US3601206A — Side inlet swivel

Claim 1

Independent Claim 260 words

A side inlet swivel, comprising: a swivel body having a longitudinal bore through at least a portion thereof; said swivel body having a side opening in communication with said longitudinal bore; a side inlet housing adapted to be positioned around said body and having a side inlet therewith aligned with said side opening in said swivel body for admitting fluid from said side inlet housing into said longitudinal bore of said swivel body; a bearing housing having bearings disposed between said swivel body and said housing; means connecting said bearing housing to said side inlet housing for thereby permitting rotation of said swivel body relative to said bearing housing and said side inlet housing; an upper annular packing between said side inlet housing and said swivel body and disposed above said side inlet; a lower annular packing between said side inlet housing and said swivel body and disposed below said side inlet; said longitudinal bore of said swivel body extending for the full length thereof and being formed with a lower counterbore; an inner tube disposed in said swivel body and having its bore in fluid communication with said bore of said swivel body; and at least a portion of said external surface of said inner tube spaced from the wall of said counterbore of said swivel body to provide a longitudinal flow passage directing fluid from said side opening of said swivel body to the lower end of said inner tube for mixing such fluid with fluid flowing through the bore of said swivel body and said inner tube.

Claim 2

Dependent Claim 260 words

A side inlet swivel, comprising: a swivel body having a longitudinal bore through at least a portion thereof; said swivel body having a side opening in communication with said longitudinal bore; a side inlet housing adapted to be positioned around said body and having a side inlet therewith aligned with said side opening in said swivel body for admitting fluid from said side inlet housing into said longitudinal bore of said swivel body; a bearing housing having bearings disposed between said swivel body and said housing; means connecting said bearing housing to said side inlet housing for thereby permitting rotation of said swivel body relative to said bearing housing and said side inlet housing; an upper annular packing between said side inlet housing and said swivel body and disposed above said side inlet; a lower annular packing between said side inlet housing and said swivel body and disposed below said side inlet; said longitudinal bore of said swivel body extending for the full length thereof and being formed with a lower counterbore; an inner tube disposed in said swivel body and having its bore in fluid communication with said bore of said swivel body; and at least a portion of said external surface of said inner tube spaced from the wall of said counterbore of said swivel body to provide a longitudinal flow passage directing fluid from said side opening of said swivel body to the lower end of said inner tube for mixing such fluid with fluid flowing through the bore of said swivel body and said inner tube.

Claim 3

Dependent Claim 72 words

The structure set forth in claim 1, including: a washpipe disposed between said packings and the external surface of said swivel body; said washpipe having a lateral opening in alignment with said inlet opening in said swivel body; and means for releasably securing said washpipe to said swivel body whereby the washpipe may be readily replaced when wear thereon occurs due to the engagement by said packings during the relative rotation therebetween.

Claim 4

Dependent Claim 65 words

The structure set forth in claim 1, including: a washpipe disposed between said packings and the external surface of said swivel body; and means mounted on the external surface of said swivel body for releasably securing said washpipe to said swivel body whereby the washpipe may be readily replaced when wear thereon occurs due to the engagement by said packings during the relative rotation therebetween.

Claim 5

Dependent Claim 23 words

The structure set forth in claim 1, including: lock means for locking said inner tube to said swivel body for rotation therewith. rotation

Claim 6

Dependent Claim 51 words

The structure set forth in claim 4, wherein said lock means includes: a releasable sub releasably mounted on the lower end of said swivel body; and coacting lugs on said inner tube and said sub for engagement with each other to transmit rotation from said swivel body to said inner tube.

Claim 7

Dependent Claim 46 words

The structure set forth in claim 5, wherein: said sub has an internal shoulder for receiving the lugs on said inner tube for preventing longitudinal movement of said inner tube relative to said sub and swivel body when said sub is secured to said swivel body.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-08-23	1975-02-22	1975-08-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-08-23	1979-02-22	1979-08-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-08-23	1983-02-22	1983-08-24	$7700.00	Window Closed / Lapsed

Side inlet swivel

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