Measuring apparatus for attaching to a conduit in a borehole

Claim 2

Apparatus for attaching to a conduit in a borehole comprising: a. surface equipment including attachment monitor means and attachment control means; b. cable means connected with said surface equipment for traversing into said borehole; said cable means having at least one electrical conductor and electrical ground means; c. borehole tool means physically and electrically connected with said cable means and adapted for traveling longitudinally of said conduit in said borehole; said borehole tool means including attachment means that is operable to engage and disengage a plurality of attachment members with said conduit at predetermined depths any number of times on a single trip traversing said conduit; said attachment means being remotely controlled by said attachment control means and adapted to provide an attachment force when engaging said attachment members with said conduit that is sufficient to effect movement of the portion of said borehole tool means in which said attachment members are located responsive to any movement of said conduit with which said attachment members are engaged regardless of the weight of said borehole tool, and apparatus bearing thereon and suspended therefrom; said attachment members being substantially nonrestrictive to flow of fluids therepast; said attachment means including downhole power means for supplying attachment force to said attachment members, and mechanical linkage means connecting said attachment members with said power means; said attachment members being disposed such that each attachment member when contacting said conduit produces reaction forces which are transferred to the other attachment members, so that a positive conduit gripping action is achieved.

Claim 3

The apparatus of claim 1 wherein said attachment control means is directly settable to provide a maximum force that is applied to set said attachment members in engagement with said conduit.

Claim 4

The apparatus of claim 1 wherein said attachment means is mechanical apparatus that is electrically powered and electrically controlled.

Claim 5

The apparatus of claim 1 wherein said attachment means is an electro-hydraulic apparatus that employs hydraulic pressure in hydraulically operable means in said tool and is powered and controlled electrically.

Claim 6

The apparatus of claim 1 wherein said attachment means is a hydraulic apparatus that employs hydraulic pressure in hydraulically operable means in said tool.

Claim 7

Apparatus for measuring the point at which a conduit is stuck in a borehole penetrating subterranean formations comprising: a. surface equipment including attachment monitoring means and attachment control means; b. cable means connected with said surface equipment and traversing into said borehole; said cable means having at least one electrical conductor and an electrical ground means; c. borehole tool means physically and electricAlly connected with said cable means and suspended within said conduit and adapted for being traversed longitudinally of said conduit in said borehole; said borehole tool means including upper and lower attachment means carried by respective upper and lower portions, said attachment means being operable to frictionally engage attachment members with said conduit with a force sufficient to effect responsive movement of the respective upper and lower portions concomitantly with movement of said conduit; said borehole tool means having a sensing means disposed intermediate said upper and lower portions, said sensing means also including a detector means that is responsive to stress induced in said conduit; at least one of said attachment means comprising an improved attachment means that is operable to engage and disengage a plurality of attachment members with said conduit at predetermined depths any number of times on a single trip traversing said conduit; said attachment means being remotely controlled by said attachment control means and adapted to provide an attachment force when engaging said attachment members with said conduit that is sufficient to support said borehole tool means and apparatus bearing thereon and suspended therefrom, in said conduit; said attachment members are substantially nonrestrictive to flow of fluids therepast; said improved attachment means including downhole power means for supplying attachment force to said attachment members, and mechanical linkage means connecting said attachment members with said power means; said attachment members being disposed such that each attachment member when contacting said conduit produces reaction forces which are transferred to the other attachment members, so that a positive conduit gripping action is achieved.

Claim 8

Apparatus for measuring the point at which a conduit is stuck in a borehole penetrating subterranean formations comprising: a. surface equipment including attachment monitoring means and attachment control means; b. cable means connected with said surface equipment and traversing into said borehole; said cable means having at least one electrical conductor and an electrical ground means; c. borehole tool means physically and electricAlly connected with said cable means and suspended within said conduit and adapted for being traversed longitudinally of said conduit in said borehole; said borehole tool means including upper and lower attachment means carried by respective upper and lower portions, said attachment means being operable to frictionally engage attachment members with said conduit with a force sufficient to effect responsive movement of the respective upper and lower portions concomitantly with movement of said conduit; said borehole tool means having a sensing means disposed intermediate said upper and lower portions, said sensing means also including a detector means that is responsive to stress induced in said conduit; at least one of said attachment means comprising an improved attachment means that is operable to engage and disengage a plurality of attachment members with said conduit at predetermined depths any number of times on a single trip traversing said conduit; said attachment means being remotely controlled by said attachment control means and adapted to provide an attachment force when engaging said attachment members with said conduit that is sufficient to support said borehole tool means and apparatus bearing thereon and suspended therefrom, in said conduit; said attachment members are substantially nonrestrictive to flow of fluids therepast; said improved attachment means including downhole power means for supplying attachment force to said attachment members, and mechanical linkage means connecting said attachment members with said power means; said attachment members being disposed such that each attachment member when contacting said conduit produces reaction forces which are transferred to the other attachment members, so that a positive conduit gripping action is achieved.

Claim 9

The apparatus of claim 6 wherein said attachment means is directly settable to provide a maximum force that is applied to set said attachment members in engagement with said conduit.

Claim 10

The apparatus of claim 6 wherein said improved attachment means is mechanical apparatus that is electrically powered and electrically controlled.

Claim 11

The apparatus of claim 6 wherein said improved attachment means is an electro-hydraulic apparatus that employs hydraulic pressure in hydraulically operable means in said tool and is powered and controlled electrically.

Claim 12

The apparatus of claim 6 wherein said attachment members in said improved attachment means are pivotally mounted with their free end extending away from said cable means; wherein limit stop means are provided for preventing said attachment members attaining an angle greater than 90* with respect to the longitudinal axis of said borehole tool means; said attachment members being connected with a power means in said improved attachment means via a shear pin that is shearable at a force less than that required to effect movement of said power means without power by said attachment members and less than the maximum longitudinal force that can be exerted by said cable means without failure; whereby said tool can be pulled upwardly to shear said shear pin and release said attachment members in said borehole tool in the event of failure of power to said power means in said attachment means.

Claim 13

The apparatus of claim 10 wherein said power means comprises an electric motor and rotates a screw, said attachment members have a gear means that is adapted to move the free end of said attachment members inwardly and outwardly in response to respective movement of a shaft that is connected therewith, said shaft and said screw being connected via a screw housing and said shear pin such that the free end of said attachment members is moved inwardly and outwardly in response to respective rotation of said screw by said motor; and wherein said limit stop means comprises a lower spacer means which stops downward movement of said screw housing before said shaft is moved downwardly to the extent that the free end of said attachment members is moveD outwardly to attain an angle greater than said 90*.

Claim 14

The apparatus of claim 6 wherein said attachment means is a hydraulic apparatus that employs hydraulic pressure in hydraulically operable means in said tool.

Claim 15

A borehole tool comprising: a. an elongate body means adapted for traversing longitudinally of a conduit in a borehole penetrating subterranean formations; b. cable attachment means at the upper end of said body means for physically and electrically connecting with a cable means; c. attachment means, including attachment members, carried by said body means for attaching said body means to said conduit; said attachment members being pivotally mounted with their free end extending away from said cable attachment means; limit stop means for preventing said attachment members attaining an angle greater than 90* with respect to the longitudinal axis of said borehole tool; power means in said attachment means; said attachment members being connected with said power means via a shear pin that is shearable at a force less than that required to effect movement of said power means without power by said attachment members and less than the maximum longitudinal force that can be exerted by said cable attachment means without failure; whereby said tool can be pulled upwardly to shear said shear pin and release said attachment members and said borehole tool in the event of failure of power to said power means in said attachment means.

Claim 16

A borehole tool comprising: a. an elongate body means adapted for traversing longitudinally of a conduit in a borehole penetrating subterranean formations; b. cable attachment means at the upper end of said body means for physically and electrically connecting with a cable means; c. attachment means, including attachment members, carried by said body means for attaching said body means to said conduit; said attachment members being pivotally mounted with their free end extending away from said cable attachment means; limit stop means for preventing said attachment members attaining an angle greater than 90* with respect to the longitudinal axis of said borehole tool; power means in said attachment means; said attachment members being connected with said power means via a shear pin that is shearable at a force less than that required to effect movement of said power means without power by said attachment members and less than the maximum longitudinal force that can be exerted by said cable attachment means without failure; whereby said tool can be pulled upwardly to shear said shear pin and release said attachment members and said borehole tool in the event of failure of power to said power means in said attachment means.

Claim 17

The borehole tool of claim 13 wherein said cable attachment means in said borehole tool is connected with a cable that is connected with surface equipment; said power means comprises an electric motor rotating a screw, said attachment members have a gear means that is adapted to move the free end of said attachment members inwardly and outwardly in response to respective movement of a shaft that is connected therewith, said shaft and said screw being connected via a screw housing and said shear pin such that the free end of said attachment members is moved inwardly and outwardly in response to respective rotation of said screw by said motor, said motor being controlled from the surface via an attachment control means.