A conduit locking device includes a housing having a first end, a second end, and a sidewall disposed between the first end and the second end. The conduit locking device may further include a slide engaged with the sidewall of the housing, the slide including an extension arm and an end portion structurally configured to engage with an inner wall of a conduit. The slide may be extendable via the extension arm from a first position substantially adjacent to the sidewall of the housing to a second position disposed away from the sidewall of the housing, where, when in the second position, the slide is configured to retain the conduit locking device at a fixed position within the conduit through the engagement of the end portion with the inner wall of the conduit.

A plug for plugging a line includes a seal, a first end assembly and a second end assembly. The first end assembly includes a gripping member. An actuator is configured to draw the first and second end assemblies together when there is a relative motion between the actuator and the first end assembly. The actuator is configured to actuate the gripping member. An initial part of a motion of the actuator actuates the gripping member to grip an inner surface of the line, thus inhibiting a motion of the first end assembly, and a subsequent part of the motion of the actuator, relative to the thus motion-inhibited first end assembly, draws the second end assembly toward the first end assembly so as to compress the seal such that the seal may seal against the inner surface of the line thus plugging the line.

A plug for plugging a line includes a seal, a first end assembly and a second end assembly. The first end assembly includes a gripping member. An actuator is configured to draw the first and second end assemblies together when there is a relative motion between the actuator and the first end assembly. The actuator is configured to actuate the gripping member. An initial part of a motion of the actuator actuates the gripping member to grip an inner surface of the line, thus inhibiting a motion of the first end assembly, and a subsequent part of the motion of the actuator, relative to the thus motion-inhibited first end assembly, draws the second end assembly toward the first end assembly so as to compress the seal such that the seal may seal against the inner surface of the line thus plugging the line.

A mechanical lock unit with a shaft lock assembly and method of achieving a self-lock mode for, e.g., hydraulically activated isolation plug module. The shaft lock assembly includes a teeth-form ring that surrounds a shaft. The teeth-form ring defines a plurality of teeth. A teeth-form split gripper assembly is positioned to surround the teeth-form ring. The teeth-form split gripper assembly has at least a first teeth-form split gripper and a second teeth-form split gripper with a spring therebetween for biasing the first teeth-form split gripper away from said second teeth-form split gripper. The first teeth-form split gripper and the second teeth form split gripper having an inner surface that defines a plurality of teeth for cooperative engagement with the plurality of teeth of the teeth-form ring.

A pipe tester connector includes rigid cylindrical member. The rigid cylindrical member defines a first side hole. A continuous flexible cup member includes circular floor portion and a central tubular portion extending upwardly therefrom. A first flexible sleeve extends from the top of the flexible cup. The first flexible sleeve has a folded down first position and a folded up second position, in which it envelopes the end of the first pipe. A first hose clamp secures the flexible sleeve to the pipe. An attachment unit includes a rigid insert, an attachment pipe, a first adapter and an attachment. The rigid insert is disposed against the tubular portion of the interior surface of the flexible cup. The rigid insert defines a hole in alignment with the first side hole and the second side hole, through which the attachment pipe passes. An adapter is affixed to the attachment pipe.

A pipe tester connector includes rigid cylindrical member. The rigid cylindrical member defines a first side hole. A continuous flexible cup member includes circular floor portion and a central tubular portion extending upwardly therefrom. A first flexible sleeve extends from the top of the flexible cup. The first flexible sleeve has a folded down first position and a folded up second position, in which it envelopes the end of the first pipe. A first hose clamp secures the flexible sleeve to the pipe. An attachment unit includes a rigid insert, an attachment pipe, a first adapter and an attachment. The rigid insert is disposed against the tubular portion of the interior surface of the flexible cup. The rigid insert defines a hole in alignment with the first side hole and the second side hole, through which the attachment pipe passes. An adapter is affixed to the attachment pipe.

A conduit locking device includes a housing having a first end, a second end, and a sidewall disposed between the first end and the second end. The conduit locking device may further include a slide engaged with the sidewall of the housing, the slide including an extension arm and an end portion structurally configured to engage with an inner wall of a conduit. The slide may be extendable via the extension arm from a first position substantially adjacent to the sidewall of the housing to a second position disposed away from the sidewall of the housing, where, when in the second position, the slide is configured to retain the conduit locking device at a fixed position within the conduit through the engagement of the end portion with the inner wall of the conduit.

A conduit locking device includes a housing having a first end, a second end, and a sidewall disposed between the first end and the second end. The conduit locking device may further include a slide engaged with the sidewall of the housing, the slide including an extension arm and an end portion structurally configured to engage with an inner wall of a conduit. The slide may be extendable via the extension arm from a first position substantially adjacent to the sidewall of the housing to a second position disposed away from the sidewall of the housing, where, when in the second position, the slide is configured to retain the conduit locking device at a fixed position within the conduit through the engagement of the end portion with the inner wall of the conduit.

A pipe tester connector includes rigid cylindrical member. The rigid cylindrical member defines a first side hole. A continuous flexible cup member includes circular floor portion and a central tubular portion extending upwardly therefrom. A first flexible sleeve extends from the top of the flexible cup. The first flexible sleeve has a folded down first position and a folded up second position, in which it envelopes the end of the first pipe. A first hose clamp secures the flexible sleeve to the pipe. An attachment unit includes a rigid insert, an attachment pipe, a first adapter and an attachment. The rigid insert is disposed against the tubular portion of the interior surface of the flexible cup. The rigid insert defines a hole in alignment with the first side hole and the second side hole, through which the attachment pipe passes. An adapter is affixed to the attachment pipe.

A pipe tester connector includes rigid cylindrical member. The rigid cylindrical member defines a first side hole. A continuous flexible cup member includes circular floor portion and a central tubular portion extending upwardly therefrom. A first flexible sleeve extends from the top of the flexible cup. The first flexible sleeve has a folded down first position and a folded up second position, in which it envelopes the end of the first pipe. A first hose clamp secures the flexible sleeve to the pipe. An attachment unit includes a rigid insert, an attachment pipe, a first adapter and an attachment. The rigid insert is disposed against the tubular portion of the interior surface of the flexible cup. The rigid insert defines a hole in alignment with the first side hole and the second side hole, through which the attachment pipe passes. An adapter is affixed to the attachment pipe.