|Publication number||US3270810 A|
|Publication date||Sep 6, 1966|
|Filing date||Feb 13, 1963|
|Priority date||Feb 13, 1963|
|Publication number||US 3270810 A, US 3270810A, US-A-3270810, US3270810 A, US3270810A|
|Inventors||Johnston Leslie A|
|Original Assignee||Johnston Leslie A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (15), Referenced by (29), Classifications (10)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Sept. 6, 1966 L. A. JOHNSTON 3,270,810
POLISHED ROD PROTECTOR AND BLOW DEFLECTOR Filed Feb. 13. 1963 2 Sheets-Sheet 1 INVENTOR. LESLIE A. JOHNSTON BY/MW ATTORNEYS sept- 6, 1966 L. A. JOHNSTON 3,270,810
POLISHED ROD PROTECTOR AND BLOW DEFLECTOR Filed Feb. 15. 1963 2 Sheets-Sheet 2 INVENTOR. LESLIE A. JOHNSTON ATTORNEYS United States Patent 3,270,810 POLISHED ROD PROTECTOR AND BLOW DEFLECTOR Leslie A. Johnston, 1225 E. 18th St., TulsmOkla. Filed Feb. 13, 1963, Ser. No. 258,294 Claims. (Cl. 166-84) This invention relates to a polished rod protector. More particularly, the invention relates to a device for protecting polished rods as used in the oil industry for pumping wells.
In my co-pending application filed July 25, 1962, having a serial number of 212,292 for a Polished Rod Protector now Patent No. 3,186,722, I have set forth a polished rod protector particularly adaptable for use to protect the polished rods utilized on beam and hydraulic type pumping units for pumping oil wells. This invention relates substantially to improvements, modifications and alternate embodiments of the prior filed application.
It is an object of this invention to provide a polished rod protector for use in protecting polished rods of oil wells including improved and simpler means of mounting the protector on the oil well.
Another object of this invention is to provide a polished rod protector for use in protecting the polished rods of oil wells including improved means of disengaging the device from the stuffing box.
Another object of this invention is to provide a polished rod protector for use in protecting the polished rods of oil wells including improved blow deflection means in the device.
Another object of this invention is to provide an integral blow deflector device for oil wells for use to prevent the spraying of oil and salt water when the stuffing box of the well fails.
Another object of this invention is to provide a blow deflector device having improved means for readily mounting the device on an oil well.
Another object of this invention is to provide improvements in a bellows member as utilized on a polished rod protector including reinforcing means to substantially prolong the life of the bellows. These and other objects and a better understanding of the invention may be had by referring to the following description and claims taken in conjunction with the attached drawings, in which:
FIGURE 1 is a plan view of a portion of an oil well showing a polished rod protector according to this invention mounted on the well.
FIGURE 2 is a cross-sectional view of the polished rod protector and a portion of the bellows as taken along the line 2-2 of FIGURE 1.
FIGURE 3 is a plan view of an alternate embodiment of this invention showing the invention serving as a blow deflector mounted on the stufling box of an oil well.
FIGURE 4 is a top view of the blow deflector of FIG- URE 3 with the blow deflector shown pivoted open to disclose means whereby it is readily mounted onto or dismounted from an oil well.
FIGURE 5 is a cross-sectional view taken along the line 55 of FIGURE 3 of the improved blow deflector embodiment of this invention.
FIGURE 6 is a cross-sectional view of a portion of an improved bellows as utilized on the polished rod protector of this invention showing a means for reinforcing the bellows to substantially extend the life of the bellows. FIGURE 6 shows the bellow substantially compressed.
FIGURE 7 is a cross-sectional view of the improved bellows of FIGURE 6 showing the bellows expanded.
3,270,810 Patented Sept. 6, 1966 ice This invention may be described as a polished rod protector. More particularly, but not by way of limitation, the invention may be described as a polished rod protector for use with an oil well pumping system having a polished rod reciprocated through a stuffing box, said stuffing box positioned a distance above the surface of the earth, the polished rod protector comprising a hollow bonnet member supported to said stufling box, said bonnet member having an opening in the top and bottom surfaces thereof to receive said polished rod, said bonnet member having an exhaust opening therein, and a bellows member aflixed at its lower end to said bonnet member to said upper opening in said bonnet member,
said bellows member receiving said polished rod therein, said bellows member affixed at its upper end to said polished rod.
Referring first to FIGURE 1, the polished rod protector of this invention is shown in plan view, the protector being indicated generally by the numeral 10. The polished rod protector is shown supported to a stuffing box 12 as typically used on an oil well, the stufling box being in turn supported on a pumping T 14 which is afiixed to a well head 16. A polished rod 18 is reciprocated within the stufling box, pumping T and well head and connects to a sucker rod string (not shown) which extends to the bottom of the well to reciprocate a pump. Produced oil flows away from the well through a tubular lead line 20.
The polished rod protector consists of a hollow bonnet member 22 having affixed to its upper end a bellows 24. The upper end of the bellows 24 is affixed to the polished rod 18 such as by means of a clamp 26 and the lower end of the bellows is aflixed to the upper end of the bonnet member 22.
In the preferred embodiment the bonnet member 22 consists of a lower portion 28, which serves in the manner of a base for the device, and an upper portion 30. The lower portion 28 is supported to stuffing box 12 such as by means of chains 32v which extend beneath all or at least some portions of the stuffing box 12 and through eyelet openings 34 in brackets 36 afiixed to the lower portion 28 of the bonnet 22.
The upper portion 30 of the bonnet 22 is supported to the lower portion 28 such as by means of suitcase type releasable clamps 38.
An exhaust outlet is provided in the bonnet member 22 such as by means of provision of an integrally formed tubular extension 40. The outlet extension 40 provides means for air to breathe in and out of the bonnet 22 as the bellows 24 is reciprocated up and down with polished rod 18. To retard dust entering into bonnet 22 and to conduct away any blow-by oil or water which may occur due to the failure of stufling box 12, a discharge conduit 42 may be affixed to the tubular extension 40 such as by a clamp 44. The discharge conduit 42 preferably terminates near the surface of the earth 46 so that any oil or water which is discharged by failure of stufiing box 12 will be conveyed to the earth immediately adjacent the well rather than sprayed over surrounding vegetation.
The details of construction of the polished rod protector of FIGURE 1 may better be seen in the crosssectional view of FIGURE 2. A resilient seal pad 48 is provided between the stufling box 12 and the lower portion 28 of the bonnet 22 so that the interior of the stufiing box 12 is sealed in close communication with the interior of the bonnet member 22 through the lower opening 50 in the bonnet and opening 52 in the seal pad 48, each of which openings receives the polished rod 18 therethrough.
An upper opening 54 in the bonnet member 22 receives the polished rod 18. The bellows 24 may be affixed to the upper end of the bonnet member 22 in a variety of 3 ways. One means is by the use of a circular clamp ring 56 which holds the end portion of the bellows against the upper surface of the upper portion 30 of bonnet 22 by means of screws 58.
A ring seal 60 is preferably provided between the lower portion 28 and the upper portion 30 of bonnet member 22 to effect a complete seal of the bonnet member.
Affixed to the lower interior portion 28 of the bonnet are upstanding brackets 62 which support a gasket member 64. The gasket member 64 is preferably constructed of some material such as plastic, rubber and so forth, which has long wearing characteristics. The gasket member 64 is preferably provided with a groove 66 to receive the portions of the bracket 62 by which it is supported. Although the gasket member 64 may be of a multitude of configurations it is preferably provided with an integrally formed radially extending flange portion 68 which serves to deflect any oil, salt water, gas or mixtures thereof which may escape out of the stufling box 12 and through openings 50 into the bonnet 22. The flange 68 of the gasket member 64 prevents the blowing contaminants from passing upwardly through the upper opening 54 of the bonnet and thereby prevents the contaminants from being blown into the atmosphere and widely disbursed. Any accumulation of oil, gas or water escaping from stufling box 12 will pass out of the bonnet 22 through the exhaust opening 70 communicating through the tubular extension 40 as shown in FIGURE 1.
The gasket member 64 has an opening therein to receive the polished rod 18. The opening is preferably slightly larger than the polished rod 18 so that the gasket member is not in substantial friction engagement with the polished rod but the annulus between the gasket member and polished rod is so small as to prevent the passage of any consequential fluid or gases therethrough upon the failure of stufiing box 12.
Referring to FIGURE 3, an alternate embodiment of the invention is shown. The embodiment of FIGURE 3 serves substantially the purposes of the polished rod protector of FIGURE 1 and FIGURE 2 except that no provision is made to protect the polished rod from dust. Whereas the embodiment of FIGURE 1 and FIGURE 2 is primarily adapted to be used in very dusty locations, such as frequently occurs in the western portion of Texas as an example, the embodiment of FIGURE 3 is pri marily adapted to prevent damage to vegetation and property adjacent a well upon the failure of a stufling box. In highly populated areas such as the west coast of the United States where high pressure wells are located adjacent residences and other valuable property, great amounts of damage may occur when the stuffing box fails and the oil, salt water and gas are sprayed into the atmosphere to be carried by the winds over large areas. In many of such areas there is no dust problem so that it is not necessary to protect the polished rod against dust,
but a requirement exists to protect adjacent property owners from damage when a stuffing box fails. This is substantially the purpose of the blow deflectors of FIG- URES 3, 4 and 5.
Referring first to FIGURE 3, the device is shown in an external plan view and consists basically of a bonnet member 22 supported to the top of a stufling box 12 in the same manner as described for FIGURE 2, that is, by the use of chains 32 extending below the stuffing box 12 and through eyelet openings 34 in brackets 36. An integral tubular extension 41) is provided, with FIGURE 3 shown having the extension 40 extending towards the viewer. A clamp 44 is provided to receive a discharge conduit (not shown).
Referring to FIGURE 5, the device is shown in crosssection. The bonnet 22 is provided with an upper opening 54 and a lower opening 50. Seal pad 48 seals the interior of the bonnet 22 in closed communication with the interior of the stufling box 12. Supported in the upper opening 54 is a gasket member 64 substantially identical to the gasket member as shown in FIGURE 2. The gasket member 64 is provided with a groove 66 to receive the upper opening 54 of bonnet 22. An adjustable clamp 72 holds the gasket member 64 in proper position around the polished rod 18. As has been previously described, the gasket member 64 may be made of any material such as rubber, plastic or so forth which has long wearing characteristics and which will not score or abrade the polished rod 18. The bore of gasket member 64 is preferably slightly larger than the exterior of the polished rod 18 for reasons previously mentioned. The gasket member 64 is likewise preferably designed to include an integral radially extending flange 68.
The blow deflector of FIGURES 3, 4 and 5 provides a means of containing any blowing gas, oil and water which may escape from the stuffing box 12. The gasket member 64 prevents any harmful quantities of the fluid escaping past the polished rod 18 and contains such fluid within the bonnet 22. The contained fluid and gas may then be vented through exhaust opening 70. By means of a conduit (not shown) connected to tubular extension 40, escaped fluid or gas may be conducted to some safe disposition.
A means of readily mounting the bonnet 22 on a well and about polished rod 18 is shown in FIGURE 4. The bonnet member 22 is bifurcated into two portions designated as 22A and 22B. A hinge 73 supports the portions together so that the device may be easily mounted around the polished rod 18 and around the gasket member 64. Although a variety of means may be provided for supporting the two halves 22A and 22B together, the preferred arrangement is to design the halves so that each includes one-half of the tubular extension 40. In this manner, by means of clamp 44, as shown in FIG- URE 3, the two halves are supported together.
The polished rod protector of FIGURE 1 and FIGURE 2 utilizes a bellows member to shield the polished rod from blowing dust and dirt. In my previously referred to copending application I have set forth a means of constnucting a bellows by joining discs of plastic or some similar type flexible material at the outer and inner alternate peripheries. This is an inexpensive and completely satisfactory means of providing a bellows, except that when a highly flexible material is used to manufac ture a long bellows member, a great amount of stress is placed around the inner peripheries of the upper portion of the bellows and a high incidence of failure may occur. FIGURES 6 and 7 show a means of providing an improved bellows. The bellows is constructed primarily of flat circular sheets of plastic material 74 arranged in adjacent uniaXial relationship with alternate outer peripheries of the flat circular sheets joined at 76. This is accomplished by Welding the outer peripheries 76 by the application of heat and pressure to the plastic and, according to the plastic used, bonding cement may also be utilized.
Each of the flat circular sheets 74 are provided with an opening 78 which receives the polished rod as the device is applied to protect the polished rod according to this invention. The bellows is. completed in its basic formation by bonding together the inner peripheries 80 of alternate discs 74. Bonding of these is likewise obtained by the application of heat and pressure, or, when necessary, the application of a cement. The bellows thus formed is satisfactory except, as has been previously mentioned, there is a great amount of strain placed by the continuous expansion and contraction of the bellows at the inner peripheries 80. An important element of this invention is the provision of means of reducing the incidents of failure at the inner peripheries.
To substantially improve the life of the bellows, reinforcing discs 82 made of some resilient material are applied to each side of the bonded inner peripheries 80. The reinforcing discs 82 are likewise provided with an inner opening 84 substantially conforming to the opening 78 in the flat circular body discs 74. The reinforcing discs 82 are of an exterior diameter less than the flat body discs 74 and preferably of a diameter approximately onehalf of the diameter of the body discs 74, although the external diameter of the discs 82 may vary according to the design of the overall bellows and the types of mate rials used. The material composing the reinforcing discs 82 is preferably of a resilient type easily bonded to the material used to manufacture the flat circular body discs 74 and preferably is of the same material as the flat body discs 74. The reinforcing discs 82 are preferably of a material having greater stillness or a material which is less flexible than the material utilized for the body discs 74. This may be accomplished, although the same material is utilized, by using material having greater thickness than the material utilized for the body discs.
FIGURE 7 shows the bellows of this invention expanded and disclose the means whereby the reinforcing discs 82 serve to strengthen the bellows. The extra stiffness of the reinforcing discs 82 causes the flat body discs 74 to expand in a curved are rather than a sharp angle at the inner periphery 80. This distributes the tension as the bellows is expanded and contracted and more completely distributes the area of fold and flexing. In this manner, the overall body discs 74 assume the Weight of supporting the lower sections of the bellows 24 rather than concentrating the stress in the immediate areas of the inner peripheries 80.
When the inner peripheries of the reinforcing discs 82 and the main body discs 74 are bonded or welded together they become, in eifect, a unitary structure having highly increased strength.
Although the invention has been described as it pertains to polished rods of oil wells operated in a vertical position, it can be seen that the principles of the invention may equally as well be applied to the protection of reciprocating rods, plungers and so forth operated in a horizontal position.
Although this invention has been described in a certain degree of particularity, it is manifested that many changes may be made in the details of construction and the arrangement of components without departing from the spirit and scope of this disclosure.
What is claimed:
'1. A polished rod protector for use with an oil well pumping system having a polished rod reciprocated through a stuifing box, said stufiing box positioned a distance above the surface of the earth comprising:
a hollow bonnet member supported to said stufiing box, said bonnet member having an opening in the top and bottom surfaces thereof to receive said polished rod, said bonnet member having an exhaust opening therein; and
a bellows member aflixed at its lower end to said bonnet member at said upper opening in said bonnet member, said bellows member receiving said polished rod therein, said bellows member affixed at its upper end to said polished rod.
2. A polished rod protector according to claim 1 including a blow deflector positioned in said bonnet, said blow deflector comprising:
a gasket member having an opening therein receiving said polished rod; and
bracket means extending from the interior of said bonnet member supporting said gasket member intermediate the interior top and bottom of said bonnet member.
3. A polished rod protector according to claim 1 including means of detaohably supporting said bonnet member to said stufiing box, said means comprising:
a multiplicity of bracket members aflixed to and extending from said bonnet member, each of said bracket members having a notch opening therein; and
chain means received by said notch openings of said bracket members extending below portions of said stufiing box.
4. A polished rod protector according to claim 1 including a conduit means communicating with said exha-ust opening in said bonnet member, said conduit means terminating adjacent the surface of the earth.
5. A blow deflector for use with an oil well pumping system having a polished rod reciprocated through a stufiin-g box positioned a distance above the surface of the earth comprising:
a hollow bonnet member sealably supported on said stufling box, said bonnet member having an opening in the bottom thereof communicating the interior of said bonnet member with the interior of said stufling box, the bottom opening receiving said polished rod, and an opening in the top thereof;
a gasket member sealably supported in said top opening of said bonnet member, said gasket member having an opening therein reciprocably receiving said polished rod, the bonnet member having an exhaust opening therein;
a multiplicity of bracket members afiixed to and extending from said bonnet member, each of said bracket members having a notch opening therein; and
chain means received by said notch openings of said bracket member extending below portions of said stufiing box for detachably supporting said bonnet member to said stuffing box.
References Cited by the Examiner UNITED STATES PATENTS 913,286 2/ 1909 Heeter 166- 84 958,862 5/1910 Durham 741'8.2 1,418,612 6/1922 Beard 16681 1,507,628 9/1924 Schuyler 16684 2,050,702 8/1936 Jackson 7418.2 X 2,149,040 2/1939 Binder et al 74--18.2 X 2,214,428 9/1940 Miller 166-81 2,634,812 4/1953 Al-lemang 1668'1 2,673,615 3/1954 Humason 166-84 X 2,674,474 4/ 1954 Lister 166-84 3,019,663 2/1962 Breunich 74-18.2 3,041,885 7/1962 Christiansen 7418.2 3,045,606 7/ 1962 Schmidt 74-18.2 X 3,064,984 1-1/1962 Mickle et a1 277----178 3,109,662 11/1963 Bergstrorn 277178 CHARLES E. OCONNELL, Primary Examiner.
C. D. JOHNSON, D. H. BROWN, Assistant Examiners.
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|U.S. Classification||166/84.1, 277/322, 166/81.1, 277/636, 74/18.2, 277/585|
|International Classification||E21B33/08, E21B33/02|