Multiple activation-device launcher for a cementing head

Information

  • Patent Grant
  • 8069922
  • Patent Number
    8,069,922
  • Date Filed
    Thursday, April 2, 2009
    15 years ago
  • Date Issued
    Tuesday, December 6, 2011
    12 years ago
Abstract
A multiple activation-device launching system for a cementing head comprises a launcher body and at least one launching chamber that are sized to receive one or more activation devices therein. The activation devices are launched into the principal process-fluid stream inside the cementing head, and may be darts, balls, bombs, canisters and combinations thereof. The launching chambers are in fluid communication with an external power source for launching the activation device into the principal process-fluid stream.
Description
BACKGROUND OF THE INVENTION

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.


The invention is related in general to equipment for servicing subterranean wells. The invention relates to a deepsea cement head that is intended to drop a combination of darts, balls, bombs and canisters in order to activate downhole equipment, launch cementing plugs, deliver chemical products, or the like.


Existing tools implement a modular design with darts that are preloaded in baskets within the modules. The modules are connected to one another using clamps. The darts are held in place mechanically and released by removing the mechanical obstruction and redirecting the flow of the pumped fluid through the dart basket. The darts are then pumped through the tool by the fluid. The first dart to be launched is placed in the lowest module, with subsequent darts passing through the baskets vacated by the earlier darts.


Darts in prior designs are launched by blocking the bypass flow of the process fluid and forcing the fluid through the dart chamber. The dart forms an initial seal when placed into the basket. When fluid enters the dart chamber, pressure builds and breaks the seal, forcing the dart out of the basket, through the tool and into the main process-fluid stream.


Some prior art designs consist of modules similar to those described in U.S. Pat. Nos. 4,624,312 and 4,890,357. The darts are loaded from the topmost module, through the swivel if necessary, and pushed down to their respective baskets with a long rod. The modules have valves that are used to select between the dart and the bypass flow. The valve itself serves as the mechanical obstruction that prevents the dart from prematurely launching. When the valve is turned, it simultaneously opens a passage for the dart while closing the passage of the bypass flow.


It remains desirable to provide improvements in wellsite surface equipment in efficiency, flexibility, and reliability.


SUMMARY OF THE INVENTION

The present invention allows such improvement.


In a first aspect, the present invention relates to a multiple activation-device launching system for a cementing head, comprising a launcher body comprising at least one launching chamber, the launching chamber sized to receive one or more activation devices therein, the launching chamber in fluid communication with a power source for launching the activation device into the principal process-fluid stream.


In another aspect, the present invention aims at a method for deploying one or more activation devices into a process-fluid system into a process-fluid system utilizing an angled launching system for a cementing head comprising a launcher body comprising a primary valve and at least one launching chamber, the launching chamber equipped with a secondary valve and sized to receive one or more activation devices therein, the launching chamber in fluid communication with a power source for launching one or more activation devices into the principal process-fluid stream.


In a further aspect, the present invention pertains to a method for deploying one or more activation devices into a process-fluid system utilizing an angled launching system for a cementing head comprising a launcher body comprising at least one launching chamber and a device chamber, the launching chamber sized to receive one or more activation devices therein, the launching chamber in fluid communication with an external power source for launching one or more activation devices into the principal process-fluid stream.


An embodiment of the invention comprises a single activation-device launcher module that contains multiple launching chambers arranged at an angle relative to the main axis of the tool. The activation devices may be darts, balls, bombs or canisters. The devices are loaded into their respective chambers directly or in a cartridge, but directly from the open air rather than through the length of the tool. A variety of methods can be used to launch the activation devices. The activation devices may also contain chemical substances that, upon exiting the launching chamber, are released into the well.


The advantages of the general implementation of the embodiment is that more activation devices may be fit into a shorter length tool, simplifying the loading process, and making the baskets more accessible for maintenance purposes. This allows to easily maintaining the tool on the rig when the system from the art can only be serviced at the district.


In another embodiment of the invention, the system may comprise any number of launching chambers (at least one, but preferably two, three, four or more), each with an axis at an angle relative to the main axis of the tool. The chamber(s) may be positioned at the same level, or a different level (e.g. in spiral, or stages). When the activation devices are forced out of the chamber(s), they enter the main body of the tool in the correct orientation and are swept away by the pumped fluid (hereafter called process fluid) to serve their intended purpose. The exact number of chambers is not essential, indeed, multiple unique launching methods that will work independently from the arrangement of the launching chambers are contemplated.


In a preferred embodiment, the activation devices are launched with process-fluid power as the motive power. Each launching chamber is preferably linked to the main flow of process fluid using a small pipe, hose, or integral manifold. A valve (primary valve) blocks the main flow on command, diverting the fluid into the launching chambers. Each launching chamber would comprise a valve (secondary valve) that alternately allows or blocks the flow of fluid into the corresponding launching chamber. All valves may be manually or remotely actuated. In a launch procedure, all secondary valves are initially closed, the primary valve is initially open. To launch an activation device, the operator opens the secondary valve corresponding to the activation device's chamber and then closes the primary valve. Once the activation device is successfully ejected from the launching chamber, the primary valve is reopened and the launch procedure is repeated for launching additional activation devices.


In another embodiment, external fluid power is used to launch the activation devices from their chambers. The external fluid power employed to force the activation device from its chamber may comprise water or fluid connected directly behind the activation device; a hydraulic cylinder with a rod that forces the dart out of its chamber, a hydraulic piston without a rod that seals within the launching chamber (activation device on one side, external fluid on the other), a bladder behind the activation device that fills from an external fluid source pushing the activation device out of the chamber, or a similar type of fluid power as will be appreciated by those skilled in the art.


Although the disclosed launching system is mainly being presented in the context of well cementing, it will be appreciated that the process-fluid stream could comprise other well fluids including, but not limited to, drilling fluids, cement slurries, spacer fluids, chemical washes, acidizing fluids, gravel-packing fluids and scale-removal fluids.





BRIEF DESCRIPTION OF THE DRAWINGS


FIGS. 1A-1D are conceptual views of a multiple activation-device launcher that employs valves to divert process-fluid flow to the launching chamber, forcing an activation device to exit the launching chamber. FIGS. 1A-1D depict a dart, a ball, a canister and a bomb, respectively, occupying the launching chamber.



FIG. 2 is a conceptual view of a multiple activation-device launcher featuring an external power source that, when energized, forces the activation device to exit the launching chamber.



FIG. 3 is a conceptual view of a multiple activation-device launcher employing a fluid as the external power source.



FIG. 4 is a conceptual view of a multiple activation-device launcher employing a piston as the external power source.



FIG. 5 is a conceptual view of a multiple activation-device launcher employing an inflatable bladder as the external power source.



FIG. 6 is a conceptual view of a multiple activation-device launcher employing a rod and piston as the external power source.



FIG. 7 is an external view of the invention featuring multiple launching chambers.





DETAILED DESCRIPTION

According to a preferred embodiment, the invention involves the diversion of process-fluid flow from the principal flow stream through the launcher body to one of the launching chambers. Referring to FIGS. 1A-1D, the launcher module comprises two principal elements—the launcher body 1 which is the primary conduit through which the process fluid flows; and one or more launching chambers 2 containing one or more activation devices 7 and connected to the primary conduit. Activation devices are launched by closing the primary valve 5, which diverts process-fluid flow from the principal flow direction 3 into the conduit 4 connecting the main body to the launching chambers. Each launching chamber shall be equipped with a secondary valve 6 that allows or blocks process-fluid flow into the chamber. When the secondary valve is opened, and process fluid flows into the launching chamber, the activation device is pushed out of the launching chamber and into the principal process-fluid stream. The activation device 7 may be a dart (FIG. 1A), a ball (FIG. 1B), a canister (FIG. 1C) or a bomb (FIG. 1D).


The primary valve preferably needs only to withstand enough differential pressure to force the activation device from the launching chamber. The primary valve may be a plug valve, a butterfly valve, a balloon-shaped bladder that inflates from the center to seal the main fluid passage, a doughnut-shaped bladder that inflates from the edges to seal the main fluid passage, a pressure-operated rubber component similar to those used in BOPs or inflatable packers or similar type valve, as will be appreciated by those skilled in the art.


The secondary valves may be any variety of on-off valves, but are preferably designed to be easily removed and cleaned after repeated exposure to particle-laden fluids such as cement slurry. The secondary valve may be a plug valve, a butterfly valve, a balloon-shaped bladder that inflates from the center to seal the main fluid passage, a doughnut-shaped bladder that inflates from the edges to seal the main fluid passage, a pressure-operated rubber component similar to those used in BOPs or inflatable packers, or similar type valve as will be appreciated by those skilled in the art.


In another embodiment, shown in FIG. 2, an external device 8 forces the one or more activation devices from the launching chamber 7. Several types of external power are envisioned.


As shown in FIG. 3, water or fluid connected directly behind the activation device may be used to expel the device from its chamber. The fluid is not directly connected to the main process fluid. A hydraulic line 9 conveys the fluid to the launching chamber 2. The operator opens a one-way valve 10, allowing the fluid to flow into the launching chamber and carry the activation device 7 out of the launching chamber and into the main process-fluid flow.


As shown in FIG. 4, a hydraulic line 9 conveys fluid to the launching chamber 2. After the operator actuates the one-way valve 10, the fluid enters the launching chamber and forces a piston 11 to move and push the activation device 7 out of the launching chamber and into the main process-fluid flow.


As shown in FIG. 5, a hydraulic line 9 conveys fluid to the launching chamber 2. After the operator actuates the one-way valve 10, the fluid enters the launching chamber and inflates a bladder 12. As the bladder inflates, it pushes the activation device 7 out of the launching chamber and into the main process-fluid flow.


As shown in FIG. 6, a hydraulic rod 13 extends out of the upper portion of the launching chamber 2, and is connected to a piston 14 inside the launching chamber. A hydraulic seal 15 isolates the inner and outer portions of the launching chamber. The operator pushes the rod further into the launching chamber, causing the piston to force the activation device 7 out of the launching chamber and into the main process-fluid flow.



FIG. 7 is an external view of the present invention with multiple launching chambers.


The activation device depicted in FIGS. 2-7 is a dart; however, as shown in FIGS. 1A-1D, activation devices may also include balls, bombs and canisters.


The activation devices may be filled with a chemical substance that, upon release from the launching chamber, is dispensed from the activation device into the process fluid. The chemical release may occur at any time after the activation device is launched-from the moment of launching to any time thereafter. Delayed chemical release may be performed for a number of reasons including, but not limited to, avoiding fluid rheological problems that the chemical would cause if added during initial fluid mixing at surface, and triggering the initiation of chemical reactions in the fluid (e.g., cement-slurry setting and fracturing-fluid crosslinking) at strategic locations in the well.


The process fluid may comprise one or more fluids employed in well-service operations. Such fluids include, but are not limited to, drilling fluids, cement slurries, spacer fluids, chemical washes, acidizing fluids, gravel-packing fluids and scale-removal fluids.


The present invention also comprises a method of operating the multiple activation-device launcher depicted in FIG. 1 comprising inserting one or more activation devices 7 in at least one of the launching chambers 2, and closing the secondary valves 6 in each of the launching chambers. Process fluid is then pumped through the launcher body 1. When it is time to release an activation device 7, the primary valve 5 is closed and the secondary valve 6 is opened in the launching chamber of choice. This diverts process-fluid flow through the launching chamber 2, forcing the activation device 7 to exit into the launcher body 1. After the activation device 7 is launched, the secondary valve 6 is closed, the primary valve 5 is reopened to restore process-fluid flow through the launcher body 1, and the activation device 7 is carried to its destination. This process is then repeated until a sufficient number of activation devices have been deployed to complete the treatment. One or more activation devices may contain a chemical substance that is released to the process fluid after deployment into the process fluid.


In another embodiment, the present invention pertains to a method of operating the multiple activation-device launcher depicted in FIG. 2 comprising inserting one or more activation devices 7 in at least one of the launching chambers 2, and connecting the chambers to an external power source 8. Power sources include, but are not limited to, a fluid connected directly behind the activation device 7 (FIG. 3), a hydraulic cylinder 14 with a rod 13 (FIG. 6), a hydraulic piston 11 without a rod (FIG. 4), and an inflatable bladder 12 (FIG. 5). Process fluid is pumped through the launcher body 1. When it is time to release an activation device 7, the external power source 8 is activated, forcing the activation device 7 to exit into the launcher body 1. This process is then repeated until a sufficient number of activation devices have been deployed to complete the treatment. One or more activation devices may contain a chemical substance that is released to the process fluid after deployment into the process fluid.


The methods of operating the multiple activation-device launcher depicted in FIGS. 1 and 2 may further comprise activation devices containing a chemical substance that is released after the activation device exits the launching chamber. The activation device may begin dispensing the chemical substance immediately upon launching, or at any time thereafter.


In the methods of operating the multiple activation-device launcher depicted in FIGS. 1 and 2, the process fluid may comprise one or more fluids employed in well-service operations. Such fluids include, but are not limited to, drilling fluids, cement slurries, spacer fluids, chemical washes, acidizing fluids, gravel-packing fluids, scale-removal fluids. In addition, the activation devices may comprise darts, balls, bombs and canisters.


The preceding description has been presented with reference to presently preferred embodiments of the invention. Persons skilled in the art and technology to which this invention pertains will appreciate that alterations and changes in the described structures and methods of operation can be practiced without meaningfully departing from the principle, and scope of this invention. Accordingly, the foregoing description should not be read as pertaining only to the precise structures described and shown in the accompanying drawings, but rather should be read as consistent with and as support for the following claims, which are to have their fullest and fairest scope.

Claims
  • 1. A multiple activation-device launching system for a cementing head, comprising a launcher body that comprises at least three unblocked launching chambers, the launching chambers sized to receive one or more activation devices therein, each launching chamber in fluid communication with a hydraulic piston without a rod that seals the launching chamber, wherein the activation devices comprise one or more members of the list comprising: darts, bombs and canisters.
  • 2. The system of claim 1, wherein each of the launching chambers is arranged at an angle relative to the axis of the launcher body, and the launching of the activation devices is independent of process-fluid flow.
  • 3. The system of claim 1, wherein at least one activation device is filled with a chemical substance, and the chemical substance is released after launching.
  • 4. A method for deploying one or more activation devices into a process-fluid stream comprising: (i) providing a multiple activation-device launching system for a cementing head, comprising a launcher body that comprises at least three unblocked launching chambers, each launching chamber sized to receive one or more activation devices therein, each launching chamber in fluid communication with a hydraulic piston without a rod that seals the launching chamber;(ii) installing the launching system on the cementing head;(iii) installing at least one activation device into at least one launching chamber;(iv) connecting each launching chamber to a fluid source that is independent of the process-fluid stream; and(v) causing the piston to move through the launching chamber, thereby injecting one or more activation devices into the process-fluid stream,wherein the activation-devices comprise one or more members of the list comprising: darts, bombs and canisters.
  • 5. The method of claim 4, wherein: i. one or more activation devices is filled with a chemical substance; andii. the chemical substance is released into the process fluid after launching.
Parent Case Info

This application is a conversion from and claims benefit of a provisional application 61/195,499, filed on Oct. 7, 2008.

US Referenced Citations (73)
Number Name Date Kind
3357491 Jones et al. Dec 1967 A
4246967 Harris Jan 1981 A
4624312 McMullin Nov 1986 A
4809776 Bradley Mar 1989 A
RE33150 Boyd Jan 1990 E
4890357 Pinto et al. Jan 1990 A
4934452 Bradley Jun 1990 A
5004048 Bode Apr 1991 A
5095988 Bode Mar 1992 A
5236035 Brisco et al. Aug 1993 A
5343968 Glowka Sep 1994 A
5544705 Jones et al. Aug 1996 A
5722491 Sullaway et al. Mar 1998 A
5762139 Sullaway et al. Jun 1998 A
5787979 Giroux et al. Aug 1998 A
5829523 North Nov 1998 A
5890537 Lavaure et al. Apr 1999 A
5950725 Rondeau et al. Sep 1999 A
5960881 Allamon et al. Oct 1999 A
6009944 Gudmestad Jan 2000 A
6056053 Giroux et al. May 2000 A
6082451 Giroux et al. Jul 2000 A
6206095 Baugh Mar 2001 B1
6237686 Ryll et al. May 2001 B1
6244350 Gudmestad et al. Jun 2001 B1
6279654 Mosing Aug 2001 B1
6302140 Brisco Oct 2001 B1
6360769 Brisco Mar 2002 B1
6419015 Budde et al. Jul 2002 B1
6491103 Allamon Dec 2002 B2
6517125 Brisco Feb 2003 B2
6520257 Allamon Feb 2003 B2
6527057 Fraser, III et al. Mar 2003 B2
6571880 Butterfield, Jr. et al. Jun 2003 B1
6575238 Yokley Jun 2003 B1
6597175 Brisco Jul 2003 B1
6672384 Pedersen et al. Jan 2004 B2
6755249 Robison et al. Jun 2004 B2
6799638 Butterfield, Jr. Oct 2004 B2
6802372 Budde Oct 2004 B2
7040401 McCannon May 2006 B1
7055611 Pedersen et al. Jun 2006 B2
7093664 Todd et al. Aug 2006 B2
7143831 Budde Dec 2006 B2
7168494 Starr et al. Jan 2007 B2
7172038 Terry et al. Feb 2007 B2
7182135 Szarka Feb 2007 B2
7249632 Robichaux et al. Jul 2007 B2
7252152 LoGiudice et al. Aug 2007 B2
7255162 Stevens et al. Aug 2007 B2
7281582 Robichaux et al. Oct 2007 B2
7281589 Robichaux et al. Oct 2007 B2
7296628 Robichaux et al. Nov 2007 B2
7353879 Todd et al. Apr 2008 B2
7387162 Mooney, Jr. et al. Jun 2008 B2
7503398 LoGiudice et al. Mar 2009 B2
7537052 Robichaux et al. May 2009 B2
7607481 Barbee Oct 2009 B2
7841410 Barbee Nov 2010 B2
7878237 Angman Feb 2011 B2
20040020641 Budde Feb 2004 A1
20040231836 Budde Nov 2004 A1
20050205264 Starr et al. Sep 2005 A1
20050205265 Todd et al. Sep 2005 A1
20050205266 Todd et al. Sep 2005 A1
20060027360 Basso Feb 2006 A1
20070068679 Robichaux et al. Mar 2007 A1
20070158078 Boyd Jul 2007 A1
20080053660 Angman Mar 2008 A1
20080060811 Bour et al. Mar 2008 A1
20080060820 Bour et al. Mar 2008 A1
20080296012 Peer et al. Dec 2008 A1
20100084145 Giem et al. Apr 2010 A1
Foreign Referenced Citations (10)
Number Date Country
0801704 Feb 2003 EP
1540131 Jun 2005 EP
1903180 Mar 2008 EP
2009227 Dec 2008 EP
2663678 Dec 1991 FR
9848143 Oct 1998 WO
2004011770 Feb 2004 WO
2005052311 Jun 2005 WO
2005108738 Nov 2005 WO
WO 2007016313 Feb 2007 WO
Related Publications (1)
Number Date Country
20100084145 A1 Apr 2010 US
Provisional Applications (1)
Number Date Country
61195499 Oct 2008 US