US3800871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing anchors
Assignee: Individual
•
Filing: 1972-05-04
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Granted: 1974-04-02
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Expires: 1992-05-04
Abstract
Abstract A tubing anchor apparatus used in conjunction with downhole pump systems for securing production tubing to a well casing. The tubing anchor is provided with a longitudinally extending cutout formed between two movable gripping elements which cooperate with the inside peripheral wall surface of the casing to form an unobstructed tunnel therethrough so as to permit a probe to be run downhole through the tunnel thereby enabling the formation underlying the anchor to be logged. Guide means provided on the upper extremity of the anchor enables the probe to be guided into the tunnel entrance.
Inventors
- 👤 B Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:51
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/01; E21B23/04; E21B23/0411; E21B23/0419; E21B23/042; E21B43/00; E21B43/02; E21B43/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
244 words
A tubing anchor apparatus for anchoring the tubing of a downhole pump system within a borehole comprising: an elongated main body including means by which said body can be connected into a tubing string, said body having means forming radially spaced apart outwardly directed gripping elements thereon, means mounting one gripping element for movement in a radially outward direction relative to said main body; means forming a longitudinally extending unobstructed passageway through an outer marginal portion of said main body which forms a continuous U-shaped passageway along the entire length of the anchor apparatus so as to enable a probe to be lowered through said passageway on a wire line; means forcing said one gripping element in an outward direction so as to cause each gripping element to engage the inside peripheral wall surface of the borehole; said means by which said body can be connected into a tubing string includes a sub connected to the upper terminal end thereof; said sub having a diameter smaller than said main body so as to form a shoulder therebetween; said shoulder being downwardly sloped towards said passageway so that a probe lowered into contact with said shoulder will be guided in a downward direction into said passageway; the axial center line of said sub being eccentrically arranged relative to the axial centerline of said main body, said one movable gripping element being disposed within a portion of said main body which is opposed to said sub.
Claim 2
Dependent Claim
244 words
A tubing anchor apparatus for anchoring the tubing of a downhole pump system within a borehole comprising: an elongated main body including means by which said body can be connected into a tubing string, said body having means forming radially spaced apart outwardly directed gripping elements thereon, means mounting one gripping element for movement in a radially outward direction relative to said main body; means forming a longitudinally extending unobstructed passageway through an outer marginal portion of said main body which forms a continuous U-shaped passageway along the entire length of the anchor apparatus so as to enable a probe to be lowered through said passageway on a wire line; means forcing said one gripping element in an outward direction so as to cause each gripping element to engage the inside peripheral wall surface of the borehole; said means by which said body can be connected into a tubing string includes a sub connected to the upper terminal end thereof; said sub having a diameter smaller than said main body so as to form a shoulder therebetween; said shoulder being downwardly sloped towards said passageway so that a probe lowered into contact with said shoulder will be guided in a downward direction into said passageway; the axial center line of said sub being eccentrically arranged relative to the axial centerline of said main body, said one movable gripping element being disposed within a portion of said main body which is opposed to said sub.
Claim 3
Dependent Claim
45 words
The apparatus of claim 1 wherein there is included three said gripping elements, one said gripping element being fixed relative to said main body; two said gripping elements being movable relative to said main body; said passageway being located between said two said gripping elements.
Claim 4
Dependent Claim
90 words
The apparatus of claim 2 wherein said main body includes means forming a flow passageway therethrough, said means for forcing said one gripping element includes a cylinder formed within said main body, a piston reciprocatingly received within said cylinder and forming a chamber therewith, means forming a port for enabling fluid to flow from said flow passageway into said chamber; and means connecting said piston to said one gripping element so that reciprocating movement of said piston forces said one gripping element to move radially relative to said main body.
Claim 5
Dependent Claim
98 words
The apparatus of claim 1 wherein said main body includes a cylinder, a piston reciprocatingly received within said cylinder and forming a cylinder chamber therewith, a source of pressure flow connected to said chamber, means connecting said piston to said one movable element, means slidably mounting said one movable element so that when sufficient pressure is effected in said chamber, said piston strokes and moves said one movable element radially outward into engagement with the inside wall of the boRehole; and means forming a flow path for produced fluid to flow through said body and into said sub.
Claim 6
Dependent Claim
196 words
Method of logging a borehole underlying a downhole pump wherein the pump is connected to a tubing string with the tubing string being affixed to the borehole wall by a tubing anchor in set positon, comprising the steps of: 1 forming an unobstructed longitudinally extending U-shaped cut-out within the tubing anchor; 2 forming the upper portion of the tubing anchor into a guide means so that a probe when lowered into the borehole, will be guided into the passageway; 3 arranging a flow path through the tubing anchor which has an axial axis which is placed eccentric with respect to the tubing anchor; 4 placing the cut-out of step (1) in the portion of the tubing anchor which is opposed to the flow path of step (3); 5 attaching the tubing anchor to the wall of the borehole so that a longitudinally extending passageway is jointly formed by the inside wall of the borehole and the U-shaped cutout; 6 running a logging probe downhole into the borehole on the end of a wire line; 7 lowering the probe through the passageway of step (5) so as to enable the borehole underlying the anchor to be logged.
Claim 7
Dependent Claim
196 words
Method of logging a borehole underlying a downhole pump wherein the pump is connected to a tubing string with the tubing string being affixed to the borehole wall by a tubing anchor in set positon, comprising the steps of: 1 forming an unobstructed longitudinally extending U-shaped cut-out within the tubing anchor; 2 forming the upper portion of the tubing anchor into a guide means so that a probe when lowered into the borehole, will be guided into the passageway; 3 arranging a flow path through the tubing anchor which has an axial axis which is placed eccentric with respect to the tubing anchor; 4 placing the cut-out of step (1) in the portion of the tubing anchor which is opposed to the flow path of step (3); 5 attaching the tubing anchor to the wall of the borehole so that a longitudinally extending passageway is jointly formed by the inside wall of the borehole and the U-shaped cutout; 6 running a logging probe downhole into the borehole on the end of a wire line; 7 lowering the probe through the passageway of step (5) so as to enable the borehole underlying the anchor to be logged.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |