Location and stimulation methods and apparatuses utilizing downhole tools
View Patent ↗A propellant tool for use in a hydrocarbon bearing formation. The tool includes a tubular body having a connector on each end for connection with other tubular members within a tubular string. A coded marker is positioned on the tubular body and a propellant chamber is positioned on an outside surface of the tubular body. A propellant ignition mechanism positioned on the tubular body for igniting the propellant in the propellant chamber.
1. A tubular string for positioning in a wellbore, the tubular string comprising:
a. a plurality of markers positioned along the tubular string, the markers each including multiple passive elements arranged to create a distinct code readable as a reader passes through the tubular;
b. a plurality of propellant chambers positioned on an outside surface of the tubular string, each propellant chamber being in the vicinity of at least one of the markers; and
c. a propellant ignition circuit associated with each propellant chamber.
2. The tubular string according to claim 1 , wherein the propellant chambers are annular sleeve structures formed around a section of the tubular string.
3. The tubular string according to claim 2 , wherein the annular sleeve structures are formed of a material from the group consisting of a high strength polymer, a carbon fiber composite, and a ported steel sheeting.
4. The tubular string according to claim 1 , wherein the ignition circuit is at least partially within an ignition housing positioned on an outer surface of the tubing string.
5. The tubular string according to claim 1 , wherein the ignition circuit includes at least one of an igniter or detonator.
6. The tubular string according to claim 1 , wherein the tubular string comprises a series of discrete tubular sections connected together.
7. The tubular string according to claim 1 , further comprising induction coils to supply power to the ignition circuit.
8. A tubular string for positioning in a wellbore, the tubular string comprising:
a. a plurality of markers positioned along the tubular string;
b. a plurality of propellant chambers positioned on an outside surface of the tubular string, each propellant chamber being in the vicinity of at least one of the markers;
c. a propellant ignition circuit associated with each propellant chamber;
d. wherein an inner surface of the tubular string includes at least one latch profile associated with each propellant chamber, wherein the latch profile is configured to engage an activation plug traveling through the tubular string; and
e. wherein the latch profile is located on a sleeve covering the ignition circuit.
9. The tubular string according to claim 8 , wherein the latch profile is positioned between the propellant chamber and the ignition circuit.
10. A propellant tool for positioning in a wellbore, the tool comprising:
a. a tubular body, the tubular body having a connector on each end for connection with other tubular members within a tubular string;
b. a coded marker positioned on the tubular body;
c. a propellant chamber positioned on an outside surface of the tubular body, wherein the propellant chamber includes a polymer sleeve extending over at least a portion of the tubular body and a propellant positioned in a space between the sleeve and outside surface of the tubular body; and
d. a propellant ignition mechanism positioned on the tubular body.
11. The propellant tool according to claim 10 , wherein the tubular body is formed of a non-magnetic material.
12. The propellant tool according to claim 10 , wherein propellant chamber is positioned between the coded marker and the ignition mechanism.
13. The propellant tool according to claim 10 , wherein the ignition mechanism is a circuit including a hand-shake sensor for confirming the presence of an activation plug.
14. The propellant tool according to claim 10 , wherein the marker comprises multiple rings spaced along a length of the tubular body to create a distinct code readable as a reader passes through the tubular.
15. The propellant tool according to claim 10 , wherein the propellant chamber comprises an annular structure formed around the tubular body.
16. The propellant tool according to claim 15 , wherein the annular structure is formed of at least one of a carbon fiber material or a polymer material.
17. The propellant tool according to claim 10 , wherein the propellant chamber comprises an annular structure formed of a polymer shell wall and the polymer shell wall includes at least one internal pocket containing an agent for dissolving the polymer.
18. The propellant tool according to claim 17 , wherein the pocket has a lining resistant to the dissolving agent, wherein detonation of the tool ruptures the pocket and brings the dissolving agent into contact with the polymer.
19. The propellant tool according to claim 10 , wherein the ignition mechanism is a circuit at least partially within an ignition housing positioned on an outer surface of the tubular body.
20. The propellant tool according to claim 10 , further comprising an activation plug traveling into the tubular body and wherein an inner surface of the tubular body includes at least one latch profile configured to engage the activation plug.
21. The propellant tool according to claim 20 , wherein the latch profile is positioned between the propellant chamber and the ignition mechanism.
22. The propellant tool according to claim 20 , wherein the activation plug includes a reader capable of detecting the coded marker and deploying a set of keys to engage the latch profile in response to detecting the coded marker.
23. The propellant tool according to claim 22 , wherein the latch profile is formed on a sliding sleeve positioned within the tubular body.
24. The propellant tool according to claim 23 , wherein the sleeve includes a first position covering the ignition mechanism and a second position uncovering the ignition mechanism.
25. The propellant tool according to claim 20 , wherein the tubular body and the activation plug have circuitry adapted to transfer electrical power from the activation plug to operate a device on the tubular body.
26. The propellant tool according to claim 25 , wherein the circuitry adapted to transfer electrical power includes induction coils in the tubular body and in the activation plug.
27. The propellant tool according to claim 25 , wherein the transfer of electrical power is used to activate the firing mechanism.
28. The propellant tool according to claim 20 , wherein the activation plug contains an explosive capable of destructing the plug.
29. The propellant tool according to claim 20 , wherein the activation plug is formed of a drillable material.
30. The propellant tool according to claim 20 , where the activation plug is formed of a dissolvable material and contains an encapsulated pocket with a dissolving agent, wherein the pocket is configured to rupture upon being subject to a pressure wave and allowing contact of the dissolving agent with the dissolvable material.
31. The propellant tool according to claim 10 , wherein at least one burst disc is positioned in a wall of the tubular body.
32. The propellant tool according to claim 31 , wherein a movable isolation sleeve covers the at least one burst disc.
33. The propellant tool according to claim 32 , wherein the isolation sleeve includes a latch profile configured to be engaged by an activation plug traveling through the tubular body.
34. A propellant tool for positioning in a wellbore, the tool comprising:
a. a tubular body, the tubular body having a connector on each end for connection with other tubular members within a tubular string;
b. a propellant chamber including a sleeve positioned over an outside surface of the tubular body, the propellant chamber containing at least one propellant type positioned in a space between the sleeve and outside surface of the tubular body;
c. a propellant ignition mechanism positioned on the tubular body and configured to ignite the propellant; and
d. an event sensor coupled with a controller and a power source, the event sensor configured to activate the ignition mechanism upon the occurrence of a specified event.
35. The propellant tool according to claim 34 , wherein the event sensor is at least one of (i) a pressure transducer configured to detect a coded sequence of pressure pulses and activate the ignition mechanism upon detection of the coded sequence; (ii) a seismic sensor configured to detect a seismic signal and activate the ignition mechanism upon detection of the seismic sensor; or (iii) a timer configured to active the ignition mechanism at some time subsequent to positioning of the propellant tool in the wellbore.