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Any discrepancies in the text and image of the Claims and Abstract are due to differing posting times. Text of the Claims and Abstract are posted:
(12) Patent Application: | (11) CA 2803208 |
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(54) English Title: | DOWNHOLE PUMP WITH A PRESSURE SEQUENCING VALVE |
(54) French Title: | POMPE DE FOND DE TROU MUNIE D'UNE SOUPAPE DE SEQUENCE |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | NATHAN V. WOODRUFFWOODRUFF, NATHAN V. |
(74) Associate agent: | |
(45) Issued: | |
(86) PCT Filing Date: | 2011-07-25 |
(87) Open to Public Inspection: | 2012-02-02 |
Examination requested: | 2013-07-16 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | Yes |
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(86) PCT Filing Number: | 2803208/ |
(87) International Publication Number: | CA2011050453 |
(85) National Entry: | 2012-12-19 |
(30) Application Priority Data: | ||||||
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A downhole pump has a master piston having a first side and a second side in a first piston chamber. The first piston chamber has a first inlet and a second inlet for alternatingly applying fluid pressure to the first side of the master piston to move the piston toward the top of a piston stroke, and to the second side of the master piston to move the piston toward the bottom of the piston stroke. A valve is carried by the master piston that relieves fluid pressure from the respective side of the master piston once the top or bottom of the stroke is reached. There is a sequencing valve with a first state that applies fluid pressure to the first inlet and a second state that applies fluid pressure to the second inlet. The sequencing valve switches between the first state and the second state once a drop in pressure occurs. A slave piston is driven by the master piston in a second piston chamber. The second piston chamber has at least one fluid inlet and at least one fluid outlet.
L'invention concerne une pompe de fond de trou présentant un piston principal qui comporte un premier côté et un second côté dans une première chambre de piston. La première chambre de piston présente une première admission et une seconde admission permettant d'appliquer alternativement une pression de fluide sur le premier côté du piston principal de manière à déplacer le piston vers l'extrémité supérieure d'une course du piston, et sur le second côté du piston principal de manière à déplacer le piston vers l'extrémité inférieure de la course du piston. Le piston principal présente une soupape qui limite la pression en évacuant du fluide depuis le côté respectif du piston principal une fois que le haut ou le bas de la course a été atteint. Une soupape de séquence applique, dans un premier état, une pression de fluide sur la première admission et, dans un second état, une pression de fluide sur la seconde admission, la soupape de séquence passant d'un état à l'autre en cas de chute de pression. Un piston secondaire est entraîné par le piston principal dans une seconde chambre de piston. La seconde chambre de piston présente au moins une admission de fluide et au moins une sortie de fluide.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
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Description | Date |
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Application Not Reinstated by Deadline | 2016-01-22 |
Inactive: Dead - No reply to s.30(2) Rules requisition | 2016-01-22 |
Inactive: Abandoned - No reply to s.30(2) Rules requisition | 2015-01-22 |
Inactive: S.30(2) Rules - Examiner requisition | 2014-07-22 |
Inactive: Report - No QC | 2014-07-04 |
Letter Sent | 2013-07-22 |
Request for Examination Received | 2013-07-16 |
All Requirements for Examination Determined Compliant | 2013-07-16 |
Request for Examination Requirements Determined Compliant | 2013-07-16 |
Inactive: Cover page published | 2013-02-14 |
Inactive: IPC assigned | 2013-02-06 |
Inactive: First IPC assigned | 2013-02-06 |
Application Received - PCT | 2013-02-06 |
Inactive: Notice - National entry - No RFE | 2013-02-06 |
Inactive: IPC assigned | 2013-02-06 |
National Entry Requirements Determined Compliant | 2012-12-19 |
Small Entity Declaration Determined Compliant | 2012-12-19 |
Application Published (Open to Public Inspection) | 2012-02-02 |
There is no abandonment history.
The last payment was received on 2015-07-24
Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO
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web page to see all current fee amounts.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Basic national fee - small | 2012-12-19 | ||
Request for exam. (CIPO ISR) – small | 2013-07-16 | ||
MF (application, 2nd anniv.) - small | 02 | 2013-07-25 | 2013-07-16 |
MF (application, 3rd anniv.) - small | 03 | 2014-07-25 | 2014-07-08 |
MF (application, 4th anniv.) - small | 04 | 2015-07-27 | 2015-07-24 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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CLAYTON HOFFARTH |
Past Owners on Record |
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None |