Occupied 1600 square meters for warehouse; own more than 2500 sets of various fishing tools, including 8 national patent tools; able to support various workover operation.

Fishing tools
Jars
Cutting tools
Washing and milling tools
Casing repair tools

Drop back spear

Tool introduction

After enter into fish, slips of drop back spear sticks to inwall of fish under the pushing of spring. Then pull up to catch the fish tightly. While the stuck fish cannot be fish out, slacking down the string and pulling up again will release drop back spear.

Application scope

type	Diameter (mm)	nozzle (mm)	Connection	Length (mm)	Fish diameter (mm)	Max tension (KN)
TFLM73Ⅱ	95	12	2-7/8REG	835	62	360
TFLM89Ⅱ	105	15	NC31	897	76	440
TFLM102Ⅱ	121	30	NC38	915	88-90	580

Features

Applied in High-angle and Horizontal Wells for no need of rotate the string, easy to release from the fish and so can be used to try to fish.

In those wells, it is hard to meet the technology requirements to rotate the tube/D.P. string, but Drop back spear can complete fishing or releasing by pulling or landing without rotate the string.

Slip spear

Tool introduction

Slip spear is consisted of a rod and slips. The slips could slide alongside the guide way and then catch the fish from inside. COSL designed series of lengthen slip spear which can be 3 meters long to go through seal bore.

Application scope

Applied in wells varies in depth, fishing all types of tubing fish varies from 38mm to 102mm.

type	Diameter mm（in）	Connection	Fish size (mm)	Max tension (KN)
LM－D(S)60	86(3-3/8")	NC26	42~53.8	496
LM－D(S)73	105(4-1/8")	NC31	52.6~65	780
LM－D(S)89	105(4-1/8")	NC38	64~80	1000
LM－D(S)102	105(4-1/8")	NC38	77.6~92.1	1147
LM－D(S)114	105(4-1/8")	NC38	90~102.5	2245

Features

Go through disaccord tubing or distortion fish top to catch the under string.

Could be jar for a long time and back off the fish, but hard to release.

Slot overshot with/without windows

Tool introduction

Slot overshot is used for catch tubing or rod with shoulder or groove. If there is a need of circulation to washover and cleanup the top of fish, slot overshot without windows should be used. COSL modified it for many times to apply in horizontal wells and succeeded.

Application scope

Applied in wells varies in depth, fishing all types of tubing and rod.

NO.	Type	diameter (mm)	Casing applied in (mm)	NO.	Type	diameter (mm)	Casing applied in (mm)
1	KLT82-1	82	Φ114.30	4	KLT118	118	Φ168.30
2	KLT102-1	102	Φ139.72	5	KLT146	146	Φ177.80
3	KLT114-1	114	Φ139.72	6	KLT206	206	Φ224.50

Features

Tool bottom could be modified to different structure such as guide, washover shoe and catchall.

Applied to catch free fish with shoulders even some cables and ropes on top of it. No jarring or rotary permitted.

Off-center stabilizer

Tool introduction

Off-center stabilizer of COSL could be applied in two situations: fishing and back off. These two types of off-center stabilizer can lead the fishing tool run into the off-center fish and assure the execution of jarring and back off.

Application scope

Applied in 7"~9-5/8" casing, mainly in High-angle and Horizontal Wells in which the fish will be stay close to wellbore, and also applied in other kinds of off-center situations.

Features

Could be connected with regular drill pipes and tubing.

Two-way hydraulic jar

Tool introduction

Two-way hydraulic jar is a kind of holistic drilling jar, which could be jar upward and downward and good for unstuck.

Application scope

Applied in wells varies in depth, fishing all types of tubing and rod.

Type	Diameter (mm)	Max torque (kN•m)	Max tension (kN)	Max jarring force (kN)	Initial jarring force (kN)
YSZ121	121	1000	12	300	200
YSZ159Ⅱ	159	2500	14	600	350

Features

Could be jar upward and downward while fishing in according to well condition, make a bigger chance of unstuck the fish.

Minimize handling time while get stuck when milling, avoid well condition get worse.

Accelerator

Tool introduction

Accelerator is used for intensify jarring strength on the fish. Accelerator functions via silicon oil to generate acceleration and improve the pounding strength.

Application scope

Applied in wells varies in depth, fishing all types of tubing and rod.

Type	Diameter (mm)	Length (mm)	Max tension load (kN)	Max torque load (kN•m)
ZJQ46	121	7430	350	8
ZJQ62	159	7780	700	13
ZJQ64	165	7780	750	14
ZJQ76	197	7630	1000	18
ZJQ80	203	7752	1000	18
ZJQ95	241	6752	1200	22

Features

Use combined with hydraulic jar to intensify jarring strength on drill collar and jar, and then the strength passes to the fish. The strength on the fish will be doubled at least;

Decrease the force on drill pipe and surface equipment while jarring.

Type	Diameter （mm）	Nozzle （mm）	Connection API	Cutting range
Type	Diameter （mm）	Nozzle （mm）	Connection API	Min （in）	Max （in）
AND-S140	80	38	NC23	5-1/2"	9-5/8"
AND-S178	80	38	NC23 LH	7"	16"
AND-S245	114	71	NC38	9-5/8"	30"
AND-S273	140	71	NC38	10-3/4"	36"