Houston Engineers, Inc.

Other

Billy J Roberts

Arthur W Meeks

Arthur W Neeks

Elmer J Volmert

Sharon P Nelson

There is disclosed a single-acting hydraulic jar having upper and lower detent pressure chambers having upper and lower restrictions, respectively, formed on the inner diameter of its outer tubular member and through which upper and lower detent means carried about the outer diameter of the inner tubular member may be moved in order to impart an up jar.

Hydraulic jar

There is disclosed a double-acting hydraulic jar having upper and lower detent pressure chambers having upper and lower restrictions, respectively, formed on the inner diameter of its outer tubular member and through which upper and lower detent means carried about the outer diameter of the inner tubular member may be moved in order to impart either an up or down jar.

There is disclosed a tool for enhancing the impact of a jar delivered to an object stuck in a well bore during both upward and downward jars to the stuck object. The tool includes a first tubular member having an lower end connectible to the tubular member of the jar on which the hammer is mounted and a second tubular member connectible to a well pipe string above it and arranged for reciprocation with respect to the first member to form an annular space between them. The space is divided into upper and lower chambers by means of seal rings disposed between the members and the spaces are filled with a compressible fluid which is compressed as the second tubular member is moved in either upward or downward directions.

Jar enhancer

There is disclosed a tool for enhancing the impact delivered to an object stuck in a well bore by means of a jar having a first tubular member connected to the object and a second tubular member having a hammer arranged to deliver an upward blow to an anvil on the first member in response to raising and a downward blow in response to lowering of the second tubular mandrel member with respect to the first member, the tool comprising a first tubular member having a lower end adapted to be connected to the second tubular member of the jar for raising and lowering therewith, a second tubular member vertically reciprocable with respect to the first member to form on annular space between them and having an upper end adapted to be connected to a well pipe string above it, and first and second sets of upper and lower longitudinally spaced seal rings within the annular space and sealably slidable with respect to equal diameter portions of each of the tubular members to form upper and lower fluid chambers between the upper and lower seal rings, and shoulders on the tubular members in the annular space so arranged that, upon filling of the chambers with a compressible fluid, raising of the second member will compress the fluid in the upper and lower chambers to enhance the impact of an upward jar and lowering of the second member will compress the fluid in the lower chamber to enhance the impact of a downward jar.

An apparatus for use in transmitting torque between a first part rotatable about a fixed axis and a second part rotatable in a circular path about the axis, and which includes a torque bar having its ends connected to ends of the parts by universal joints.

Constant velocity universal joint assembly for downhole motor

There are disclosed alternate embodiments of a double acting hydraulic jar having a single detent chamber having a restriction on the inner diameter of its outer tubular member through which detent means carried about the outer diameter of the inner tubular member may be moved in order to impart either an up or down jar.

Growing community of inventors

Houston, TX, United States of America

Billy J Roberts