Autonomous junk collecting sleeve for a riser
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-007/12
E21B-031/08
출원번호
US-0054362
(2008-03-24)
등록번호
US-8162064
(2012-04-24)
발명자
/ 주소
Penisson, Dennis J.
출원인 / 주소
Wellbore Specialties, LLC
대리인 / 주소
Areaux, Raymond G.
인용정보
피인용 횟수 :
5인용 특허 :
3
초록▼
An autonomous junk collecting sleeve for a riser is provided. The sleeve is constructed and arranged to be independently lowered and seated above a subsea tree section and, subsequently, raised and removed independent of the work string. The autonomous junk collecting sleeve includes a first cylindr
An autonomous junk collecting sleeve for a riser is provided. The sleeve is constructed and arranged to be independently lowered and seated above a subsea tree section and, subsequently, raised and removed independent of the work string. The autonomous junk collecting sleeve includes a first cylindrical structure, a second cylindrical structure concentric to the first cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket. The J-channel basket is operable to collect debris traveling up through the bottom end and over of the second cylindrical structure for deposit therein.
대표청구항▼
1. An autonomous junk collecting sleeve for a riser comprising: a first outer cylindrical structure, a second inner cylindrical structure concentric to and shorter than the first outer cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-chann
1. An autonomous junk collecting sleeve for a riser comprising: a first outer cylindrical structure, a second inner cylindrical structure concentric to and shorter than the first outer cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket, the J-channel basket being operable to collect debris traveling up through the bottom end and over a top edge of the second inner cylindrical structure for deposit therein, wherein the first outer cylindrical structure comprises, at a top end, a brim operable to attach a tool thereto to lower and retrieve the sleeve. 2. An autonomous junk collecting sleeve for a riser comprising: a first outer cylindrical structure, a second inner cylindrical structure concentric to and shorter than the first outer cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket, the J-channel basket being operable to collect debris traveling up through the bottom end and over a top edge of the second inner cylindrical structure for deposit therein, wherein the first outer cylindrical structure comprises a brim which protrudes from the first outer cylindrical structure toward a longitudinal axis of the first outer cylindrical structure a distance that approximates said spatial relation at said bottom end between the first outer cylindrical structure and the second inner cylindrical structure. 3. The sleeve according to claim 2, wherein the first outer cylindrical structure is longer in length than the second inner cylindrical structure and forms a hollow interior cavity above the top edge of the second inner cylindrical structure and below the brim. 4. An autonomous junk collecting sleeve for a riser comprising: a first outer cylindrical structure, a second inner cylindrical structure concentric to and shorter than the first outer cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket, the J-channel basket being operable to collect debris traveling up through the bottom end and over a top edge of the second inner cylindrical structure for deposit therein, wherein an outer diameter of the first outer cylindrical structure is slightly smaller than an inner diameter of the riser. 5. The sleeve according to claim 4, wherein the inner diameter of the second inner cylindrical structure is the same as or larger than an inner diameter of a subsea tree section. 6. An autonomous junk collecting sleeve for a riser comprising: a first outer cylindrical structure, a second inner cylindrical structure concentric to and shorter than the first outer cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket, the J-channel basket being operable to collect debris traveling up through the bottom end and over a top edge of the second inner cylindrical structure for deposit therein, wherein the sleeve is operable to be seated at a bottom of the riser and supported at a riser seat above a subsea tree section. 7. An autonomous junk collecting sleeve for a riser comprising: a first outer cylindrical structure, a second inner cylindrical structure concentric to and shorter than the first outer cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket, the J-channel basket being operable to collect debris traveling up through the bottom end and over a top edge of the second inner cylindrical structure for deposit therein, wherein the first outer cylindrical structure comprises, at a top end, a brim operable to allow autonomous retrieval of the sleeve from a bottom of the riser. 8. An autonomous junk collecting sleeve for a riser comprising: a cylindrically-shaped, J-channel basket having a junk collecting space and a hollow throughbore center with access directly into the junk collecting space, the J-channel basket being operable to collect debris traveling up through the bottom end of the hollow throughbore center and over the access for deposit of said debris in the junk collecting space, further comprising a brim coupled to a top end of the J-channel basket, the brim being operable to attach a tool thereto to lower and retrieve the J-channel basket. 9. An autonomous junk collecting sleeve for a riser comprising: a cylindrically-shaped, J-channel basket having a junk collecting space and a hollow throughbore center with access directly into the junk collecting space, the J-channel basket being operable to collect debris traveling up through the bottom end of the hollow throughbore center and over the access for deposit of said debris in the junk collecting space, wherein the J-channel basket comprises a first outer cylindrical structure, a second inner cylindrical structure concentric to and shorter than the first outer cylindrical structure and which are joined together in spatial relation at a bottom end. 10. The sleeve according to claim 9, wherein the first outer cylindrical structure comprises a brim which protrudes from the first outer cylindrical structure toward a longitudinal axis of the first outer cylindrical structure a distance that approximates said spatial relation at said bottom end between the first outer cylindrical structure and the second inner cylindrical structure. 11. The sleeve according to claim 10, wherein the first outer cylindrical structure is longer in length than the second inner cylindrical structure and forms an upper hollow throughbore center above a top edge of the second inner cylindrical structure and below the brim. 12. The sleeve according to claim 9, wherein an outer diameter of the first outer cylindrical structure is slightly smaller than an inner diameter of the riser. 13. The sleeve according to claim 12, wherein the inner diameter of the second inner cylindrical structure is the same as or larger than an inner diameter of a subsea tree section. 14. The sleeve according to claim 9, wherein the sleeve is operable to be seated at a bottom of the riser and supported at a riser seat above a subsea tree section. 15. The sleeve according to claim 9, wherein the first outer cylindrical structure comprises, at a top end, a brim operable to have attached thereto a fishing tool to autonomously retrieve the sleeve from a bottom of the riser. 16. A method of cleaning a wellbore comprising: cleaning a riser from an upper surface to a subsea tree section;lowering an autonomous junk collecting sleeve at a seat of the riser;installing a work string through the riser and the autonomous junk collecting sleeve to a depth of the wellbore, the work string being independent of the sleeve;cleaning a wellbore with the work string;collecting debris from the wellbore in the autonomous junk collecting sleeve, simultaneously with the cleaning of the wellbore; and,during the cleaning of the wellbore, performing at least one of brushing and scraping of some of the debris from a casing wall of the wellbore. 17. The method according to claim 16, further including, during cleaning of the riser, employing very high fluid flow rates in the riser. 18. The method according to claim 16, further including, during the cleaning of the wellbore, moving the work string; and further including maintaining the autonomous junk collecting sleeve stationary at the seat of the riser during said moving of the work string. 19. The method according to claim 16, wherein the collecting of the debris includes collecting from the wellbore one or more of leftover drilling fluids, cement bits, iron debris and caked deposits from a casing wall in the autonomous junk collecting sleeve. 20. The method according to claim 19, further including, during the collecting of the debris, the following: channeling drilling fluid through an annulus between the work string and a hollow throughbore center of the autonomous junk collecting sleeve; andaccessing a junk collecting space of the autonomous junk collecting sleeve directly from the annulus to deposit the debris. 21. The method according to claim 16, further including: fishing the autonomous junk collecting sleeve from the riser. 22. The method according to claim 21, wherein the fishing further includes: fishing the autonomous junk collecting sleeve from the riser after the cleaning of the wellbore is complete. 23. The method according to claim 16, further including, during the cleaning of the wellbore, performing high velocity fluid jetting in the wellbore toward the casing wall.
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