US2153816A - Sucker rod jerk absorber - Google Patents
Sucker rod jerk absorber Download PDFInfo
- Publication number
- US2153816A US2153816A US177340A US17734037A US2153816A US 2153816 A US2153816 A US 2153816A US 177340 A US177340 A US 177340A US 17734037 A US17734037 A US 17734037A US 2153816 A US2153816 A US 2153816A
- Authority
- US
- United States
- Prior art keywords
- rod
- sucker rod
- piston
- barrel
- jerk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000036461 convulsion Effects 0.000 title description 5
- 239000006096 absorbing agent Substances 0.000 title description 4
- 239000012530 fluid Substances 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
- E21B17/073—Telescoping joints for varying drill string lengths; Shock absorbers with axial rotation
Definitions
- a device which is designed for interposition between two sections of a sucker rod for the purpose of relieving the rod of undue vibration, torsional strain, twist and jerk;
- Figure 1 is a longitudinal sectional view through the device with certain parts shown in elevation
- Figure 2 is a transverse sectional view taken substantially on the line 2-2 of Figure 1, and
- Figure 3 is a perspective View of a piston.
- the absorber comprisesran elongated cylinder or barrel 5 into the upper end of which is threaded a cylindrical plug 6, and into the lower end of which is threaded a cylindrical plug or coupling element 'I.
- the plug or element 'I is provided in the free end thereof with a threaded socket 8 for receiving the threaded end of a sucker rod section.
- the plug 6 is longitudinally bored and is also suitably formed to provide a packing box 9 in which is seated a suitable packing Il) and a gland II, packing Il) and gland II accommodating a piston rod I2 as shown.
- the rod I2 at one end thereof is suitably provided in a manner (not shown) to attach said' end of the rod to one end of a second sucker rod section whereby the absorber may be interposed between the said sections of the sucker rod.
- a cylindrical air chamber I6 formed of metal or other suitable material of hollow shell-like form and provided in its lower end with a circular series of air ports I'I.
- a suitable hydraulic fluid, I8, such as oil or the like is within the barrel 5 .
- piston I3 ls suitably secured on the inner end of the rod I2 through the medium of a conical wedge I9 which fits snugly within a conical bore 20 provided therefor in the piston I3, and at the base of the cone the wedge I9 abuts a shoulder 2l provided on the rod I2 as shown.
- the pumping action causes an upward pull on the piston rod I2 which, through piston I3, exerts pressure on the hydraulic fluid I 8. '1211s in turn results in pressure being exerted. on the air chamber I6 through the ports I'I so that the upward movement of the rod I2 is transmitted to the lower section of the sucker rod for causing the latter to move upwardly with the rod string.
- a cushion eifect is obtained with the result that no jerk or snap is imparted to the sucker rod string during the pumping operation.
- a cushioning device for a sucker rod string comprising a barrel containing fluid, a coupling member closing the lower end of the barrel, a plug closing the upper end of the barrel, a piston rod passing through the plug, packing means in the plug through which the rod passes, a piston in the barrel connected with the lower end of the rod, an air chamber in the upper part of the barrel below the plug including a cylinder having a working fit with the barrel, a tubular member in the cylinder and having a working fit on the rod, and end pieces connected with the tu bular member and the cylinder and forming an air chamber between the tubular member and the cylinder, the lower end piece having perforations therein for adjoining the interior of the air chamber with the interior of the barrel.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
B. H. STEVENS SUCKER ROD JERK ABSORBER Inventor Filed Nov. 30, 1937 Attorneys April 11, 1939.
Patented Apr. 11, 1939 UNITED STATES PATENT oFFlcE 1 Claim.
jerk to which the sucker rod is subjected during the well-pumping motion or operation.
In accordance with the present invention, a device is provided which is designed for interposition between two sections of a sucker rod for the purpose of relieving the rod of undue vibration, torsional strain, twist and jerk; and the invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawing wherein:
Figure 1 is a longitudinal sectional view through the device with certain parts shown in elevation,
Figure 2 is a transverse sectional view taken substantially on the line 2-2 of Figure 1, and
Figure 3 is a perspective View of a piston.
Referring to the drawing by reference numerals it will be seen that the absorber comprisesran elongated cylinder or barrel 5 into the upper end of which is threaded a cylindrical plug 6, and into the lower end of which is threaded a cylindrical plug or coupling element 'I.
The plug or element 'I is provided in the free end thereof with a threaded socket 8 for receiving the threaded end of a sucker rod section.
The plug 6 is longitudinally bored and is also suitably formed to provide a packing box 9 in which is seated a suitable packing Il) and a gland II, packing Il) and gland II accommodating a piston rod I2 as shown.
The rod I2 at one end thereof is suitably provided in a manner (not shown) to attach said' end of the rod to one end of a second sucker rod section whereby the absorber may be interposed between the said sections of the sucker rod.
On the inner end of the piston rod I2 there is provided an elongated piston I3, one end of which bears against a washer I 4 held on the rod I2 between the lower end of the piston I3 and a nut I5 threaded on the lower or inner end of the rod I2 as shown in Figure 1.
Fitting snugly within the barrel 5 above the piston I3 is a cylindrical air chamber I6 formed of metal or other suitable material of hollow shell-like form and provided in its lower end with a circular series of air ports I'I.
Between the chamber I6 and the piston I3 there is within the barrel 5 a suitable hydraulic fluid, I8, such as oil or the like.
Further the piston I3 ls suitably secured on the inner end of the rod I2 through the medium of a conical wedge I9 which fits snugly within a conical bore 20 provided therefor in the piston I3, and at the base of the cone the wedge I9 abuts a shoulder 2l provided on the rod I2 as shown.
The operation, utility and advantages of a device of this character will be apparent from the following:
The pumping action causes an upward pull on the piston rod I2 which, through piston I3, exerts pressure on the hydraulic fluid I 8. '1211s in turn results in pressure being exerted. on the air chamber I6 through the ports I'I so that the upward movement of the rod I2 is transmitted to the lower section of the sucker rod for causing the latter to move upwardly with the rod string. Manifestly by providing the air chamber I5 and the fluid IB within the barrel 5 above the piston I3 a cushion eifect is obtained with the result that no jerk or snap is imparted to the sucker rod string during the pumping operation.
On the downstroke of the sucker rod string the pressure exerted on the air chamber I5 together with the partial vacuum created on the hydraulic fluid I8 by the downward motion of the piston rod I2 and piston I3 causes the parts to return to their normal position.
It will thus be seen that I have provided a device which may be readily inserted between two sections of a sucker rod string and which device if so used will serve to absorb the shock or jerk to which the rod sections are ordinarily subjected during the pumping operation.
It is thought that a clear understanding of the construction, utility and advantages of an invention of this character will be had Without a more detailed description.
Having thus describedthe invention what is claimed as new is:
A cushioning device for a sucker rod string comprising a barrel containing fluid, a coupling member closing the lower end of the barrel, a plug closing the upper end of the barrel, a piston rod passing through the plug, packing means in the plug through which the rod passes, a piston in the barrel connected with the lower end of the rod, an air chamber in the upper part of the barrel below the plug including a cylinder having a working fit with the barrel, a tubular member in the cylinder and having a working fit on the rod, and end pieces connected with the tu bular member and the cylinder and forming an air chamber between the tubular member and the cylinder, the lower end piece having perforations therein for adjoining the interior of the air chamber with the interior of the barrel.
BEN HARWOOD STEVENS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US177340A US2153816A (en) | 1937-11-30 | 1937-11-30 | Sucker rod jerk absorber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US177340A US2153816A (en) | 1937-11-30 | 1937-11-30 | Sucker rod jerk absorber |
Publications (1)
Publication Number | Publication Date |
---|---|
US2153816A true US2153816A (en) | 1939-04-11 |
Family
ID=22648228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US177340A Expired - Lifetime US2153816A (en) | 1937-11-30 | 1937-11-30 | Sucker rod jerk absorber |
Country Status (1)
Country | Link |
---|---|
US (1) | US2153816A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4571162A (en) * | 1982-07-28 | 1986-02-18 | Ira M. Patton | Oil well sucker rod shock absorber |
US4963078A (en) * | 1988-05-26 | 1990-10-16 | Agee John O | Stress and torque reducing tool and method |
-
1937
- 1937-11-30 US US177340A patent/US2153816A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4571162A (en) * | 1982-07-28 | 1986-02-18 | Ira M. Patton | Oil well sucker rod shock absorber |
US4963078A (en) * | 1988-05-26 | 1990-10-16 | Agee John O | Stress and torque reducing tool and method |
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