Back to results
US 4,958,691 AGranted
Fluid operated vibratory jar with rotating bit
OwnerJames Hippinventor
Life of this patent
Estimating the term…
Abstract
A downhole oil well tool uses impact, reciprocal drilling and an improved rotating bit or like working member, receiving both fluid pressure and weight from an elongated pipe string with a flow bore in order to drive the tool. A valve within tool housing controls fluid pressure to the working end so that the tool pressures up, then releases pressure through the working member allowing the pipe string to load the bit, creating impact. A clutch rotates the working member during drilling to prevent imprint upon the formation.
Claims13
A well tool for use with an elongated pipe string that can load the tool transmitting impact thereto and with a flow bore for transmitting pressurized fluid to the tool comprising:
- (a) a housing having means for connecting said tool in fluid communication with the lower end of a pipe string and defining at least one fluid chamber therein for receiving pressurized fluid transmitted from the pipe string thereto;
- (b) tubular stem means having a flow channel therethrough communicating with the fluid chamber, the stem means telescopically received by said housing for relative reciprocal movement therewith between a first "pressured up" unloaded position and a second "impact" loaded position;
- (c) an impact receptive working member attached during use to one end of said tubular stem means for movement therewith between said first and second positions, wherein impact is transmitted to the working member in the second impact position;
- (d) valve means carried in said housing for controlling the flow of pressurized fluid in the fluid chamber and reciprocally movable therein between first and second positions, said valve means being operable to relieve fluid pressure within the fluid chamber responsive to predetermined movement of said stem means relative to said housing, permitting relative movement of said stem means and housing into said second "impact" position;
- (e) biasing means disposed in said chamber, biasing said valve means upwardly into an open flow position when said stem member and housing are in said first unloaded position so that pressurized fluid can flow between the pipe string flow bore and the tubular stem flow channel;
- and
- (f) means interfacing said housing and said stem means for rotating said working member during relative movement of said housing and stem means at least between said first "pressured up" and second "impact" position, including clutch means concentrically positioned between the stem means and the housing and extendable below the housing for rotating the working member in one direction when unloaded by the work string.
4 more elements
An impact, driven well tool for use with an elongated tubular pipe string having a central flow conveying bore for channelling pressurized fluid to the tool, comprising:
- (a) an elongated longitudinally extending tool body having means for connecting the tool body to the pipe string;
- (b) a fluid chamber in the tool body in fluid communication with the pipe string bore;
- (c) a stem reciprocally movable within the tool body in a telescoping fashion, the stem having a lower end portion for carrying a working member;
- (d) pressure responsive valve means for controlling relative movement of the stem and tool body;
- and
- (e) clutch means concentrically positioned between the stem and the body and extendable below the tool body for rotating the working member in one direction during a downward movement of the tool body relative to the stem.
3 more elements
A well tool for use with an elongated pipe string that can load the tool transmitting impact thereto and with a flow bore for transmitting fluid pressure to the tool comprising:
- (a) a housing having means for connecting said tool in fluid communication with the lower end of a pipe string and defining at least one fluid chamber therein for receiving fluid pressure transmitted from the pipe string thereto;
- (b) tubular stem means having a flow channel therethrough communicating with the fluid chamber, the stem being telescopically received by said housing for relative reciprocal movement therewith in between a first "pressured up" unloaded position and a second "impact" loaded position;
- (c) an impact receptive working member attached to one end of said stem means for said relative movement therewith between said first and second positions, wherein impact is transmitted to the working member in the second impact position;
- (d) valve means carried within the housing for controlling the flow of fluid under pressure in the fluid chamber during said reciprocal movement, said valve means being operable to relieve fluid pressure within the fluid chamber responsive to a predetermined movement of the stem means relative to the housing, permitting relative movement of said stem means and housing into said second "impact" position;
- (e) biasing means disposed in said chamber, biasing said valve means upwardly into an open flow position when said stem member and housing are in said first unloaded position so that pressurized fluid can flow between the pipe string flow bore and the tubular stem flow channel;
- (f) means interfacing said housing and said stem means for rotating said working member during relative movement of said housing and stem means at least between said first "pressured up" and second "impact" position;
- and
- (g) wherein the interfacing means includes a tubular clutch positioned concentrically between the housing and the stem means for rotating the working member in one direction when the housing and stem means move relative to one another, the clutch having an enlarged lower end that engages the housing upon impact transmitted to the working member.
5 more elements
Dependencies are inferred from the claim text.