Downhole magnet, downhole magnetic jetting tool and method of attachment of magnet pieces to the tool body
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-031/06
E21B-037/00
출원번호
US-0710653
(2012-12-11)
등록번호
US-9121242
(2015-09-01)
발명자
/ 주소
Leiper, Simon
Robertson, Kevin
출원인 / 주소
Odfjell Well Services Norway AS
대리인 / 주소
North, Brett A.
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A tool for suspending in a well retrieves various metal debris from the well, and includes an elongated tool body with a plurality of magnets included in a plurality longitudinal ridges which are circumferentially spaced. In the method a plurality of magnets can be positioned within openings, recess
A tool for suspending in a well retrieves various metal debris from the well, and includes an elongated tool body with a plurality of magnets included in a plurality longitudinal ridges which are circumferentially spaced. In the method a plurality of magnets can be positioned within openings, recesses, or pockets in each ridge, and held in place by one or more retaining plates, the tool being connected to a drill string and lowered into a well.
대표청구항▼
1. A magnet tool for use in removing ferrous material from a wellbore, the tool comprising: an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of circumferentially spaced apart longitudinal rid
1. A magnet tool for use in removing ferrous material from a wellbore, the tool comprising: an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of circumferentially spaced apart longitudinal ridges with longitudinally extending gaps between each pair of said ridges, each ridge being in the form of a flange projecting radially from the longitudinal axis and being aligned with the longitudinal axis, said flange having spaced apart first and second radially extending surface areas and an outer surface spaced away from the longitudinal axis and that extends from the first radially extending surface area to the second radially extending surface area;wherein each of the flanges includes a plurality of magnetic elements detachably mounted in spaced apart configurations,wherein the plurality of magnetic elements are detachably held in place by a removable retaining plate, the retaining plate having an opening exposing to an exterior surface at least a portion of plurality of magnetic elements; andwherein each magnetic element extends to at least one said radially extending surface areas and in communication with a said longitudinally extending gap. 2. The magnet tool of claim 1, wherein between the plurality of longitudinal flanges are collection areas for ferromagnetic debris. 3. The magnet tool of claim 1, wherein the projecting ridges extend radially from a side surface of the tool body. 4. The magnet tool of claim 1, wherein at least one opening is provided in each flange at a said radially extending surface area to mount a plurality of spaced apart magnetic elements therein. 5. The magnet tool of claim 1, wherein each of the radially projecting ridges includes a radial slot, and the plurality of magnetic elements are detachably held in place by said removable retaining plate slidably inserted in the slot, and the slot is located in a plane that is parallel to the longitudinal axis. 6. The magnet tool of claim 1, wherein each plurality of magnetic elements are spaced apart in their respective longitudinal ridge by a spacer. 7. The magnet tool of claim 6, wherein the spacer is comprised of a non-magnetic material. 8. The magnet tool of claim 7, wherein the spacer magnetically isolates from each other at least two of the magnets spaced apart by the spacer. 9. The magnet tool of claim 1, wherein each of the longitudinal ridges includes first and second faces and an opening extending from the first to second face, and the magnetic element is inserted into the opening. 10. The magnet tool of claim 1, wherein the tool body comprises first and second sections which are detachably connected together, and the second section includes the plurality of longitudinal ridges. 11. A magnet tool for use in removing ferrous material from a wellbore, the tool comprising: an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis;wherein each of the ridges includes a plurality of magnetic elements detachably mounted in a spaced apart configurations,wherein the plurality of magnetic elements are detachably held in place by a removable retaining plate, the retaining plate having an opening exposing to an exterior surface at least a portion of plurality of magnetic elements wherein each of the removable retaining plates are slidably locked in place in a longitudinal direction by a fastener having retracted and extended states. 12. The magnet tool of claim 11, wherein the fastener is in an extended stated to slidably lock in place the retaining plate. 13. A magnet tool for use in removing ferrous material from a wellbore, the tool comprising: an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis;wherein each of the ridges includes a plurality of magnetic elements detachably mounted in a spaced apart configurations,wherein the plurality of magnetic elements are detachably held in place by a removable retaining plate, the retaining plate having an opening exposing to an exterior surface at least a portion of plurality of magnetic elements,wherein each longitudinal ridge includes at least one jetting nozzle fluidly connected to the through bore. 14. A magnet tool for use in removing ferrous material from a wellbore, the tool comprising: an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis;wherein each of the ridges includes a plurality of magnetic elements detachably mounted in a spaced apart configurations,wherein the plurality of magnetic elements are detachably held in place by a removable retaining plate,the retaining plate having an opening exposing to an exterior surface at least a portion of plurality of magnetic elements,wherein each longitudinal ridge includes a plurality of jetting nozzles fluidly connected to the through bore. 15. A magnet tool for use in removing ferrous material from a wellbore, the tool comprising: an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis;wherein each of the ridges includes a plurality of magnetic elements detachably mounted in a spaced apart configurations,wherein the plurality of magnetic elements are detachably held in place by a removable retaining plate,the retaining plate having an opening exposing to an exterior surface at least a portion of plurality of magnetic elements,wherein at least one longitudinal ridge includes a plurality of jetting nozzles fluidly connected to the through bore, with at least two nozzles having varying angles of jetting for fluid exiting the nozzles. 16. The magnet tool of claim 15, wherein the one of the jetting nozzles is substantially perpendicular to the longitudinal axis and another of the jetting nozzles is not substantially perpendicular to the longitudinal axis. 17. The magnet tool of claim 15, wherein the one of the jetting nozzles jets is substantially perpendicular to the longitudinal axis and another of the jetting nozzles jets toward the upper end of the tool body and another of the jetting nozzles jets towards the lower end of the tool body. 18. A magnet tool for use in removing ferrous material from a wellbore, the tool comprising: an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges having first and second longitudinal sides and projecting radially from the longitudinal axis and being longitudinally aligned with the longitudinal axis;wherein each of the ridges includes a plurality of magnetic elementsdetachably mounted on both the first and second sides of the longitudinal ridges,wherein each of the plurality of magnetic elements are detachably held in place by removable retaining plates,wherein at least one longitudinal ridge includes a plurality of jetting nozzles fluidly connected to the through bore, with at least two nozzles exiting between the magnetic elements mounted on the first and second sides of the ridge. 19. The magnet tool of claim 18, wherein each of the plurality of longitudinal ridges includes first and second faces and an opening extending from the first to second face, and the magnetic element is inserted into the opening. 20. The magnet tool of claim 18, wherein at least one of the jetting nozzles is substantially perpendicular to the longitudinal axis and another of the jetting nozzles is not substantially perpendicular to the longitudinal axis. 21. The magnet tool of claim 18, wherein the one of the jetting nozzles jets is substantially perpendicular to the longitudinal axis and another of the jetting nozzles jets toward the upper end of the tool body and another of the jetting nozzles jets towards the lower end of the tool body. 22. The magnet tool of claim 18, wherein the tool body comprises first and second sections which are detachably connected together, and the second section includes the plurality of ridges. 23. The magnet tool of claim 18, wherein between the plurality of longitudinal ridges are collection areas are recessed compared to the outer projections of the ridges. 24. The magnet tool of claim 18, wherein the projecting ridges extend from a side surface of the tool body. 25. The magnet tool of claim 18, wherein each of the radially projecting ridges includes a radial slot, and the magnetic element is detachably held in place by a removable retaining plate slidably inserted in the slot, and the slot is located in a plane that is parallel to the longitudinal axis. 26. The magnet tool of claim 25, wherein each of the removable retaining plates are slidably locked in place in a longitudinal direction by a threaded fastener. 27. The magnet tool of claim 26, wherein the threaded fastener is a grub screw. 28. The magnet tool of claim 18, wherein each magnetic element includes a plurality of magnets spaced apart by a spacer. 29. The magnet tool of claim 28, wherein the spacer is comprised of a non-magnetic material. 30. The magnet tool of claim 29, wherein the spacer magnetically isolates from each other at least two of the magnets spaced apart by the spacer. 31. The magnet tool of claim 18, wherein each longitudinal ridge includes at least one said jetting nozzle fluidly connected to the through bore. 32. The magnet tool of claim 18, wherein each longitudinal ridge includes a plurality of said jetting nozzles fluidly connected to the through bore. 33. A method of cleaning debris in a wellbore comprising the steps of: (a) providing a magnet tool comprising:an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of circumferentially spaced apart longitudinal ridges with a longitudinally extending gap in between each pair of said ridges each said ridge projecting radially from the longitudinal axis and being aligned with the longitudinal axis, and each of the longitudinal ridges having a pair of opposed longitudinally extending faceseach of the longitudinally extending faces having longitudinally extending openings opening to at least one of the pair of opposed longitudinally extending faces;(b) for each of the plurality of longitudinal ridges inserting a plurality of magnets through the opening in one of the pair of opposed faces for such ridge;(c) for each of the plurality of longitudinal ridges locking in place each of the inserted plurality of magnets in their respective longitudinally extending openings by sliding longitudinally in place a locking retainer plate in the longitudinal ridge on the same face that the plurality of magnets inserted in step “b”, each of the locking retainer plate having openings to expose at least part of the outwardly oriented faces of the magnets inserted in step “b”; and(d) after step “c” inserting the magnet tool into a well bore and collecting debris in said gaps which is magnetically attracted to the magnets of step “b”. 34. The method of claim 33, wherein in step “c” each retaining plate is slid in a direction parallel to the longitudinal axis. 35. The method of claim 33, wherein in step “a” the longitudinally extending openings extend between and through the pair of opposed faces. 36. The method of claim 33, wherein in step “a” the longitudinally extending openings do not extend between and through the pair of opposed faces, and a pair of opposed retaining plates are slidably locked in place on each face of the pair of opposed faces of the longitudinal ridge. 37. The method of claim 33, wherein in step “b” the north and south poles of each of the inserted magnets are oriented substantially perpendicular to at least one radial line intersecting both the respective longitudinal ridge and the longitudinal axis. 38. The method of claim 37, wherein the magnetic fields of magnets in adjacent longitudinal ridges overlap each other. 39. The method of claim 33, wherein in step “a” the radially extending ridges and symmetrically distributed, and central angles between the radially extending ridges are less than ninety degrees. 40. The method of claim 33, wherein in step “a” the tool body comprises a sleeve detachably connectable to a mandrel, and the plurality of longitudinal ridges are included on the sleeve. 41. The method of claim 40 wherein the sleeve is connected on the mandrel by sliding the sleeve longitudinally along the mandrel. 42. The method of claim 41, wherein the sleeve has an inner shoulder and the mandrel has an outer shoulder, and sliding movement of the sleeve relative to the mandrel is restricted by the sleeve shoulder contacting the mandrel shoulder. 43. The method of claim 41, further comprising the step of providing a second sleeve of substantially the same construction as the first sleeve, the second sleeve have a second set of magnets, and after step “d”, at the well site sliding the first sleeve with collected debris off of the mandrel, and sliding on the second sleeve and inserting the magnet tool with second sleeve into a well bore and collecting debris which is magnetically attracted to the magnets in the second sleeve. 44. The method of claim 33, wherein each of the respective plurality of ridges include respective first and second faces, which respective first and second faces are substantially parallel to each other along with a radial line extending from of the longitudinal axis of the through bore between the respective first and second faces and out the top of the ridge, the respective first and second face having respective recesses which extend from their respective opposing faces to a base portion of the respective recess, and between the base portions of opposing recesses being a gap wherein at least one nozzle line extending through the gap which nozzle line being fluidly connected to the through bore, and exiting the respective ridge from the top of the ridge. 45. A method of cleaning debris in a wellbore comprising the steps of: (a) providing a magnet tool comprising:an elongated tool body, the tool body having first and second ends; a longitudinal axis; and a through bore extending from the first to second end; a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis, and each of the longitudinal ridges having a pair of opposed longitudinally extending faceseach of the longitudinally extending faces having longitudinally extending openings opening to at least one of the pair of opposed longitudinally extending faces;(b) for each of the plurality of longitudinal ridges inserting a plurality of magnets through the opening in one of the pair of opposed faces for such ridge;(c) for each of the plurality of longitudinal ridges locking in place each of the inserted plurality of magnets in their respective longitudinally extending openings by sliding longitudinally in place a locking retainer plate in the longitudinal ridge on the same face that the plurality of magnets inserted in step “b”, each of the locking retainer plate having openings to expose at least part of the outwardly oriented faces of the magnets inserted in step “b”;(d) after step “c” inserting the magnet tool into a well bore and collecting debris which is magnetically attracted to the magnets of step “b”;(e) wherein in step “c”, the retainer plates are locked in place using recessing quick lock/quick unlock fasteners. 46. The method of claim 45, wherein before step “c” the respective fasteners are recessed in their respective longitudinal ridge and, after step “c” locking occurs when the fastener is expanded into the retainer plate. 47. A method of cleaning debris in a wellbore comprising the steps of: (a) providing a magnet tool comprising:an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis, and each of the longitudinal ridges having a pair of opposed longitudinally extending faceseach of the longitudinally extending faces having longitudinally extending openings opening to at least one of the pair of opposed longitudinally extending faces;(b) for each of the plurality of longitudinal ridges inserting a plurality of magnets through the opening in one of the pair of opposed faces for such ridge;(c) for each of the plurality of longitudinal ridges locking in place each of the inserted plurality of magnets in their respective longitudinally extending openings by sliding longitudinally in place a locking retainer plate in the longitudinal ridge on the same face that the plurality of magnets inserted in step “b”, each of the locking retainer plate having openings to expose at least part of the outwardly oriented faces of the magnets inserted in step “b”;(d) after step “c” inserting the magnet tool into a well bore and collecting debris which is magnetically attracted to the magnets of step “b”;(e) wherein in step “a” each longitudinal ridge includes at least one jetting nozzle fluidly connected to the through bore. 48. A method of cleaning debris in a wellbore comprising the steps of: (a) providing a magnet tool comprising:an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis, and each of the longitudinal ridges having a pair of opposed longitudinally extending faceseach of the longitudinally extending faces having longitudinally extending openings opening to at least one of the pair of opposed longitudinally extending faces;(b) for each of the plurality of longitudinal ridges inserting a plurality of magnets through the opening in one of the pair of opposed faces for such ridge;(c) for each of the plurality of longitudinal ridges locking in place each of the inserted plurality of magnets in their respective longitudinally extending openings by sliding longitudinally in place a locking retainer plate in the longitudinal ridge on the same face that the plurality of magnets inserted in step “b”, each of the locking retainer plate having openings to expose at least part of the outwardly oriented faces of the magnets inserted in step “b”;(d) after step “c” inserting the magnet tool into a well bore and collecting debris which is magnetically attracted to the magnets of step “b”;(e) wherein in step “a” each longitudinal ridge includes a plurality of jetting nozzles fluidly connected to the through bore. 49. A method of cleaning debris in a wellbore comprising the steps of: (a) providing a magnet tool comprising:an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis, and each of the longitudinal ridges having a pair of opposed longitudinally extending faceseach of the longitudinally extending faces having longitudinally extending openings opening to at least one of the pair of opposed longitudinally extending faces;(b) for each of the plurality of longitudinal ridges inserting a plurality of magnets through the opening in one of the pair of opposed faces for such ridge;(c) for each of the plurality of longitudinal ridges locking in place each of the inserted plurality of magnets in their respective longitudinally extending openings by sliding longitudinally in place a locking retainer plate in the longitudinal ridge on the same face that the plurality of magnets inserted in step “b”, each of the locking retainer plate having openings to expose at least part of the outwardly oriented faces of the magnets inserted in step “b”;(d) after step “c” inserting the magnet tool into a well bore and collecting debris which is magnetically attracted to the magnets of step “b”;(e) wherein in step “a” the tool body comprises a sleeve detachably connected to a mandrel, and the plurality of longitudinal ridges are included on the sleeve;(f)wherein the sleeve is connected on the mandrel by sliding the sleeve longitudinally along the mandrel;(g) wherein the sleeve has a first wall section of a first outer diameter, and a second wall section of a second outer diameter, the second outer diameter being larger than the first outer diameter, and the plurality of ridges extend from the second outer diameter. 50. A method of cleaning debris in a wellbore comprising the steps of: (a) providing a magnet tool comprising:an elongated tool body, the tool body having first and second ends; a longitudinal axis;and a through bore extending from the first to second end;a plurality of longitudinal ridges projecting radially from the longitudinal axis and being aligned with the longitudinal axis, and each of the longitudinal ridges having a pair of opposed longitudinally extending faceseach of the longitudinally extending faces having longitudinally extending openings opening to at least one of the pair of opposed longitudinally extending faces;(b) for each of the plurality of longitudinal ridges inserting a plurality of magnets through the opening in one of the pair of opposed faces for such ridge;(c) for each of the plurality of longitudinal ridges locking in place each of the inserted plurality of magnets in their respective longitudinally extending openings by sliding longitudinally in place a locking retainer plate in the longitudinal ridge on the same face that the plurality of magnets inserted in step “b”, each of the locking retainer plate having openings to expose at least part of the outwardly oriented faces of the magnets inserted in step “b”;(d) after step “c” inserting the magnet tool into a well bore and collecting debris which is magnetically attracted to the magnets of step “b”;(e) wherein in step “a” the tool body comprises a sleeve detachably connected to a mandrel, and the plurality of longitudinal ridges are included on the sleeve;(f) wherein the sleeve is connected on the mandrel by sliding the sleeve longitudinally along the mandrel;(g) wherein the sleeve is fluidly connected to the through bore, and between the sleeve and mandrel is an annular area, and a plurality of ports are fluidly connected to the through bore and the annular area. 51. The method of claim 50, wherein each longitudinal ridge includes at least one jetting nozzle fluidly connected to the through bore. 52. The method of claim 50, wherein in each longitudinal ridge includes a plurality of jetting nozzles fluidly connected to the through bore.
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이 특허에 인용된 특허 (3)
Ruttley David J., Apparatus for retrieving metal objects from a wellbore.
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