JUNK SUB

Junk Sub (Fishing Cup) is normally used to catch and remove junks that are too heavy to be circulated preventing them from settling at the bottom of the well-bore. Typical junks are shivers and fallen objects such as carbide tooth, drill bit and bearings which are too heavy to be removed from the well- hole through conventional fluid circulation. Junk Sub’s main function is to keep well bottom clean to increase bit service life, reduce and prevent drill bit from unexpected damage.

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Structure

As the outer diameter of the external bowl is bigger, the space between the external bowl and the well hole is reduced guiding most of the fluid through the cup. The mandrel diameter at the cup mouth is bigger with larger annular space. Thus, the fluid forms a swirl at the cup mouth as the fluid flows down through the cup with a sudden reduction in capacity at the bottom. Through this working principle, some heavy objects will drop in the cup and be fished out, ensuring that the well-bore bottom is cleaned.

Specifications - Junk Sub

Model	OD of lower end × OD of upper end (mm)	Bottom Conn. × Top Conn.	ID (mm)	L of cup (mm)	OAL (mm)	Hole size (mm)	Product Code
LB79	79×79	2 3/8 REG B*P	19	250	845	88.9-98.4	L14-7900
LB89	89*78	2 3/8 REG B*P	19	250	845	108-117.5	L14-8900
LB94	94*79	2 3/8 REG B*P	19	250	850	108-117.5	L14-9400
LB102	102*93	2 7/8 REG B*P	31.8	250	850	117.5-124	L14-10200
LB114	115*105	3 1/2 REG B*P	38.1	250	915	130-149	L14-11400
LB118	118*105	3 1/2 REG B*P	38.1	250	875	139.7-149	L14-11800
LB127	127*108	3 1/2 REG B*B	38.1	250	850	152.4-162	L14-12700
LB127	127*108	3 1/2 REG B*P	38.1	250	915	152.4-162	L14-12710
LB133	133*121	3 1/2 REG B*NC38 B	38.1	250	775	152.4-162	L14-13300
LB133	133*108	3 1/2 REG B*P	38.1	250	915	152.4-162	L14-13310
LB133	133*121	3 1/2 REG B*NC38 P	38.1	250	875	152.4-162	L14-13320
LB133	133*121	NC38 P*B	38.1	250	875	152.4-162	L14-13330
LB140	140*121	3 1/2 REG B*NC38 B	38.1	250	775	165-190.5	L14-14000
LB140	140*108	3 1/2 REG B*P	38.1	250	850	165-190.5	L14-14010
LB140	140*121	NC38 B*P	50.8	250	915	165-190.5	L14-14020
LB146	146*121	3 1/2 REG B*NC38 B	38.1	250	915	168-190.5	L14-14600
LB146	146*108	3 1/2 REG B*P	38.1	250	875	168-190.5	L14-14610
LB165	165*152	4 1/2 REG B*NC46 B	57.2	250	915	190.5-216	L14-16500
LB165	165*140	4 1/2 REG B*P	57.2	250	915	190.5-216	L14-16510
LB168	168*146	4 1/2 REG B*B	57.2	250	915	190.5-216	L14-16800
LB168	168*152	4 1/2 REG B*NC46 B	57.2	250	915	190.5-216	L14-16810
LB168	168*140	4 1/2 REG B*P	57.2	250	915	190.5-216	L14-16820
LB178	178*159	4 1/2 REG B*NC50 B	57.2	250	915	219-244.5	L14-17800
LB178	178*165	4 1/2 REG B*NC50 B	57.2	250	915	219-244.5	L14-17810
LB178	178*159	4 1/2 REG B*NC46 B	57.2	250	915	219-244.5	L14-17820
LB178	178*146	4 1/2 REG B*P	57.2	250	915	219-244.5	L14-17830
LB178	178*165	NC50 P*B	57.2	250	940	219-244.5	L14-17840
LB194	194*165	4 1/2 REG B*NC50 P	71.4	250	950	229-273	L14-19400
LB219	219*178	6 5/8 REG B*NC50 B	76.2	250	915	244-289	L14-21900
LB219	219*197	6 5/8 REG B*P	76.2	250	915	244-289	L14-21910
LB219	219*203	6 5/8 REG B*P	76.2	250	915	244-289	L14-21920
LB241	241*203	6 5/8 REG B*P	76.2	250	950	292-330	L14-24100
LB245	245*203	6 5/8 REG B*B	76.2	250	915	292-330	L14-24500
LB245	245*203	6 5/8 REG B*P	76.2	250	950	292-330	L14-24510
LB245	245*203	6 5/8 REG P*B	76.2	250	940	292-330	L14-24520
LB273	273*203	6 5/8 REG B*P	76.2	250	945	330-375	L14-27300
LB327	327*241	7 5/8 REG B*B	76.2	250	950	375-444.5	L14-32700
LB327	327*241	7 5/8 REG B*P	76.2	250	965	375-444.5	L14-32710
LB327	327*241	7 5/8 REG P*B	76.2	250	1040	375-444.5	L14-32720

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