China Hole Opening Tools for Drilling Rig

Fixed Diameter Hole Opener
Fixed Diameter Hole Opener is used for enlarging the surface hole which drilled by cone bit in advance, or connected above the cone bit. It applies to onshore and offshore oilfield.
Cutters type:
"SM": Soft to medium formation; "MH": Medium to hard formation; "XH": Hard formation.
Specification

ModelOpening SizeNumber
of
CuttersPilot Hole(Min.)Fishing NeckUpperLowerIDOALmm(inch)mm(inch)mm(inch)Conn.Conn.mm(inch)mm(inch)KZ3-216215.9(8 1/2)3165.1(6 1/2)120.7(4 3/4)NC383 1/2REG25.4(1)1524(60)KZ3-311311(12 1/4)3215.9(8 1/2)203.2(8)6 5/8REG4 1/2REG38.1(1 1/2)1524(60)KZ3-444444.5 (17 1/2)3266.7(10 1/2)241.3(9 1/2)7 5/8REG7 5/8REG57.2(2 1/4)1752(69)KZ3-584584(23)3355.6(14)241.3(9 1/2)7 5/8REG7 5/8REG76.2(3)1753(69)KZ3-660660.4(26)3444.5(17 1/2)241.3(9 1/2)7 5/8REG7 5/8REG76.2(3)1753(69)KZ3-813812.8(32)3444.5(17 1/2)241.3(9 1/2)7 5/8REG7 5/8REG76.2(3)1850(72 27/32)KZ3-914914.4(36)3609.6(24)241.3(9 1/2)7 5/8REG7 5/8REG76.2(3)1905(75)KZ4-914914.4(36)4444.5(17 1/2)241.3(9 1/2)7 5/8REG7 5/8REG89(3 1/2)2650(104 3/8)KZ4-813812.8(32)4444.5(17 1/2)241.3(9 1/2)7 5/8REG7 5/8REG76.2(3)2540(100)KZ6-10671066.8(42)6660.4(26)241.3(9 1/2)7 5/8REG7 5/8REG76.2(3)1955(77)

UR-I Under Reamer
UR-1 Under reamer is used for enlarging the hole size under the casings.
Specification

ModelReam Range (inch)ID mm(inch)Conn.OAL mm(inch)UR-I 241(5 7/8" - 9 1/2")38.1(1 1/2)3 1/2REG1369(54)UR-I 609(12"~24")71.4(2 13/16)6 5/8REG1977(78)

UR-II Drilling Type Variable Diameter Hole Openers
UR-II Drilling type variable diameter hole opener is a tool to enlarge the hole size in drilling operation, and save the trip times. It can expediently control the cutters to expand and shrink. It has the advantages of exquisite structure, convenient control and flexible action Features. According to different requirements, it could be adjusted to revelant diameter in maintenance workshop.
Specification

ModelReam Range (inch)ID mm(inch)Conn.OAL mm(inch)UR-II 184(8 1/4"~13")25.4(1")4 1/2REG2418(95)