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1. 发明授权

EP0939687B1 INTERLOCKING JAW POWER TONGS 失效
标题翻译：动力钳可锁定JAWS
公开(公告)号：EP0939687B1
公开(公告)日：2008-01-16
申请号：EP97912770.1
申请日：1997-10-10
申请人： Buck, David A.
发明人： Buck, David A.
IPC分类号： B25B13/50 , E21B19/16
CPC分类号： E21B19/164
摘要： The present invention provides an improved power tong (1) having a body (2) with a rotating assembly (6). The power tong (1) further has a plurality of jaw members (20, 21, 35) positioned within the rotating assembly (6) with two of the jaw members being pivoting jaws (20, 21) adapted to interlock when in a closed position. In an alternate embodiment, the improved power tong (1) will have a compensating jaw assembly (35, 37) to limit the axial load placed on the tubular member (13) being gripped.

2. 发明授权

EP0964773B1 JAW ASSEMBLY 失效
标题翻译： JAW装配
公开(公告)号：EP0964773B1
公开(公告)日：2005-06-01
申请号：EP98908685.5
申请日：1998-02-24
申请人： Buck, David A.
发明人： Buck, David A.
IPC分类号： B25B13/50 , B25B13/58
CPC分类号： E21B19/161
摘要： The present invention provides a jaw assembly (1) and die insert (3) for use in conventional power tongs (30), back-up tongs (34), and similar tools. The die insert (3) has a rear surface (20) having a plurality of splines (4) extending outwardly from the rear surface (20) and forming a plurality of grooves (5) between the splines (4). The die (3) also has a front surface adapted to grip a tubular member (60) and a keyway (7) formed on the rear surface (20). A mating jaw member (2) is provided which also has a front face (18) of splines (13) and grooves (14) with a keyway (16) which aligns with the die's keyway (7) when the die (3) is inserted into the jaw (2). A key (11) is inserted into this combined keyway to prevent vertical forces from drawing the die (3) out of the jaw member (2).
摘要翻译：本发明提供了用于传统动力钳（30），支撑钳（34）和类似工具的钳夹组件（1）和模具插入件（3）。模具插件（3）具有后表面（20），后表面（20）具有从后表面（20）向外延伸并在花键（4）之间形成多个凹槽（5）的多个花键（4）。模具（3）还具有适于夹持形成在后表面（20）上的管状构件（60）和键槽（7）的前表面。配备一个配合夹爪元件（2），它还具有带键槽（16）的花键（13）和槽（14）的前表面（18），当模具（3）为插入颚（2）中。钥匙（11）插入该组合键槽中以防止垂直力将模具（3）拉出钳口构件（2）。

3. 发明公开

EP0649360A1 RING GEAR CAMMING MEMBER 失效
标题翻译：齿圈CAM元。
公开(公告)号：EP0649360A1
公开(公告)日：1995-04-26
申请号：EP93917111.0
申请日：1993-07-01
申请人： BUCK, David, A.
发明人： BUCK, David, A.
IPC分类号： B25B13 , E21B19
CPC分类号： E21B19/164 , B25B13/44 , B25B13/5075
摘要： A camming member (50) for power tongs, comprising a ring-shaped body (52) including a central opening (54) formed therein, the body (50) being rotatable about a point (10) within the central opening. A slot (57) in the drive member (53) being alignable with a slot (56) in the body (52). The drive member (53) is rotatable independently of the body (52). A detent and stop mechanism (63) is provided for allowing the body (52) and the drive member (53) to partially rotate relative to one another to a desired engaged position and then to maintain the engaged position as the camming member rotates. The body has a first cam surface (79) curving inward toward the point (10), and a second cam surface (80) curving inward toward the point. At least a portion of the second cam surface (80) being axially aligned with and offset from the first cam surface (79).

4. 发明授权

EP1011927B1 LOW FRICTION POWER TONG JAW ASSEMBLY 失效
标题翻译： JAWS - 摩擦小FOR动力操作HEADS建设
公开(公告)号：EP1011927B1
公开(公告)日：2005-03-16
申请号：EP98923644.3
申请日：1998-05-22
申请人： Buck, David A. , Bangert, Daniel S
发明人： Buck, David A. , Bangert, Daniel S
IPC分类号： B25B13/50 , E21B19/16
CPC分类号： E21B19/164
摘要： The present invention provides an improved power tong jaw (20) having a jaw body (21) with a roller aperture (23) formed therein. A jaw roller (22) is positioned in the roller aperture (23) by some type of retaining surface (35), such as a roller pin (36). Additionally, a friction reducing surface (31) is formed between the jaw roller (22) and the jaw pin (36). In one embodiment, this friction reducing surface (31) comprises a plurality of needle bearings (26). In alternate embodiments, the friction reducing surface (31) comprises ball bearings (40), journal bearings (46, 47), or recirculating ball bearings (49).

5. 发明公开

EP1444157A2 SNUBBING UNIT WITH IMPROVED SLIP ASSEMBLY 有权
标题翻译：具有改进的滑动组件定向仪
公开(公告)号：EP1444157A2
公开(公告)日：2004-08-11
申请号：EP02800846.4
申请日：2002-09-24
申请人： Buck, David A.
发明人： Buck, David A.
IPC分类号： B65H59/10
CPC分类号： E21B19/10
摘要： An improved snubbing unit including a snubbing unit base (2), a lifting assembly (8) having a platform positioned above the base, a rotary table positioned on the snubbing unit, and a first slip assembly (1) positioned on the rotary table. The first slip assembly further includes a base plate with a center aperture formed therein, at least two separate slip frames (3) positioned on the base plate around the center aperture, wherein each of the slip frames includes a slip surface, and a die carrier (7) positioned within each of the slip frames, wherein each of the die carriers (7) also includes a surface (30) for engagement with the slip surfaces of said slip frames. Additionally, a second slip assembly will be positioned on the snubbing unit.

6. 发明公开

EP1011927A4 LOW FRICTION POWER TONG JAW ASSEMBLY 失效
标题翻译： JAWS - 摩擦小FOR动力操作HEADS建设
公开(公告)号：EP1011927A4
公开(公告)日：2003-06-25
申请号：EP98923644
申请日：1998-05-22
申请人： BUCK DAVID A , BANGERT DANIEL S
发明人： BUCK DAVID A , BANGERT DANIEL S
IPC分类号： E21B19/16 , B25B13/50
CPC分类号： E21B19/164
摘要： The present invention provides an improved power tong jaw (20) having a jaw body (21) with a roller aperture (23) formed therein. A jaw roller (22) is positioned in the roller aperture (23) by some type of retaining surface (35), such as a roller pin (36). Additionally, a friction reducing surface (31) is formed between the jaw roller (22) and the jaw pin (36). In one embodiment, this friction reducing surface (31) comprises a plurality of needle bearings (26). In alternate embodiments, the friction reducing surface (31) comprises ball bearings (40), journal bearings (46, 47), or recirculating ball bearings (49).

7. 发明公开

EP1264071A4 SNUBBING UNIT DRILLING SYSTEM 有权
标题翻译：钻探钻井压力下
公开(公告)号：EP1264071A4
公开(公告)日：2003-06-04
申请号：EP01907020
申请日：2001-02-05
申请人： BUCK DAVID A , BANGERT DANIEL S , ROGERS TOMMIE LOUIS
发明人： BUCK DAVID A , BANGERT DANIEL S , ROGERS TOMMIE LOUIS
IPC分类号： E21B19/00 , E21B19/16 , E21B19/18
CPC分类号： E21B19/16 , E21B19/00
摘要： A snubbing unit drilling system (1) that includes a power tong (2) and a hydraulically activated back-up tong (3). A mounting structure (20) having a rotating slip assembly (5) positioned on the mounting structure (20) such that the rotating slip assembly (5) rotates relative to said mounting structure (20). A plurality of support legs (16) are attached between the power tong (2), the back-up tong (3), and the mounting structure (20) such that the support legs (16) prevent relative rotation between the power tong (2) and the mounting structure (20).

8. 发明公开

EP0939687A4 INTERLOCKING JAW POWER TONGS 失效
标题翻译：动力钳可锁定JAWS
公开(公告)号：EP0939687A4
公开(公告)日：2003-03-12
申请号：EP97912770
申请日：1997-10-10
申请人： BUCK DAVID A
发明人： BUCK DAVID A
IPC分类号： B25B13/50 , E21B19/16
CPC分类号： E21B19/164
摘要： The present invention provides an improved power tong (1) having a body (2) with a rotating assembly (6). The power tong (1) further has a plurality of jaw members (20, 21, 35) positioned within the rotating assembly (6) with two of the jaw members being pivoting jaws (20, 21) adapted to interlock when in a closed position. In an alternate embodiment, the improved power tong (1) will have a compensating jaw assembly (35, 37) to limit the axial load placed on the tubular member (13) being gripped.

9. 发明公开

EP0862509A1 IMPROVED BACK-UP POWER TONGS 失效
标题翻译：驱动HOLD CLAMP
公开(公告)号：EP0862509A1
公开(公告)日：1998-09-09
申请号：EP96939477.0
申请日：1996-10-11
申请人： Buck, David A.
发明人： Buck, David A.
IPC分类号： B25B5 , E21B19
CPC分类号： B25B5/147 , E21B19/163
摘要： The present invention provides back-up power tongs (1) for holding a tubular member (2) against rotation of a connected tubular member. The back-up power tongs comprise a body (3) with a front section for receiving the tubular member and a plurality of jaw members (5, 7) for engaging the tubular member. The jaw members are positioned to form a substantially closed perimeter around the tubular member and at least one of the jaw members is a pivotal jaw (7), moving in a pivotal path to engage the tubular member. An alternate embodiment provides two pivoting jaws (107a, 107b) and a locking mechanism (100) attached to the end of the pivoting jaws such that the pivoting jaws can be securely interlocked. The improved back-up tongs should not require the tong body to virtually enclose the pipe and thus will allow the improved back-up tongs to be considerably smaller.

10. 发明公开

EP0649360A4 RING GEAR CAMMING MEMBER. 失效
标题翻译：齿圈CAM元。
公开(公告)号：EP0649360A4
公开(公告)日：1997-12-10
申请号：EP93917111
申请日：1993-07-01
申请人： BUCK DAVID A
发明人： BUCK DAVID A
IPC分类号： B25B13/44 , B25B13/50 , E21B19/16 , B25B21/00
CPC分类号： E21B19/164 , B25B13/44 , B25B13/5075
摘要： A camming member (50) for power tongs, comprising a ring-shaped body (52) including a central opening (54) formed therein, the body (50) being rotatable about a point (10) within the central opening. A slot (57) in the drive member (53) being alignable with a slot (56) in the body (52). The drive member (53) is rotatable independently of the body (52). A detent and stop mechanism (63) is provided for allowing the body (52) and the drive member (53) to partially rotate relative to one another to a desired engaged position and then to maintain the engaged position as the camming member rotates. The body has a first cam surface (79) curving inward toward the point (10), and a second cam surface (80) curving inward toward the point. At least a portion of the second cam surface (80) being axially aligned with and offset from the first cam surface (79).

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