Patent US3586464A successfully refreshed from Google Patents.
US3586464A
Expired / Lapsed
US
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Sucker rod compensator for subsurface well pumps
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1969-12-09
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Granted: 1971-06-22
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Expires: 1989-12-09
Abstract
Abstract A compensator located in a sucker rod string adjacent to a deep well pump and embodying upper and lower telescopically arranged devices, one of said devices being a piston mechanism, the other of the devices being a cylinder mechanism in which the piston mechanism is telescopically arranged. A liquid supply trapped in the cylinder mechanism and originating from the well bore fluid transmits linear motion between the piston and cylinder mechanisms, the liquid being forced in small increments past the piston mechanism out of the cylinder mechanism of each upward stroke of the sucker rod string and compensator, allowing the upper device to shift in step-by-step fashion progressively relatively upwardly of the lower device to increase the overall length of the compensator, until the travelling valve of the pump taps against the standing valve of the pump. When this occurs, the upper device overrides or moves slightly downward of the lower device, causing fluid in the well bore to flow into the cylinder mechanism through a check valve in the piston mechanism to incrementally replenish the liquid supply trapped in the cylinder mechanism.
Inventors
- 👤 Talmadge L Crowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:27
CPC Classifications
F; F04; F04B; F04B47/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
104 words
In a compensator for varying the effective length of a rod string in a well bore: an outer cylinder device; an inner piston device in said cylinder device and shiftable longitudinally with respect thereto; said cylinder device and piston device providing a chamber therebetween adapted to contain a liquid for transmitting longitudinal motion between said devices; a portion of one of said devices to one side of said chamber being communicable with the well bore; and means for allowing escape of a portion of the liquid from the chamber into the well bore to produce an increase in the overall length of said devices.
Claim 2
Dependent Claim
104 words
In a compensator for varying the effective length of a rod string in a well bore: an outer cylinder device; an inner piston device in said cylinder device and shiftable longitudinally with respect thereto; said cylinder device and piston device providing a chamber therebetween adapted to contain a liquid for transmitting longitudinal motion between said devices; a portion of one of said devices to one side of said chamber being communicable with the well bore; and means for allowing escape of a portion of the liquid from the chamber into the well bore to produce an increase in the overall length of said devices.
Claim 3
Dependent Claim
32 words
In a compensator as defined in claim 1; and means for returning liquid from the well bore to said chamber in response to longitudinal movement of the compensator in the well bore.
Claim 4
Dependent Claim
63 words
In a compensator as defined in claim 1; and means for returning liquid from the well bore to said chamber in response to longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
Claim 5
Dependent Claim
37 words
In a compensator as defined in claim 1; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between the exterior of said piston device and cylinder device.
Claim 6
Dependent Claim
72 words
In a compensator as defined in claim 1; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between the exterior of said piston and cylinder sleeve.
Claim 7
Dependent Claim
73 words
In a compensator as defined in claim 1; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between the exterior of said piston rod and cylinder head.
Claim 8
Dependent Claim
87 words
In a compensator as defined in claim 1; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between the exterior of said piston and cylinder sleeve and a leakage path defined between the exterior of said piston rod and cylinder head.
Claim 9
Dependent Claim
128 words
In a compensator as defined in claim 1; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between the exterior of said piston and cylinder sleeve; and means for returning liquid from the well bore to said chamber in response to the longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
Claim 10
Dependent Claim
129 words
In a compensator as defined in claim 1; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between the eXterior of said piston rod and cylinder head; and means for returning liquid from the well bore to said chamber in response to the longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
Claim 11
Dependent Claim
143 words
In a compensator as defined in claim 1; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between the exterior of said piston and cylinder sleeve and a leakage path defined between the exterior of said piston rod and cylinder head; and means for returning liquid from the well bore to said chamber in response to the longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
Claim 12
Dependent Claim
228 words
In apparatus wherein a pump is disposed in a well bore, said pump including a standing valve mechanism and a travelling valve mechanism thereabove reciprocable by a string of sucker rods for elevating the well production to the top of the well bore, the combination therewith of a compensator in the sucker rod string comprising an upper device connected to an adjacent sucker rod member and a lower device connected to the travelling valve mechanism; one of said devices being an outer cylinder device; the other of said devices being a piston device in said cylinder device and shiftable longitudinally with respect to said cylinder device; said cylinder device and piston device providing a chamber therebetween adapted to contain a liquid for transmitting longitudinal motion between said piston device and cylinder device to effect reciprocation of said travelling valve mechanism toward and from said standing valve mechanism; a portion of one of said cylinder device and piston device to one side of said chamber being communicable with the well bore; and means for allowing escape of a portion of the liquid from the chamber into the well bore to effect relative shifting of said upper device upwardly along said lower device to increase the overall length of said upper and lower devices and bring the travelling valve mechanism to a bottom position closer to said standing valve mechanism.
Claim 13
Dependent Claim
228 words
In apparatus wherein a pump is disposed in a well bore, said pump including a standing valve mechanism and a travelling valve mechanism thereabove reciprocable by a string of sucker rods for elevating the well production to the top of the well bore, the combination therewith of a compensator in the sucker rod string comprising an upper device connected to an adjacent sucker rod member and a lower device connected to the travelling valve mechanism; one of said devices being an outer cylinder device; the other of said devices being a piston device in said cylinder device and shiftable longitudinally with respect to said cylinder device; said cylinder device and piston device providing a chamber therebetween adapted to contain a liquid for transmitting longitudinal motion between said piston device and cylinder device to effect reciprocation of said travelling valve mechanism toward and from said standing valve mechanism; a portion of one of said cylinder device and piston device to one side of said chamber being communicable with the well bore; and means for allowing escape of a portion of the liquid from the chamber into the well bore to effect relative shifting of said upper device upwardly along said lower device to increase the overall length of said upper and lower devices and bring the travelling valve mechanism to a bottom position closer to said standing valve mechanism.
Claim 14
Dependent Claim
31 words
In apparatus as defined in claim 11; and means for returning liquid from the well bore to said chamber in response to longitudinal movement of the compensator in the well bore.
Claim 15
Dependent Claim
62 words
In apparatus as defined in claim 11; and means for returning liquid from the well bore to said chamber in response to longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
Claim 16
Dependent Claim
33 words
In apparatus as defined in claim 11; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between said piston device and cylinder device.
Claim 17
Dependent Claim
68 words
In apparatus as defined in claim 11; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between said piston and cylinder sleeve.
Claim 18
Dependent Claim
82 words
In apparatus as defined in claim 11; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable along said sleeve and a piston rod connected to said piston and slidabLe in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between said piston rod and cylinder head.
Claim 19
Dependent Claim
80 words
In apparatus as defined in claim 11; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between said piston and cylinder sleeve and a leakage path defined between said piston rod and cylinder head.
Claim 20
Dependent Claim
124 words
In apparatus as defined in claim 11; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between said piston and cylinder sleeve; and means for returning liquid from the well bore to said chamber in response to the longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
Claim 21
Dependent Claim
138 words
In apparatus as defined in claim 11; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between said piston rod and cylinder head; and means for returning liquid from the well bore to said chamber in response to the longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
Claim 22
Dependent Claim
136 words
In apparatus as defined in claim 11; said cylinder device including a cylinder head and a cylinder sleeve; said piston device including a piston slidable along said sleeve and a piston rod connected to said piston and slidable in and along said head; said means for allowing escape of a portion of the liquid from the chamber comprising a leakage path defined between said piston and cylinder sleeve and a leakage path defined between said piston rod and cylinder head; and means for returning liquid from the well bore to said chamber in response to the longitudinal movement of the compensator in the well bore comprising a check valve in said piston device permitting liquid to flow from the well bore to said chamber, but preventing flow of liquid from said chamber to the well bore.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |