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| Number | Title | Issue Date |
| 8066062 | Seal for a drill string Sealing arrangement for dynamic sealing around a drill stem (16) or a coiled tubing is described, comprising an elongated, dynamic sealing unit (10) which is arranged to surround the drill stem (16), in that the sealing unit (10) comprise... | 11/29/2011 |
| 7934545 | Rotating control head leak detection systems A system and method to detect leaks in the rotating control head and a latching system to latch the rotating control head to a housing is disclosed. ... | 05/03/2011 |
| 7836946 | Rotating control head radial seal protection and leak detection systems A system and method for reducing wear to radial seals in a rotating control device. The seals may be cooled by a thermal transfer fluid circulating through a passageway making more than one pass. Also, the differential pressure between multiple seals may be regulate... | 11/23/2010 |
| 7343969 | Secondary packing arrangement for reciprocating pump polished rod A secondary packing arrangement is provided for use with a well having a reciprocating pump and polished rod, and in combination with a stuffing box, the stuffing box being modified. Packing seals, a barrier fluid and a pressure transmitter cooperate with modified s... | 03/18/2008 |
| 7175176 | Device for feeding suction air or blowing air in a sheet-processing machine A device for feeding suction air or blowing air to a sheet-retaining device displaceable relative to a machine element in a sheet-processing machine, includes a first air-feeding element connectible in terms of flow to a suction-air or blowing-air source. A second a... | 02/13/2007 |
| 7108058 | Packing assembly for rotary drilling swivels and pumps having rotating shafts A packing assembly for use with a rotary drilling swivel having a cylindrical wash pipe comprising a housing assembly including a packing gland forming a sealing assembly chamber around the wash pipe, the packing gland including an injection port in open communicati... | 09/19/2006 |
| 7055593 | Well stuffing box packing Disclosed herein are apparatus and methods for sealing a well stuffing box. ... | 06/06/2006 |
| 7040394 | Active/passive seal rotating control head The present invention generally relates to an apparatus and method for sealing a tubular string. In one aspect, a drilling system is provided. The drilling system includes a rotating control head for sealing the tubular string while permitting axial movement of the ... | 05/09/2006 |
| 6968894 | Coiled tubing injector apparatus A coiled tubing injector apparatus for use in inserting coiled tubing into a well, temporarily suspending the coiled tubing, and removing the coiled tubing from the well is described. The apparatus includes a base with a pair of spaced-apart carriages extending upwa... | 11/29/2005 |
| 6520253 | Rotating drilling head system with static seals A rotatable head assembly wherein there is an outer housing that carries a cartridge assembly that permits rotational movement. The cartridge assembly made up of a cartridge housing and cartridge body that is rotatable within the cartridge housing. Static... | 02/18/2003 |
| 6510900 | Seal assembly for dual string coil tubing injection and method of use A seal assembly for dual string coil tubing injection into a subterranean well includes a seal plate having first and second bores with annular seals for providing a high-pressure fluid seal around first and second coil tubing strings inserted through the... | 01/28/2003 |
| 6167959 | Adjustable stuffing boxes for pump rods 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... | 01/02/2001 |
| 5960876 | Wellhead equipment that use polymer sealing elements to seal off well pressure Wellhead equipment includes a body having a drilling conduit passage, whereby drilling conduit is passed through the body. Polymer sealing elements are disposed within the body and disposed in relation to the passage to seal off well pressure. A circulati... | 10/05/1999 |
| 5944099 | Infuser for composite spoolable pipe In the use of composite materials for a coiled tubing for downhole use, precise external tubular dimension and durable wear surface become a critical factor because of the potential for damage to the external surface as the tubing passes through the strip... | 08/31/1999 |
| 5865245 | Stuffing box gland A stuffing box gland 20 that cooperates with packing 38 positioned within a stuffing box 18 to seal between a stuffing box housing 42 and a moveable polished rod 27 of an oilfield pump assembly 10. A lower end of a gland housing 46 forms a flange 50 exten... | 02/02/1999 |
| 5549156 | Shock absorber & Wiper A safety shock absorber and wiper for use in an oil well pumping unit and attached to the top of a stuffing box. The shock absorber and wiper is constructed of a high density elastomeric material which is designed to absorb the shock created in the event ... | 08/27/1996 |
| 5538080 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor a... | 07/23/1996 |
| 5435385 | Integrated wellhead tubing string In one form of the invention, an integrated wellhead tubing string (100) having a reduced overall height is disclosed, comprising an integrated casing (104) having a first vertical bore (110) therethrough having a first inside diameter, a second vertical ... | 07/25/1995 |
| 5398944 | Sealing system for reciprocating rod The stuffing box of the present invention includes a seal housing surrounding the polished rod. A V-ring set is mounted in sealing contact with the polished rod, and concentrically surrounds the polished rod within the seal housing. A compression ring is ... | 03/21/1995 |
| 5217068 | Stuffing box An improvement in a stuffing box for a rotary polished rod having a tubular housing with first and second rod guides disposed at each end and packing elements therebetween. The lower rod guide is in the form of an annular bushing, and annular interior sea... | 06/08/1993 |
| 5137083 | Wellhead stuffing box for polished rod and accessories for same A wellhead stuffing box for a polished rod includes a body with an elongated opening extending through it to receive the polished rod. Packing in the body makes a sliding seal around the polished rod and a static seal against the interior of the body. Int... | 08/11/1992 |
| 5067563 | Spillproof oil well seal A spillproof sealing system for hydrocarbon-producing wells which produce gas and crude oil is provided. The sealing system includes a liquid sealing element which cooperates with a gas sealing component positioned about the well polished rod to seal the ... | 11/26/1991 |
| 4981174 | Leakproof stuffing box with external lubrication for polish rod A stuffing box for an oil well pump which utilizes a separate lubricating fluid chamber for the polish rod rather than using the crude oil that is being pumped as the lubricating fluid.... | 01/01/1991 |
| 4951745 | Stuffing box and grease injector for underwater wells An hydraulically actuated stuffing box for use on a lubricator assembly or a grease injector section to seal around flexible line run through the lubricator assembly into an underwater well. The stuffing box has a piston on which control fluid acts, compr... | 08/28/1990 |
| 4872508 | Oil well pump leakage accumulator An accumulator to be mounted in conjunction with an oil well pump which has a reciprocating polish rod. The polish rod is mounted in conjunction with the stuffing box of the oil well pump. The accumulator is attached to and sealed relative to the ambient ... | 10/10/1989 |
| 4821799 | Grease injection control system A system for sealing around a wireline run into or pulled from wells includes a grease control head with a line wiper mounted on the well head and a grease injection control system. The grease injection control system supplies grease continuously at a con... | 04/18/1989 |
| 4718487 | Auxiliary well pressure packoff assembly An auxiliary well pressure packoff assembly for wireline control valves is positionable within the downstream passage of a wireline valve body without requiring cutting of the wireline and receives the wireline in surrounded, sealed relation. A retainer c... | 01/12/1988 |
| 4697639 | Blow-out protector and fire control system for petroleum exploration A blow-out protector and fire control system is located in a rotating Kelly flange assembly and flange housing. The blow-out protector is based upon compressing a rubber Kelly bushing and seal positioned around a rotating Kelly by upward movement of a cat... | 10/06/1987 |
| 4647050 | Stuffing box for a sucker rod pump assembly A stuffing box for a sucker rod pump assembly is disclosed that utilizes natural convection currents generated in a lubricating fluid reservoir mounted on the housing of the stuffing box and in fluid communication with the interior of the housing to conti... | 03/03/1987 |
| 4530397 | Oil saving apparatus for use with well pump polish rod Apparatus is disclosed for conserving oil which may leak from the stuffing box of an oil well pump polish rod by passage past the polish rod when the stuffing box packing wears or dries out. The apparatus comprises a housing attached to a stuffing box sur... | 07/23/1985 |
| 4476924 | Grease injection control head having a specific gas trap A grease injection control head for maintaining a seal about a wire performing wireline operations in a well. A tubular body includes a grease injection port for injecting grease for counteracting pressure in the well with a vent port above the injection ... | 10/16/1984 |
| 4326584 | Kelly packing and stripper seal protection element A stripper seal protection and operating tool sealing element and method for protecting stripper seals during drilling operations with operating tools having both polygonal and circular cross sections. The stripper seal protection and operating tool seali... | 04/27/1982 |
| 3939910 | Stuffing box and blow out preventing device for polish rods of oil well pumping units A cylindrical tube with a screw threaded packing gland in the upper end carries an upper guide rubber with a plurality of packing rubbers stacked thereabove and engaged by the gland which applies the necessary pressure to seal the polish rod reciprocating... | 02/24/1976 |
