UPRIGHT TANK JET SYSTEM
A jet system is beneficial in keeping a drilling particulates of a drilling fluid evenly mixed within an upright storage tank having a side wall, a top wall and a bottom wall. The jet system has a nozzle on each half section of a horizontally disposed upper arm and a plurality of nozzles on each half section of a lower rotatable arm disposed adjacent the bottom wall for keeping particulates of the drilling fluid suspended above the upper and lower arm. The upper arm redistributes and suspends particulates of the drilling fluid from near the bottom of the tank above the upper arm to thereby keep particulates of the drilling fluid suspended throughout the entire volume.
The present invention relates to an improved upright tank jet system for keeping particulates of a drilling fluid evenly mixed and suspended throughout the total volume of the fluid in the tank.
BACKGROUND OF THE INVENTIONIt is of utmost importance to keep particulates within drilling fluid evenly mixed, dispersed and suspended to thereby maintain an optimal density for the drilling fluid and eliminate the potential for flocculation of the particulates on the floor of the tank. Keeping particulates of the drilling fluid evenly dispersed helps prevent valves from becoming clogged, pumps from failing prematurely, unwanted and expensive tank cleanings required to remove buildup, and the loss of drilling fluid resulting from the foregoing problems. Therefore, there is a need to provide a jet system for an upright drilling fluid tank that prevents particulates from settling out of the drilling fluid while keeping the drilling fluid and particulates evenly mixed and dispersed throughout the entire volume of the fluid in the tank.
Upright holding tanks for storing drilling fluids can be 20 foot in height by 12 foot in diameter and have a capacity of 400 barrels. The drilling fluid stored in the tank is commonly referred to as drilling “mud”. The drilling mud may consist of bentonite clay (gel) with additives such as barium sulfate (barite or “bar”), calcium carbonate (chalk) or hematite. Both barite and hematite are high-density additives. Thus, drilling fluids or drilling “mud” is typically a dense, viscous and cohesive fluid. Moreover, the high-density additives such as bar have a tendency to settle out of the drilling fluid over time if left unagitated or disrupted. Therefore, an upper jet system in combination with a lower jet system is needed to provide maximum disruption and agitation of the total volume of drilling fluid in the tank to keep particulates of the drilling fluid, such as bar, suspended and evenly dispersed in the drilling fluid. There is also a need to redistribute drilling fluid from the bottom portion of the tank to the upper portion of the tank through the upper jet system to keep an even distribution of particulates. In addition, because of the density of the drilling fluids, there is a need to provide a jet system in the upper portion of the tank to thereby agitate, disrupt and suspend particulates of the drilling fluid within the upper portion of the tank.
BRIEF SUMMARY OF THE INVENTIONTherefore, it is a primary object, feature, or advantage of the present invention to improve over the state of art.
It is a further object, feature, or advantage of the present invention to provide a jet system capable of operating and meeting working objectives in a “deep” surface environment, such as in an upright tank having a drilling fluid depth of 20 feet.
Yet another object, feature, or advantage of the present invention is to provide a jet system wherein the nozzles remain unclogged of the heavy weighted drilling “mud”.
A further object, feature, or advantage of the present invention is to provide a jet system wherein the equipment costs for constructing the jet system are minimal.
Yet another object, feature, or advantage of the present invention is to provide a jet system wherein the lower arm covers the entire diameter of the tank bottom.
Still a further object, feature, or advantage of the present invention is to provide a jet system wherein the upper arm redistributes fluid taken from the bottom of the tank into the portion of the tank above the upper arm.
Another object, feature, or advantage of the present invention is to provide a jet system wherein the nozzles are capable of operating between 60-80 psi, the common operating head pressure for drilling fluid pumps.
A still further object, feature, or advantage of the present invention is to provide a jet system wherein the upright tank is used to store oil rig drilling fluids.
Yet another object, feature, or advantage of the present invention is to provide a jet system wherein the total volume of drilling fluid in the tank is agitated to prevent “dead spots” from developing in the tank where particulates, such as “bar”, can settle out of the drilling fluid.
A further object, feature, or advantage of the present invention is to provide a jet system wherein the lower arm is rotatable to sweep over the bottom of the tank to thereby prevent flocculation of the particulates, clogging of the valves and nozzles, and destruction or damage to pumps.
Another object, feature, or advantage of the present invention is to provide a jet system wherein the nozzles have an orifice size best suited for creating a jet stream of the drilling fluid.
A further object, feature, or advantage of the present invention is to provide a jet system wherein the upper arm may also rotate to redistribute drilling fluid from the bottom of the tank above the upper arm and agitate particulates of the drilling fluid above the upper arm.
A still further object, feature, or advantage of the present invention is to provide a jet system wherein the upright tank has a 20 foot height and a 12 foot diameter for standing in the upright position.
Yet another object, feature, or advantage of the present invention is to provide a jet system wherein the jets on the lower arm are counterbalanced and offset from each other to cause the lower arm to rotate.
One or more of these and/or other objects, features or advantages of the present invention will become apparent from the specification and claims that follow.
According to one aspect of the present invention, a jet system for keeping particulates of a drilling fluid evenly mixed within an upright storage tank having a side wall, a top wall and a bottom wall is disclosed. The jet system has a nozzle on each half section of a horizontally disposed upper arm and a plurality of nozzles on each half section of a lower rotatable arm disposed adjacent the bottom wall for keeping particulates of the drilling fluid suspended above the lower arm. The upper arm redistributes and suspends the drilling fluid near the bottom wall of the tank above the upper arm to thereby keep particulates of the drilling fluid suspended throughout the entire volume of drilling fluid within the tank. In the preferred form, the lower arm is in fluid communication with the upper arm and the lower arm is rotatable. The upper arm is positioned 9 feet from the bottom wall of the tank. Each nozzle on the upper arm is positioned on outermost portions of each half section.
A new method for keeping particulates of a drilling fluid evenly mixed and dispersed within an upright storage tank having a side wall, a top wall, and a bottom wall is disclosed. The method includes providing a jet system having a nozzle on each half section of an upper arm and a plurality of nozzles on a lower rotatable arm within the tank. The method also includes redistributing the drilling fluid at or near the bottom wall of the tank above the upper arm and suspending particulates of the drilling fluid above the upper arm and the lower arm by agitating the entire volume of drilling fluid in the tank. In the preferred form, the method includes angling the plurality of nozzles on the lower arm alternately upward and downward from vertical for rotating the lower arm and sweeping the bottom wall of the tank of settled particulates of the drilling fluid. The method also includes the step of angling each nozzle on the upper arm away from vertical for suspending and agitating particulates of the drilling fluid above the upper arm. The method also includes providing the nozzle on the upper arm being positioned on outermost portions of each half section.
While the specification concludes with claims particularly pointing out and distinctly claiming the invention, it is believed that the present invention will be better understood from the following description taken in conjunction with the accompanying drawings in which:
The present invention includes a number of aspects, all of which have broad and far-reaching application. Although specific embodiments are described herein, the present invention is not limited to these specific embodiments. The present invention contemplates numerous other options and design and use of the jet system.
As shown in
When the jet system 10 is operating, as shown in
It is preferred that the pipe and fittings be constructed of a material capable of withstanding the corrosion effects of the chemicals within the drilling fluid. For example, the pipe and fittings could be fabricated from chromoly steel.
The preferred embodiment of this present invention has been set forth in the drawings and specification and those specific terms are employed, either used in the generically descriptive sense only and are not used for the purposes of limitation. Changes in the form proportion of parts as well as the substitution of equivalence are contemplated as circumstances may suggest or render expedient without departing from the spirit and scope of the invention as further defined in the following claims.
Claims
1. A jet system for keeping particulates of a drilling fluid evenly mixed within an upright storage tank having a sidewall, a top wall and a bottom wall, the jet system comprising:
- a nozzle on each half section of a horizontally disposed upper arm;
- a plurality of nozzles on each half section of a lower rotatable arm disposed adjacent the bottom wall for keeping particulates of the drilling fluid suspended above the lower arm; and
- the upper arm for redistributing and suspending the drilling fluid from near the bottom wall of the tank above the upper arm to thereby keep particulates of the drilling fluid suspended throughout the entire volume of drilling fluid within the tank.
2. The jet system of claim 1 wherein the lower arm is in fluid communication with the upper arm.
3. The jet system of claim 1 wherein the upper arm is rotatable.
4. The jet system of claim 1 wherein the upper arm is positioned 9 feet from the bottom wall of the tank.
5. The jet system of claim 1 wherein each nozzle on the upper arm is positioned on outermost portions of each half section.
6. A method for keeping particulates of a drilling fluid evenly mixed and dispersed within an upright storage tank having a sidewall, a top wall and a bottom wall, the method comprising:
- providing a jet system having a nozzle on each half section of an upper arm and a plurality of nozzles on a lower rotatable arm within the tank;
- redistributing the drilling fluid at or near the bottom wall of the tank above the upper arm; and
- suspending particulates of the drilling fluid above the upper arm and the lower arm by agitating the entire volume of drilling fluid in the tank.
7. The method of claim 6 further comprising the step of angling the plurality of nozzles on the lower arm alternately upward and downward from vertical for rotating the lower arm and sweeping the bottom wall of the tank of settled particulates of the drilling fluid.
8. The method of claim 6 further comprising the step of angling each nozzle on the upper arm away from vertical for suspending and agitating particulates of the drilling fluid above the upper arm.
9. The method of claim 6 further comprising providing the nozzle on the upper arm being positioned on outermost portions of each half section.
10. A jet system for keeping a drilling fluid evenly mixed within an upright storage tank having a sidewall, a top wall and a bottom wall, the jet system comprising:
- a drilling fluid inlet;
- an upper arm horizontally disposed within the tank and in fluid communication with the drilling fluid inlet;
- a nozzle positioned on outermost portions of each half section of the upper arm;
- a lower arm horizontally disposed adjacent the bottom wall of the tank and in fluid communication with the upper arm;
- a plurality of nozzles on each half section of the lower arm; and
- the nozzle on each half section of the upper arm for redistributing the drilling fluid from near the bottom wall of the tank above the upper arm to thereby keep the drilling fluid evenly mixed.
11. The jet system of claim 10 wherein the nozzle on one half section of the upper arm is oriented upward at +15 degrees from vertical and the nozzle on the other half section is oriented upward −15 degrees from vertical.
12. The jet system of claim 10 wherein one half section of the upper arm is operatively attached to the sidewall of the tank.
13. The jet system of claim 10 wherein one half section of the upper arm egresses the sidewall of the tank.
14. The jet system of claim 10 wherein half sections of the upper arm are connected with a tee fitting.
15. The jet system of claim 14 wherein a center arm being vertically disposed is connected to the tee fitting.
16. The jet system of claim 15 wherein the lower arm is rotatably mounted to the center arm using a swivel joint.
17. The jet system of claim 16 wherein a cross fitting connects half sections of the lower arm to the center arm and a cap fitting.
18. The jet system of claim 17 wherein the cap fitting is operatively housed within a seat on the bottom wall of the tank.
19. The jet system of claim 18 wherein the cap fitting rests on top of a wear plate within the seat on the bottom wall of the tank.
20. The jet system of claim 10 wherein the plurality of nozzles on one half section of the lower arm are oriented alternately upward +12 degrees and downward −12 degrees from vertical.
21. The jet system of claim 20 wherein the plurality of nozzles on the other half section of the lower arm are oriented alternately downward +12 degrees and upward −12 degrees from vertical.
22. The jet system of claim 10 wherein the plurality of nozzles on the lower arm are oriented to cause the lower arm to rotate.
23. The jet system of claim 10 wherein an elbow fitting egresses the sidewall near the bottom wall of the tank for suctioning the drilling fluid near the bottom wall to be pumped back into the tank through the drilling fluid inlet.
24. The jet system of claim 10 wherein half sections of the lower arm extend outward to a position adjacent the sidewall of the tank.
25. The jet system of claim 10 wherein the upper arm is rotatably mounted to a swivel joint for rotating the upper arm and the lower arm.
26. A method for keeping particulates of a drilling fluid evenly mixed and dispersed within an upright storage tank having a sidewall, a top wall and a bottom wall, the method comprising:
- providing a jet system having an upper arm horizontally disposed within the tank, a nozzle positioned on outermost portions of each half section of the upper arm, and a lower arm horizontally disposed adjacent the bottom wall of the tank having a plurality of nozzles on each half section;
- suctioning the drilling fluid from the tank at or near the bottom wall;
- pumping the drilling fluid into the upper arm and the lower arm;
- redistributing the drilling fluid within the tank using each nozzle on the upper arm and the plurality of nozzles on the lower arm; and
- suspending particulates of the drilling fluid within the tank by agitating the entire volume of drilling fluid with each nozzle on the upper arm and the plurality of nozzles on the lower arm to thereby keep the drilling fluid and particulates evenly mixed.
27. The method of claim 26 further comprising providing a swivel joint between the upper arm and the lower arm.
28. The method of claim 27 further comprising the step of rotating the lower arm using the plurality of nozzles.
29. The method of claim 26 further comprising the step of sweeping particulates of the drilling fluid from off the bottom wall using the plurality of nozzles.
30. The method of claim 26 further comprising the step of disrupting and suspending particulates of the drilling fluid above the upper arm using the nozzle on each half section of the upper arm.
Type: Application
Filed: Mar 16, 2007
Publication Date: Sep 18, 2008
Inventor: Tobin A. Warren (Pavillion, WY)
Application Number: 11/687,167
International Classification: E21B 21/06 (20060101); E21B 1/00 (20060101);