The? taper tap is a special fishing tool making thread on the inside wall of tube dropped objects such as drill pipe and oil tube, and the Die Collar is a special external fishing tool which is engaged on the outside wall of tubing objects such as oil tubing and drill pipe. They are made with chip groove so as to make threads easily. The taper tap and Die collar are made up of high quality alloy steel and processed by special heat treatment, having the advantages of high strength, high toughness and easy tapping.
Tap Tapers
Die Collars
Taper tap specifications:
Type
Connection API
OAL mm(inch)
Fishing ID Range
mm
inch
GZ-NC31-LH-1
NC31-LH
1607.3(63 9/32)
39-53
1 17/32-2 3/32
GZ-NC31-2
NC31
577 (22 23/32)
56-60
2 13/64-2 23/64
GZ-NC38-7
NC38
860 (33 55/64)
84-106
5/16-4 11/64
GZ-NC38-8
NC38
860 (33 55/64)
119-141
4 11/16-5 35/64
GZ-NC38-9
NC38
950 (37 13/32)
97-125
3 13/16-4 59/64
GZ-NC38-10
NC38
710 (27 61/64)
87-100
3 27/64-3 15/16
GZ-NC50-11
NC50
1130 (44 31/64)
82.5-121
3 1/4-4 49/64
GZ-NC50-12
NC50
930 (36 5/8)
69.9-95.3
2 3/4-3 3/4
Die Collar Specifications:
Type
Connection API
OAL mm(inch)
Fishing ID Range
mm
inch
MZ-2 3/8 REG-2
2 3/8 REG
550 (21 21/32)
73-80
2 7/8-3 5/32
MZ-3 1/2 REG-2
3 1/2 REG
600 (23 5/8)
89-100
3 1/2-3 15/16
MZ-NC31-LH-1
NC31LH
880 (34 41/64)
55-85
2 11/64-3 11/32
MZ-NC38-1
NC38
1000 (39 3/8)
63.5-101.6
2 1/2-4
MZ-NC50-1
NC50
1050 (41 11/32)
150-185
5 29/32-7 9/32
Releasing and Circulating Overshot
The releasing and circulating overshot is the fishing tool which is simple, high strength and high reliability and fishing from outside of fishing objects.? ?
The internal catch mechanisms have two basic types: a basket grapple and a spiral grapple. According to different uses, it may be equipped with accessories, such as extension sub, wall hook, oversize guide, etc.
? When ordering or requesting quotation, please specify:
1. Type of overshot;
2. O.D. of fishing objects to be caught;
3. Size and type of top connection;
4. If size other than standards, please specify clearly.