Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A fluid actuated breakout mechanism operable for loosening a threaded joint between a rotatable drill member and a drill string section from an initially tight condition; said breakout mechanism including a fluid actuated jaw assembly having drill string section engaging jaws and drill member engaging jaws; a reversible fluid actuated rotary motor providing torque for rotating said drill member to connect and disconnect said joint; and fluid control means responsive to operation of said breakout mechanism to limit the joint connecting torque output of said motor to a level less than its joint disconnecting torque output.
Claim 2
Dependent Claim
96 words
A fluid actuated breakout mechanism operable for loosening a threaded joint between a rotatable drill member and a drill string section from an initially tight condition; said breakout mechanism including a fluid actuated jaw assembly having drill string section engaging jaws and drill member engaging jaws; a reversible fluid actuated rotary motor providing torque for rotating said drill member to connect and disconnect said joint; and fluid control means responsive to operation of said breakout mechanism to limit the joint connecting torque output of said motor to a level less than its joint disconnecting torque output.
Claim 3
Dependent Claim
46 words
The invention defined in claim 1, wheRein: said breakout mechanism includes a fluid actuated jaw assembly operable to engage said drill string section; and said fluid control means includes a bypass connectable in circuit with said motor when said drill string section engaging jaws are engaged.
Claim 4
Dependent Claim
43 words
The invention defined in claim 2, wherein: said fluid control means includes fluid actuated valve means operable to connect said bypass; and said valve means and said drill string section engaging jaws are connected to a common fluid supply valve for simultaneous operation.
Claim 5
Dependent Claim
107 words
Threadably joinable drill string sections each having external splines formed adjacent opposite ends thereof and a breakout mechanism for loosening threaded joints between sections of a drill string, comprising: upper and lower gripping means; said upper gripping means being rotatable with respect to said lower gripping means; a bore extending through said gripping means for receiving the splined adjacent ends of two joined sections; jaw means having plural teeth formed thereon and housed in said gripping means; and said jaw means being operable for movement relative to said gripping means into said bore to effect interengagement of said teeth with the splined ends of said joined sections.
Claim 6
Dependent Claim
107 words
Threadably joinable drill string sections each having external splines formed adjacent opposite ends thereof and a breakout mechanism for loosening threaded joints between sections of a drill string, comprising: upper and lower gripping means; said upper gripping means being rotatable with respect to said lower gripping means; a bore extending through said gripping means for receiving the splined adjacent ends of two joined sections; jaw means having plural teeth formed thereon and housed in said gripping means; and said jaw means being operable for movement relative to said gripping means into said bore to effect interengagement of said teeth with the splined ends of said joined sections.
Claim 7
Dependent Claim
27 words
The invention defined in claim 4, wherein: said jaw means comprise fluid actuated pistons radially disposed about said bore in cylinder bores interconnected by fluid passage means.
Claim 8
Dependent Claim
80 words
The invention defined in claim 4, together with: fluid actuated means for operating the jaw means of said upper gripping means; fluid actuated cylinder means having a cylinder body connected to said lower gripping means and an extendable piston rod connected to said upper gripping means; and fluid control means in circuit with said jaw means of said upper gripping means and said cylinder means for sequentially operating said jaw means of the upper gripping and then said cylinder means.
Claim 9
Dependent Claim
25 words
The invention defined in claim 4, wherein: said teeth have sloping walls which when extended would intersect to define an included angle of 60* .
Claim 10
Dependent Claim
17 words
The invention defined in claim 4, wherein: said teeth are spaced apart by at least .125 inch.
Claim 11
Dependent Claim
28 words
The invention defined in claim 4, together with: annular bushings removably attached to the upper and lower gripping means and disposed adjacent the opposite openings of said bore.
Claim 12
Dependent Claim
21 words
The invention defined in claim 9, wherein: the inside diameter of said bushings are smaller than the diameter of said bore.
Claim 13
Dependent Claim
30 words
The invention defined in claim 4, together with: means for moving said upper and lower gripping means along the entire length of a drill string section received in said bore.