Electrical submersible pump system connection adapter
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-035/04
H02K-015/00
F16J-015/16
출원번호
US-0635191
(2009-12-10)
등록번호
US-8419390
(2013-04-16)
발명자
/ 주소
Merrill, Dan A.
Shaffer, Daniel A.
Knox, Dick L.
출원인 / 주소
Baker Hughes Incorporated
대리인 / 주소
Bracewell & Giuliani LLP
인용정보
피인용 횟수 :
3인용 특허 :
14
초록▼
An electrical submersible pumping assembly having a seal section and a motor section, and seals that prevent leakage from the seal section and the motor section during assembly. The seals cooperate with a coupling assembly for coupling together shafts from both the seal section and motor section. Th
An electrical submersible pumping assembly having a seal section and a motor section, and seals that prevent leakage from the seal section and the motor section during assembly. The seals cooperate with a coupling assembly for coupling together shafts from both the seal section and motor section. The coupling assembly outer diameter enlarges at a shoulder that circumscribes its outer surface. In one example, the seal that prevents leakage from the seal assembly provides a sealing interface around the larger diameter portion of the coupling assembly, that is removable by sliding the coupling so its smaller diameter portion is adjacent the seal assembly. The motor section is sealed by another sealing assembly that includes a body that circumscribes the motor shaft to define an annulus, a sealing disk selectively fills the annulus. The sealing disk can also be slid away from within the body while coupling the shafts with the coupling assembly.
대표청구항▼
1. An electrical submersible pumping system comprising: a seal section having a housing with an opening at an end, fluid within the housing, and a seal shaft within the opening in the seal housing;a motor section having a housing having an opening at an end, and a motor shaft extending from the open
1. An electrical submersible pumping system comprising: a seal section having a housing with an opening at an end, fluid within the housing, and a seal shaft within the opening in the seal housing;a motor section having a housing having an opening at an end, and a motor shaft extending from the opening in the motor housing;a tubular coupling assembly having a splined axial bore and selectively moveable between a pre-assembly position with the seal shaft partially inserted into an inner end of the coupling assembly and an assembled position axially spaced from the pre-assembly position with the seal shaft fully inserted into the inner end and the motor shaft fully inserted into an outer end of the coupling assembly to transmit torque from the motor shaft to the seal shaft; anda seal assembly having a body selectively coupled to the housing of the seal section and having a seal element that projects radially inward from the body and into sealing engagement with an outer diameter portion of the coupling assembly to thereby form a fluid barrier between the outer diameter of the coupling, assembly and housing of the seal section when the coupling assembly is in the pre-assembly position and when the coupling assembly is moved to the assembled position, the fluid barrier is removed to define a flow path between the seal section and the motor sections. 2. The system of claim 1, wherein when the coupling assembly is urged axially along the motor shaft so that the larger outer radius portion is out of sealing contact with the seal element and the seal element circumscribes the smaller outer radius portion, a fluid flow path is formed within an annular space between the coupling assembly and seal housing and an annular space between the seal element and the smaller outer radius portion. 3. The system of claim 1, wherein the end of the axial bore having the seal shaft inserted has a larger outer radius than the opposite end having the motor shaft inserted. 4. The system of claim 1, further comprising splines formed on the outer surface of the motor shaft and seal shaft that are engaged with corresponding splines formed within the axial bore when the motor shaft and seal shaft are inserted within the coupling assembly. 5. The system of claim 1, wherein the seal assembly body is coaxially mounted to the seal section housing on one side, and coaxially mounted to the motor section housing on an opposite side. 6. The system of claim 2, wherein the coupling assembly is axially slideable into the seal housing to slide the shoulder past the seal assembly so that the seal assembly circumscribes the smaller outer radius portion. 7. The system of claim 1, wherein the seal assembly comprises an annular base pressed into an axial passage in the body and wherein the seal element has an outer diameter that attaches to the annular base. 8. The system of claim 1, further comprising an annular sealing assembly affixed to the motor housing comprising, an annular body, a cavity in the annular body through which the motor shaft extends, a sealing disk in the annular space between the motor shaft moveable along the motor shaft so that a fluid communication opens between the motor shaft and the annular body. 9. The system of claim 1, wherein the body comprises a plate like flange. 10. The system of claim 9, further comprising an additional body that comprises a platelike flange and is coaxially disposed with the seal assembly body, and the flange has bolt holes that are selectively registered with bolt holes of the seal assembly body, so that when the coupling assembly is in the assembled position, threaded fasteners can be inserted through the registered bolt holes to attach the seal section, motor section, and a seal section fluid retainer. 11. The system of claim 9, further comprising an upper counterbore that engages seal section seals on the outer diameter of the seal section and a lower portion with external seals that engage a bore of the motor housing. 12. A method of forming an electrical submersible pumping system comprising: (a) providing a seal section having a seal housing and a seal shaft;(b) providing, a motor section having a motor housing and a motor shaft;(c) sliding a coupling partially over an end of the seal shaft and positioning the coupling in a pre-assembly position;(d) retaining fluid in the seal section housing with an annular disklike seal assembly;(e) inserting an end of the motor shaft into the coupling opposite the seal shaft while the coupling is in the pre-assembly position; and(f) with the motor shaft, pushing the coupling further into the seal section housing, to position the coupling in the assembled position, and disengage the seal from sealing engagement with the coupling so that the motor housing and the seal housing are in fluid communication with each other. 13. The method of claim 12, wherein the coupling outer diameter transitions at a shoulder on its outer surface from a larger diameter to a smaller diameter and positioning the seal assembly so that it circumscribes the larger diameter portion of the coupling. 14. The method of claim 12, further comprising setting a seal in a space between the motor shaft and the motor housing. 15. An electrical submersible pumping system comprising: a seal section comprising; a housing,an opening at an end of the housing,fluid within the housing, anda seal shaft within the opening in the seal housing;a motor section comprising: a housing,an opening at an end of the housing,fluid within the housing, anda motor shaft within the opening in the motor housing;a disklike seal assembly coupled on an end of the seal section and having an annular seal element;a tubular coupling assembly having a body, a splined bore formed axially through the body and haying the motor shaft and seal shaft, inserted in opposite ends of the bore, a larger diameter portion along a portion of the outer circumference of the body, a smaller diameter portion along a portion of the outer circumference of the body, and a shoulder circumscribing the body defining a transition between the smaller diameter portion and the larger diameter portion,the coupling assembly in a first position having the body outer surface coaxially disposed to and in sealing contact with the seal element at a location along its larger diameter portion and slideable to a second position having the smaller diameter portion circumscribed by the seal element to provide an annular space between the body and the seal assembly. 16. The pumping system of claim 15, further comprising an annular sealing assembly affixed to the motor housing comprising, an annular body, an axial bore in the body through which the motor shaft extends, a sealing disk in the annular space between the motor shaft moveable along the motor shaft so that a fluid communication opens between the motor shaft and the body. 17. The pumping system of claim 15, wherein the seal assembly comprises an annular base pressed into an axial passage in the seal assembly and wherein the seal element has an outer diameter that attaches to the annular base.
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