FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas industry and can be implemented at development and operation of oil and gas wells for sealing their various zones. Units of sealing and anchoring are installed on rod 1 equipped with a lengthwise slot and connecting thread 3 and 4 on ends; cone 5 designed to travel lengthwise is arranged between the said units. Rotating bushing 6 with a system of shaped slots is mounted on rod 1. The sealing unit consists of packing element 12 enveloping rod 1 on sides and made out of elastic material and of stop 13 of packing element 12. The anchor unit contains cylinder sleeve 14 with pins secured onto it, the said pins enter sections of the slot system of bushing 6. The pin secured on sleeve 14 enters the lengthwise slot of rod 1. Spring loaded slip sockets 19 are attached to sleeve 14; the slip sockets are equipped with teeth 22 and decline from rod 1 in radial direction for engagement with internal walls of a casing pipe. The packer is secured to the flow column (FC) and is lowered to a place of anchoring (packing). Tube space is sealed by reverse motion of the packer in the well due to lengthwise compression of packing element 12 applying force to it with stop 13. The packer is reliably blocked in a transport position with symmetrical U-shaped sections of shaped slot system of bushing 6.
EFFECT: increased reliability and convenience of packer operation.
6 cl, 10 dwg
The invention relates to the oil and gas industry and can be used in the process of exploration and exploitation of oil and gas wells for the sealing of various areas without focusing on the slaughter.
Known mechanical packer for sealing overlapping well bore containing the piston rod, the node sealing with the sealing element, the emphasis of the sealing element and the movable cone and anchor node with the sliding gear legs (slipcase), driven movable cone (see the description of the patent RU 2092675, CL EV 33/12, publ. 10.10.97 ). When installing a packer in the working position the anchor node is driven by the hydraulic drive, which complicates its operation. Therefore, the packer of this type can be obtained in practice limited distribution.
From the description of the patent RU 2139408, CL EV 33/12, publ. 10.10.99 , the well-known mechanical packer comprising a rod with custom it system shaped grooves node sealing with a sealing element, abutting against the stop on the rod and the anchor node with the spring-loaded slipcase driven movable cone. Mechanical packer  is transferred from the transport position into the working position by lifting 0.3-0.5 m in the casing pipe and the subsequent descent. As a result of such movements slipsyspida under the action of the cone and its teeth engage the sides of the casing, and sealing element deforms and seals the annulus of the well. When moving rod packer  relative to the anchor node sections shaped notch out of the cage, they fall sludge and solid particle species, which can lead to blockages and the creation of an emergency. It should be noted that the annular groove on the rod packer , formed by sections of the curved groove, substantially reduces the cross-section of the rod, thereby weakening it and creating the danger of destruction. In addition, there is a possibility of spontaneous translation of the packer from the transport position into the working position.
One of the closest analogues of the proposed mechanical packer packer is known from the description of the patent RU 2290490, CL EV 33/128, publ. 27.12.2006 , containing the piston rod shaped groove on the outer surface. Shaped groove has a short and long alternating sections. The rod has a stop and a site seal with a sealing element, driven mounted on a rod movable cone. As the anchor node in the manifold  is used mounted on the rod with the possibility of longitudinal movement of the holder, provided with a guide pin, which is in the shape groove, and the spring-loaded slipcase, from the action drop-down cone. Surface the rod packer  is not fully protected from contact with the sludge in the process. This can lead to sticking and jamming of the parts of the packer, which is associated with an additional waste of time and money to exit such an emergency.
In addition, the rise of the packer from the well associated with the operation of unscrewing the casing. When unscrewing pipes having pipe handling not only upwards but also downwards due to the planting of the next upper tube on the wedges or the need to rasagiline columns with packer. Such movement may eventually lead to unauthorized passage of the packer into position and cause serious complications. These drawbacks reduce the reliability of packer  and inhibit its operation.
The technical result of the present invention is to improve the reliability and usability of the packer due to the possibility of full lock in the transport position.
This technical result is achieved in a mechanical packer, comprising a stem with a straight longitudinal groove installed on the stem node sealing, the anchor node and the cone located between them and with the possibility of movement along the rod and mounted for rotation and secured against longitudinal movement relative to the rod sleeve system shaped grooves having two rows of evenly spaced on okrugin the particular sections of the slots, the first series consists of long sections directed along the rod, and alternating with them short sections of the asymmetric U-shaped, and the second row consists of short sections of the asymmetric U-shaped offset around the circumference of a half step relative to the plots of the first row, both rows made one short section of a symmetrical U-shape, which are located against each other, the site contains sealing made of elastic material of the sealing element fitted stem from the sides, and located on the stem focus of the sealing element, the anchor node contains mounted on the rod with the possibility of longitudinal moving and having a cylindrical shape clip pinned in her three pins, one of which is in the straight longitudinal groove of the rod, and the other two pins are located on the same generatrix of the inner surface of the shroud, and one pin of the last two pins can enter into the plots of the first row of grooves of the sleeve, and the other pin can enter into the plots of the second row of grooves of the sleeve and on the side of the cage facing the site seal, installed spring-loaded slips held restrictive ring, which is fixed to the holder, each clips is a located along the two shoulders rod lever, one con is C which, facing the cone, the inner side has a beveled surface intended for contact with the cone, and with its outer side provided with teeth designed for anchoring, the opposite end is connected with the yoke so that slips radially deviation from the carrier, the outer side of slips has guide site intended for contact with the casing pipe.
Provides the following special cases of the execution of the invention.
Rod made of composite and has rigidly mounted thereon a sleeve, on which the mentioned rectilinear longitudinal groove.
The length of the shroud anchor node is made sufficient for full coverage of rectilinear longitudinal groove of the rod, when the packer is in its working position.
At the end of the clip anchor node in place of the exit shaft mounted seal.
The emphasis of the sealing element is designed as a separate part attached to the shaft of the packer.
The rod packer equipped with an additional section that is attached to it from the host sealing by means of a screw connection, and the emphasis of the sealing element is mounted on the rod between the sealing element and the said section of the stem.
The pin, which is rectilinear longitudinal groove of the rod, is located diametrically opposite the pins included in ascci shaped grooves of the sleeve, and the length L mentioned rectilinear longitudinal groove of the rod is determined by the ratio:
where h1- the value of the long groove system shaped grooves of the sleeve
h2- the maximum distance between the surface of the pin, which can enter into the plots of the first row of grooves of the sleeve and the end face of the sleeve, which is directed to this pin,
D is the diameter of the pin, which is included in the straight longitudinal groove of the rod.
The invention is illustrated by the following drawings.
Figure 1 - General view of the mechanical packer in the transport position, longitudinal section.
Figure 2 - the same, in the working position, the cut plane rotated by 90°.
Figure 3 - anchor node in the working position, the scale is increased.
4 is a cross section of a mechanical packer along a-a in figure 2.
Figure 5 - the same, In-In Fig 2.
6 is a sleeve with a system shaped grooves, the main view.
Fig.7 is the same, top view.
Fig - scan-side surface of the sleeve with the system shaped grooves, the case of excess pressure on the packer at the bottom.
Fig.9 is the same, the case of excess pressure on the packer at the top.
Figure 10 - the end position of the pin included in the straight longitudinal groove of the rod.
Figure 1-4 shows the packer assembled, made according to a preferred variant implementation of the invention. As can be seen from the drawings, elements stored is, connecting all the components and parts of the packer, is the rod 1 made of a metal pipe. On the rod 1 has a straight longitudinal groove 2. The ends of the rod 1 are plots 3 and 4 with connection thread, which can be used to attach the sleeves. The rod established the site seal and anchor node, between which is established a cone 5 with the possibility of movement along the rod 1. Anchor node contains mounted rotatably on the shaft 1 and sleeve 6, which is fixed on the rod 1 against axial movement (it can be installed on the rod 1 with angular contact bearings).
As shown in Fig.6-9, the sleeve 6 has a system shaped grooves consisting of two rows of evenly spaced around its circumference sections. The first row (indicated by Roman numeral I) consists of long sections 7, directed along the rod 1, alternating with short sections 8 having an asymmetrical U-shape, and the second row (indicated by Roman numeral II) consists of short sections 9, with an asymmetric U-shape. As can be seen from the drawings, the form of short sections 8 and 9 of these. One side of the U has a slope, i.e. deployed (deflected from the vertical) of approximately 30°, and the other side of each of these areas is vertical. In each of series I and II meets is one plot 10 and 11 of the U-shaped made with symmetrical inclined lateral sides, i.e. both sides of each of the sections 10 and 11 have the inclination (approximately 30°). Scheme of the scan-side surface of the sleeve 6 provided on Fig and 9, one can see that all areas 9 series II shifted by a half step relative to sections 7 and 8 series I. Long sections 7 series I, like short sections 8 number I have on the one hand partially sloping walls (rather long sections 7 have a slope with only one side of their entrance). In contrast to sections 7, 8 and 9, sections 10 and 11 are located on the sleeve 6 without bias, just against each other, i.e. on the same generatrix of the cylindrical surface of the sleeve 6. Mounted on the stem 1 of the sealing element 12 is made of elastic material such as rubber, has the shape of a hollow cylinder, the outer diameter is less than the internal diameter of the casing, which is designed packer. The inner diameter of the sealing element 12 is slightly less outer diameter of the rod 1 from the calculation of its landing on the rod 1 with tension. Support of the sealing element 12 serves as a stop 13 having the form of annular flange covering the rod 1. Ferrule 14 closes the outside of the sleeve 6 and holds the parts of the anchor node. She has a cylindrical shape and can be moved around the rod 1. Inside the cage 14 has fixed to it a pin 15, which includes the straight longitudinal groove 2 of the rod 1. In addition, inside the cage 14 has two fixed inside of the pin 16 and 17. The pin 16 can log in phases 7, 8 and 10 series I system shaped grooves and the pin 17 can log in plots 9 and 11 series II system shaped grooves. Pins 15, 16 and 17 have the possibility of movement along the grooves into which they enter. On the side of the cage 14, addressed to the node seal, installed spring-loaded by means of springs 18 slips 19, which are made in the form of metal plates two shoulders arms. Slips 19 in the middle part of its length are held on a holder 14 by means of spacing rings 20. One end of each slips 19, which is converted to cone 5 has a beveled surface 21, which is intended for contact with the conical surface of the cone 5, and is provided with teeth 22, intended for engagement with the surface of the casing. The opposite end of each slips 19 is connected with the yoke 14 so that the end of slips 19, provided with teeth 22, is the possibility of deviation from the carrier 14 in the radial direction (see figure 2 and 3). From the outside slips 19 has a guide section 23, which is intended for contact with casing pipe and centering of the packer axis of this pipe.
The stem 1 of the packer is made composite, i.e. composed of two parts (elements). He has rigidly mounted on the outer surface of the sleeve 24, which is implemented in this case be regarded as an element of the rod 1. Rectilinear longitudinal groove 2 in this case is performed on the outer surface of the sleeve 24.
The length of the clip 14 is sufficient to overlap the straight longitudinal groove 2, when the packer is in the working position, i.e. in the position when the rod 1 is ejected from the holder 14 in the direction of the anchor node at the maximum distance.
At the end of the clip 14 is installed seal 25, which protects the rubbing surface from contact with cuttings, pieces of rock and other particles.
The stop 13 of the sealing element 12 is made as a separate part fixed to the stem 1 of the packer. The stem 1 of the packer in this case is further provided with a partition 26 that is attached to it from the site sealed with screw connection and the stop 13 of the sealing element 12 is fixed on the shaft 1 between the sealing element 12 and section 26 of the rod 1.
Mechanical packer is used as follows.
Depending on the conditions in the well (upper or lower relative to the packer pressure in the annular space) the packer should be given a certain position, which is explained below.
If the work associated with excessive pressure on the packer below, before descending into the well, the packer add a vertical position, suspending the tubing string at the end, to which the DG is installed anchor node (i.e. site seal must be located under the anchor node). With the pin 16 must be installed on one of the short sections 8 number I, and the pin 17 should be at some distance from the sleeve 6 (Fig the position of the pins 16 and 17 relative to the sleeve 6 before descending indicated by the indexes PS and PS). Then begin pursing spring slips 19 to the shaft 1, to make the descent of the tubing string and packer in the well. Due to the fact that during the descent the total force of friction of the guide sections 23 clipshow 19 on the sides of the casing exceeds the force of the weight of the anchor node, the last in the initial descent of the packer remains in place, and the rod 1 with the sleeve 6 is displaced relative to the anchor node down. With the pin 16 extends from a short section 8 number of I and is at a distance from the sleeve 6, and the pin 17 is in the short area 9 series II, turning on a half sleeve 6 relative to the shaft 1 and the casing 14 (Fig the position of the pins 16 and 17 relative to the sleeve 6 marked TP1and TP1). The packer remains in the transport position. After reaching level wells scheduled for Petrovci (i.e. reach the place where you want to set the packer from the transport position into the working position), push the retainer down approximately one meter, the descent stop and perform a short (approximately is about one meter) rise in the tubing. As a result of this lifting anchor node is fixed by the action of friction forces of the guides 23 clipshow 19 on the sides of the casing remains in place, and the rod 1 with the sleeve 6 is displaced relative to the anchor node up. When the pin 17 extends from a short section 9 of the series II, and the pin 16 by turning the sleeve 6 for another half-step, included in long section 7 series II. As a result, the node sealing so approaching the ferrule 14, held spring-loaded slipcase 19 at the required level, the cone 5 is in contact with slipcase 19 breeds and their toothed ends in the radial direction from the shaft 1. As a result, the teeth 22 clipshow 19 engages with the wall of the casing. Upon further pulling of the tubing emphasis 13 compresses system: elastic element 12 - cone 5, which is accompanied by expansion of the elastic element 12 and sealed by dividing the internal volume of tubing and microbia while strengthening clutch clipshow with casing pipe. Thus, the packer is shown in operating position (on Fig the position of the corresponding pins designated as RP and RP).
After carrying out the necessary operations (e.g., pumping through tubing acid solution into the formation, etc.) translation of the packer from the working position to the transport position is as follows. The tubing serves priblizitel is but one meter down, therefore slips 19 are separated from the cone 5 and have not pressed the teeth 22 to the casing tube, the pin 16 when it comes out of the long segment of the 7 series I, and the pin 17 is in the short area 9 series II, turning on a half sleeve 6. Cone 5 moves away from the sealing element 12 and takes its original shape and dimensions. Now packer again brought into the transport position (corresponding to the position of the pins 16 and 17 on Fig marked TP2and TP2). Packer is ready to install in the new location of the well, where (after transportation), you can repeat the above described operation of anchoring (Petrovka). If no further use, the packer being in the transport position, can be extracted on the day surface. Before doing this, make several short movements tubing up and down until the pin 16 is set in short symmetric stretch 10 number I and the packer will be securely locked in the transport position.
If the work associated with excessive pressure on the packer at the top, before descending into the well, the packer add a vertical position, suspending it to the tubing at the end, which is the site of the seal (i.e. the node seal must be placed over the anchor node). In this case, before the descent of the tubing, as shown in Fig.9, the pin 17 must be set the linen on one of the short sections 9 series II, and pin 16 should be at some distance from the sleeve 6 (figure 9 the position of the pins in this moment marked PS and PS). Then, having drawn slips 19 to the shaft 1, begin lowering the packer into the well. Due to the fact that the total force of friction of the guide sections 23 clipshow 19 exceeds the force of the weight of the anchor node, the anchor node with the yoke 14 tends to remain in place, and the sleeve 6 with the rod 1 is shifted down relative to the anchor node. When the pin 17 extends from a short section 9 of series II and stops some distance away from the sleeve 6 and the pin 16 is in a short stretch of 8 series I, turning to the half sleeve 6 relative to the shaft 1 and the casing 14 (figure 9 corresponding to the position of the pins 16 and 17 are shown by indexes TP1and TP1). If the pin 16 will not be in a short section 8, and in the long section 7 number I need to make another short climb and a short lowering of the tubing string to bring the packer into the transport position. Thus, the packer is shown in the transport position and can be moved along the borehole. After reaching level wells scheduled for Petrovci (i.e. after reaching the place where you want to set the packer from the transport position into the working position), push the retainer down approximately one meter, the descent of the tubing string and packer stop and perform under the eating tubing approximately one meter. As a result of this short lifting anchor node under the action of friction of the guides 23 clipshow 19 on the sides of the casing tends to stay in place, and the sleeve 6 with the rod 1 is displaced relative to the anchor node up. When the pin 17 is in the short area 9, number I, turning the sleeve 6 at the half, and pin 16 comes out of the short section 8 of the series and I retreated to some distance away from the sleeve 6 (figure 9 the position of the pins 16 and 17 in this moment marked K and K). Then perform a short descent of the casing, in which the node sealing approaching the ferrule 14, held from displacement of the spring-loaded slipcase 19 at the required level. When the pin 17 extends from a short section 9 of series II and stops some distance away from the sleeve 6 and the pins 16, turning on a half sleeve 6 relative to the shaft 1 and the casing 14, is included in long section 7 series I (figure 9 the position of the pins 16 and 17 in this moment marked B and C). In the process a short descent tubing, due to the proximity of the site seal to the anchor node, the cone 5 is in contact with slipcase 19 and removes their toothed ends from the shaft 1 in the radial direction, the teeth 22 are in engagement with the walls of the casing, the total friction force clipshow 19 on the sides of the casing increases. This increases the axial force from the hand to the Noosa 5 slips 19. The stop 13, shift down, compresses the sealing element 12. Due to the expansion of the sealing element 12 is hermetic separation of the internal volume of the tubing and microbia while strengthening clutch clipshow with casing pipe. Now the packer is in its working position.
After the necessary technological operations translation of the packer from the working position to the transport position is as follows. The tubing serves up, so that the pin 16 out of the long segment of the 7 series I, and the pin 17 is in the short area 9 series II, turning the sleeve 6 on the half-step (figure 9 the position of the pins 16 and 17 in this moment marked TP2and TP2). Thus the cone 5 is separated from clipshow 19 and no longer carries them to the walls of the casing. Is reduced to zero the pressure cone 5 on the sealing element 12 and the latter accepts the initial dimensions and shape corresponding to the conditions of transportation of the packer in the well. After transportation of the packer to a new horizon well, where appointed its installation (Petrovka), it is necessary to repeat the above operations. If no further use, the packer can be retrieved on the surface. Before doing this, make several short movements tubing up and down until the pin 17 not mouth which becomes in a short symmetrical portion 11 of the series II and the packer will be securely locked in the transport position.
More explain the need for reliable locking the packer in the transport position before lifting on the day surface. As noted above, in practice when transporting the packers are similar to the proposed in the present invention, in the well often unplanned (spontaneous) the transition from transport to working position. It takes place during the rise of such packers attached to a long tubing string. In such cases, it is inevitable that some move column down, for example when planting tubes wedges. To protect against such undesirable cases, using the proposed packer should by additional liftings and lowerings of the packer at a distance of about one meter transfer pin 16 or pin 17 on the symmetric stretch of 10 or 11 system shaped grooves of the sleeve 6. After that, the packer will be securely locked in the transport position and no vertical movement will not lead to the disclosure of his clipshow 19. Releasing the packer in such cases enforce only after removing it from the well to the surface.
Next, explain the beneficial properties made by individual characteristics, formulated in the additional claims.
Performing a system shaped grooves on the sleeve 6 (not on stock, as known in the Academy of Sciences of the logs) can increase the reliability of the stock and simplifies repairs as in the case of wear-shaped grooves is enough to replace the bushing 6.
The implementation of the rod 1 compound and an extra supply of his sleeve 24 (attached to it) allows you to make the rod 1 is more durable in the field of rectilinear longitudinal groove 2, i.e. to increase the reliability of the rod and, consequently, the reliability of the packer. When worn straight longitudinal groove, the retaining rod 1 can be limited to replacement bushing 24.
The implementation of the shroud 14 length sufficient to overlap the straight longitudinal groove 2, and the supply end of the casing 14 by a seal 25 prevents against wear of the friction elements of the rod 1, and thus further improve the reliability of the packer.
Execution of the stop 13 of the sealing element 12 in the form of individual parts, which are attached to the stem 1 by means of an additional section 26 allows to reduce the costs associated with the manufacture and Assembly of the packer.
It should be noted that the pin 15, which is rectilinear longitudinal groove 2 of the rod 1, performs the following functions: prevents rotation of the holder 14 during rotation of the sleeve 6, compensating the reactive force produced by the rotation of the sleeve 6, prevents axial slippage of the holder 14 relative to the shaft 1 and is perceived partly axial forces arising from the weight of the anchor node and its internal friction over the spine of the casing, unloading thereby the pins 16 or 17. Of course, for the specified partial perception pin 15 axial loads from the weight of the shroud 14 and the force of friction arising from contact clipshow 19 with casing pipe, length of straight longitudinal groove 2 and its location on the rod 1 must be strictly regulated. Preferably diametrically opposite the location of the pins 16 and 17 relative to the pin 15 on the inner cylindrical surface of the shroud 14 of the anchor node.
For achieving the above mentioned simultaneous action of axial load on pins 15 and 17 or on pins 15 and 16 (depending on the position of the packer anchor node up or down) must meet the following relationship:
L=h1+h2+D; where L is the length of straight longitudinal groove 2 of the rod 1, h1- the value of long segment 7 system shaped grooves of the sleeve 6, h2- the maximum distance between the surface of the pin 16 and the end face of the sleeve 6, is directed to this pin and D is the diameter of the pin 15, which is rectilinear longitudinal groove 2 of the shaft 1 (see figure 10).
Was manufactured prototype described above packer, which showed good results in laboratory testing and in production environments.
The list of elements and details
2. rectilinear longitudinal groove stock,
3. connecting the threads on the rod end,
4. connection thread at the ends of the rod,
6. sleeve system shaped grooves
7. long section number I
8. a short segment number I,
9. short plot series II
10. the plot is symmetrical U-shaped, number 1,
11. the plot is symmetrical U-shaped, number II,
12. the sealing element
13. the emphasis of the sealing element 12,
14. clip anchor node
15. pin straight longitudinal groove 2 of the rod 1,
16. pin number I
17. pin number II,
18. spring clips 19,
20. restrictive ring for clipshow 19,
21. the beveled surface slips 19,
22. teeth slips 19,
23. the guide section slips 19,
24. sleeve with prodelin. groove 2, mounted on the rod,
25. the seal on the end of the clip 14,
26. additional section of the rod 1.
The I-th row of grooves, the second series of grooves.
Reduction Fig and 9: TP - transport position, RP - working position, PPP - position of the pin before lowering the packer into the well, KP - short rise packer.
1. Mechanical packer comprising a stem with a straight longitudinal groove installed on the stem node sealing, the anchor node and the cone located between them and with the possibility of movement along the rod and mounted for rotation and secured against longitudinal movement relative to the current bushing system shaped grooves, having two rows of evenly spaced around the circumference of the sections of the grooves, and the first series consists of long sections directed along the rod, and alternating with them short sections of the asymmetric U-shaped, and the second row consists of short sections of the asymmetric U-shaped offset around the circumference of a half step relative to the plots of the first row, both rows made one short section of a symmetrical U-shape, which are located against each other, the site contains sealing made of elastic material of the sealing element fitted stem from the sides, and located on the stem focus of the sealing element, anchor node contains mounted on the rod with the possibility of longitudinal movement and having a cylindrical shape clip pinned in her three pins, one of which is in the straight longitudinal groove of the rod, and the other two pins are located on the same generatrix of the inner surface of the shroud, and one pin of the last two pins can enter into the plots of the first row of grooves of the sleeve, and the other pin can enter into the plots of the second row of grooves of the sleeve and on the side of the cage facing the site seal, installed spring-loaded slips held restrictive ring, which is fixed to the holder, each slip represent a located along two shoulders rod lever, one end of which, facing the cone, the inner side has a beveled surface intended for contact with the cone, and with its outer side provided with teeth designed for anchoring, the opposite end is connected with the yoke so that slips radially deviation from the carrier, the outer side of slips has guide site intended for contact with the casing pipe.
2. Mechanical packer according to claim 1, characterized in that the length of the shroud anchor node is made sufficient for full coverage of rectilinear longitudinal groove of the rod, when the packer is in its working position.
3. Mechanical packer according to claim 1, characterized in that at the end of the clip anchor node in place of the exit shaft mounted seal.
4. Mechanical packer according to claim 1, characterized in that the emphasis of the sealing element is designed as a separate part attached to the shaft of the packer.
5. Mechanical packer according to claim 4, characterized in that the rod packer equipped with an additional section that is attached to it from the host sealing by means of a screw connection, and the emphasis of the sealing element is mounted on the rod between the sealing element and the said section of the stem.
6. Mechanical packer according to claim 1, characterized in that the pin, which is rectilinear longitudinal groove of the rod is,
located diametrically-opposite pins within areas shaped grooves of the sleeve, and the length L mentioned rectilinear longitudinal groove of the rod is determined by the ratio
where h1- the value of the long groove system shaped grooves of the sleeve;
h2- the maximum distance between the surface of the pin, which can enter into the plots of the first row of grooves of the sleeve and the end face of the sleeve, which is directed to this pin;
D is the diameter of the pin, which is included in the straight longitudinal groove of the rod.
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 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.
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.
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
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.
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.
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.
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.
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 extractive industry.
SUBSTANCE: packer has body in form of pipe, whereon collar compactors are placed with limiting washers, saddles for locking tool dropped from surface, cover, upper and lower fixing elements, made in form of anchoring assemblies, upper conical bushing, rigidly connected to pressing bushing and movably to the body, lower conic bushing, made rigidly together with body, guide of this conic bushing made in form of plate spring, placed by one end moveably in guiding groove in lower portion of lower die with teeth, and by other end fixed rigidly on greater diameter of this conic bushing, auxiliary pipe, placed inside the body. Packer in lower portion is provided with check valve, placed inside recess of body, concurrently being also the body of valve. Oppositely to valve saddle on same axis stepped locking bushing is placed with possible sliding inside body recess with limited drive and possible overlapping of radial grooves made in body, which, in its turn, is rigidly connected to auxiliary pipe via shear pin. Between stepped locking bushing and saddle compression spring is placed. Fixing elements of collar compactors are made in form of comb with inner teeth and outer conic generators in nose portion. On the side of collar compactors these are enveloped by inner conic portion of compression bushing, in its turn rigidly connected to upper conic bushing, and on the other side combs with inner teeth are placed sliding-moveably in radial grooves of guiding bushing placed between ends of upper conic bushing and inner conic portion of compression bushing with possible engagement by inner teeth of comb to slanting walls of body groove and interaction to all elements of this assembly.
EFFECT: higher reliability.
FIELD: oil and gas extractive industry.
SUBSTANCE: system has upper and lower packers, each of which has body, shaft, anchor, compactors, and pipes, placed between packers. In shaft of upper packer a copier is made with fixing device of transporting and working position of anchor and a sub. The latter is mounted with possible axial displacement and rotation around the copier. Sub is placed on pipes between packers, mated to lower packer and has no capability for axial rotation and displacement relatively to their axis in operating position of lower packer. On lower packer shaft a copier is made with possible axial displacement with it for interaction with anchor and its displacement from transporting position to operation position.
EFFECT: simplified construction, broader functional capabilities.
FIELD: oil and gas industry.
SUBSTANCE: stand has imitators of casing and lifting columns with packer between them, means for heating casing column imitator, main hydraulic cylinder for axial loading and unloading of packer, pumps to create pressure. Stand is provided with additional hydraulic cylinder with hollow rod and cylinder, connected to rod of min hydraulic cylinder. Additional hydraulic cylinder is encased in the body, rigidly connected to main hydraulic cylinder and imitator of casing column. In additional hydraulic cylinder a ring-shaped piston is placed with conical skirt, interacting with keys with possible periodical supporting against the body through windows in said cylinder and below keys spring-loaded ring-shaped pusher is moveably mounted. In hollow of imitator of lifting column a floating piston is positioned, this hollow and hollow of the hollow rod are interconnected and also connected to hollow above ring-shaped piston.
EFFECT: broader functional capabilities, higher efficiency.
FIELD: oil and gas extractive industry.
SUBSTANCE: device includes hollow body with a row of vertical apertures, a collar, pusher bushing, placed on body with possible interaction with collar, cone, mounted on the body, cylinder, connected to cone, screw-thread dies with die holder, mounted on the body with possible extension of dies in radial direction during interaction with cone, saddle and shear screws. According to invention in die holder additional through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Inner hollow of die holder is connected to inner hollow of body by a row of radial apertures. In pusher bushing through radial apertures are made, wherein sockets are mounted with possible extension in radial direction. Pusher bushing is rigidly fixed to the body, and its inner hollow is connected to inter-tubular space below the collar.
EFFECT: higher reliability, durability and lower cost.
FIELD: oil industry.
SUBSTANCE: device has body with radial apertures, two compacting assemblies thereon and valve assembly between them. Each compacting assembly comprises a collar, stopping branch pipe, cylinder, forming a ring-shaped hollow with the body, wherein a bushing is placed. In upper compacting assembly ring-shaped hollow is covered by plug from lower side, which is fixed in cylinder and interacts with collar, cylinder is connected to body by cams, placed in radial apertures of plug and in ring groove of body, bushing is made stepped, long step of which interacts with cams and is fixed by shear screws from displacement in ring plane, which is connected to well. In lower compacting assembly bushing is provided with holder, on the body a cone is mounted, interacting with sockets, placed in grooves of stopping branch pipe, which is fixed on the body by shear screws.
EFFECT: higher reliability.
2 cl, 4 dwg
FIELD: oil and gas industry.
SUBSTANCE: device has shaft with radial channels and return valve, upper and lower compacting elements. Inside the shaft a hollow spring-loaded moving rod is placed. It has radial apertures and recesses. Between apertures a throttle is rigidly placed. On upper portion of rod a piston is placed. Working hollow, formed between rod with piston and barrel, fixed on inner portion of shaft, is connected to above-packer space of well by radial aperture, made in barrel wall. Working hollows of upper and lower compacting elements are connected by axial channel, made in shaft and ring channel, formed between inner and outer pipes, connecting lower compacting element to the shaft. On upper portion of pipe through radial apertures are made and cylindrical recess, matching rod diameter, in which rod a plug is place. Outer diameter of upper end portion of rod equals outer diameter of lower rod portion.
EFFECT: higher reliability.
FIELD: oil and gas industry.
SUBSTANCE: packer has body, in which electric engine, reducer with output shaft, connected to screw couple, which is connected to traction, having holding rods on lower portion with spring for transfer of axial force to central rod, having a shelf in upper portion as well as recess and cuts, and in inner portion - compacting rings and stopping nut, are positioned. Packer has shell, having conical surface on inner portion, special part with shelves, shear ring placed in grooves of said special part and holding segments, immobile bushing connected fixedly to special part. Packer has packer rubber, saddle, rigidly connected to special part, moveable flange and two cones, placed oppositely to each other, dies, moveably placed on cones, traction, jointly connected to dies, branch pipe, fixedly placed on body, moveable bushing, balls, pressed by spring and screw for connection of special part to shell, cable of rope, being a carrying cable and feeding electric engine via filament, shear washer, pressed by nut. When packer is removed, engaging assembly is utilized, which includes pusher, screwed on lower portion of screw couple screw, cut holder and cover. Through apertures are made on special part and moveable flange for connection of above-packer and below-packer well hollows.
EFFECT: lower costs and simplified maintenance.
FIELD: oil production industry, particularly means for dividing an annular space and a tube space in flowing, gaslift, and beam wells.
SUBSTANCE: packer includes shaft with outer bored surface and bead and sealing members supported by the bead. Packer also has air cylinder forming annular cavity together with packer shaft. Cavity is connected with shaft interior through radial channels. Packer includes anchoring means. Lower anchoring means includes cone with slips and slip holder having bored inner orifice and threaded orifices. Lower anchoring means rests upon the bead and is connected to the shaft by shear screws installed in threaded orifices of slip holder. Shaft defines inner bored diameter and includes sliding bush located inside shaft. Shaft is provided with lower and upper grooves for sealing rings receiving and with outer grooves for cams and additional shear screws installation. Outer grooves are located between lower and upper ones. Slots are formed below bead on outer shaft surface for installing cams with limited radial travel. Threaded orifices are formed on outer shaft surface above inner groove thereof. Arranged into groove are additional shear screws to secure sliding bush in its initial position. The slip holder is freely installed on shaft or is spring-loaded. Support-moving bush is installed in inner bored orifice of slip holder between shear screws and cams. Support-moving bush is provided with facet formed from cam side and contacts with cams along mating facets upon shearing of shear screws. Free travel between cams and end of support-moving bush exceeds shear screw diameters to provide shearing thereof. When sliding bush is installed in fixed position cams extend above an outer shaft surface generator to provide displacement of support-moving bush and cut of shear screws. When sliding bush is located in operating position cams are located below outer shaft surface generator and move in radial direction into outer groove of sliding bush to provide free cam movement under support-moving bush and shear screws.
EFFECT: reduced number of lowering and lifting operations and breakdowns in the case or packer separation or during packer pulling out of well.
18 cl, 7 dwg
FIELD: oil and gas industry.
SUBSTANCE: device has body, made in form of branch pipe with elastic collar mounted on it, expanding assembly with cone, shear element, gear, lowered on pipes column into additional casing column and interacting with expanding assembly from above. Expanding element is positioned in upper portion of branch pipe and locked with its cone directed downwards, gear is made in form of pusher in lower portion and anchor assembly in upper portion. Pusher is made in form of hydraulic cylinder, made with possible pressure from above on expanding assembly and provided with piston and hollow rod, which is connected to piston rigidly, and to pipes column - hermetically with possible upward axial displacement. Anchor assembly is made in form of dies, mounted on hollow rod with possible radial movement outwards during movement of hollow rod upwards relatively to pipes column. Shear element holds hollow rod relatively to pipes column during lowering into well.
EFFECT: simplified construction, lower costs.
FIELD: mining industry.
SUBSTANCE: device has packer, mounting tool and anchor assembly. Packer expander is mounted in upper portion of body, and anchor assembly - above hydraulic chamber of mounting tool. Hydraulic chamber cylinder is mounted with possible displacement relatively to rod and hydraulically connected to inner space of device. Body of anchor assembly is provided with sockets, in which spring-loaded dies are mounted, which are activated by hydraulic effect formed in tubing pipes column, on which device is lowered into well.
EFFECT: simplified construction, higher reliability, higher efficiency.