Oil Well Cone Drill Pipe Casing and Tubing Recovery Taper Tap for Oilfield Drilling Rig Petroleum Equipment Machine Spare Parts Assembly Downhole Fishing Tool

Product Description

Taper Tap Fishing Tool

SGPE manufactures and supplies Taper Tap Fishing Tools for oil and gas drilling, workover, well servicing and downhole fishing operations. Also known as an Oilfield Taper Tap, Fishing Taper Tap or Internal Fishing Tap, the tool is designed to retrieve hollow tubular fish by engaging the inside bore of the dropped, broken or stuck component. Typical targets include drill pipe, production tubing, casing sections, couplings, box connections, wash pipe and other tubular objects that provide a suitable internal catching surface.

Unlike an overshot or die collar that engages the outside of a fish, the Taper Tap is an internal catch fishing tool. During operation, the tapered cutting section enters the fish bore and progressively cuts threads into the inner wall as controlled weight and rotation are applied. As the tool advances, the tapered profile increases mechanical engagement and creates a strong connection between the taper tap and the fish. Once securely engaged, the fishing string can apply pulling force, rotation, jarring action or controlled back-off torque according to the recovery program.

Item	Specification
Product Name	Taper Tap
Alternative Name	Taper Tap Fishing Tool / Internal Fishing Tap
Tool Type	Internal Catch Fishing Tool
Application	Tubing / Drill Pipe / Casing Fishing
Catching Method	Internal Thread Cutting
Material	High-Strength Alloy Steel
Cutting Section	Hardened Tapered Wicker Threads
Flutes	Available
Thread Direction	RH / LH
Common Connections	NC26 / NC31 / NC38 / NC50
Larger Connections	6-5/8 REG / 7-5/8 REG
Fishing Range	Model-Specific / Custom
Tool OD	Model-Specific
Tool ID	Model-Specific
Circulation Bore	Available
Heat Treatment	Controlled
Custom Fish ID Range	Available
Custom Connection	Available
Replacement Matching	Available
Brand	SGPE
Origin	China

SGPE Taper Taps are manufactured from high-strength alloy steel and undergo controlled heat treatment to provide the strength, toughness and wear resistance required for demanding downhole recovery operations. The tapered cutting section incorporates hardened cutting or wicker threads designed to bite into the fish ID. Chip-discharge grooves or flutes can be machined into the cutting area to help remove metal cuttings during thread formation, reduce cutting resistance and improve engagement reliability.

Both right-hand and left-hand Taper Tap configurations are available. Right-hand designs can be used for conventional fishing operations with right-hand work strings, while left-hand configurations may be selected for jobs involving left-hand drill pipe, back-off procedures or specialized recovery programs. Thread direction must therefore be confirmed before manufacturing or tool selection.

Parameter	Typical Specification
Main Body	High-Strength Alloy Steel
Manufacturing	Forging / Machining
Heat Treatment	Controlled
Cutting Threads	Hardened
Main Requirement	Strength + Toughness + Wear Resistance
Tool Body	One-Piece / Design-Specific
Connection	Machined
Cutting Section	Precision Machined
Traceability	Available
Custom Material	Project-Specific

Top connections can include common NC and REG connections, together with project-specific or customized interfaces according to the fishing string. Typical NC connection requirements may include NC26, NC31, NC38, NC50 and other sizes depending on tool body diameter and fishing application. However, the correct Taper Tap cannot be selected from the top connection alone. The actual fish ID, fish OD, fish type, fish-top condition, required catching range and wellbore restrictions are more important selection parameters.

Different Taper Tap models can be supplied for drill pipe fishing, tubing recovery, casing retrieval and coupling recovery. The catching section should be selected so that the smaller end can enter the available fish bore while sufficient tapered thread engagement remains to develop the required mechanical grip. For non-standard or damaged fish, SGPE can manufacture customized taper taps according to field measurements, fishing drawings or recovered samples.

Tubing Size	Typical SGPE Taper Tap Reference
1.9" Tubing	GZ47×28-NC26
2-3/8" Tubing	GZ60×38-NC26
2-7/8" Tubing	GZ70×45-NC26
3-1/2" Tubing	GZ86×56-NC31
4" Tubing	GZ98×65-NC38
4-1/2" Tubing	GZ110×77-NC50
Other Tubing	Custom Size Available

The tool can also be designed with a central circulation bore where circulation is required during fishing. Circulation may help clean debris, remove cuttings from the fishing area or support well-control procedures, depending on the actual operation. Bore size, tool OD and circulation requirement should be confirmed during technical selection.

Typical applications include broken drill pipe recovery, dropped tubing retrieval, casing fishing, coupling recovery, stuck tubular retrieval, workover fishing, well repair and emergency wellbore intervention. Taper Taps can also be used together with jars, bumper subs, drill collars and other fishing-string components when additional impact or pulling force is required.

Quality control can include raw-material verification, heat-treatment control, dimensional inspection, hardness testing, thread inspection, connection gauging, NDT and final visual inspection according to the ordered scope. Tool identification and traceability can be supplied according to project requirements.

Drill Pipe Size	Typical SGPE Taper Tap Reference
2-3/8" Drill Pipe	GZ62×40-NC26
2-7/8" Drill Pipe	GZ62×40-NC26
3-1/2" Drill Pipe	GZ85×60-NC31
4" Drill Pipe	GZ109×79-NC50
4-1/2" Drill Pipe	GZ109×79-NC50
5" Drill Pipe	GZ130×95-NC50
5-1/2" Drill Pipe	GZ130×95-NC50
6-5/8" Drill Pipe	GZ160×145-NC50

For replacement or urgent fishing jobs, customers should provide as much information as possible about the downhole fish. Recommended RFQ data include the fish type, fish OD, minimum and maximum fish ID, fish-top condition, estimated fishing depth, wellbore or casing ID, required catching range, top connection, right-hand or left-hand direction, circulation requirement, required tool OD, overall length, quantity and available fishing drawings or field photographs.

SGPE can then select or manufacture the appropriate Taper Tap Internal Catch Fishing Tool for the specific drill pipe, tubing, casing or tubular recovery operation.

Casing Size	Typical SGPE Taper Tap Reference
4-1/2" Casing	GZ122×92-NC50
5" Casing	GZ122×92-NC50
5-1/2" Casing	GZ135×109-NC50
6-5/8" Casing	GZ162×137-NC50
7" Casing	GZ172×147-6-5/8 REG
7-5/8" Casing	GZ187×161-6-5/8 REG
7-3/4" Casing	GZ187×161-6-5/8 REG
8-5/8" Casing	GZ215×185-7-5/8 REG
9-5/8" Casing	GZ237×211-7-5/8 REG

 

 

 

Taper Tap Specification
Type	Connection	Total Length (mm)	Fishing ID range (mm)
GZ-NC31-LH-1	NC31 LH	1607.5	39-53
GZ-NC31-1	NC31	1145	45-85
GZ-NC31-2	NC31	577	56-60
GZ-NC38-6(Z)	NC38	550	50.8
GZ-NC38-7	NC38	860	84-106
GZ-NC38-8	NC38	860	119-141
GZ-NC38-9	NC38	950	97-125
GZ-NC-10	NC38	710	87-100
GZ-NC50-10(Z)	NC50	860	65-88
GZ-NC50-11	NC50	1130	82.5-121
GZ-NC50-12	NC50	930	69.9-95.3
GZ-41/2'' FH-1(Z)	41/2"FH	850	65-86
Die Collar Specification
Type	Connection	Catch Size (mm)
MZ-NC26	NC26	41~52
MZ-NC26	NC26	50~68
MZ-NC26	NC26	62~80
MZ-NC31	NC31	69~73
MZ-NC31	NC31	71~82
MZ-NC31	NC31	76~95
MZ-NC38	NC38	86~108
MZ-NC38	NC38	95~118
MZ-NC50	NC50	110~135
MZ-4 1/2FH	4 1/2FH	114
MZ-5 1/2FH	5 1/2FH	141
MZ-6 5/8REG	6 5/8REG	168