joint reduces the time and cost of many well completion and maintenance operations and thereby reduces the cost of producing hydrocarbons application_number US 44864599 A description the invention provides an apparatus and method for using the apparatus for performing downhole operations in well bores which require the axial displacement of downhole tools and or the axial displacement of well tubing in the well bore the invention also provides a practical means for maintaining tension or compression on a tubing string in the well bore fig1 shows a cross sectional view of a locking telescoping joint with a latch assembly in accordance with the invention for use in a conduit such as a production tubing connected to a wellhead for permitting the conduit to be axially displaced in the well bore without disconnecting the conduit from the wellhead the locking telescoping joint generally indicated by reference numeral 10 includes a first tubular section 12 and a second tubular section 14 which has a larger diameter than the first tubular section the first tubular section 12 has a first end 16 a second end 18 and a polished outer surface 20 which extends between the first end 16 and the second end 18 the first end 16 is machined with a standard thread 22 which is compatible with standard tubing connectors the second end 18 of the first tubular section 12 is provided with a radially projecting latch member that engages a complementary latch point on an inner surface of the second tubular section.