US3120260A

US3120260A - Waste gas disposal flare

Info

Publication number: US3120260A
Application number: US11196A
Authority: US
Inventors: Hugh R Thompson
Original assignee: Continental Oil Co
Current assignee: ConocoPhillips Co
Priority date: 1960-02-26
Filing date: 1960-02-26
Publication date: 1964-02-04
Anticipated expiration: 1981-02-04

Description

Feb. 4, 1964 H. R. THOMPSON 3,120,260

WASTE GAS DISPOSAL FLARE Filed Feb. 26, 1960 INVENTOR. HUGH THOMPSON A TTORNEY United States Patent 3,120,260 WASTE GAS DISPOSAL FLARE Hugh R. Thompson, New Orleans, La, assignor to Continental Oil Company, Ponca City, Okla, a corporation of Delaware Filed Feb. 26, 1960, Ser. No. 11,196 2 Claims. (Cl. 158-99) This invention relates to an improved waste gas burner for use in installations surrounded by water such as an elf-shore drilling platform.

The drilling and production efforts involved in the removal of hydrocarbons necessarily results in the production of certain gaseous matter which is caused to be undesirable. Ihe disposition of undesirable gaseous matter may be more readily affected by installations at or near the site of the drilling platform. The conventional method of disposal is to expend the gas into a flare or waste gas burner which is located a suflicient distance from the drilling rig so that it will not constitute a hazard during the hydrocarbon production. However, when the drilling platform is situated in a water saturated or water surrounded area, installation and maintenance of the waste gas burner becomes a complex and expensive problem. In prior devices, removal of the waste gas burner from the near proximity of the drilling platform required that the burner be mounted in the water. This method of mounting the burner, however, required that the foundation be placed on the bed of the body of water. The burner was then mounted upon the foundation and piping was placed under water along the bed of the water from the platform to the burner. The installation was necessarily extremely expensive. The installation was diflicult and expensive to place and maintain, and in addition, was subject to physical damage because of corrosion and wave action.

Therefore, it is an object of this invention to provide an improved flare line or waste gas burner which remains above water level.

It is a further object of this invention to mount the waste gas burner in such a manner that it will be adjustable substantially for variation in wind direction.

It is a further object of this invention to provide a waste gas burner which is cheap to install and easy to maintain.

Other objects, features, and advantages of the invention will become apparent from the following description and claims when read in view of the accompanying drawings, in which:

FIG. 1 is a side view of the waste gas burner as installed on a drilling platform;

FIG. 2 is a detailed drawing of the waste gas burner which shows the details of mounting and construction; and

FIG. 3 is a top view of the waste gas burner as installed on a drilling platform.

Similar numbers will be used throughout all figures where common structural elements are shown.

Referring to FIG. 1, a drilling platform is supported above a bed 11 of an ocean 12 or other body of water by a means such as a plurality of posts 13. A drilling derrick 14 is supported on platform 10 which provides a means for drilling and maintenance of a well 15. A flare line or waste gas burner assembly generally designated as 16 is mounted on a corner 17 of platform 10 and is connected to the end of well by a pipe 18. A swivel joint 19, commonly referred to as a chicksan swivel, is used to connect the end 20 of burner asesrnbly 16 to pipe 18. Guy wires 21 are used to add rigidity to the waste gas burner. A second set of guy wires 22 is used to rotate burner 16 about a fulcrum located at swivel joint 19 in a plane substantially parallel to platform 10. A

"ice

guy wire 23 is used to give horizontal stability to burner assembly 16.

Referring to FIG. 2, a more detailed drawing of burner assembly 16 is shown. A pipe or burner stack 25 is connected through an elbow 25 to swivel joint 19 which connects by a pipe 18 or other suitable means to well 15. Stack 25 may be of any suitable strong material such as steel, aluminum, or iron. For the purpose of reduction of Weight the preferred embodiment was formed from tubular aluminum. In order to form a rigid pipe 25,

collars

30, 31, and 32 were rigidly secured to the beginnin g, middle, and end, respectively, of pipe 25. Mounted at right angles to collar 31 and rigidly secured thereto are a plurality of posts 33 which extend outwardly from the pipe substantially in the form of an X. Each of the

collars

30 and 32 have a like number of rigidly secured rings 34 in a similar angular position as posts 33. At tached between each of the rings 34 and a corresponding post 33 is guy wire 21. The guy wire may be tightened by any well known manner such as turn-buckles or the like. A guy wire 35 likewise joins the extremes of the posts 33. The plurality of collars, posts, and guy wires all tend to make a rigid burner stack 25, thus, greatly reducing the weight and cost of the pipe. -It is to be understood that other methods for strengthening the pipe may be used such as angle iron, I beams, or the like. Further, the pipe itself could be made of tubular material having sufiicient strength that guy wiring will not be needed. For example, a tubular construction having telescopic sections of reduced diameter would have suflicient strength to eliminate the need for guying. However, the latter mentioned methods for increasing the structural strength of pipe 25 tend to also increase its cost. Thus, a preferred embodiment is a single tubular pipe with suflicient guying to give it structural rigidity. A burner 4i? is mounted at the end of pipe 25 which is farthest from the platform 10. The burner may be of any well known form, for example, a pipe having a plurality of holes 41 is illustrated. Any well known means such as electrical ignition may be used to ignite the escaping gas from holes 41, thereby, eliminating the hazard caused by the accumulation of non-burned gas. Pipe 25 has a length suthcient to insure that burner 40 is a safe distance from platform 19. A guy wire 42 is attached from one of the rings 34 or collar 32 to platform 10 through a pulley or other slippage device to a guy wire storage device such as a take-up or ratchet reel 44. Guy wire 22, likewise, connects from one of the rings 34 on collar 32, and to the side of the platform (not shown) at right angles to the tie point on the platform where guy wire 42 attaches. Like guy wire 42, guy wires 22 has a suitable pulley and gay wire storage device which are not shown.

In operation, waste gas from well 15 enters pipe 18 through swivel joint 19 and elbow 26 to the waste gas burner 16. The gas is conducted down burner stack 25 to burner 40 and is expelled through holes 41. The expelled gas is ignited by any suitable means and burned as rapidly as it escapes. If the wind is blowing against the platform towards the flare line, the position of

guy wires

42 and 22 may be in any desired location. However, (referring to FIG. 3) if the wind should be coming in the direction of arrow 50, the flare line would better operate in position 51 since this would cause the flaming gases to move away from the drilling platform 10. If the wind should be coming from the direction of arrow 52, the waste gas burner would be located in a position such as 53. This would likewise cause the burning gas to be expelled in a direction which is away from the drilling platform 10. However, if the wind is coming from an intermediate direction such as indicated by arrow 55, the waste gas burner would have a position approxestablished, will be securely anchored.

im ately as shown in FIG. 3. If the Wind is blowing in a direction opposite to arrow 5%, the flare line would be located at position 53 since this would constitute the least hazard to the drilling platform. The main purpose for positioning the flare line is to minimize the probability that flaming gases will enter the vicinity of the drilling platform. The positioning of the flare line is accomplished by lengthening or shortening

guy wires

42 and 22 such that the flare line in, when the position has been Guy 23 may be lengthened or shortened in order to maintain the flare line 16 in a substantially horizontalplane. Thus, a waste gas burner as has been disclosed which adapts itself quite readily to a drilling platform such as is used for oiishore drilling purposes, the complicated problem of mounting and maintaining the flare line has been eliminated, and in addition, the high cost of such a flare line has been greatly reduced. Further, a flare line has been disclosed which attaches itself quite readily to variations in wind direction, thus reducing to a minimum the hazardous disposal of waste gas.

Although this invention has been described with respect to particular embodiments thereof, it is not to be so limited, as changes and modifications may be made therein which are within the spirit and scope of the in.- vention as defined by the appended claims.

I claim: 1. in combination with a drilling platform a waste gas disposal flare comprising:

a burner stack having an outer and inner end, said urner stack comprising: a thin-Walled tubular member having first and second collars at its ends; a third collar substantially centrally located between said first and second collars; posts mounted transversely said centrally located collar and having one end rigidly attached thereto; and

a plurality of guy wires attached between said outer collars and secured to the midportion of said burner stack by said transversedposts;

a gas burner attached to said outer end;

pivotal supporting means attached to said platform, said means having one end receiving the inner end of said burner stack, said pivotal supporting means and said burner stack designed to receive waste gas and convey said gas to said burner; and

means secured to said platform for rigidly supporting said burner stackin a substantially horizontal position, said last-named means comprising:

a plurality of ratchet reels secured to said platform; r

a plurality of guy Wires, each of said guy wires. disposed between said burner stack and one of said ratchet reels whereby the horizontal, angular relationship of said burner stack with said drilling platform may be varied by adjusting the length of said guy wires with said ratchet reels. 2. A device as described in claim 1 and further characterized in that said central posts have a plurality of guy wires strung therebetween.

References Cited in the file of this patent UNITED STATES PATENTS

Claims

1. IN COMBINATION WITH A DRILLING PLATFORM A WASTE GAS DISPOSAL FLARE COMPRISING: A BURNER STACK HAVING AN OUTER AND INNER END, SAID BURNER STACK COMPRISING: A THIN-WALLED TUBULAR MEMBER HAVING FIRST AND SECOND COLLARS AT ITS ENDS; A THIRD COLLAR SUBSTANTIALLY CENTRALLY LOCATED BETWEEN SAID FIRST AND SECOND COLLARS; POSTS MOUNTED TRANSVERSELY SAID CENTRALLY LOCATED COLLAR AND HAVING ONE END RIGIDLY ATTACHED THERETO; AND A PLURALITY OF GUY WIRES ATTACHED BETWEEN SAID OUTER COLLARS AND SECURED TO THE MIDPORTION OF SAID BURNER STACK BY SAID TRANSVERSED POSTS; A GAS BURNER ATTACHED TO SAID OUTER END; PIVOTAL SUPPORTING MEANS ATTACHED TO SAID PLATFORM, SAID MEANS HAVING ONE END RECEIVING THE INNER END OF SAID BURNER STACK, SAID PIVOTAL SUPPORTING MEANS AND SAID BURNER STACK DESIGNED TO RECEIVE WASTE GAS AND CONVEY SAID GAS TO SAID BURNER; AND MEANS SECURED TO SAID PLATFORM FOR RIGIDLY SUPPORTING SAID BURNER STACK IN A SUBSTANTIALLY HORIZONTAL POSITION, SAID LAST-NAMED MEANS COMPRISING: A PLURALITY OF RATCHET REELS SECURED TO SAID PLATFORM; A PLURALITY OF GUY WIRES, EACH OF SAID GUY WIRES DISPOSED BETWEEN SAID BURNER STACK AND ONE OF SAID RATCHET REELS WHEREBY THE HORIZONTAL, ANGULAR RELATIONSHIP OF SAID BURNER STACK WITH SAID DRILLING PLATFORM MAY BE VARIED BY ADJUSTING THE LENGTH OF SAID GUY WIRES WITH SAID RACHET REELS.