MX2014006489A

MX2014006489A - Grout delivery.

Info

Publication number: MX2014006489A
Application number: MX2014006489A
Authority: MX
Inventors: Charlie Oliver; Andreas Stergiou; Jean Pierre De Ru
Original assignee: Imdex Ltd
Priority date: 2011-11-30
Filing date: 2012-11-30
Publication date: 2014-11-26
Also published as: WO2013078514A1; RU2014121047A; PE20142057A1; CA2856437A1; AU2012318278B2; CO7030944A2; AU2012318278A1; CL2014001435A1; US20150226029A1; ZA201403644B; BR112014013281A2

Abstract

A grout delivery system (10) for delivery of grout to a downhole location within a borehole. The grout comprising a settable mixture of first and second flowable components. The grout delivery system (10) is adapted to be conveyed to the location within the borehole to which grout is to be delivered and to be subsequently retrieved. The delivery system (10) comprises a delivery head (39), a first reservoir (43) for receiving a charge of the first component, and a second reservoir (45) for receiving a charge of the second component. The delivery system (10) is operable to cause supplies of the first and second components to be conveyed to a mixing zone (127) at the delivery head (39) where they are mixed to form the grout and delivered into the borehole.

Description

SUPPLY OF MORTAR TECHNICAL FIELD This invention relates to a system and method for the delivery of a fluldizable substance as a mixture comprising a first and a second component.

The invention has been devised particularly, though not necessarily exclusively, for the supply of mortar in a hole.

ANTECEDENTS OF THE TECHNIQUE The following discussion of the background of the technique is only intended to facilitate the understanding of the present invention. The discussion is not an acknowledgment or admission that any of the materials referenced is or has been part of the common general knowledge on the priority date of the request.

Diamond drilling for exploration is used in the mining industry to perform drilling for geological inspection. Specifically, the drilling process provides core samples for geological analysis.

Typically, drilling with core extraction is carried out with a drill for core extraction comprising external and internal tube assemblies. The internal tube assembly comprises an internal tube for control. A cutting head is fixed to the outer tube assembly so that the rotational torque applied to the outer tube assembly is transmitted to the cutting head. A core is generated during the drilling operation, where the core progressively extends along the internal core tube as the core progresses. drilling. When a core sample is required, the core inside the core tube is fractured. The internal tube assembly and the fractured core sample contained therein are then recovered from the interior of the drilling hole, usually by means of a recovery cable (which is commonly referred to as wire line) lowered by the drill hole. Once the internal tube assembly has been brought to the surface of the soil, the core sample can be removed from the inner core tube and can be subjected to the necessary analysis.

In drilling operations, drilling fluid (commonly referred to as drilling mud) is used to clean and cool a drill bit during the drilling process and to transport drill cuttings to the soil surface.

In certain circumstances, an underground area through which a drilling is being performed may be unstable or otherwise vulnerable to the development of fracture through which the fluid may escape. The loss of drilling fluid is undesirable, both in economic terms and can also lead to a reduction in fluid pressure within the borehole. In order to avoid or at least inhibit the loss of drilling fluid, it is known to provide mortar to the vulnerable location within the borehole in order to seal the fractures through which it may otherwise escape. The present invention seeks to provide a system and method for supplying mortar to a location within a borehole. However, the invention need not be limited to said application and can be applied to the supply of fluidizable substances in remote locations.

COMPENDIUM OF THE INVENTION According to a first aspect of the invention, there is provided a supply system for the supply of a fluidizable substance as a mixture comprising a first and second component in a location to which the supply system is transported, where the system of supply comprises a supply head, a first reservoir for receiving a charge of the first component, a second reservoir for receiving a charge of the second component and an operable actuating means for causing supplies of the first and second component to be transported to the supply head in which they are mixed and supplied in the location.

With this arrangement, the fluidizable substance comprises a fluid mixture of the first and second component. The mixture is fluid in the sense that it can flow to be delivered to the intended location. Usually, the fluidizable substance is intended to harden or set once it is in the place of supply.

Preferably, the first and second reservoirs are configured as variable volume chambers whereby the volume contraction of the chambers causes the first and second component to be expelled from them and transported to the supply head.

Preferably, each variable volume chamber is defined by a piston and cylinder arrangement, where the piston can be selectively moved within the cylinder to produce the volume variation of the chamber.

Preferably, the actuating means responds to the fluid pressure to cause the volume contraction of the chambers.

Preferably, the actuating means includes the pistons, where the arrangement consists of the pistons responding to the fluid pressure exerted on the sides thereof opposite the chambers moving within the respective cylinders and thus causing volume contraction of the pistons. cameras. Preferably, the delivery system further comprises a control valve means for controlling the supply of fluid pressure to the pistons to cause the movement of the same along the cylinders, the control valve means being configured to allow the Admission of fluid under pressure in response to a supply of fluid pressure that exceeds a prescribed level. Usually, the fluid pressure supply comprises the fluid supplied in a drill string in the borehole, where the configuration consists in that the delivery system is configured to be accommodated within the drill string exposed to the fluid inside the drill string. drilling.

Preferably, the supply system comprises an additional control valve means to prevent the ingress of fluid from the bore in the reservoirs through the supply head.

Preferably, the additional control valve means is disposed between the supply head and the reservoirs and is configured to allow fluid to flow between the reservoirs and the supply head with the fluid pressure in the reservoirs exceeding a prescribed level.

Preferably, the supply head defines a mixing zone in which the first and second component are joined together to mix them into a fluid mixture. The mixing zone may comprise a mixing chamber.

Preferably, the supply head comprises a body and the mixing zone is defined within the confines of the body.

Preferably, the mixing zone is surrounded by a first and second face arranged in an angular relationship opposite each other and diverging outwards towards an exit opening.

Preferably, the outlet opening is provided at the periphery of the body. Preferably, the body includes a first flow path and a second flow path, where the first flow path is for communication with the first reservoir and opening on the first face and where the second flow path is for communication with the second reservoir and opening on the second side.

The invention according to the first aspect of the invention is particularly suitable for the supply of a fluidizable substance in the form of a mortar in a perforation during the drilling process to seal any fracture through which the drilling fluid can escape from the drilling. Typically, when the soil is found to be unstable or other soil that could be vulnerable to filtration of drilling fluid, the drilling process is temporarily suspended and the delivery system according to the invention is introduced into the borehole to supply the drilling fluid. Mortar to seal the area of unstable soil. Prior to the introduction of the supply system, the drill head is partially retracted to expose the vulnerable area of the soil to which the liquid concrete is to be supplied. After the mortar has been delivered and set, the drilling process starts again and the section of the ground where it was filled with mortar is drilled.

With such an arrangement, the supply system can be transported to the location within the borehole in which the mortar is to be supplied in any suitable manner. A particularly convenient arrangement for transporting the supply system to the supply location within the borehole and further, subsequently recovering the supply system, is by means of a wire line system of the type that is well known in drilling practice.

The mortar constitutes a fragile mixture of the first and second fluidizable components that are attached at the time of supply. Accordingly, it is possible to employ mortars that could not otherwise be used to seal a hole (particularly, a hole containing water) including a latex mortar or urethane mortar. The arrangement is particularly suitable for mortars that are activated when the components thereof are mixed together.

The invention according to the first aspect of the invention is particularly suitable for the supply of water-activated mortar, since the mortar can be isolated from the water within the perforation until the moment it is supplied, after which it can be activated with the contact with water.

Typically, the first and second component of the fluidizable mixture comprise different material that are mixed together and interact to provide the fluidizable mixture. However, in certain applications, the first and second components of the fluidizable mixture may comprise the same material, in which case the first and second reservoirs each contain the same type of material.

According to a second aspect of the invention, there is provided a mortar supply system for the supply of a mortar comprising a settable mixture of the first and second fluidizable component in a perforation, where the supply system comprises a supply head, a first reservoir for receiving a charge of the first component, a second reservoir for receiving a charge of the second component and an operable driving means for causing the supplies of the first and second component to be transported to the supply head in which they are mixed and delivered in the drilling.

The mortar supply system according to the second aspect of the invention may have any one or more of the aforementioned characteristics of the delivery system according to the first embodiment. . According to a third aspect of the invention, there is provided a method of supplying a fluidizable substance as a fluidizable mixture comprising a first and second component, wherein the method comprises the use of a delivery system according to the first aspect of the invention. According to a fourth aspect of the invention, a mortar supply method is provided as a settable fluidizable mixture comprising a first and second component in a perforation, wherein the method comprises the use of a mortar supply system in accordance with the second aspect of the invention.

According to a fifth aspect of the invention, there is provided a method of delivering a fluidizable substance as a fluidizable mixture comprising a first and second component from a first location to a second location spaced from the first location, where the method comprises transporting a charge of the first component and a charge of the second component separated from each other from the first location to the second location, mixing the first and second component to form the fluidizable mixture and discharging the fluidizable mixture in the second location.

According to a sixth aspect of the invention, there is provided a method of delivering mortar as a flowable fluidizable mixture comprising a first and second component in a bore, wherein the method comprises transporting a load of the first component and a load of the second component. separated from each other in the perforation, mixing the first and second component to form the fluidizable mixture and discharging the fluidizable mixture in the perforation.

BRIEF DESCRIPTION OF THE DRAWINGS Additional features of the present invention are described in greater detail in the following description of a non-limiting mode thereof. This description is included solely for purposes of exemplifying the present invention. It should not be understood as a restriction in the general summary, disclosure or description of the invention as set forth above. The description will be made with reference to the attached drawings where: Figure 1 is a schematic perspective view of one embodiment of a mortar supply system according to the invention, wherein the mortar supply system comprises an elongated assembly shown in an expanded condition.

Figure 2 is a side view of the arrangement shown in Figure 1; Figure 3 is a schematic side view, on an enlarged scale, of a piston and cylinder arrangement that provides deposits within the elongated assembly; Figure 4 is a fragmentary schematic perspective view of an upper section of the mortar supply system in an expanded condition; Figure 5 is a side view of the arrangement shown in Figure 4; Figure 6 is a side view of the upper section of the mortar supply system in an assembly condition; Figure 7 is a fragmentary schematic view illustrating a fluid flow path within the upper section of the mortar supply system; Figure 8 is a fragmentary schematic perspective view of a lower section of the mortar supply system in an expanded condition; Figure 9 is a side view of the arrangement shown in Figure 8; Figure 10 is a fragmentary schematic perspective view of the lower section of the mortar supply system in a mounting condition; Figure 11 is a fragmentary schematic sectional view of the lower section of the mortar supply system, illustrating in particular a one-way flow control valve arrangement in a closed condition; Figure 12 is a view similar to Figure 11 except that the one-way flow control valve arrangement is in an open condition in response to flow; and Figure 13 is a view similar to Figure 12 illustrating flow paths of the mortar components within the upper section of the mortar supply system.

The figures represent one embodiment of the invention. The modality illustrates certain configurations; however, it will be appreciated that the invention may take the form of many configurations, as would be obvious to a person skilled in the art, while still embodied in the present invention. These configurations will be considered within the scope of this invention.

DESCRIPTION OF THE MODALITIES With reference to the drawings, one embodiment of a mortar supply system 10 according to the invention for use in a core extraction drilling operation in a drill inspection operation is shown. The drill operation with core extraction is performed with a core extraction drill (not shown) adapted as a bottom end assembly to a series of drill rods which together constitute a drill string. The drill for core extraction comprises an internal tube assembly, which includes a witness tube, for the recovery of the core. The drill for core extraction comprises an external tube assembly.

The internal tube assembly further comprises a rear end assembly that is configured to engage with the fishing plug assembly (overshot) attached to a wire line system, as is widely known in core drilling practices. With this arrangement, the internal tube assembly can be lowered into and retrieved from the external tube assembly and the drill string where the external tube assembly is incorporated. If during the drilling operation it is found that an underground area is unstable or otherwise vulnerable to the development of fractures through which the drilling fluid may escape, there may be a need to stabilize the area with mortar in order to seal fractures against leakage of drilling fluid. The mortar supply system 10 is provided for said purpose. The mortar supply system 10 is adapted to be transported to the location within the borehole to which the mortar is to be delivered and to be subsequently recovered, by deploying the assembly of fishing plug (overshot) fixed to the wire line system as used with the internal tube assembly.

In this embodiment, the mortar supply system 10 is adapted to supply the mortar as a fluidizable substance which can set after being supplied. The fluidizable substance comprising a mixture of two mortar components that react chemically when mixed together to facilitate mortar setting. The two components of the mortar are mixed together at the supply location within the perforation and are then supplied as a highly viscous fluid mixture.

The mortar supply system 10 comprises an elongated assembly 20 having a lower end 21 and an upper end 23. The elongated assembly 20 is configured to be deployed as a unit within the drill string, with the upper end 23 being it adapts to engage with the fishing plug assembly (overshot) (so shown) so that the assembly 20 can be lowered by the drill string and hoisted by the drill string using the wire line system.

The elongated assembly 20 comprises an elongated body 31 having opposite ends 33, 35. A rear end assembly 37 is connected to one end 33 of the elongated body 31. A supply head assembly 39 is connected to one end 35 of the elongate body 31 The rear end assembly 37 defines the upper end 23 of the elongated assembly 20 and the mounting of the supply head 39 defines the lower end 21 of the elongated assembly 20.

The elongate body 31 comprises two tanks 43, 45 for receiving the respective loads of the two mortar components. With more particularity, the body elongate 31 comprises a section of the upper end 47, a section of the lower end 48 and two ducts 49 which are arranged in a side-to-side relationship and which extend between the end sections 47, 48. Each of the end sections 47, 48 define an end face 50 in which the ducts 49 are opened.

The reservoirs 43, 45 are defined within the ducts 49, as will be described in greater detail below. In this form, the loads of the two components of the mortar are isolated from each other while in the tanks. In the distribution shown, the two ducts 49 are defined by ducts 51 which cooperate to provide an integrated body structure 52 in conjunction with the upper and lower end sections 47, 48.

The upper end section 47 of the elongate body 31 is configured for connection to the rear end assembly 37 and the lower end section 48 is configured for connection to the supply head assembly 39, as will be explained in more detail below. More particularly, the upper end section 47 comprises a threaded coupling configured as a threaded male coupling section 53 and a lower end section 48 further comprises a threaded coupling configured as a male threaded coupling section 55. The two end sections 47, 48, including the threaded male coupling sections 53, 55 are in fact of similar configuration and in this way the elongate body 31 can be used in any of the orientations.

A piston 61 is slidably and sealingly received in each duct 49; that is, each duct 49 constitutes a cylinder 63 where the respective piston 61 is housed for a forward and backward movement within it.

Each piston 61 and cylinder 63 cooperate to define two opposed chambers 65, 67 that vary in volume with the movement of the piston within the cylinder. The chamber 5 will be referred to hereinafter as the lower chamber and the chamber 67 will be referred to hereinafter as the upper chamber. In Figure 2, the pistons 61 are shown on the upper ends of the cylinders 63 and in Figure 3, the pistons 61 are further represented along the cylinders so as to form the lower chambers 65 and upper chambers 67 in the opposite sides of the pistons.

With this arrangement, the lower chambers 65 have exit ends 66 that open on the end face 50 of the lower end section 48 and the upper chambers 67 have inlet ends 68 that open on the end face 50 of the upper end section 47.

The two lower chambers 65 communicate with the mounting of the supply head 39 and define the respective reservoirs 43, 45 to receive the loads of the two components of the mortar. The exit ends 66 of the lower chambers 65 define cavities 69, the purpose of which will be explained later. With this arrangement, the cavities 69 are disposed at the outlet ends of the reservoirs 43, 45.

The two upper chambers 67 communicate with the rear end assembly 37. As will be explained in more detail below, the rear end assembly 37 is adapted to selectively accept fluid under pressure in the two upper chambers 67 to exert the pressure of fluid in the pistons 61 and thus driving the pistons along their respective cylinders 63, causing volume contraction of the two lower chambers 65. The volume contraction of each lower chamber 65 serves to expel at least part of the load of the mortar component contained within the respective deposit 43, 45.

The rear end assembly 37 comprises a body 71 having an upper end 73 and a lower end 75. The body 71 is of modular construction comprising a series of sections of the body 72 connected together, including a first intermediate section of the body 72a having a side wall 76 and a second intermediate section of the body 72b.

The upper end 73 of the rear end assembly 37 is adapted to engage with the overshot fitting (not shown), as mentioned above, so that the elongated assembly 20 can be lowered by the drill string. Hoisted by the drill string using the wire line system. In the illustrated arrangement, the rear end assembly 37 includes a stabilizer 76 and a spear tip 77 configured to engage with the fishing plug assembly (overshot). The fishing plug assembly (overshot) includes a retractor mechanism with latch head that can be releasably attached to the spear tip 77.

The lower end 75 of the rear end assembly 37 is adapted to be coupled to the upper end section 47 of the elongated body 31. In the illustrated arrangement, the lower end 75 of the rear end assembly 37 comprises a threaded coupling configured as a cross section. threaded female coupling 78 adapted to threadably engage the male coupling section 53 in the upper end section 47 of the elongate body 31. The female coupling section 78 includes a coupling pocket 79 for receiving the upper end section 47 of the elongated body 31.

As mentioned, the rear end assembly 37 is adapted to selectively accept fluid under pressure in the two upper chambers 67 to exert fluid pressure on the pistons 61 and thus drive the pistons along their respective cylinders 63. For To this end, the body 71 of the rear end assembly 37 includes a fluid flow path 81 extending between the exterior of the rear end assembly 37 and the coupling cavity 79. The fluid flow path 81 is represented by lines of flow identified by the reference number 82 in Figure 7.

The fluid flow path 81 comprises a section of the inlet end 83 comprising inlet ports 84 incorporated in the side wall 76 of the intermediate section of the body 72a. The fluid flow path 81 further comprises a section of the outlet end 85 comprising an outlet port 86 that opens into the coupling cavity 79. The fluid flow path 81 further comprises an intermediate section 87 incorporating a valve of flow control 89 that can be operated to allow fluid flow along the fluid flow path 81. In the arrangement shown, the flow control valve 89 is housed in the second intermediate section 72b. The flow control valve 89 comprises a valve seat 91 and a valve member 92 that can move in and out of the sealing engagement with the valve seat in response to fluid pressure. The flow control valve 89 is closed against fluid flow when the valve member 92 is in sealing engagement with the valve seat 91 and opens to allow fluid flow when the valve member 92 is outside the sealing hitch. with the valve seat. The valve member 92 comprises a valve body 93 that receives in a guided and supported manner within the body section 72b for a reciprocal movement in and out of the sealing engagement with the valve seat 91. The valve member 92 is biased to the sealing engagement with the valve seat 91 by a valve spring 94 and has a valve face 95 which is exposed to the fluid pressure, whereby the valve member is caused to move out of the sealing engagement with the valve seat 91 when the fluid pressure rises to a level which can overcome the deviating influence of the valve spring 94. The valve body 93 incorporates deflection ports 96 through which fluid can flow to pass around and through the valve body and advance toward outlet port 86 when the flow control valve 89 is opened.

With this arrangement, the flow control valve 89 is configured to allow fluid to flow along the fluid flow path 81 in the coupling cavity 79, and thus, the admission of the fluid under pressure in the two upper chambers 67 which are in communication with the coupling cavity 79, in response to a supply of fluid pressure exceeding a prescribed level. In this embodiment, the flow control valve 89 responds to a fluid supply pressure exceeding 100 psi; that is, the valve is made to open to allow fluid to flow along the fluid flow path 81 when the fluid pressure at the inlet side of the valve exceeds 100psi. Of course, it will be understood that the prescribed pressure can be selected at any appropriate level and does not need to be limited to 100 psi.

In this embodiment, the source that is used to supply fluid pressure to drive the mortar supply system 10 comprises water that is pumped into the drill string. With this arrangement, the water under pressure flows in the assembly of the rear end 37 and on the input side of the path of flow 81. If the water pressure exceeds the prescribed level (which in this mode is 100psi), the control valve means in response to the pressure is made to open and thus allow the water to flow along the path of fluid 81 and in the two upper chambers 67. The resulting water pressure exerted on the pistons 61 moves the pistons along their respective cylinders 63, causing volume contraction of the two lower chambers 65.

The mounting of the supply head 39 comprises a valve assembly 101 and a supply nozzle 103.

The valve assembly 101 is adapted to prevent water ingress from the borehole in the two reservoirs 43, 45. By way of explanation, it often happens that a perforation that is drilled contains water through which the supply system of mortar 10 needs to descend as it moves to the location where the mortar needs to be supplied. In certain circumstances, it is important that there is no water entering the two tanks 43, 45 while the mortar supply system 10 is immersed in the water. It may be particularly important that there is no water ingress in circumstances where the tanks 43, 45 contain mortar material activated with water.

In the absence of the valve assembly 101, the mortar supply system 10 could possibly be vulnerable to the ingress of water into the tanks 43, 45, particularly during the descent into water within the borehole due to the forces likely to be exerted during the descent.

The valve assembly 101 comprises a valve body 105 incorporating two flow passages 107, each adapted to communicate with one of the respective reservoirs 43, 45. More particularly, the flow passages 107 have inlet ends 109 configured as asparagus 111 adapted to be received in a sealing manner in the corresponding basin 69 at the outlet ends of the tanks 43, 45. In addition, the flow passages 107 have outlet ends 113 configured as basins 115 for connection to the supply nozzle 103, as will explain later.

The valve body 105 houses another control valve means 116 comprising two one-way spring loaded disc valves 117, each associated with one of the flow passages 107.

The two spring-loaded disc valves 117 are effectively one-way valves that allow the mortar material to be dispensed from the reservoirs 43, 45 in the manner previously described but inhibiting the flow of water in the reverse direction from the perforation in the deposits. In this embodiment, the two spring-loaded disk valves 117 are configured to open in response to a prescribed pressure exerted by the material of the mortar component as it is ejected from its respective reservoir 43, 45. The pressure prescribed to open each one of the spring-loaded disk valves 117 is 10psi in this mode. Of course, it will be understood that the prescribed pressure can be selected at any appropriate level and does not need to be limited to 10 psi. The two spring loaded disc valves 117 are shown in a closed condition in Figure 11 and in an open condition in Figure 12.

The supply nozzle 103 comprises a nozzle body 121 having an inner end 123 and an outer end 125.

The nozzle body 121 comprises a threaded coupling on the inner end 123 configured as a threaded female coupling section 124 adapted to threadably fit the male coupling section. 55 in the lower end section 48 of the elongated body 31. The female coupling section 124 includes a coupling pocket 126 for receiving the upper end section 47 of the elongate body 31.

The nozzle body 121 further comprises a cavity 128 contiguous with the coupling pocket 126 for housing the valve body 105.

The nozzle body 121 further comprises a mixing zone 127 adjacent the outer end 125 where the materials of the two mortar components emanating from the reservoirs 43, 45 come together to mix to form the mortar for delivery as a highly fluid mixture. viscose.

The nozzle body 121 incorporates two flow passages 129, each adapted to communicate at one end with one of the respective flow passages 107 in the valve assembly 101 and to communicate at the other end with the mixing zone 127. More particularly, each flow passage 129 has an inlet end 131 configured as a stud 133 adapted to be received in a sealing manner in the corresponding basins 115 at the outlet ends 113 of the flow passages 107 in the valve assembly 101 The studs 133 extend into the cavity 128 in which the valve body 121. is housed. In addition, each flow passage 129 has an outlet end 135 that opens into the mixing zone 127.

In the arrangement shown, each flow passage 129 is defined by the first section 136 communicating with the entry end 131, a second section 137 communicating with the exit end 135 and a third intervention section 138 housing a reduction in the cross-sectional area from the first section 136 to the second section 137. In the embodiment shown, the output end 135 is configured as a series of output ports 139 and each second section 137 comprises a plurality of flow galleries (not shown) extending to the mixing zone 127 and opening in the mixing zone through the series of output ports.

The mixing zone 127 is defined within the confines of the body 121 and is surrounded by the first and second faces 141, 143 arranged in an angular relationship opposite each other and which is biased outwards towards an exit opening 137 through which the mortar is discharged into the perforation. The exit ends 135 of the flow passages 129 open on the first and second faces 141, 142. With this arrangement, the mixing zone 127 comprises a mixing chamber 143 defined between the first and second faces 141, 142. mixing chamber 143 is already opened by this is further defined an outlet 145 through which the mortar can be discharged.

The angular relationship between the paths of the material currents of the mortar components arising from the exit ports 139 in the mixing zone 127 facilitates the mixing of the materials of the mortar components to form the mortar before discharging the mortar. mortar as a viscous fluid mixture from the mixing zone 127 adjacent the outer end 125. In particular, the currents of the materials of the mortar components emerging from the exit ports 139 intersect with the mixing zone 127 to create shear which increases the mixing efficiency.

In operation, the reservoirs 43, 45 are loaded with the materials of the mortar components when charging through the lower end section 48 of the elongate body 31. The mounting of the supply head 39 is then installed in position in the body elongated 31.

When a section of the drilling that is being drilled requires filling of mortar, the drill string is partially retracted to expose the area where it will be filled with mortar and the loaded mortar supply system 10 is lowered by the drill string using the overshot fitting (not shown) adjusted to the wire line system. During the descent of the loaded mortar supply system 10, the two spring-loaded disk valves 107 function to prevent the ingress of water into the bore in the tanks 43, 45 as explained above. When the loaded mortar supply system 10 is in the desired location, the water is pumped into the drill string and pressurized. The pressurized water flows in the rear end assembly 37 and in the inlet side of the flow path 81. Once the water pressure exceeds the prescribed level (which in this mode is 100psi), the valve is made to flow control in response to pressure 89 is opened and thus water is allowed to flow along the fluid path 81 and into the two upper chambers 67. The resulting fluid pressure exerted on the pistons 61 moves the pistons to the lengths of their respective cylinders 63, causing the contraction of volume of the two lower chambers 65. This expels the material of the mortar components from the reservoirs 43, 45 and causes the ejected material to flow along the respective steps of flow 107 in the valve assembly 101. The respective flows of ejected material exert pressure on the two spring-loaded disk valves 107 that open when the pressure exceeds the prescribed level (which is 10psi in this case). odality). The respective flows of expelled material enter the nozzle body 121 and pass along the flow passage 129 to the mixing zone 127. The flows of the expelled material enter the mixing zone 127 and are mixed by reacting chemically to form the mortar. The flow path of the material ejected is described in Figure 13 by flow lines identified by reference number 147. The mortar formed in this way is described schematically in Figure 13 and is identified by the reference numeral 150. As alluded to above, the flows of ejected material emerging from exit ports 139, intersect in mixing zone 127 to create shear that increases mixing efficiency. The resulting mortar 150 is discharged as a viscous fluid mixture through the outlet 145 defined at the outer end 125 of the nozzle body 121 and supplied in the bore. Upon completion of the mortar supply process, the supply of pressurized water to the borehole is completed and the mortar supply system 10 is recovered by hoisting it to the surface using the overshot (not shown) fixed to the system. wire line.

From the foregoing, it is evident that the present embodiments provide a system and method for supplying materials from the mortar components to a location within a borehole in which the mortar component materials are mixed together to form the mortar and provide the mortar as a fluidizable substance that can set after being supplied. A particular feature of the embodiment is that the mortar components are mixed together at the location where it is supplied into the hole and then delivered to the hole.

In the described embodiments, the two reservoirs 43, 45 were described as containing charges of two mortar component materials that chemically react to form the mortar. Indeed, the two tanks 43, 45 can contain other types of mortar materials.

In addition, the two deposits can in fact be loaded with the same type of material. With this provision, the two deposits would simply provide a greater capacity to maintain such material.

In addition, the delivery system may comprise more than two reservoirs to facilitate the mixing of more than two components to form the fluidizable substance to be delivered.

It should be appreciated that the scope of the invention is not limited to the scope of the described modality.

In another embodiment, which is not shown, the nozzle body 121 may comprise a first part configured as a disposable unit and a second part configured as a retainer / containment member (such as a crimp or other mount) for releasably fastening the first part to the valve assembly 101. In this embodiment, the mixing chamber may be defined by an area within the first part. With this arrangement, the first part can be discarded after use and thus avoid the need to clean it after use.

Although the embodiment has been described with particular reference to the supply of mortar in a perforation, it should be understood that the invention need not necessarily be limited to said application. The invention may be applicable for the supply of other fluidizable substances in boreholes or in other remote locations. By way of example, the invention may find application in the supply of fluidizable substances in a remote section of a pipe that would otherwise not be easily accessible in order to repair or block said section of pipe.

Modifications and improvements can be made without departing from the scope of the invention. The reference to position descriptions, such as lower and upper, is they should be taken in the context of the modalities represented in the figures and should not be taken as limiting the invention for the literal interpretation of the term but rather as they would be understood by the person skilled in the art to which it is addressed.

Throughout this specification, unless the context requires otherwise, the word "comprises" or variations such as "comprise" or "comprising" shall be understood to imply the inclusion of an indicated whole number or a group of integers. but not the exclusion of any other integer or group of integers.

Claims

1. A supply system for the supply of a fluidizable substance as a mixture, CHARACTERIZED because it comprises a first and second component in a location to which the supply system is transported, where the supply system comprises a supply head, a first reservoir to receive a charge of the first component, a second tank for receiving a load of the second component and an operable drive means for causing the supplies of the first and second component to be transported to the supply head in which they are mixed and supplied at the location .

2. The supply system according to claim 1, characterized in that the first and second reservoirs are configured as variable volume chambers so that the volume contraction of the chambers causes the first and second component to be expelled from these and transported to the head of supply.

3. The supply system according to Claim 2, CHARACTERIZED in that each chamber of variable volume is defined by a piston and cylinder arrangement, where the piston can be selectively moved within the cylinder to produce the volume variation of the chamber.

4. The supply system according to Claim 2 or 3, CHARACTERIZED in that the drive means responds to the fluid pressure to cause the volume contraction of the chambers.

5. The supply system according to claim 3 or 4, characterized in that the drive means includes the pistons, where the arrangement consists in that the pistons respond to the fluid pressure exerted on the sides thereof opposite to the moving cameras inside. of the respective cylinders and thus cause the volume contraction of the cameras.

6. The delivery system according to Claim 4 or 5, CHARACTERIZED in that the delivery system further comprises a control valve means for controlling the supply of fluid pressure to the pistons to cause the movement of the same along the cylinders, the control valve means is configured to allow the admission of fluid under pressure in response to a supply of fluid pressure that exceeds a prescribed level.

7. The delivery system according to Claim 4, 5 or 6, CHARACTERIZED in that the fluid pressure supply comprises the fluid supplied in a drill string in the borehole, where the configuration consists in that the delivery system is configured to be accommodated within the drill string exposed to the fluid within the drill string.

8. The supply system according to Claim 7, CHARACTERIZED in that the delivery system comprises an additional control valve means for preventing the ingress of fluid from the bore in the reservoirs through the supply head.

9. The supply system according to Claim 8, CHARACTERIZED in that the additional control valve means is disposed between the supply head and the reservoirs and is configured to allow The fluid flows between the tanks and the supply head with the fluid pressure in the tanks exceeding a prescribed level.

10. The delivery system according to any of the preceding Claims, CHARACTERIZED in that the delivery head defines a mixing zone in which the first and second components are joined together to mix them to form a fluid mixture.

11. The supply system according to Claim 10, characterized in that the mixing zone comprises a mixing chamber.

12. The supply system according to Claim 11, CHARACTERIZED in that the supply head comprises a body and the mixing zone is defined within the confines of the body.

13. The supply system according to claim 10, 11 or 12, characterized in that the mixing zone is surrounded by a first and second face arranged in opposite angular relation to each other and diverging outwards towards an exit opening.

14. The supply system according to Claim 13, CHARACTERIZED in that the outlet opening is provided at the periphery of the body.

15. The supply system according to Claim 13 or 14, CHARACTERIZED in that the body includes a first flow path and a second flow path, wherein the first flow path is for communication with the first reservoir and opening on the first side and where the second flow path is for communication with the second reservoir and opening on the second face.

16. A mortar supply system for the supply of mortar comprising a settable mixture of the first and second fluidizable components in a perforation, CHARACTERIZED in that the mortar supply system comprises a delivery system according to any of the preceding Claims and wherein the first and second fluidizable component comprise said first and second component.

17. A mortar supply system for the supply of mortar, CHARACTERIZED because it comprises a settable mixture of the first and second fluidizable component in a perforation, where the supply system comprises a supply head, a first reservoir for receiving a charge of the first component, a second reservoir for receiving a charge of the second component and an operable driving means for causing the supplies of the first and second component to be transported to the supply head in which they are mixed and delivered in the perforation.

18. A method for the supply of a fluidizable substance as a fluidizable mixture comprising a first and second component, CHARACTERIZED in that the method comprises the use of a delivery system according to any of Claims 1 to 15.

19. A method for the supply of mortar as a castable fluidizable mixture comprising a first and second component in a perforation, CHARACTERIZED in that the method comprises the use of a mortar supply system according to Claim 16 or 17.

20. A method of supplying a fluidizable substance as a fluidizable mixture comprising a first and second component from a first location to a second location spaced from the first location, CHARACTERIZED in that the method comprises transporting a load of the first component and a load of the second component separated from each other from the first location to the second location, mixing the first and second components to form the fluidizable mixture and discharging the fluidizable mixture at the second location.

21. A method of supplying mortar as a fluidizable mixable mixture comprising a first and second component in a perforation, CHARACTERIZED in that the method comprises transporting a charge of the first component and a charge of the second component separated from each other in the perforation, mixing the first and second component for forming the fluidizable mixture and discharging the fluidizable mixture in the perforation.

22. A mortar supply system for the supply of mortar comprising a settable mixture of the first and second fluidizable component in a borehole, CHARACTERIZED in that the delivery system comprises a supply head, a first tank for receiving a load of the first component, a second reservoir for receiving a charge from the second reservoir and operable driving means for causing supplies of the first and second component to be transported to the supply head in which they are mixed and delivered in the perforation, where the supply head comprises a body and a defined mixing zone within the confines of the body, wherein the mixing zone is surrounded by a first and second face arranged in opposite angular relation to each other and moving outwards towards an exit opening, where the outlet opening is provided at the periphery of the body, where the body includes a first flow path and a second flow path, where the first flow path is for communication with the first reservoir and opening on the first face and the second flow path is for communication with the second reservoir and opening on the second face .

23. A mortar supply system for the supply of mortar comprising a settable mixture of a first and second fluidizable component in a borehole, CHARACTERIZED in that the delivery system comprises a supply head, a first tank for receiving a load of the first component, a second reservoir for receiving a charge of the second component and an operable driving means for causing the supplies of the first and second component to be transported to the supply head where they are mixed and supplied in the perforation, where the actuating means responds to the pressure of fluid arising during use from the fluid supplied in a drill string in the bore, a control valve means for controlling the supply of fluid pressure to the drive means, wherein the control valve means is operable to allow the admission of fluid under pressure in response to a supply of pressure fluid exceeding a prescribed level and other means of control valve to prevent the ingress of fluid from a bore in the reservoirs through the supply head, where the other control valve means is disposed between the supply head and deposits and is operable to allow fluid to flow between the tanks and the supply head when the fluid pressure in the tanks exceeds the prescribed level.

24. A mortar supply system for the supply of mortar comprising a settable mixture of a first and second fluidizable component in a borehole, CHARACTERIZED in that the delivery system comprises a supply head, a first tank for receiving a load of the first component, a second tank for receiving a load of the second component, and an operable drive means for making the supplies of the first and second component are transported to the supply head where they are mixed and supplied in the bore, where the drive means responds to the fluid pressure arising during use from the fluid supplied in the drill string in the borehole, a control valve means for controlling the supply of fluid pressure to the driving means, wherein the control valve means is operable to allow the admission of fluid under pressure in response to a supply of fluid pressure exceeding a prescribed level and another control valve means for preventing the ingress of fluid from the perforation to the reservoirs through the supply head, where the other control valve means is disposed between the reservoirs and the supply head when the fluid pressure in the tanks exceeds a prescribed level, where the supply head comprises a body and a mixing zone defined within the confines of the body, where the mixing zone is surrounded by a first and second face arranged in opposite angular relation to each other and moving outwards in the direction of an exit opening, where the outlet opening is provided in the periphery of the body, where the body includes a first flow path and a second flow path, being the first flow path for communication with the first reservoir and opening on the first side and the second flow path for communication with the second reservoir and opening on the second side.