نمایش نتیجه 1 تا 3 از 3 نتیجه یافت شده برای drag blocks:
n pi: spring-loaded buttons on a packer that provide friction with casing to retard movement of one section of a packer while another section rotates for setting.
spring loaded blocks on a packer or other tool that contact the pipe wall, producing resistance to movement. They aid in setting of packers.
n: spring-loaded curved metal bands on a packer that operate like drag blocks.
packers equipped with drag blocks or springs so rotation of the pipe unlatches the slips and sets the packer.
© ۱۳۹۲-۱۳۹۷ این اثر شامل قانون حمایت از مولفین بوده و هرگونه کپی برداری از آن ممنوع است.
