Patent US3880249A successfully refreshed from Google Patents.
US3880249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jar for well strings
Assignee: Individual
•
Filing: 1974-03-12
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Granted: 1975-04-29
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Expires: 1994-03-12
Abstract
Abstract A jar for a well string includes an outer housing having means whereby the housing may be connected with one portion of a well string with a mandrel telescopically fitting in the housing and having means for connection with another part of the well string. Means connect the mandrel and housing together for relative longitudinal movement therebetween while inhibiting relative rotation therebetween. First and second one-way acting coupling means are mounted in spaced relation in the housing and coupling engaging means are mounted on the mandrel so that the coupling enaging means on the mandrel is movable into engagement with either of said one-way acting coupling means upon longitudinal movement of the mandrel relative to the housing. Shoulder means on the housing and mandrel are provided so that when the mandrel is moved longitudinally relative to said housing in one direction it engages the coupling engaging means thereon with one of the one-way acting coupling means. A predetermined force may then be exerted on the mandrel to move the coupling engaging means through the one-way acting coupling means, and when the coupling engaging means is thus disengaged from the oneway acting coupling means the shoulder means on the housing and mandrel strike to deliver a jar or impact to the well string. When the mandrel is moved in the opposite direction in the housing to engage the coupling engaging means thereon with a second one-way acting coupling means and a force exerted on the mandrel in a predetermined amount to move the coupling engaging means through the one-way coupling means, the shoulder means on the mandrel and housing again strike and deliver a jar or impact to the well string in the opposite direction. The coupling engaging means, after engagement with either of said one-way acting coupling means, is disengageable from either of said one-way acting coupling means upon longitudinal movement of the mandrel relative to the housing in a direction opposite to that which engages the coupling engaging means with either of said one-way acting coupling means. The foregoing is accomplished without imparting a jar or impact to the well string and enable the mandrel and well string portion connected therewith to be moved freely longitudinally relative to the housing and well string portion connected therewith.
Inventors
- 👤 Edwin A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:51
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/107
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
299 words
A jar for a well string including: a. an outer housing; b. a mandrel extending longitudinally within said housing; c. means connecting said mandrel and housing for relative longitudinal movement therebetween while inhibiting relative rotation therebetween; d. first and second one-way acting coupling means mounted in spaced relation in said housing; e. coupling engaging means on said mandrel, said coupling engaging means movable into engagement with either of said one-way acting coupling means upon longitudinal movement of said mandrel relative to said housing and disengageable from either of said one-way acting coupling means upon longitudinal movement of said mandrel relative to said housing in a direction opposite to that which engaged said coupling engaging means with either of said one-way acting coupling means on said housing; f. shoulder means on said housing and mandrel; g. said coupling engaging means and said first one-way acting coupling means cooperating when said mandrel is moved longitudinally relative to said housing in one direction to engage and thereafter releasable when a predetermined force is exerted on said mandrel in said one direction to effect disconnection of said coupling engaging means and first one-way acting coupling means to cause said shoulder means on said housing and mandrel to strike and deliver a jar to the well string in said one direction; and h. said coupling engaging means and said second one-way acting coupling means cooperating when said mandrel is moved longitudinally relative to said housing in another direction to engage and thereafter releasable when a predetermined force is exerted on said mandrel in said other direction to effect disconnection of said coupling engaging means and second one-way acting coupling means to cause said shoulder means on said housing and mandrel to strike and deliver a jar to the well string in said other direction.
Claim 2
Dependent Claim
299 words
A jar for a well string including: a. an outer housing; b. a mandrel extending longitudinally within said housing; c. means connecting said mandrel and housing for relative longitudinal movement therebetween while inhibiting relative rotation therebetween; d. first and second one-way acting coupling means mounted in spaced relation in said housing; e. coupling engaging means on said mandrel, said coupling engaging means movable into engagement with either of said one-way acting coupling means upon longitudinal movement of said mandrel relative to said housing and disengageable from either of said one-way acting coupling means upon longitudinal movement of said mandrel relative to said housing in a direction opposite to that which engaged said coupling engaging means with either of said one-way acting coupling means on said housing; f. shoulder means on said housing and mandrel; g. said coupling engaging means and said first one-way acting coupling means cooperating when said mandrel is moved longitudinally relative to said housing in one direction to engage and thereafter releasable when a predetermined force is exerted on said mandrel in said one direction to effect disconnection of said coupling engaging means and first one-way acting coupling means to cause said shoulder means on said housing and mandrel to strike and deliver a jar to the well string in said one direction; and h. said coupling engaging means and said second one-way acting coupling means cooperating when said mandrel is moved longitudinally relative to said housing in another direction to engage and thereafter releasable when a predetermined force is exerted on said mandrel in said other direction to effect disconnection of said coupling engaging means and second one-way acting coupling means to cause said shoulder means on said housing and mandrel to strike and deliver a jar to the well string in said other direction.
Claim 3
Dependent Claim
33 words
The invention of claim 1 wherein said connecting means between said mandrel and housing includes a plurality of longitudinally extending recesses on said housing and projections on said mandrel fitting in said recesses.
Claim 4
Dependent Claim
43 words
The invention of claim 1 including spaced seal means between said mandrel and housing to seal off the interior of said housing from the exterior wIthout changing the volume between said seal means as said mandrel is moved longitudinally relative to said housing.
Claim 5
Dependent Claim
33 words
The invention of claim 3 wherein said connecting means between said mandrel and housing includes a plurality of longitudinally extending recesses on said housing and projections on said mandrel fitting in said recesses.
Claim 6
Dependent Claim
20 words
The invention of claim 1 including means on said mandrel and housing for connecting the jar in a well string.
Claim 7
Dependent Claim
43 words
The invention of claim 5 including spaced seal means between said mandrel and housing to seal off the interior of said housing from the exterior without changing the volume between said seal means as said mandrel is moved longitudinally relative to said housing.
Claim 8
Dependent Claim
33 words
The invention of claim 5 wherein said connecting means between said mandrel and housing includes a plurality of longitudinally extending recesses on said housing and projections on said mandrel fitting in said recesses.
Claim 9
Dependent Claim
31 words
The invention of claim 1 including means to equalize the pressure existing on the outside of said outer housing with the pressure in the jar between said outer housing and mandrel.
Claim 10
Dependent Claim
42 words
The invention of claim 8 wherein said means to equalize includes piston means sealably engaging said outer housing and surrounding said mandrel, said outer housing having port means therein for communicating pressure exteriorly of said housing to act on said piston means.
Claim 11
Dependent Claim
80 words
The invention of claim 9 wherein said piston means includes one portion surrounding said mandrel, said one portion having seal means thereon to sealably engage within said outer housing, and skirt means extending from said first portion and surrounding said mandrel, said skirt portion and outer housing having seal means therebetween and wherein the port means in said outer housing is between said seal means on said one portion and the seal means between said skirt portion and outer housing.
Claim 12
Dependent Claim
39 words
The invention of claim 1 wherein said first and second coupling means each include: a. bowl means; b. slip means carried by said bowl means; and c. said slip means having surfaces thereon for engaging said coupling engaging means.
Claim 13
Dependent Claim
20 words
The invention of claim 11 including means on said mandrel and housing for connecting the jar in a well string.
Claim 14
Dependent Claim
43 words
The invention of claim 11 including spaced seal means between said mandrel and housing to seal off the interior of said housing from the exterior without changing the volume between said seal means as said mandrel is moved longitudinally relative to said housing.
Claim 15
Dependent Claim
33 words
The invention of claim 11 wherein said connecting means between said mandrel and housing includes a plurality of longitudinally extending recesses on said housing and projections on said mandrel fitting in said recesses.
Claim 16
Dependent Claim
32 words
The invention of claim 11 including adjustable means carried by said housing to set the force necessary to be exerted on said mandrel to effect a jar in either of said directions.
Claim 17
Dependent Claim
20 words
The invention for claim 15 including means on said mandrel and housing for connecting the jar in a well string.
Claim 18
Dependent Claim
43 words
The invention of claim 15 including spaced seal means between said mandrel and housing to seal off the interior of said housing from the exterior without changing the volume between said seal means as said mandrel is moved longitudinally relative to said housing.
Claim 19
Dependent Claim
33 words
The invention of claim 15 wherein said connecting means between said mandrel and housing includes a plurality of longitudinally extending recesses on said housing and projections on said mandrel fitting in said recesses.
Claim 20
Dependent Claim
27 words
The invention of claim 11 including adjustment means engaging said slip means whereby the grip of said slip means on said coupling engaging means may be varied.
Claim 21
Dependent Claim
20 words
The invention of claim 19 including means on said mandrel and housing for connecting the jar in a well string.
Claim 22
Dependent Claim
43 words
The invention of claim 19 including spaced seal means between said mandrel and housing to seal off the interior of said housing from the exterioR without changing the volume between said seal means as said mandrel is moved longitudinally relative to said housing.
Claim 23
Dependent Claim
33 words
The invention of claim 19 wherein said connecting means between said mandrel and housing includes a plurality of longitudinally extending recesses on said housing and projections on said mandrel fitting in said recesses.
Claim 24
Dependent Claim
26 words
The invention of claim 11 including surface means on said slip means to enable said slip means to yield when said coupling engaging means moves therethrough.
Claim 25
Dependent Claim
25 words
The invention of claim 23 wherein said surface means includes a plurality of recesses on the surface of said slip means adjacent said bowl means.
Claim 26
Dependent Claim
32 words
The invention of claim 23 including adjustable means carried by said housing to set the force necessary to be exerted on said mandrel to effect a jar in either of said directions.
Claim 27
Dependent Claim
27 words
The invention of claim 23 including adjustment means engaging said slip means whereby the grip of said slip means on said coupling engaging means may be varied.
Claim 28
Dependent Claim
20 words
The invention of claim 23 including means on said mandrel and housing for connecting the jar in a well string.
Claim 29
Dependent Claim
43 words
The invention of claim 23 including spaced seal means between said mandrel and housing to seal off the interior of said housing from the exterior without changing the volume between said seal means as said mandrel is moved longitudinally relative to said housing.
Claim 30
Dependent Claim
33 words
The invention of claim 23 wherein said connecting means between said mandrel and housing includes a plurality of longitudinally extending recesses on said housing and projections on said mandrel fitting in said recesses.
Claim 31
Dependent Claim
65 words
A jar for a well string including: a. a housing; b. a mandrel movable longitudinally in said housing; and c. means on said mandrel and spaced cooperating means on said housing engageable upon nonrotational movement of said mandrel relative to said housing for selectively moving said mandrel relative to said housing and for selectively delivering an upward or a downward impact to the well string.
Claim 32
Dependent Claim
65 words
A jar for a well string including: a. a housing; b. a mandrel movable longitudinally in said housing; and c. means on said mandrel and spaced cooperating means on said housing engageable upon nonrotational movement of said mandrel relative to said housing for selectively moving said mandrel relative to said housing and for selectively delivering an upward or a downward impact to the well string.
Claim 33
Dependent Claim
28 words
The invention of claim 30 including adjustable means adjacent each of said spaced cooperating means to preset the amount of upward and downward impact independently of each other.
Claim 34
Dependent Claim
32 words
The invention of claim 30 wherein said spaced cooperating means on said housing is constructed and arranged to be selectively disengaged without delivering an upward or downward impact to the well string.
Claim 35
Dependent Claim
39 words
The invention of claim 30 wherein said spaced cooperating means on said housing is constructed and arranged to accommodate relative longitudinal movement between said mandrel and housing without imparting either an upward or downward impact to the well string.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |