US20150252659A1 - Hydraulic fracturing process and corresponding equipment - Google Patents
Hydraulic fracturing process and corresponding equipment Download PDFInfo
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- US20150252659A1 US20150252659A1 US14/432,658 US201314432658A US2015252659A1 US 20150252659 A1 US20150252659 A1 US 20150252659A1 US 201314432658 A US201314432658 A US 201314432658A US 2015252659 A1 US2015252659 A1 US 2015252659A1
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- conduit
- equipment
- tubular element
- opening
- rings
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- 238000000034 method Methods 0.000 title description 16
- 239000011435 rock Substances 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- XMHIUKTWLZUKEX-UHFFFAOYSA-N hexacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O XMHIUKTWLZUKEX-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
- E21B33/1243—Units with longitudinally-spaced plugs for isolating the intermediate space with inflatable sleeves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/16—Control means therefor being outside the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
-
- E21B2034/002—
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Definitions
- the invention relates to a hydraulic fracturing equipment.
- chaining the different fracturing phases may not be done necessarily linearly from the bottom up (that is, from the downstream side of the well to the upstream). In fact, it can be advantageous to consider the nature of the terrain and the success or absence of success of fracturing in progress.
- the aim of the present is to respond to this demand.
- the invention relates to hydraulic fracturing equipment of the rock of a well by which it is possible to execute a fracturing process.
- This hydraulic well-fracturing equipment is characterised in that it comprises, on the one hand:
- FIG. 1 is a partial and simplified view, in longitudinal and vertical section, of the horizontal portion of a drilling well wherein the aim is to carry out hydraulic fracturing of the rock, and of a conduit introduced therein;
- FIG. 2 is a view similar to the preceding one, but shown over a greater length of well;
- FIG. 3 is a view in perspective of a sleeve which equips the conduit of the preceding figures;
- FIG. 4 is a simplified view, in vertical and longitudinal section, of a tubular element which forms part of the hydraulic fracturing equipment according to the present invention
- FIG. 5 is a view similar to FIG. 1 , the tubular element of FIG. 4 also being shown;
- FIGS. 6 and 7 are views similar to FIG. 5 showing two successive steps for carrying out a hydraulic fracturing process
- FIG. 8 is substantially identical to FIG. 1 and shows a variant embodiment of a conduit in place in the horizontal portion of a well;
- FIG. 9 is a view similar to FIG. 2 ;
- FIG. 10 is a view similar to FIG. 4 , showing a variant embodiment different to the tubular element
- FIGS. 11 , 12 and 13 show the different steps taken to attain fracturing of the rock by using the conduit and tubular element of FIGS. 8 and 10 ;
- FIGS. 14 and 15 show other embodiments of the apparatus of the device according to the invention.
- FIGS. 16 to 18 illustrate the different steps taken to carry out hydraulic fracturing of the rock of a well, by means of the variant embodiment of FIGS. 14 and 15 .
- FIGS. 19 and 20 on the one hand, 21 and 22 on the other hand, are views which further illustrate execution of a fracturing process by making use of two more additional variants.
- FIGS. 23 and 24 on the one hand, 25 and 26 on the other hand, are views of two more variant embodiments of such a process
- FIG. 27 is a view similar to FIG. 26 , but showing a greater length of conduit.
- this horizontal portion is attached to a vertical portion terminating in open air via an intermediate portion substantially in an arc of a circle (not shown).
- this well A is shown as constituting a perfect cylinder.
- fracturing fluid is circulated in the well from the apex to the base, from upstream to downstream.
- this therefore relates to a portion of well in which containing a metal conduit 1 which has a substantially cylindrical form and which is, for example, kept in place according to the axis X-X′ of the well by deformable end sockets which rest against the walls of the well.
- a metal conduit 1 which has a substantially cylindrical form and which is, for example, kept in place according to the axis X-X′ of the well by deformable end sockets which rest against the walls of the well.
- the conduit comprises along its external face at least one pair of expandable metallic tubular sleeves referenced 2 .
- a single pair of these sleeves 2 is seen in FIG. 1 .
- the distance separating them can, for example, be of the order of a metre.
- conduit measures 12 m long, it is possible to position one hundred pairs of metallic sleeves 2 over a length of 1200 m of conduit.
- the conduit 1 has, opposite each sleeve 2 , at least one opening 10 , called “first opening” which enables communication between the internal space of the conduit 1 and the space delimited by this conduit and each sleeve 2 .
- a single opening 10 is shown in the figures and still for the sake of clarity. In practice, this can be a set of several openings 10 , for example distributed according to circular arrangement which is spaced uniformly and angularly.
- metallic sleeves 2 comprise relatively ductile metallic material and are connected solidly to the conduit 1 at the level of their ends 20 , for example by crimping, by means of screws or by any other fixing means known to the expert, which produce faultless sealing between these ends 20 and the wall of the conduit 1 .
- the conduit comprises at least one other opening 3 , known as “second opening”, which puts the internal space of the conduit 1 in communication with the interior of the well A, and not, as the openings 10 , with the interior of the tubular sleeves 2 .
- second opening which puts the internal space of the conduit 1 in communication with the interior of the well A, and not, as the openings 10 , with the interior of the tubular sleeves 2 .
- the opening 10 also applies for the opening 3 with respect to their number and their arrangement.
- conduit is provided along its external face and covering the second opening 3 with an expandable metallic sleeve 30 which is capable of breaking under the effect of internal predetermined pressure, as will be evident hereinbelow.
- At least one mechanical weakening zone such as that illustrated by reference 31 and for example made by removing material, can be provided in this wall.
- This sleeve especially is being able to break under the effect of predetermined pressure in its internal space. It advantageously has a sinuous path, such that once broken, the corresponding opening will be the widest possible.
- the sleeve 30 is fixed to the conduit by the same means as those of the sleeves 2 .
- This sleeve can be advantageously provided to have an elongation rate less than that of the sleeves 2
- this shows the presence, downstream of the sleeve 2 arranged to the right (that is, downstream of the conduit), of an annular throat 11 formed in the internal wall of the conduit 1 and which terminates inside the latter.
- the fracturing equipment comprises a tubular element 4 a possible embodiment of which is illustrated in FIG. 4 .
- the diameter of this tubular element is less by approximately half that of the conduit.
- the wall of this tubular element 4 comprises at least one through-hole 43 .
- these through-holes 43 are arranged, in the longitudinal direction of the element substantially at mid-length, so as to be able to be placed opposite the openings 3 of the conduit 1 , as will be evident hereinbelow.
- deformable rings 6 which are capable of being applied hermetically against the internal face of the conduit, as will be evident hereinbelow.
- deformable rings of known type, for example in the form of packers capable of being deployed on demand, to be placed against the internal wall of the conduit 10 while producing sealing at this level. They are positioned and fixed to the element 4 by any means known to the expert, for example inside a throat, between two pieces screwed together.
- the deformable rings can be cup packers D, that is, lip joints activated by the liquid flow originating for example from the interior of the tool 4 via the orifices 43 , in the annular region where they extend.
- a particular feature of this embodiment is the fact that there are only two rings 6 whereof the mutual distance is close to the distance from the upstream end 20 of the first sleeve 2 to the downstream end 20 of the second sleeve.
- a blocking system 44 is preferably provided at the downstream end of the tubular element 4 .
- this is a system comprising a ball valve 41 , the operation of which will be explained later on in the description.
- the external wall of the tubular element 4 is provided with immobilisation means 7 (illustrated schematically) of this element vis-à-vis the conduit 1 , these means 7 being provided with at least one element 70 projecting peripherally intended to cooperate with the above groove 11 .
- immobilisation means 7 illustrated schematically of this element vis-à-vis the conduit 1 , these means 7 being provided with at least one element 70 projecting peripherally intended to cooperate with the above groove 11 .
- These are for example ergots arranged radially relative to the element 4 , which tend to be directed towards the exterior under the effect of a spring, not illustrated.
- FIGS. 8 to 11 The embodiment in FIGS. 8 to 11 is very similar to the preceding one. Unless expressed otherwise hereinbelow, the elements common to these two variants will not be described a second time.
- the conduit of FIG. 8 is identical in all aspects to that of FIG. 1 , if only devoid of sleeve 30 . In these conditions the opening 3 is directly in contact with the exterior of the conduit 1 .
- a particular feature of the element 4 of FIG. 10 is that it comprises two rings 6 arranged on either side of each of the orifices 42 , or four in total.
- FIG. 10 relates to an opening 43 which, as illustrated in FIGS. 10 and 11 , is blocked by a closing member 5 directed axially.
- the latter is capable of moving from a closing position to an opening position under the effect of a rise in pressure in the tubular element 4 without opposing the passage of fluid.
- this relates to a hollow piston 50 retracted into a closing position by elastically deformable means such as a helicoidal spring 51 , supported against an annular stop 52 positioned inside the element 4 .
- elastically deformable means such as a helicoidal spring 51
- FIGS. 14 and 15 The embodiment illustrated in FIGS. 14 and 15 is similar to the preceding one.
- conduit 1 it is evident that this relates to not only a first throat or groove 11 , but also an identical second groove 12 offset longitudinally (towards downstream) of the preceding one.
- tubular element 4 illustrated in FIG. 15 differs from the preceding one by the absence of the associated opening member 43 and, of course, closing member 5 .
- tubular element 4 is unchanged relative to the variant of FIG. 5 .
- conduit 1 comprises a single annular throat 11 , as in the embodiment of FIGS. 1 and 8 .
- FIGS. 23 and 24 relate to equipment similar to that of FIG. 5 . However, as will be evident hereinbelow, their mode of use changes.
- this process consists of injecting fracturing fluid F under predetermined pressure P 1 into the conduit 1 , this fluid being funnelled into the first openings 10 only communicating with the sleeves 2 .
- This pressure is selected such that it is sufficient to cause expansion of the sleeves 2 in the direction of the wall of the well A, so that it is applied hermetically against this wall.
- fluid is injected under fracturing pressure P 2 different to the first pressure P 1 inside the conduit. This fluid is funnelled into the first openings 10 and second openings 3 such that the same pressure P 2 prevails on either side of the wall of the sleeves 2 .
- the tubular element 4 is positioned with its downstream end open, that is, without the latter being blocked, to allow free circulation of liquid present in the well.
- liquid containing a ball which, once in place blocks the valve 41 of the blocking means 44 , is sent under first reference pressure.
- the immobilisation of the tubular element 4 relative to the conduit 1 is ensured by the means 70 with projecting element(s) which have the capacity to be retracted to slide along the internal wall of the conduit 1 and be engaged and immobilised inside the annular groove 11 of the conduit 1 .
- This liquid circulates through the openings 43 and 10 , which deforms the metallic sleeves 2 such that their wall is applied against that of the well A to form a tight joint.
- fracturing pressure P 2 balances out on either side of the deformed wall of the sleeves 2 , which implements fracturing in a particularly targeted tight manner without risk of transmission of the fracturing to a zone which would not be opposite that intended.
- FIGS. 8 and 10 The execution of the variant of FIGS. 8 and 10 is relatively similar to what has just been described.
- the element 4 is immobilised while the first openings 10 of the conduit 1 are opposite the openings 42 of the tubular element, whereas the second openings 3 of the conduit 1 are opposite the opening 43 of the element 4 .
- this first pressure P 1 is insufficient to move the hollow piston of the member 5 , such that the openings 43 are blocked.
- the fracturing pressure P 2 balances out on either side of the deformed wall of the sleeves 2 , which implements fracturing in a particularly targeted tight manner without risk of transmission of the fracturing to a zone which would not be as opposite that intended.
- tubular element 4 is devoid of openings 43 .
- this tubular element 4 is positioned so that the mutual immobilisation means 7 are wedged opposite the first peripheral groove 11 .
- the rings 6 of the element 4 are then positioned such that they allow communication of the interior of this element with the openings 10 and 3 of the conduit 1 .
- the pressure P 2 can circulate through the abovementioned openings so as to cause fracturing under pressure P 2 which is balanced on either side of the wall of the sleeves 2 .
- FIGS. 19 and 20 is relatively similar to the preceding one, if only shifting of the element 4 from the first to the second longitudinal position is no longer done by means of the two annular grooves 11 and 12 , but from the region of minimal thickness 13 whereof the ends 130 and 131 constitute stops for the means 7 .
- the fracturing can be carried out in the same way as in the preceding embodiment.
- this relates to a conduit similar to that illustrated in FIG. 5 .
- the sleeve 30 has the particular feature of being provided to break under pressure greater than the expansion pressure P 1 of the sleeves 2 . However, it can be less than the fracturing pressure P 2 .
- the interior of the conduit 1 is subjected to said pressure P 1 such that the fluid is funnelled into the openings 10 .
- the element 4 is placed such that the rings 6 are now opposite the upstream ends of the sleeve 2 located to the left of Figure, and downstream of the sleeve 2 located to the right of the figure.
- FIGS. 25 and 26 contains beforehand a step identical to that of FIG. 23 .
- this prior step therefore deforms the sleeves 2 without affecting the sleeve 3 .
- the element 4 is then slid from upstream to downstream, such that neither of the rings 6 is situated opposite the sleeves 2 .
- Fluid is injected under fracturing pressure P 2 into the element 4 so as to fracture the rock. Simultaneously, the same pressure is sent to the annular space which separates the conduit 1 from the element 4 to create pressure equilibrium on either side, capable of avoiding any collapse phenomenon of the wall 4 .
- FIG. 27 shows the importance of having exploding pressure P 3 (rupture) of the sleeve 3 , which is greater than fracturing pressure.
- P 3 rupture
Abstract
The present invention relates especially to a hydraulic fracturing equipment of the rock of a well (A), characterised in that it comprises, on the one hand: a conduit (1) provided along its external face with at least one pair of expandable metallic tubular sleeves (2) fixedly, connected to the conduit (1), this conduit having opposite each sleeve (2) at least one opening (10) known as “first opening” to put the internal space of the conduit (1) in communication with the space delimited by the latter and each sleeve (2), and opposite the space separating the two sleeves (2) of a same pair at least one other opening (3), known as “second opening” for putting the internal space of the conduit (1) in communication with the interior of the well (A); a tubular element (4) of diameter provided to allow it to be engaged in said conduit (1), such that there is a free annular space between them; the wall of this tubular element (4) comprising at least one first through-hole (42); the wall being also provided externally with at least two deformable rings (6) located on either side of said first orifice (42), capable of being applied hermetically against the internal face of said conduit (1).
Description
- The invention relates to a hydraulic fracturing equipment.
- In terms of hydraulic fracturing technique, the entire profession is in agreement in considering that fracturing is efficacious and controlled when the fractured zone which supports the pressure is not long.
- Also, the fact of fracturing a small zone at the same time limits the surface impact of fracturing equipment (fewer pumps, etc.).
- Also, there is a need for better control of parameters put in place so that the fracturing campaign proceeds best.
- So it is important to modify the fracturing program in progress, as a function of the resulting partial parameters. For instance, following a seismic survey it can be decided to stop the fracturing in progress, to then resume it two zones further on, etc.
- Of course, for economic and ecological reasons the aim is to reduce the consumption of water and support agents (“proppant” in English), and to avoid any risk of polluting surrounding layers by fracture propagation.
- It can also be requested that chaining the different fracturing phases may not be done necessarily linearly from the bottom up (that is, from the downstream side of the well to the upstream). In fact, it can be advantageous to consider the nature of the terrain and the success or absence of success of fracturing in progress.
- Being able to fracture new zones several years after the first instances of fracturing have been completed is also requested.
- Naturally, it is also necessary for the fracturing sealing in progress to be faultless, without risk of fracturing the adjacent zone and for this technique to be secure and low-cost to carry out.
- The aim of the present is to respond to this demand.
- So the invention relates to hydraulic fracturing equipment of the rock of a well by which it is possible to execute a fracturing process.
- This hydraulic well-fracturing equipment is characterised in that it comprises, on the one hand:
-
- a conduit provided along its external face with at least one pair of expandable metallic tubular sleeves fixedly, connected to the conduit, this conduit having opposite each sleeve at least one opening, known as “first opening” for having the internal space of the conduit communicate with the space delimited by the latter and each sleeve, and opposite the space separating the two sleeves of a same pair at least one other opening known as “second opening”, for having the internal space of the conduit communicate with the interior of the well;
- a tubular element of a diameter provided to have it engage in said conduit such that there is a free annular space between them;
- the wall of this tubular element comprising at least one first through-hole;
- the wall being also provided externally with at least two deformable rings located on either side of said first orifice, capable of being applied hermetically against the internal face of said conduit.
- According to other non-limiting and advantageous characteristics of this equipment, taken separately or according to any combination:
-
- the distance between the deformable rings is greater than the distance separating said first openings from said conduit;
- at least two first through-holes are arranged in the longitudinal direction of the element according to two zones whereof the mutual distance is substantially equal to that of the first openings of said conduit;
- the means which prevent said fluid which is funnelled into said second opening from terminating in the space separating the two sleeves consist of a sleeve with sealed ends, fixed on the external wall of said conduit, sleeve which is capable of breaking under predetermined pressure known as “breaking pressure”;
- said tubular element comprises at least one second orifice and two pairs of rings, the second orifice being located between the rings opposite the two pairs of rings;
- the two rings are arranged on either side of said first orifices;
- the rings of a same pair are separated longitudinally by a distance greater than that which separates the first and the second openings of said conduit;
- said tubular element comprises means capable of blocking its downstream end;
- said means comprise a valve;
- said conduit and said tubular element have mutual immobilisation means;
- said valve is coupled to said mutual immobilisation means such that said valve blocks said end only when said immobilisation means cooperate;
- said tubular element comprises at least one second orifice located between the rings opposite the two pairs of rings;
- said second orifice is provided with a closing member directed axially, which moves from a closing position to an opening position under the effect of a rise in pressure without opposing the longitudinal passage of fluid;
- said member comprises a hollow piston retracted into a closing position by elastically deformable means such as a spring;
- said conduit and said tubular element have mutual immobilisation means in two distinct positions offset longitudinally;
- said means are arranged so as to allow shifting from one position to the other distinct position by sliding of said tubular element relative to said conduit.
- Other characteristics and advantages of the invention will emerge from the following detailed description. Reference is made to the attached diagrams, in which:
-
FIG. 1 is a partial and simplified view, in longitudinal and vertical section, of the horizontal portion of a drilling well wherein the aim is to carry out hydraulic fracturing of the rock, and of a conduit introduced therein; -
FIG. 2 is a view similar to the preceding one, but shown over a greater length of well; -
FIG. 3 is a view in perspective of a sleeve which equips the conduit of the preceding figures; -
FIG. 4 is a simplified view, in vertical and longitudinal section, of a tubular element which forms part of the hydraulic fracturing equipment according to the present invention; -
FIG. 5 is a view similar toFIG. 1 , the tubular element ofFIG. 4 also being shown; -
FIGS. 6 and 7 are views similar toFIG. 5 showing two successive steps for carrying out a hydraulic fracturing process; -
FIG. 8 is substantially identical toFIG. 1 and shows a variant embodiment of a conduit in place in the horizontal portion of a well; -
FIG. 9 is a view similar toFIG. 2 ; -
FIG. 10 is a view similar toFIG. 4 , showing a variant embodiment different to the tubular element; -
FIGS. 11 , 12 and 13 show the different steps taken to attain fracturing of the rock by using the conduit and tubular element ofFIGS. 8 and 10 ; -
FIGS. 14 and 15 show other embodiments of the apparatus of the device according to the invention; -
FIGS. 16 to 18 illustrate the different steps taken to carry out hydraulic fracturing of the rock of a well, by means of the variant embodiment ofFIGS. 14 and 15 . -
FIGS. 19 and 20 on the one hand, 21 and 22 on the other hand, are views which further illustrate execution of a fracturing process by making use of two more additional variants. -
FIGS. 23 and 24 on the one hand, 25 and 26 on the other hand, are views of two more variant embodiments of such a process; -
FIG. 27 is a view similar toFIG. 26 , but showing a greater length of conduit. - In the attached figures and for the sake of clarity, only one fraction of the horizontal part of a hydraulic fracturing well A has been shown.
- It is of course possible for this horizontal portion to extend over a considerable length. It is attached to a vertical portion terminating in open air via an intermediate portion substantially in an arc of a circle (not shown).
- Likewise for reasons of simplification, this well A is shown as constituting a perfect cylinder.
- This is of course a matter of opinion since its wall, approximately cylindrical, can have a large number of local deformations.
- For all the figures, it is considered that the “apex” of the well (terminating in open air) is located to the left of the figures and its base to the right.
- As will be evident hereinbelow in the description, fracturing fluid is circulated in the well from the apex to the base, from upstream to downstream.
- With reference to
FIG. 1 , this therefore relates to a portion of well in which containing ametal conduit 1 which has a substantially cylindrical form and which is, for example, kept in place according to the axis X-X′ of the well by deformable end sockets which rest against the walls of the well. Any other means known to the expert which auto-centres theconduit 1 relative to the size of the well, can be envisaged. The expert can also determine the optimal diameter of theconduit 1 to cerate around the latter a free annular space which separates the external wall of the conduit from the wall of the well once it is put in place in the well. - As shown in
FIG. 1 , the conduit comprises along its external face at least one pair of expandable metallic tubular sleeves referenced 2. - A single pair of these
sleeves 2 is seen inFIG. 1 . The distance separating them can, for example, be of the order of a metre. - However, in reference to
FIG. 2 where several ofconduit 1 have been assembled and fixed end-to-end, the presence of three pairs ofsleeves 2 referenced n, n-F1 and n+2 is clear. - By way of indication, if each portion of conduit measures 12 m long, it is possible to position one hundred pairs of
metallic sleeves 2 over a length of 1200 m of conduit. - As will be evident later on, this will produce 100 different instances of fracturing, each spaced 12 m.
- Still in reference to
FIGS. 1 and 2 , it is evident that theconduit 1 has, opposite eachsleeve 2, at least oneopening 10, called “first opening” which enables communication between the internal space of theconduit 1 and the space delimited by this conduit and eachsleeve 2. Asingle opening 10 is shown in the figures and still for the sake of clarity. In practice, this can be a set ofseveral openings 10, for example distributed according to circular arrangement which is spaced uniformly and angularly. -
Several openings 10 placed according to staggered distribution, or other, are also possible. As is well known,metallic sleeves 2 comprise relatively ductile metallic material and are connected solidly to theconduit 1 at the level of theirends 20, for example by crimping, by means of screws or by any other fixing means known to the expert, which produce faultless sealing between theseends 20 and the wall of theconduit 1. Substantially at mid-distance from the space separating two sleeves of a same pair n, n-F1 or n+2, the conduit comprises at least oneother opening 3, known as “second opening”, which puts the internal space of theconduit 1 in communication with the interior of the well A, and not, as theopenings 10, with the interior of thetubular sleeves 2. Of course, what has been said for theopening 10 also applies for theopening 3 with respect to their number and their arrangement. - However, the conduit is provided along its external face and covering the
second opening 3 with an expandablemetallic sleeve 30 which is capable of breaking under the effect of internal predetermined pressure, as will be evident hereinbelow. - At least one mechanical weakening zone, such as that illustrated by reference 31 and for example made by removing material, can be provided in this wall. The function of this sleeve especially is being able to break under the effect of predetermined pressure in its internal space. It advantageously has a sinuous path, such that once broken, the corresponding opening will be the widest possible.
- In the embodiment illustrated the
sleeve 30 is fixed to the conduit by the same means as those of thesleeves 2. This is an advantageous variant and it is clear that thesleeve 30 could have its own fixing means. - The material of this sleeve can be advantageously provided to have an elongation rate less than that of the
sleeves 2 - In reference to
FIG. 1 , this shows the presence, downstream of thesleeve 2 arranged to the right (that is, downstream of the conduit), of anannular throat 11 formed in the internal wall of theconduit 1 and which terminates inside the latter. - Its use and function will be referred to later in the description. It is evident that the downstream end of the
conduit 1 is open. In addition to theconduit 1, the fracturing equipment according to the invention comprises a tubular element 4 a possible embodiment of which is illustrated inFIG. 4 . - This is a tubular element of a diameter provided to allow it to be engaged in the
conduit 1 such that there is a free annular space between them. - Purely by way of indication, the diameter of this tubular element is less by approximately half that of the conduit.
- The wall of this tubular element 4 comprises at least one through-
hole 43. - In a particular embodiment these through-
holes 43 are arranged, in the longitudinal direction of the element substantially at mid-length, so as to be able to be placed opposite theopenings 3 of theconduit 1, as will be evident hereinbelow. - Also, the external wall is provided with
deformable rings 6 which are capable of being applied hermetically against the internal face of the conduit, as will be evident hereinbelow. These are for example deformable rings of known type, for example in the form of packers capable of being deployed on demand, to be placed against the internal wall of theconduit 10 while producing sealing at this level. They are positioned and fixed to the element 4 by any means known to the expert, for example inside a throat, between two pieces screwed together. - The deformable rings can be cup packers D, that is, lip joints activated by the liquid flow originating for example from the interior of the tool 4 via the
orifices 43, in the annular region where they extend. - A particular feature of this embodiment is the fact that there are only two
rings 6 whereof the mutual distance is close to the distance from theupstream end 20 of thefirst sleeve 2 to thedownstream end 20 of the second sleeve. - A blocking
system 44 is preferably provided at the downstream end of the tubular element 4. Here this is a system comprising aball valve 41, the operation of which will be explained later on in the description. - At this level, the external wall of the tubular element 4 is provided with immobilisation means 7 (illustrated schematically) of this element vis-à-vis the
conduit 1, thesemeans 7 being provided with at least oneelement 70 projecting peripherally intended to cooperate with theabove groove 11. These are for example ergots arranged radially relative to the element 4, which tend to be directed towards the exterior under the effect of a spring, not illustrated. - The embodiment in
FIGS. 8 to 11 is very similar to the preceding one. Unless expressed otherwise hereinbelow, the elements common to these two variants will not be described a second time. - The conduit of
FIG. 8 is identical in all aspects to that ofFIG. 1 , if only devoid ofsleeve 30. In these conditions theopening 3 is directly in contact with the exterior of theconduit 1. A particular feature of the element 4 ofFIG. 10 is that it comprises tworings 6 arranged on either side of each of theorifices 42, or four in total. - Substantially at mid-length of the tubular element (and therefore at mid-distance from the orifices 42), the embodiment of
FIG. 10 relates to anopening 43 which, as illustrated inFIGS. 10 and 11 , is blocked by a closingmember 5 directed axially. - The latter is capable of moving from a closing position to an opening position under the effect of a rise in pressure in the tubular element 4 without opposing the passage of fluid. In this case, in the example illustrated in
FIG. 10 , this relates to ahollow piston 50 retracted into a closing position by elastically deformable means such as ahelicoidal spring 51, supported against anannular stop 52 positioned inside the element 4. So, to the extent where the piston is hollow, the fluid which will be conveyed inside the tubular element could circulate from upstream to downstream, passing inside the hollow piston. - But under predetermined pressure conditions, via its front face the emptied cylindrical element forming the hollow piston will then accommodate pressure likely to shift it to an opening position, against the
spring 51. - The execution of a fracturing process which makes use of this embodiment of the equipment (and variants hereinbelow) will be described hereinbelow in the description.
- The embodiment illustrated in
FIGS. 14 and 15 is similar to the preceding one. - However, with respect to the
conduit 1 it is evident that this relates to not only a first throat orgroove 11, but also an identicalsecond groove 12 offset longitudinally (towards downstream) of the preceding one. - Also, the tubular element 4 illustrated in
FIG. 15 differs from the preceding one by the absence of the associated openingmember 43 and, of course, closingmember 5. - In the embodiment of
FIGS. 19 and 20 the tubular element 4 is unchanged relative to the variant ofFIG. 5 . - However, the two
annular grooves conduit 1 which has just been described are replaced by a wideannular region 13 forming a reduction in thickness of the wall of theelement 1. Its opposite ends 130 and 131 act as stops, as will be evident hereinbelow. - In the variant embodiment of
FIGS. 21 and 22 theconduit 1 comprises a singleannular throat 11, as in the embodiment ofFIGS. 1 and 8 . - As for the tubular element 4, it is still devoid of an “intermediate”
opening 43 and themeans 7 equipping it at its downstream end are likely to shift between two annular stops longitudinally distant from each other. They are referenced 8 inFIG. 21 .FIGS. 23 and 24 relate to equipment similar to that ofFIG. 5 . However, as will be evident hereinbelow, their mode of use changes. - The same applies for the equipment evident in
FIGS. 25 and 26 . - We will now describe the execution of a fracturing process which makes use of the above described material.
- This process requires the presence of a
conduit 1 such as described hereinabove. - In a first step this process consists of injecting fracturing fluid F under predetermined pressure P1 into the
conduit 1, this fluid being funnelled into thefirst openings 10 only communicating with thesleeves 2. This pressure is selected such that it is sufficient to cause expansion of thesleeves 2 in the direction of the wall of the well A, so that it is applied hermetically against this wall. - This is for example the state corresponding to
FIG. 6 . - In the process, the pressure P1 prevails inside the
sleeves 2 whereas in the space which separates the two sleeves of a same pair delimited by theconduit 1 and the wall of the well, only original pressure PO prevails. - In a second step, fluid is injected under fracturing pressure P2 different to the first pressure P1 inside the conduit. This fluid is funnelled into the
first openings 10 andsecond openings 3 such that the same pressure P2 prevails on either side of the wall of thesleeves 2. - This corresponds to the situation for example of
FIG. 7 . Because there is no differential pressure between the interior of thesleeves 2 and the annular zone opposite the wall to be fractured, the fracturing is veritably localised at the level of this annular wall and presents no risk of propagation opposite the abovementioned sleeves. - This is the principle of execution of said process.
- It is however useful to cover it in greater detail, given the different variant embodiments of the equipment which have been described hereinabove.
- Therefore, in reference to
FIGS. 1 , 4 and 5, while thesleeve 1 has been placed in the well, the tubular element 4 is positioned with its downstream end open, that is, without the latter being blocked, to allow free circulation of liquid present in the well. - Once this placement is complete (whereof proper execution can be verified by means of adapted control apparatus), liquid containing a ball which, once in place blocks the
valve 41 of the blocking means 44, is sent under first reference pressure. - The immobilisation of the tubular element 4 relative to the
conduit 1 is ensured by themeans 70 with projecting element(s) which have the capacity to be retracted to slide along the internal wall of theconduit 1 and be engaged and immobilised inside theannular groove 11 of theconduit 1. - This gives the position of
FIG. 5 in which thesecond openings 10 of the conduit are opposite theopenings 43 of the tubular element, whereas the tworings 6 are respectively opposite the upstream and downstream ends 20 of the twosleeves 2. - As indicated hereinabove, and whereas the
rings 6 have been deformed so as to seal theconduit 1, fluid under first reference pressure P1 is sent inside the element 4. - This liquid circulates through the
openings metallic sleeves 2 such that their wall is applied against that of the well A to form a tight joint. - However, when fluid F is sent under second pressure P2, the wall of the
sleeves 30 bursts, even before it makes contact with the wall of the well A. - In the process, fracturing pressure P2 balances out on either side of the deformed wall of the
sleeves 2, which implements fracturing in a particularly targeted tight manner without risk of transmission of the fracturing to a zone which would not be opposite that intended. - The execution of the variant of
FIGS. 8 and 10 is relatively similar to what has just been described. - The element 4 is immobilised while the
first openings 10 of theconduit 1 are opposite theopenings 42 of the tubular element, whereas thesecond openings 3 of theconduit 1 are opposite theopening 43 of the element 4. - When fluid under pressure P1 is sent in the element 4, due to the fact that the closing
member 5 is a hollow piston the liquid circulates through this piston and enables the secondmetallic sleeve 2 to be placed under the same pressure P1. - In any case, this first pressure P1 is insufficient to move the hollow piston of the
member 5, such that theopenings 43 are blocked. - The following step which is illustrated in
FIG. 13 is conducted this time under pressure P2 which is greater than pressure P1 and which is capable of moving thehollow piston 5 to make theopenings 43 accessible. The liquid is funnelled there, as well as through theorifices - As in the present case, the fracturing pressure P2 balances out on either side of the deformed wall of the
sleeves 2, which implements fracturing in a particularly targeted tight manner without risk of transmission of the fracturing to a zone which would not be as opposite that intended. - In the embodiment of
FIGS. 16 to 18 , it should be recalled that the tubular element 4 is devoid ofopenings 43. - Also, for carrying out the fracturing process, this tubular element 4 is positioned so that the mutual immobilisation means 7 are wedged opposite the first
peripheral groove 11. - This is a first immobilisation position in which the
rings 6 of the element 4 are substantially opposite theends 20 of each of thesleeves 2, such that when fluid F is sent under the first pressure P1 only thesleeves 2 are accessible and deform to ensure sealing vis-à-vis the wall of the well A. - In a subsequent step, and before pressure P2 is sent to the tubular element 4, it is shifted so that the immobilisation means 7 cooperate this time with the second
annular groove 12 which is offset longitudinally from thefirst groove 11. - In this position, and as illustrated in
FIG. 18 , therings 6 of the element 4 are then positioned such that they allow communication of the interior of this element with theopenings conduit 1. - In these conditions and as in the preceding embodiment, the pressure P2 can circulate through the abovementioned openings so as to cause fracturing under pressure P2 which is balanced on either side of the wall of the
sleeves 2. - The embodiment of
FIGS. 19 and 20 is relatively similar to the preceding one, if only shifting of the element 4 from the first to the second longitudinal position is no longer done by means of the twoannular grooves minimal thickness 13 whereof the ends 130 and 131 constitute stops for themeans 7. - The fracturing can be carried out in the same way as in the preceding embodiment.
- As mentioned hereinabove and in reference to
FIG. 23 , this relates to a conduit similar to that illustrated inFIG. 5 . - In this embodiment however, the
sleeve 30 has the particular feature of being provided to break under pressure greater than the expansion pressure P1 of thesleeves 2. However, it can be less than the fracturing pressure P2. - In the step presented in
FIG. 23 and prior to placing of the element 4, the interior of theconduit 1 is subjected to said pressure P1 such that the fluid is funnelled into theopenings 10. This deforms and thrusts thesleeves 2 against the wall A without affecting the handling of thesleeve 30. - Once the pressure P1 stops, the element 4 is placed such that the
rings 6 are now opposite the upstream ends of thesleeve 2 located to the left of Figure, and downstream of thesleeve 2 located to the right of the figure. - The interior of the element 4 is then subjected to pressure P2 (greater than P1) capable not only of causing “the explosion” of the
sleeve 30 but also the fracturing of the rock. This is the situation illustrated inFIG. 24 . - The embodiment of
FIGS. 25 and 26 contains beforehand a step identical to that ofFIG. 23 . - This gives however a situation in which pressure P3 necessary for breaking/exploding the
conduit 3 is greater not only than deformation pressure P1 of thesleeves 2 but also than fracturing pressure P2. - Under pressure P1, this prior step therefore deforms the
sleeves 2 without affecting thesleeve 3. - After relaxing of the pressure and placing of the element 4 in the same position as that of
FIG. 24 , pressure P3 which is sufficient for causing exploding of thesleeve 3 is generated inside the element 4. This is the situation inFIG. 25 . This pressure is lowered instantly after. - The element 4 is then slid from upstream to downstream, such that neither of the
rings 6 is situated opposite thesleeves 2. - Fluid is injected under fracturing pressure P2 into the element 4 so as to fracture the rock. Simultaneously, the same pressure is sent to the annular space which separates the
conduit 1 from the element 4 to create pressure equilibrium on either side, capable of avoiding any collapse phenomenon of the wall 4. - It is evident that the
ring 6 located downstream of theopenings 42 of the element 4 is “activated” so as to create sealing between the upstream and the downstream of the conduit. This is however not necessary for the ring located upstream. - The illustration of
FIG. 27 shows the importance of having exploding pressure P3 (rupture) of thesleeve 3, which is greater than fracturing pressure. In fact, due to the fact that the process moves from downstream to upstream along the completion (from right to left of FIG. 27), it is necessary, when it is proposed to fracture the rock at the level A1 n+1/A2 n+1 for the fracturing pressure P2, not to cause rupture of thesleeve 3 located downstream, at the level A1 n/A2 n (located on the left of Figure). This is definitely the case here, since the pressure P2 is not sufficient to make this happen.
Claims (15)
1. Hydraulic fracturing equipment of the rock of a well, wherein it comprises, on the one hand:
a conduit provided along its external face with at least one pair of expandable metallic tubular sleeves fixedly, connected to the conduit, this conduit having opposite each sleeve at least one opening known as “first opening” to put the internal space of the conduit in communication with the space delimited by the latter and each sleeve, and opposite the space separating the two sleeves of a same pair at least one other opening, known as “second opening” for putting the internal space of the conduit in communication with the interior of the well;
a tubular element of diameter provided to allow it to be engaged in said conduit, such that there is a free annular space between them;
the wall of this tubular element (4) comprising at least one first through-hole (42);
the wall being also provided externally with at least two deformable rings located on either side of said first orifice, capable of being applied hermetically against the internal face of said conduit (1).
2. The equipment as claimed in claim 1 wherein the distance between the deformable rings is greater than the distance separating said first openings of said conduit.
3. The equipment as claimed in claim 1 , wherein it comprises at least two first through-holes which are arranged in the longitudinal direction of the element according to two zones whereof the mutual distance is substantially equal to that of the first openings of said conduit.
4. The equipment as claimed in claim 1 , wherein the means which prevent said fluid which is funnelled into said second opening from terminating in the space separating the two sleeves consist of a sleeve with sealed ends, fixed on the external wall of said conduit, sleeve which is capable of breaking under predetermined pressure known as “breaking pressure”.
5. The equipment as claimed in claim 1 , wherein said tubular element comprises at least one second orifice and two pairs of rings, the second orifice being located between the rings opposite the two pairs of rings.
6. The equipment as claimed in claim 5 , wherein two rings are arranged on either side of said first orifices.
7. The equipment as claimed in claim 6 , wherein the rings of a same pair are separated longitudinally by a distance greater than that which separates the first and the second openings of said conduit
8. The equipment as claimed in claim 1 , wherein said tubular element comprises means capable of blocking its downstream end on request.
9. The equipment as claimed in claim, 8, wherein said means comprise a valve.
10. The equipment as claimed in claim 1 , wherein said conduit and said tubular element have mutual immobilisation means.
11. The equipment as claimed in claim 8 said valve is coupled with said mutual immobilisation means such that said valve blocks said end only when said immobilisation means cooperate.
12. The equipment as claimed in claim 1 , wherein said second orifice is provided with a closing member directed axially, which moves from a closing position to an opening position under the effect of a rise in pressure without opposing the longitudinal passage of fluid.
13. The equipment as claimed in claim 12 , wherein said member comprises a hollow piston retracted into a closing position by elastically deformable means such as a spring.
14. The equipment as claimed in claim 1 , wherein said conduit and said tubular element have mutual immobilisation means in two distinct positions offset longitudinally.
15. The equipment as claimed in claim 10 , wherein said means are arranged so as to allow passage from one to the other of the distinct positions by sliding of said tubular element relative to said conduit (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/432,658 US20150252659A1 (en) | 2012-10-03 | 2013-09-24 | Hydraulic fracturing process and corresponding equipment |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1259384A FR2996247B1 (en) | 2012-10-03 | 2012-10-03 | HYDRAULIC FRACTURING METHOD AND CORRESPONDING EQUIPMENT |
FR1259384 | 2012-10-03 | ||
US201261710299P | 2012-10-05 | 2012-10-05 | |
US14/432,658 US20150252659A1 (en) | 2012-10-03 | 2013-09-24 | Hydraulic fracturing process and corresponding equipment |
PCT/EP2013/069819 WO2014053358A2 (en) | 2012-10-03 | 2013-09-24 | Hydraulic fracturing process and corresponding equipment |
Publications (1)
Publication Number | Publication Date |
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US20150252659A1 true US20150252659A1 (en) | 2015-09-10 |
Family
ID=47594923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/432,658 Abandoned US20150252659A1 (en) | 2012-10-03 | 2013-09-24 | Hydraulic fracturing process and corresponding equipment |
Country Status (3)
Country | Link |
---|---|
US (1) | US20150252659A1 (en) |
FR (1) | FR2996247B1 (en) |
WO (1) | WO2014053358A2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3299575A3 (en) * | 2018-01-31 | 2018-09-05 | Welltec A/S | Downhole completion system and method |
US10502033B2 (en) | 2014-11-20 | 2019-12-10 | Slatel Industries | Hydraulic stimulation method and corresponding hydraulic stimulation device |
US10837255B2 (en) * | 2018-04-11 | 2020-11-17 | Welltec Oilfield Solutions Ag | Downhole straddle system |
FR3102505A1 (en) * | 2019-10-24 | 2021-04-30 | Burgeap | Device for taking liquid from a piezometer |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO3044084T3 (en) | 2013-12-04 | 2018-04-14 | ||
CN105064973A (en) * | 2015-08-28 | 2015-11-18 | 中国石油化工股份有限公司 | Blasting type fracturing control valve |
RU172422U1 (en) * | 2017-04-27 | 2017-07-07 | Общество с ограниченной ответственностью "Гидроразрыв Кузнецк", ООО "Гидроразрыв Кузнецк" | CUP HYDRAULIC PACKER |
CN114018719B (en) * | 2021-11-04 | 2024-01-26 | 中国矿业大学 | Supercritical carbon dioxide fracturing temperature and pressure accurate monitoring test device and method |
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US20070295508A1 (en) * | 2006-06-23 | 2007-12-27 | Frac Source Inc. | Shock-release fluid fracturing method and apparatus |
US20110266004A1 (en) * | 2009-01-12 | 2011-11-03 | Hallundbaek Joergen | Annular barrier and annular barrier system |
US20120125619A1 (en) * | 2009-05-27 | 2012-05-24 | Peter Wood | Active external casing packer (ecp) for frac operations in oil and gas wells |
US20130098621A1 (en) * | 2010-06-30 | 2013-04-25 | Jørgen Hallundbæk | Fracturing system |
US20130180736A1 (en) * | 2010-09-30 | 2013-07-18 | Welltec A/S | Drill pipe |
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GB0417328D0 (en) * | 2004-08-04 | 2004-09-08 | Read Well Services Ltd | Apparatus and method |
FR2901837B1 (en) * | 2006-06-06 | 2015-05-15 | Saltel Ind | METHOD AND DEVICE FOR SHAPING A WELL BY HYDROFORMING A METAL TUBULAR SHIRT, AND SHIRT FOR SUCH USAGE |
DK2466065T3 (en) * | 2010-12-17 | 2013-05-27 | Welltec As | Well Completion |
AU2012220623B2 (en) * | 2011-02-22 | 2016-03-03 | Weatherford Technology Holdings, Llc | Subsea conductor anchor |
-
2012
- 2012-10-03 FR FR1259384A patent/FR2996247B1/en active Active
-
2013
- 2013-09-24 US US14/432,658 patent/US20150252659A1/en not_active Abandoned
- 2013-09-24 WO PCT/EP2013/069819 patent/WO2014053358A2/en active Application Filing
Patent Citations (5)
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US20070295508A1 (en) * | 2006-06-23 | 2007-12-27 | Frac Source Inc. | Shock-release fluid fracturing method and apparatus |
US20110266004A1 (en) * | 2009-01-12 | 2011-11-03 | Hallundbaek Joergen | Annular barrier and annular barrier system |
US20120125619A1 (en) * | 2009-05-27 | 2012-05-24 | Peter Wood | Active external casing packer (ecp) for frac operations in oil and gas wells |
US20130098621A1 (en) * | 2010-06-30 | 2013-04-25 | Jørgen Hallundbæk | Fracturing system |
US20130180736A1 (en) * | 2010-09-30 | 2013-07-18 | Welltec A/S | Drill pipe |
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US10502033B2 (en) | 2014-11-20 | 2019-12-10 | Slatel Industries | Hydraulic stimulation method and corresponding hydraulic stimulation device |
EP3299575A3 (en) * | 2018-01-31 | 2018-09-05 | Welltec A/S | Downhole completion system and method |
US10837255B2 (en) * | 2018-04-11 | 2020-11-17 | Welltec Oilfield Solutions Ag | Downhole straddle system |
FR3102505A1 (en) * | 2019-10-24 | 2021-04-30 | Burgeap | Device for taking liquid from a piezometer |
Also Published As
Publication number | Publication date |
---|---|
FR2996247A1 (en) | 2014-04-04 |
WO2014053358A3 (en) | 2014-08-07 |
WO2014053358A2 (en) | 2014-04-10 |
FR2996247B1 (en) | 2015-03-13 |
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