Source: http://www.google.com/patents/US4884643?dq=5,381,459
Timestamp: 2016-02-11 11:57:09
Document Index: 36350006

Matched Legal Cases: ['art 24', 'art 16', 'art 16', 'art 16', 'art 24', 'art 30', 'art 24', 'art 16', 'art 14', 'art 30', 'art 14', 'art 30']

Patent US4884643 - Downhole adjustable bent sub - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA downhole adjustable bent sub is provided for use in a drilling process in which a drill bit is subjected to a drilling force. The bent sub has a tubular housing and a tubular mandrel. The tubular housing has a bend along its length to define an upper part and a lower part, the respective longitudinal...http://www.google.com/patents/US4884643?utm_source=gb-gplus-sharePatent US4884643 - Downhole adjustable bent subAdvanced Patent SearchPublication numberUS4884643 APublication typeGrantApplication numberUS 07/297,360Publication dateDec 5, 1989Filing dateJan 17, 1989Priority dateJan 17, 1989Fee statusLapsedPublication number07297360, 297360, US 4884643 A, US 4884643A, US-A-4884643, US4884643 A, US4884643AInventorsMike Wawrzynowski, Don RuckmanOriginal Assignee392534 Alberta Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (14), Referenced by (23), Classifications (9), Legal Events (7) External Links: USPTO, USPTO Assignment, EspacenetDownhole adjustable bent sub
The first part 24 of the mandrel 26 is longitudinally slidable within the lower part 16 of the housing 12. The adjustable bent sub 10 is provided with a rotator which will be described in more detail below. The rotator causes the first part of the mandrel 24 to rotate within the lower part 16 of the housing 12. This rotation is about a common axis coincident with the lower longitudinal axis 20 of the lower part 16 of the housing 12 and the first longitudinal axis 28 of the first part 24 of the mandrel 26. The upper longitudinal axis 18 of the housing 12 intersects this common axis at the first bend 22. The second longitudinal axis 32 of the second part 30 of the mandrel 26 intersects the common axis at an angle at the second bend 34. It will be appreciated therefore that as the first part 24 of the mandrel 26 is rotated within the lower part 16 of the housing 12, the angular relationship between the upper part 14 of the housing 12 and the second part 30 of the mandrel 26 will vary. This can be seen by referring to FIGS. 1 and 2 in which the mandrel and the housing are shown rotated 180� relative to each other.
The offset angles of the first and second bends, 22 and 34 respectively, in FIGS. 1 and 2 are shown as both being the same. In FIG. 1 the offset angles cancel each other and accordingly the upper longitudinal axis 18 of the upper part 14 of the housing 12 is parallel to the second longitudinal axis 32 of the second part 30 of the mandrel 26. In FIG. 2 these angles are additive and the angle defined between the upper longitudinal axis 18 and the second longitudinal axis 32 would be twice the offset angle. As the mandrel 26 and housing 12 are rotated relative to each other, the upper longitudinal axis 18 and the second longitudinal axis 32 would vary from being parallel, as in FIG. 1, to a maximum angle of intersection upon 180� of relative rotation, as shown in FIG. 2. Further rotation would cause the angle between the upper longitudinal axis 18 and the second longitudinal axis 32 to decrease until these axes were once again parallel at 360� of relative rotation.
Any desired offset angle can be used. It is not necessary for the offset angles of the first and second bends, 22 and 34 respectively, to be the same. If the offset angles however are not the same, it will not be possible to use the adjustable bent sub 10 for drilling in a vertical direction. The offset angles would typically be in the order of 1� to 2�.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3586116 *Apr 1, 1969Jun 22, 1971Turboservice SaDirectional drilling equipmentUS3811519 *Jan 4, 1973May 21, 1974Driver WRemote control directional drilling systemUS4067404 *May 4, 1976Jan 10, 1978Smith International, Inc.Angle adjustment subUS4077657 *Mar 22, 1976Mar 7, 1978Smith, International, Inc.Adjustable bent subUS4220214 *Aug 18, 1977Sep 2, 1980Benoit Lloyd FDirectional drilling subUS4240512 *Feb 26, 1979Dec 23, 1980Haglund Mats TArrangement for guiding a bore-crown or bit along a given pathUS4286676 *Jul 24, 1979Sep 1, 1981Institut Francais Du PetroleCrank connector for directional drillingUS4303135 *May 21, 1979Dec 1, 1981Benoit Lloyd FDirectional drilling subUS4343369 *Sep 19, 1980Aug 10, 1982Drilling Development, Inc.Apparatus for drilling straight portion of a deviated holeUS4596294 *Apr 16, 1982Jun 24, 1986Russell Larry RSurface control bent sub for directional drilling of petroleum wellsUS4629012 *Jul 8, 1985Dec 16, 1986Atlantic Richfield CompanyDrainhole drilling assemblyUS4641717 *Dec 27, 1985Feb 10, 1987Hughes Tool CompanyConnector housingUS4739842 *Sep 17, 1986Apr 26, 1988Eastman Christensen CompanyApparatus for optional straight or directional drilling underground formationsUS4745982 *Nov 28, 1986May 24, 1988Wenzel Kenneth HAdjustable bent sub* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5048621 *Aug 10, 1990Sep 17, 1991Masx Energy Services Group, Inc.Adjustable bent housing for controlled directional drillingUS5094305 *Dec 13, 1990Mar 10, 1992Kenneth H. Wenzel Oilfied Consulting Inc.Orientatable adjustable bent subUS5117927 *Feb 1, 1991Jun 2, 1992AnadrillDownhole adjustable bent assembliesUS5154243 *Jul 26, 1991Oct 13, 1992Dudman Roy LBent subUS5215151 *Sep 26, 1991Jun 1, 1993Cudd Pressure Control, Inc.Method and apparatus for drilling bore holes under pressureUS5269385 *Mar 15, 1993Dec 14, 1993Canadian Fracmaster Ltd.Adjustable bent housing IIUS5445230 *Oct 1, 1993Aug 29, 1995Wattenburg; Willard H.Downhole drilling subassembly and method for sameUS5673765 *Aug 29, 1995Oct 7, 1997Wattenburg; Willard H.Downhole drilling subassembly and method for sameUS6073707 *Apr 9, 1998Jun 13, 2000Canadian Downhole Drill Systems Inc.Downhole sub with kick pad for directional drillingUS6502641May 19, 2000Jan 7, 2003Precision Drilling CorporationCoiled tubing drilling rigUS6536539Jun 29, 2001Mar 25, 2003S & S TrustShallow depth, coiled tubing horizontal drilling systemUS6880649 *Jun 10, 2004Apr 19, 2005William George EdscerApparatus and method for directional drilling of holesUS8544560 *Nov 3, 2009Oct 1, 2013Schlumberger Technology CorporationDrive mechanismUS20040222024 *Jun 10, 2004Nov 11, 2004Edscer William GeorgeApparatus and method for directional drilling of holesUS20080142268 *Dec 13, 2006Jun 19, 2008Geoffrey DowntonRotary steerable drilling apparatus and methodUS20100065333 *Mar 18, 2010Harmonic Drive Systems Inc.Drill bit shaft structure for excavation apparatusUS20110100640 *May 5, 2011Schlumberger Technology CorporationDrive mechanismUSRE36556 *May 17, 1995Feb 8, 2000Cudd Pressure Control, Inc.Method and apparatus for drilling bore holes under pressureUSRE39970Apr 14, 2004Jan 1, 2008Schlumberger Technology CorporationDownhole adjustable bent housing for directional drillingEP0465072A2 *Jun 24, 1991Jan 8, 1992Canadian Fracmaster LtdAdjustable bent subEP0497421A1 *Jan 28, 1992Aug 5, 1992Anadrill International SADownhole adjustable bent assembliesWO1993006331A1 *Sep 25, 1992Apr 1, 1993Cudd Pressure Control IncWell drilling pressure control method and apparatusWO2015099652A1 *Dec 23, 2013Jul 2, 2015Halliburton Energy Services Inc.Surface actuated downhole adjustable mud motor* Cited by examinerClassifications U.S. Classification175/74, 166/237, 175/75, 175/325.2, 175/322International ClassificationE21B7/08, E21B7/06Cooperative ClassificationE21B7/067European ClassificationE21B7/06KLegal EventsDateCodeEventDescriptionJan 17, 1989ASAssignmentOwner name: 392534 ALBERTA LTD., ALBERTAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:WAWRZYNOWSKI, MIKE;RUCKMAN, DON;REEL/FRAME:005022/0372Effective date: 19890112Jun 4, 1993FPAYFee paymentYear of fee payment: 4Nov 1, 1993ASAssignmentOwner name: CANADIAN FRACMASTER (OFFSHORE) LTD., CANADAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:392534 ALBERTA LTD.;REEL/FRAME:006744/0068Effective date: 19900725Sep 30, 1994ASAssignmentOwner name: ZEELAND HORIZONTAL LTD.Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CANADIAN FRACMASTER (OFFSHORE) LTD.;REEL/FRAME:007154/0703Effective date: 19940908Jul 15, 1997REMIMaintenance fee reminder mailedDec 7, 1997LAPSLapse for failure to pay maintenance feesFeb 17, 1998FPExpired due to failure to pay maintenance feeEffective date: 19971210RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services