Back pressure is location structure for valve

• Main Authors: LI PEIMEI, HE JINGBIN, CONG CHENG, YANG WENCHUAN, SUN PENG
• Format: Patent
• Language: English
• Published: 30.12.2015
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model provides a back pressure is location structure for valve, including the valve body, offered fluid passage along the axial of valve body, the case is installed to fluid passage's middle part inner wall, and the fluid passage of case upper end is that the longitudinal section is the stress dispersion toper section that the length trapezoidal and upper base is greater than the length of going to the bottom, has offered the annular groove on the fluid passage's between stress dispersion toper section and case the inner wall, is equipped with round collar stop in the annular groove, the circle collar stop adopts two circular bead forms, comprises last circular bead and lower circular bead, and the diameter of lower circular bead is greater than the diameter of circular bead, and lower circular bead is laid in the annular groove, and the outer wall cover of going up the circular bead is equipped with the jump ring. The utility model provides a back pressure is location structure for valve when the case became invalid, can keep the body can continue to use at on -the -spot quick replacement, and assembly methods is simple, has prolonged the life of back pressure valve, provides lower use and manufacturing cost.