US3791449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping displacement joint
Assignee: Baker Hughes Holdings LLC
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Filing: 1971-10-13
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Granted: 1974-02-12
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Expires: 1991-10-13
Abstract
Abstract Method and apparatus for displacing drilling fluids from between axially spaced well packers in a multiple string well. A telescoping displacement joint may be attached at the lower end of the string which passes through both packers. The joint is initially in a retracted position leaving an annular space btween the joint and the lower packer. After a second string is run, circulating fluid is pumped down the first string, out of the joint, up through the annular space, into the area between packers and out the second string to displace drilling fluids accumulated between packers. Then pressure is applied to the joint, causing a seal carrying portion thereof to extend into sealing engagement with the lower packer. The joint comprises an inner tubular member telescopically engaging an outer tubular member and adapted for limited axial movement from a retracted to an extended position. The joint carries a first seal assembly between the inner and outer tubular members and a second seal assembly on the inner tubular member for sealing engagement with the lower packer.
Inventors
- 👤 C Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:30
CPC Classifications
E; E21; E21B; E21B37/00; E21B34/00; E21B34/06; E21B34/14; E21B34/142
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
133 words
A method of displacing drilling fluids from a multiple zone well having upper and lower packer means therein comprising the steps of: a. running and landing a first string of tubing in said well with displacement joint means on the lower end thereof for disposition between said upper and lower packer means, a portion of said displacement joint means extending Through a bore in said lower packer means leaving an annular passage therebetween; b. running and landing a second string of tubing in said well extending through said upper packer means into the space between said packer means; and c. circulating fluid through said first and second strings, said annular passage and said space between said packer means to remove drilling fluid accumulated between said packer means and below said lower packer means.
Claim 2
Independent Claim
133 words
A method of displacing drilling fluids from a multiple zone well having upper and lower packer means therein comprising the steps of: a. running and landing a first string of tubing in said well with displacement joint means on the lower end thereof for disposition between said upper and lower packer means, a portion of said displacement joint means extending Through a bore in said lower packer means leaving an annular passage therebetween; b. running and landing a second string of tubing in said well extending through said upper packer means into the space between said packer means; and c. circulating fluid through said first and second strings, said annular passage and said space between said packer means to remove drilling fluid accumulated between said packer means and below said lower packer means.
Claim 3
Dependent Claim
65 words
The method of claim 1 and the further steps of closing the end of said first string of tubing by pumping a closure member into said displacement joint and applying pressure to said displacement joint means through said first string of tubing to axially move at least a portion of said displacement joint means into sealing engagement with said bore through said lower packer means.
Claim 4
Dependent Claim
43 words
The method of claim 2 and the further step of opening the end of said first string of tubing for production of well fluids therethrough by increasing the pressure therein causing said closure member to exit said joint below said lower packer means.
Claim 5
Dependent Claim
20 words
The method of claim 1 in which both of said packer means are set prior to said circulating of fluid.
Claim 6
Dependent Claim
19 words
The method of claim 1 in which said lower packer means is set prior to said circulating of fluid.
Claim 7
Dependent Claim
160 words
An extensible joint for well pipe strings, comprising: a. an outer tubular means having means thereon for connecting said joint to an adjacent section of pipe string; b. inner tubular means telescopically engaging said outer tubular means for limited axial movement from a retracted position to an extended position relative to said outer tubular means; c. first seal means between said outer and inner tubular means carried by head means on the upper end of said inner tubular means, said head means having an upwardly facing annular surface area exposed to the pressure within said tubing string and a downwardly facing annular surface area exposed to the pressure within said tubing string and a downwardly facing annular surface area exposed to the pressure existing around said outer tubular means; d. second seal means carried by said inner tubular means for sealing engagement with an opening through apparatus in said well, when said inner tubular means is in said extended position.
Claim 8
Dependent Claim
160 words
An extensible joint for well pipe strings, comprising: a. an outer tubular means having means thereon for connecting said joint to an adjacent section of pipe string; b. inner tubular means telescopically engaging said outer tubular means for limited axial movement from a retracted position to an extended position relative to said outer tubular means; c. first seal means between said outer and inner tubular means carried by head means on the upper end of said inner tubular means, said head means having an upwardly facing annular surface area exposed to the pressure within said tubing string and a downwardly facing annular surface area exposed to the pressure within said tubing string and a downwardly facing annular surface area exposed to the pressure existing around said outer tubular means; d. second seal means carried by said inner tubular means for sealing engagement with an opening through apparatus in said well, when said inner tubular means is in said extended position.
Claim 9
Dependent Claim
39 words
A displacement joint as set forth in claim 6 in which said inner tubular means is connected to said outer tubular means, in said retracted position, by retainer means, said retainer means being releasable to permit said axial movement.
Claim 10
Dependent Claim
40 words
The displacement joint of claim 7 in which said inner tubular means is provided with closable valve means whereby a releasing force may be applied to said retainer means by applying pressure to said displacement joint through said pipe string.
Claim 11
Dependent Claim
218 words
An extensible joint for well pipe strings comprising: a. an outer tubular means having means thereon for connecting said joint to an adjacent section of pipe string; b. inner tubular means telescopically engaging said outer tubular means for limited axial movement from a retracted position to an extended position relative to said outer tubular means; c. first seal means between said outer and inner tubular means; d. second seal means carried by said inner tubular means for sealing engagement with an opening through apparatus in said well, when said inner tubular means is in said extended position; e. retainer means connecting said inner tubular means to said outer tubular means, in said retracted position, said retainer means being releasable to permit said axial movement; and f. valve means provided on said inner tubular member by which a releasing force mey be applied to said retainer means by applying pressure to said displacement joint through said pipe string, said valve means comprising a seat member, attached to said inner tubular means by connection means, and a closure member engageable with said seat member, said connection means being releasable at a predetErmined pressure level in said pipe string when said closure member engages said seat member to allow axial displacement of said seat member relative to said inner tubular member.
Claim 12
Dependent Claim
218 words
An extensible joint for well pipe strings comprising: a. an outer tubular means having means thereon for connecting said joint to an adjacent section of pipe string; b. inner tubular means telescopically engaging said outer tubular means for limited axial movement from a retracted position to an extended position relative to said outer tubular means; c. first seal means between said outer and inner tubular means; d. second seal means carried by said inner tubular means for sealing engagement with an opening through apparatus in said well, when said inner tubular means is in said extended position; e. retainer means connecting said inner tubular means to said outer tubular means, in said retracted position, said retainer means being releasable to permit said axial movement; and f. valve means provided on said inner tubular member by which a releasing force mey be applied to said retainer means by applying pressure to said displacement joint through said pipe string, said valve means comprising a seat member, attached to said inner tubular means by connection means, and a closure member engageable with said seat member, said connection means being releasable at a predetErmined pressure level in said pipe string when said closure member engages said seat member to allow axial displacement of said seat member relative to said inner tubular member.
Claim 13
Dependent Claim
40 words
The displacement joint of claim 9 in which said retainer means comprises a radially contractable latch member engageable with an annular groove in said seat member on said axial displacement to permit said axial movement of said inner tubular means.
Claim 14
Dependent Claim
58 words
The displacement joint of claim 10 in which said latch member comprises a first portion engaging said seat member and a second portion engaging said inner tubular member, said first and second portions being connected by attachment means which is frangible upon the existence of a predetermined pressure differential across said valve means from said inner tubular means.
Claim 15
Dependent Claim
40 words
A displacement joint as set forth in claim 6 in which said inner and outer tubular means are provided with cooperable locking means engageable in said extended position to prevent retraction of said inner tubular means from said extended position.
Claim 16
Dependent Claim
155 words
An extensible joint for well pipe strings comprising: a. an outer tubular means having means thereon for connecting said joint to an adjacent section of pipe string; b. inner tubular means telescopically engaging said outer tubular means for limited axial movement from a retracted position to an extended position relative to said outer tubular means; c. first seal means between said outer and inner tubular means; d. second seal means carried by said inner tubular means for sealing engagement with an opening through apparatus in said well, when said inner tubular means is in said extended position; and e. cooperable locking means provided on said inner and outer tubular means engageable in said extended position to prevent retraction of said inner tubular means from said extended position, said cooperable locking means including a roughened surface on said inner tubular means and slip means carried by said outer tubular means for engagement with said roughened surface.
Claim 17
Dependent Claim
155 words
An extensible joint for well pipe strings comprising: a. an outer tubular means having means thereon for connecting said joint to an adjacent section of pipe string; b. inner tubular means telescopically engaging said outer tubular means for limited axial movement from a retracted position to an extended position relative to said outer tubular means; c. first seal means between said outer and inner tubular means; d. second seal means carried by said inner tubular means for sealing engagement with an opening through apparatus in said well, when said inner tubular means is in said extended position; and e. cooperable locking means provided on said inner and outer tubular means engageable in said extended position to prevent retraction of said inner tubular means from said extended position, said cooperable locking means including a roughened surface on said inner tubular means and slip means carried by said outer tubular means for engagement with said roughened surface.
Claim 18
Dependent Claim
36 words
The displacement of claim 13 in which said slip means and said roughened surface comprise oppositely facing teeth permitting movement of said inner tubular means toward said extending position but preventing movement in the opposite direction.
Claim 19
Dependent Claim
37 words
The displacement joint of claim 6 in which said inner tubular means is provided with shoulder means engageable with said apparatus, in said extended position, to limit said axial movement and to support said inner tubular means.
Claim 20
Dependent Claim
18 words
The displacement joint of claim 15 in which said second seal means is carried below said shoulder means.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |