Junk Sub

Product Detail

Junk Sub

Technical Features

During drilling process, drilling fishing cup is applied mainly for fishing of shivers and fallen objects such as carbide tooth, drill bit and bearing which can not be carried out of hole by conventional fluid circulation, etc. It possesses important functions to keep hole toe cleaning, increase bit service life, reduce and prevent drill bit from unexpected damage.

Structure

Due to the fact that the O.D. of external bowl of fishing cup is bigger and a smaller circular space is available between external bowl of fishing cup and well hole; the mandrel diameter at cup mouth is larger so that it has a bigger annular space, therefore, the fluid at the cup mouth form a swirls and suddenly fall down so as to reduce the carrying capacity. By this way, some heavy objects will drop in cup and be fished out so that the purpose of cleaning of hole toe is carried out.

Technical parameters

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 3/8REG B*P	19	250	845	88.9-98.4	L14-7900
LB94	94*79	2 3/8REG B*P	19	250	850	108-117.5	L14-9400
LB102	102*93	2 7/8REG B*P	31.8	250	850	117.5-124	L14-10200
LB127	127*108	3 1/2REG B*P	38.1	250	915	152.4-162	L14-12710
LB133	133*121	3 1/2REG B*NC38 B	38.1	250	775	152.4-162	L14-13300
LB133	133*121	NC38 P*B	38.1	250	875	152.4-162	L14-13330
LB140	140*121	3 1/2REG B*NC38 B	38.1	250	775	165-190.5	L14-14000
LB140	140*108	3 1/2REG 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
LB168	168*146	4 1/2REG B*B	57.2	250	915	190.5-216	L14-16800
LB178	178*159	4 1/2REG B*NC46 B	57.2	250	915	219-244.5	L14-17820
LB178	178*146	4 1/2REG 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 1/2REG B*NC50 P	71.4	250	950	229-273	L14-19400
LB219	219*178	6 5/8REG B*NC50 B	76.2	250	915	244-289	L14-21900
LB241	241*203	6 5/8REG B*P	76.2	250	950	292-330	L14-24100
LB273	273*203	6 5/8REG B*P	76.2	250	945	330-375	L14-27300
LB327	327*241	7 5/8REG P*B	76.2	250	1040	375-444.5	L14-32720