external centralisers from the top.

EFFECT: offered additional casing string cementing device provides significantly increase in operation safety, as it allows to centralise the device and additional tubing string, the offered device descends on the tubing string end inside of the failed string, which assures ACS high quality cementing, also the device allows to take it out in case of parkers non-hermetic landing before ACS cementing, which excludes ACS cementing under the parker, and excludes incident in the well.

2 dwg

FIELD: oil-and-industry.

SUBSTANCE: double-barreled parker with cable inlet contains form two parker barrels, a parker unit, with hydraulic or mechanical drive and a cable inlet sealing unit, and chemical reagents pumping lines. A parker barrels and an internal one, installed one into another and fix between each other with cable inlet orientation, entering barrels ring space through the parkers side window. The cable input sealing unit with chemical reagents pumping lines, consisting of a sealing element with support washers by ends, located in the ring space between barrels, under a press bushing. The sealing unit is joint-splitable and the sealing element separated with a wall with hydro-channels, connected with a control bulk channel.

EFFECT: parker operation reliability increase and cable input improved sealing, passing through the parker without a plug removal.

3 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention related for a tubing string disconnection and the following connection to bottomhole equipment. Proposed hydraulic installation device consists of a case, a connecting unit and a collet, a nut. The case executed borings for bores on the collet leafs, which depth is equal to bores height. In the connection unit, between top and bottom parts executed radial holes for washing and located in staggered order. The boring executed stepped with two bores, the boring of the smaller diametre is for sealing, boring of the bigger diametre for the piston with cylindrical step displacement. At that length of the bottom boring cylindrical part is greater than the top boring length, but smaller than distance from a base of external cylinder case to boring for bores on the collet leafs. The piston executed with a cylindrical step and cannels, on the step for share bolts, in a middle part under the collet leafs and on the ends under sealing. In the piston top end part a ball located and an internal cant executed. The case connected with the connecting unit through the collet and the piston and fixed with a nut. The nut executed with boring for collet base bore.

EFFECT: reliability and efficiency of parker installation works increase, time consumption decrease.

4 cl, 5 dwg

Parker-anchor // 2379471

FIELD: oil-and-gas industry.

SUBSTANCE: well parker-anchor, containing a case, an anchor unit, consisting of a void cone and a ram, installed under a sealing element, located between a top fixed stop block and a bottom stop block, and a drive, made as a piston with pass through channel, equipped with pass though narrowing on the bottom, and from the top - with a void bar, which stiffly and axially connected with the cone from the top, stiffly fixed with the case. The piston installed inside of the movable cylinder, and the inside void between the cylinder and the piston connected with the bar void over the pistons pass through channel narrowing, at that the top stop block executed spring loader from the top and with ability of limited upwards movements, and the bottom stop block equipped with radial windows and is movable, has upwards movement ability, interaction with the cylinder at the bottom. Rams made roller shaped with longitude holes, installed in the bottom stop block windows on axis, which fixed perpendicularly to the case axis, at that the rollers longitude hole diametre is bigger then axis external diametre, and the rollers external surface serially interacts with the void bar external surfaces, the cone, the case and the wells wall during the bottom stop block movement relatively to the case. In the offered parker-roller design, which roles between the well wall and the case, achieves a reliable borehole separation in result to the tubing string weight, because of that parkering and unparkering executed with tubing string movement, which location controlled on the borehole head.

EFFECT: design simplification, operational reliability increase, manufacturing and maintenance works cast cutting due to simple and processible spare part use, their quantity decrease.

7 dwg

Parker // 2379470

FIELD: oil-and-gas industry.

SUBSTANCE: parker contains a channel with sealing element, executed as a set of sleeves, and a hydraulic anchor, including a ram holder, rams and a cone, and an electrical cable, at that the hydraulic anchor has a case-piston, connected to the channel and creating a piston void together with creping its over the ram holder, connected through the channel wall hole with the channel external void, hydraulic anchor case-piston and the parker case connected with nipples over the sealing elements, inside the case-piston channel located a sickle shaped tube adjusting to its external surface, connected to the nipples inclined holes, the electrical cable goes throughout the sickle shaped tube, which cores enters the nipples inclined holes and connected to located on the nipples inclined holes ends cable connectors, with its help cable cores going through the sickle shaped tube connected to extension cables, at that the nipple connected to the channel, connected with tubing string, with the aid of which the parker installed inside the borehole with ability to of tubing string supply through nipples, the parkers channel and the hydraulic anchor case-piston medium produced form the well, at that nipples ends inclined holes and the sickle shaped tube ends mutual dislocation in one plane created because of the nipple position fixing relatively to the parkers channel and the hydraulic anchor case-piston, correspondingly with a help of a retainer nut, screwed on the parkers channel, which rotation relatively to the parkers channel limited with a stop screw, and nipples connected to the channel with captive nuts, screwed on the nipple screw till it external end meets retainer nuts.

EFFECT: parker operation reliability increase.

4 cl, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: device includes a cylindrical case with a sealing element and a parachute-centraliser and a seat, executed with an ability of the sealed element and the seat hermetic interaction. The seat executed as a pump lock support. The sealing element executed with an external cone part, replying to the pump support lock cone part, and an internal cone part, having coning direction opposite to a coning direction of the external cone part. The case has top cylindrical part and bottom cone part, located inside of the sealing elements internal cone part. The sealing element internal cone part and the case bottom cone part executed with a possibility of hermetic interaction. The parachute-centraliser is a barrel shaped, fixed on the case top cylindrical part with the barrel walls directed to the bottom. The barrel walls have holes. A share pin located in the case top cylindrical part flush to the sealing element.

EFFECT: device allows to simplify design and decrease technology operation time during operation, cast cutting.

2 dwg

Drilled parker // 2379468

FIELD: oil-and-gas production.

SUBSTANCE: drilled parker contains setting tool, which includes hydraulic cylinder with bottom support, piston with adapter on the top, top and bottom connecting rods, the connecting rod made with radial canals and stiffly connected with a tip with a process holes to a perforated nipple, a sealing unit, which includes a sleeve, a deformable barrel and a drift with widening angle on its top, connected on the bottom part with a fitting, through a share ring - with the tip and the perforated nipple, which telescopically installed into the drift, equipped with external cylindrical sections, a cutting-off valve and a blind valve, fixed on the tip with a lock ring. The is telescopically installed directly into the deformed barrel and into the bottom support, relatively to which the tip in its transport position fixed with a share bolt. The shut-off valve made as a plug with external ring sampling, hermetically installed into the tip and fixed with stoppers, installed into the tip's process holes with ability of limited movements towards outside incase of share ring destroy and the drift penetration, also with ability to interact in transport position plug ring sampling from the inside, and with drift - from the outside, which external cylindrical sections have a similar diametre, separated with at least one ring cavity with a edge, directed to the sealing unit, at that the drift's widening angle is 20-25° relatively to the parker axis. The deformable barrel's internal cylindrical surface is double-stepped with the smaller diametre on the top, and the upper rod over the piston equipped with outside ring cavity, and the cylinder's sub in its upper part equipped with inside selection with a spring ring, executed with ability to interact with the upper rod ring cavity and piston fixation in the extreme upper position. Use of the bored parker because of drift improved design, which angle is 20-25° relatively to the parker axis, and external sections have the same diametres, separated with at least one ring cavity with the edge, allows to drift widening barrel twice for a drift's single pass, which it its turn made double - staged with the smaller diametre (D1<D2) on the top.

EFFECT: received cone is pressing the sleeve to the production string walls, which increases the bored parker setting reliability in the wells defined interval and avoids its sliding, avoids its resealing during the bored parker installation in to the well.

2 dwg

Drilled out parker // 2374427

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production, particularly used to protect casing string from high pressure. Drilled out parker contains setting tool, including hydro cylinder with bottom support, piston, top and bottom rods, bottom one has radial canal and fixedly connected via tip with access holes to perforated nipple, seal assembly, including collar, deformable sleeve and dron with nozzle, connected on top to sleeve holder, telescopically fixed to support, and on the bottom with a nozzle via share ring with a tip and perforated nipple, which telescopically installed into dron, equipped with external cylindrical areas with external diameters increasing from top to bottom, cutoff valve and end plug, fixed on nozzle with stop collar. Sleeve holder and external support in its transit condition fixed between each other with shear bolt, cutoff valve consists of end plug with external ring , hermetically installed into tip and fixed with stoppers, which installed into nozzle access holes, allowing it limited outwards displacement in case of share ring damage and dron pass through, and also allowing in transit condition internal interaction with plug ring, externally - with dron, which external cylindrical areas connected via smooth transition.

EFFECT: application of drilled out parked with dron improved design allow to increase its installation safety and avoid "creep", and also cutoff valve designed as a plug except leakage during drilled out parker installation into well.

2 dwg

FIELD: mining.

SUBSTANCE: this group of inventions refers to the mining industry, and in particular, to the borehole systems and the method of use of the borehole component. The method includes the use in the borehole component the seal having the filler in the form of nanofibre and implementation of the effect of the component within the hole. The system has the downhole tool having compacting element including polymer material. In the polymer material nanosize filler in the form of carbon nanotubes is dispersed.

EFFECT: this invention allows to improve the durability and improve the functioning of the downhole tools operating in the hostile underground environment.

27 cl, 13 dwg

FIELD: oil and gas production.

SUBSTANCE: invention relates to oil-producing industry, particularly to mechanical packers, used at operation of oil wells by electrically centrifugal pumps. Packer contains mine shaft with threads on butts and axial channel. On external surface of mine shaft it is figured groove, long slot blind below and open in top part of mine shaft. In middle part of mine shaft there are installed rests for cone. In top part of mine shaft by diametre there are implemented transverse slots, in which there are adjusting screws rigidly connecting mine shaft and rest. Under rest there are located sealing elements, cone and iron ring with ability of axial movement relative to mine shaft. In iron ring there are located toothed bowl slip sockets, guide pin and split keys rigidly connecting it to ring in axial direction. Into long slots of ring there are installed screw-thread dies, pressed in radial direction by springs. In area of coupling long slot is overlapped by washers with sealant.

EFFECT: invention provides for simplicity of erection and improvement of abhesion of tube space at usage of electrically centrifugal pump in untight wells.

1 dwg

FIELD: well treatment devices, particularly to stimulate oil production from wells.

SUBSTANCE: method involves creating the first and the second flows moving from well head to reservoir; injecting plugging fluid including plugging material suspended in carrier liquid so that the flow is in contact with well wall inside underground reservoir; separating carrier liquid from plugging material by liquid carrier supply through orifice row extending along the second flow path, wherein the orifices have dimensions, which permit carrier liquid passage and restrain plugging material as it touches the orifices; continuing plugging fluid up to necessary plugging material accumulation to create solid bridge; introducing reservoir treating fluid after solid bridge creation along the first fluid flow path and in contact with reservoir surface in well adjoining accumulated plugging material, which creates solid partition.

EFFECT: increased well treatment efficiency.

25 cl, 11 dwg

FIELD: oil production industry, particularly to install blocking devices inside wells.

SUBSTANCE: method involves forming nipple and coupling pipe ends having parts with taper corresponding to that of thread; forming inner conical threads on coupling pipe ends; creating outer threads on nipple pipe ends; cutting grooves on outer threaded surfaces of coupling ends and on inner threaded surfaces of nipple ends; forming annular extensions on ends of surfaces opposing threaded ones; covering the threads with mineral-and-polymeric cold-welding composition; connecting pipes one to another along with sealant application on threads; lowering the blocking device in previously expanded interval; performing radial expansion of profiled pipes, gauging profiled pipes and flaring cylindrical pipes.

EFFECT: increased reliability, workability and air-tightness.

11 dwg

FIELD: mining industry, namely means to seal or pack boreholes or wells, particularly for constructing water wells and for consolidating water-supply well intervals with tail casing pipes under primary casing pipes.

SUBSTANCE: device has tail casing pipe head and gripper system of primary casing pipe, packing members, circlips and sub. Upper part of outer head surface is cylindrical and has left-handed thread. Lower part thereof facing well bottom is conical. Intersection point of conical surface generators lays on well axis. Gripper system of primary casing pipe is formed as a shoe having inner surface defined by two conical surfaces with apexes extending in opposite directions. Adjoining surfaces of tail casing pipe head and casing shoe have 8-10° cone angles.

EFFECT: simplified structure and improved manufacturability, increased reliability and reduced material consumption.

4 cl, 4 dwg

The invention relates to drilling and is designed for sealing in-line space when lifting pipe from the well under pressure

How well killing // 2089721
The invention relates to the oil industry and can be used in the repair of wells

FIELD: mining industry, namely means to seal or pack boreholes or wells, particularly for constructing water wells and for consolidating water-supply well intervals with tail casing pipes under primary casing pipes.

SUBSTANCE: device has tail casing pipe head and gripper system of primary casing pipe, packing members, circlips and sub. Upper part of outer head surface is cylindrical and has left-handed thread. Lower part thereof facing well bottom is conical. Intersection point of conical surface generators lays on well axis. Gripper system of primary casing pipe is formed as a shoe having inner surface defined by two conical surfaces with apexes extending in opposite directions. Adjoining surfaces of tail casing pipe head and casing shoe have 8-10° cone angles.

EFFECT: simplified structure and improved manufacturability, increased reliability and reduced material consumption.

4 cl, 4 dwg

FIELD: oil production industry, particularly to install blocking devices inside wells.

SUBSTANCE: method involves forming nipple and coupling pipe ends having parts with taper corresponding to that of thread; forming inner conical threads on coupling pipe ends; creating outer threads on nipple pipe ends; cutting grooves on outer threaded surfaces of coupling ends and on inner threaded surfaces of nipple ends; forming annular extensions on ends of surfaces opposing threaded ones; covering the threads with mineral-and-polymeric cold-welding composition; connecting pipes one to another along with sealant application on threads; lowering the blocking device in previously expanded interval; performing radial expansion of profiled pipes, gauging profiled pipes and flaring cylindrical pipes.

EFFECT: increased reliability, workability and air-tightness.

11 dwg

FIELD: well treatment devices, particularly to stimulate oil production from wells.

SUBSTANCE: method involves creating the first and the second flows moving from well head to reservoir; injecting plugging fluid including plugging material suspended in carrier liquid so that the flow is in contact with well wall inside underground reservoir; separating carrier liquid from plugging material by liquid carrier supply through orifice row extending along the second flow path, wherein the orifices have dimensions, which permit carrier liquid passage and restrain plugging material as it touches the orifices; continuing plugging fluid up to necessary plugging material accumulation to create solid bridge; introducing reservoir treating fluid after solid bridge creation along the first fluid flow path and in contact with reservoir surface in well adjoining accumulated plugging material, which creates solid partition.

EFFECT: increased well treatment efficiency.

25 cl, 11 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to process and production technique of hydrocarbons extraction and can be implemented for insulating permeable section or idle perforated interval of well borehole. According to version 1 and 2 the procedure consists in lowering one or several packers on the flow string of the pump installation for oil extraction into the well and in seating the packers above it. According to version 1 two packers are arranged in the well borehole between a pump and permeable section or idle perforated interval, while at least one by-pass element with hydraulic channels is installed between them; also pressure tightness of the packers is checked after seating. According to version 2 one packer with two sets of packer cups and at least with one hydraulic channel between them is installed in the borehole of the well between the pump and the permeable section or idle perforated interval; also the packer is checked for tightness upon seating. According to version 3 at least two packers are lowered into the well on the string; a disconnector of the string is arranged above the upper packer; also one of the packers is landed higher, while another - lower of the permeable section or idle perforated interval, notably the string above the upper packer is disconnected from it upon seating and tightness check. An additional disconnector of the string and a well chamber with a removable element are placed between the packers.

EFFECT: reduced expenditures for operations, also reduced time for well repair, increased service life of well and underground equipment, and increased production yield.

33 cl, 9 dwg

FIELD: oil-and-gas production.

SUBSTANCE: it includes selective flow opening of section with application of washer fluid, reaming of hole, sectional descent of overlapping devices in the form of shaped tubes by opening of stratum with expansion of overlapping devices hermetic lapped in the direction top-down without constriction of internal diametre. Before opening of all interval of complicated sections it is implemented its analysis and it is defined safe length of development range, outfitted from the bottom by profile section with diametre at extension exceeding diametre of extension of the rest profiled sections. Top end of the first section of profile overlapping devise is installed higher than complicated section, and the bottom end of the last section - lower than particular section.

EFFECT: it extends functional capabilities of profiled overlapping device, it provides alignment of connected overlapping per one round-trip operation of sections of overlapping devices, increasing safety of opening of range ensured by selection of length selective flow opening, and also reduces loading at beading of connection ensured by specific implementation of profiled sections at the bottom end of overlapping sections.

3 dwg

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil and gas producing industry, particularly to facilities for well completion and can be implemented at installing shank ends-filters in directional and horizontal boreholes of wells. The facility consists of a hollow case, of a sealing unit in form of sections of collars and of a centraliser positioned above the sections of the collars. Also the centraliser located above the shank end from inside is equipped with left hand thread for positioning equipment with an over located cone guide, from outside it is equipped with lengthwise grooves. The sections of the collars are set with tightness on the case. They correspond to composed packing washers, where in between there are installed spring washers. Also diametres of washers in the sections exceed diametre of a column with arranged sections of the collars. The sections of the collars are positioned between rigid circular insertions; in insertions there are made openings for tightening rods.

EFFECT: minimal metal input and simple design reduce expenditures for fabrication of shank end and for its installation in well; packing unit of shank end compensates heat expansion of shank end and ensures reliable packing and centring in well due to axial mobility and to alternating packing heat resistant washers and steel spring washers.

2 dwg

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