7 Downhole tools for use in oil and gas wells; downhole tools for use in oil and gas wells, namely, impact tools, jarring tools, and shock tools; downhole tools for use in oil and gas wells, namely, impact tools, jarring tools, and shock tools for imparting an impact force to an object located within a wellbore; downhole tools for use in oil and gas wells, namely, impact tools, jarring tools, and shock tools for imparting an impact force to an object located within a horizontal portion of a wellbore; downhole tools for use in oil and gas wells, namely, impact tools, jarring tools, and shock tools for imparting an impact force to a downhole tool located within a wellbore to actuate or operate the downhole tool; downhole tools for use in oil and gas wells, namely, impact tools, jarring tools, and shock tools for imparting an impact force to a downhole valve located within a wellbore to actuate or operate the downhole valve; downhole tools for use in oil and gas wells, namely, impact tools, jarring tools, and shock tools for imparting an impact force to an object that is stuck within a wellbore to dislodge the object; and downhole tools for use in oil and gas wells, namely, impact tools, jarring tools, and shock tools for imparting an impact force to a downhole tool string that is stuck within a wellbore to dislodge the downhole tool string