[특허]Adjustable stuffing boxes for pump rods

[미국특허] Adjustable stuffing boxes for pump rods 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E21B-033/03
출원번호	US-0188921 (1998-11-09)
발명자 / 주소	Bassinger Grey Dalton III Joseph L.
출원인 / 주소	Auto Pax Products, L.L.C.
대리인 / 주소	Akin, Gump, Strauss, Hauer & Feld, L.L.P.
인용정보	피인용 횟수 : 11 인용 특허 : 13

초록 ▼

Stuffing boxes for use with reciprocating or rotating pump rods for downhole pumps include a lower housing adapted to be mounted on a wellhead and provided with internal bores for receiving the pump rod and a packing housing engaged with the lower housing and including a central bore for receiving a packing assembly and a packing gland. The packing gland may include an annular flange for supporting circumferentially spaced bolts engageable with cooperating bores in the packing housing to adjust compression on the packing and to provide for rotatably indexing the gland to minimize uneven wear. An axially slidable bushing mounted in the packing housing or lower housing is engageable with the opposite end of the packing assembly and is provided with a transverse annular shoulder engaged by a bias spring for exerting compression forces on the packing assembly. The bushing includes a transverse end face exposed to pressure fluid to also urge the bushing into engagement with the packing assembly. An annular cavity for the bushing bias spring may be filled with a lubricant at neutral pressure provided by equal diameter portions of the bushing. An annular packoff element may be disposed in the lower housing and engaged by the packing housing to form a temporary seal during repair or replacement of the packing assembly and/or the packing gland.

대표청구항 ▼

[ What is claimed is:] [1.] A stuffing box for a cylindrical pump rod comprising:a first housing adapted to be supported on a structure which includes a passage in which pressure fluids are present and for which a seal is to be formed around said pump rod to prevent pressure fluid from escaping said passage, said first housing including a first bore forming a clearance bore for said pump rod, a second bore larger than said first bore, and a first portion extending between said second bore and a transverse end wall of said first housing;a packing housing including a second portion engageable with said first portion of said first housing, said packing housing including a central bore formed therein;a packing assembly disposed in said bore in said packing housing and operable to be in sealing engagement with said pump rod;a packing gland operably engageable with said packing assembly at substantially one end thereof;a bushing including a first part slidably disposed in said bore in said packing housing and operably engageable with an opposite end of said packing assembly for compressing said packing assembly, said bushing including an end face exposed to pressure fluid from said passage for urging said bushing to compress said packing assembly, a transverse shoulder and a second part extending from said shoulder in sliding relationship with a bore formed in one of said housings and including said end face exposed to said pressure fluid; andspring means operably engageable with said shoulder for urging said bushing into forcible engagement with said packing assembly to impose compression forces on said packing assembly.

이 특허에 인용된 특허 (13) 인용/피인용 타임라인 분석

Turanyi Sandor (P.O. Box 845 Stafford TX 77477), Apparatus for sealing an oil well pump polished rod.
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Gilbertson Thomas A. (216 Sandringham ; N. Moraga CA 94566), Hydraulic pump driving unit for oil wells.
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Hoff, H. Milton, Inverted cone stuffing box.
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White Orvel O. (401 Shasta St. Taft CA 93208), Leakproof stuffing box with external lubrication for polish rod.
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Gilbertson Thomas A. (216 Sandringham ; N. Moraga CA 94566), Oil well pump driving unit.
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Bassinger Grey ; Dalton Joseph L., Rotary stuffing box and seal assembly.
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Wentworth Donald (Tufnell Park EN), Seals for rotating shafts, especially for stern tube seals for ships.
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Bassinger Grey (1308 S. Midkiff ; Ste. 125 Midland TX 79701), Self aligning stuffing box for pumpjack units.
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Bassinger Grey (6977 E. Commerce St. Odessa TX 79760), Self aligning stuffing box for pumpjack units.
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Bassinger Grey (c/o Max Design ; 1308 S. Midkiff ; Suite 125 Midland TX 79701), Self aligning stuffing box for pumpjack units.
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Rode Walter H. (Calle B ; Q ; Los Mangos ; Urb. Los Marios Caracas VEX), Spillproof oil well seal.
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Bump David L. (7380 Maple Ter. Traverse City MI 49684), Wellhead stuffing box for polished rod and accessories for same.
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Heinonen Robert L. (Dallas TX), Wellhead with safety valve for pumping well.
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이 특허를 인용한 특허 (11) 인용/피인용 타임라인 분석

Mitchell, Bruce, Annular pressure spool.
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Kimberley, Kevin, Articulated seal.
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McCollin, Chris, Dual stripper assembly for slick cable.
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Fan, Andy, Fluid valve and a single shaft-sealing module thereof.
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Stanton, Eddie N.; Strickland, Michael L., Packing cartridges and pressure-dampening elements for plunger-type pumps.
상세보기
Strickland, Michael L., Reducing emissions of VOCs from low-pressure storage tanks.
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McCreedy, Paul; Thiry, Merlin; Neudorf, Ray, Rod pump stuffing box.
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Thoma, Lynne A.; Wilkinson, Mark R., Seal bearing assembly with annular cylinder of two outer cylindrical bearings and at least two braided packing members therebetween with all having equal inner and outer radii to fill the seal cavity of a mechanical device.
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Thoma, Lynne A.; Wilkinson, Mark R., Seal-bearing assembly.
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Toner, Michael, Sealing device and a method of repairing/replacing sealing devices.
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Miller, James Otis, Stripper blow out preventer for small diameter oil field tubing or small diameter polished rods.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Adjustable stuffing boxes for pump rods 원문보기