Dynanometer for a pump-off control

Claim 2

Apparatus for measuring tension in a pair of spaced, elongated, parallel members, comprising, in combination, a discontinuous spring member having the distal ends thereof spaced from a midportion, clamp means by which said distal ends are attachable to the elongated members to cause each of said elongated members to be biased out of parallel relationship while said distal ends are springingly moved respective to one another in proportion to movement of said elongated members; a sensor means connected to sense a change in the magnitude of the sprung relationship of said distal ends respective to one another and to said midportion; said sensor means includes a scribe mounted to be moved in proportion to relative movement of said distal ends; and a chart means connected to contact said scribe such that movement of said scribe respective to said chart means provides stored data related to the relative position of said distal ends.

Claim 3

The apparatus of claim 1 wherein said spring member is of U-shaped configuration, so that said distal ends are moved away from and towards one another as the tension in said spaced, elongated members increases and decreases.

Claim 4

The apparatus of claim 1 and further including a recorder means including a scribe and a chart, means by which said scribe moves relative to said chart to place indicia thereon in response to movement of said distal ends; means by which said chart can be moved relative to said scribe to thereby provide indicia on said chart which has a vertical and a horizontal component.

Claim 5

In combination with a pumpjack unit, apparatus for producing a signal which is related to the tension in the rod string comprising: a discontinuous spring member having distal ends spaced from a midportion thereof; clamp means by which said distal ends are attachable to the bridle of the pumpjack unit such that the two elongated cables of the bridle are sprung out of parallel relationship respective to one another, thereby causing relative movement between said distal ends as the tension within the bridle cables change during each stroke of the pumpjack unit; and a sensor means mounted to sense a change in the sprung relationship of said distal ends.

Claim 6

In combination with a pumpjack unit, apparatus for producing a signal which is related to the tension in the rod string comprising: a discontinuous spring member having distal ends spaced from a midportion thereof; clamp means by which said distal ends are attachable to the bridle of the pumpjack unit such that the two elongated cables of the bridle are sprung out of parallel relationship respective to one another, thereby causing relative movement between said distal ends as the tension within the bridle cables change during each stroke of the pumpjack unit; and a sensor means mounted to sense a change in the sprung relationship of said distal ends.

Claim 7

The combination of claim 4 wherein said sensor means includes a stylus mounted to be moved in proportion to relative movement of said distal ends; and a chart means connected to contact said stylus such that movement of said stylus respective to said chart means provides stored data related to the relative position of said distal ends.

Claim 8

The combination of claim 5 wherein said chart means is housed within an enclosure and further includes means by which said chart means is moved respective to said stylus to thereby provide indicia along two different axis.

Claim 9

The combination of claim 4 wherein said sensor means is a switch assembly which is moved from a conducting to a non-conducting configuration in response to relative movement of said distal ends.

Claim 10

The combination of claim 4 wherein said sensor means includes a transducer, means by which said transducer is connected to provide a signal in response to relative movement of one said distal end respective to said midportion.

Claim 11

The apparatus of claim 4 wherein said sensor means includes a scribe; a chart mounted respective to said scribe to cause indicia to be placed thereon related to tension change in the bridle; means moving said chart relative to said scribe to cause indicia to be placed on the chart related to the vertical position of the rod string.

Claim 12

Dynamometer apparatus connected to measure the change in tension in a string of sucker rod connected to a pumpjack unit by a bridle, comprising in combination: a discontinuous spring member having distal ends spaced from a midportion thereof; clamp means by which said distal ends are attachable to the bridle of the pumpjack unit such that the two elongated cables of the bridle are sprung out of parallel relationship respective to one another, thereby causing relative movement between said distal ends as the tension within the bridle cables change during each stroke of the pumpjack unit; a sensor means mounted to sense a change in the sprung relationship of said distal ends; said sensor means includes a scribe; a chart mounted respective to said scribe to cause indicia to be placed thereon related to tension change in the bridle and, means moving said chart relative to said scribe to cause indicia to be placed on the chart related to the vertical position of the rod string.

Claim 13

Dynamometer apparatus connected to measure the change in tension in a string of sucker rod connected to a pumpjack unit by a bridle, comprising in combination: a discontinuous spring member having distal ends spaced from a midportion thereof; clamp means by which said distal ends are attachable to the bridle of the pumpjack unit such that the two elongated cables of the bridle are sprung out of parallel relationship respective to one another, thereby causing relative movement between said distal ends as the tension within the bridle cables change during each stroke of the pumpjack unit; a sensor means mounted to sense a change in the sprung relationship of said distal ends; said sensor means includes a scribe; a chart mounted respective to said scribe to cause indicia to be placed thereon related to tension change in the bridle and, means moving said chart relative to said scribe to cause indicia to be placed on the chart related to the vertical position of the rod string.

Claim 14

The apparatus of claim 10 wherein said scribe and said chart are housed within an enclosure and said enclosure includes means by which it is removably affixed to said spring.

Claim 15

The apparatus of claim 10 wherein said chart means includes a cylindrical housing which includes journal means by which it is rotatably disposed adjacent to said scribe such that the scribe can place indicia about the outer peripheral surface of said housing; an elongated longitudinal slot formed in said housing for receiving a strip chart therethrough, whereby a roll of strip chart can be placed within the housing and a marginal end thereof brought through the slot and placed about the outer peripheral surface of the cylindrical housing such that the scribe places indicia on the chart.

Claim 16

Apparatus for measuring tension in a pair of spaced, elongated, parallel members, comprising, in combination, a discontinuous spring member having the distal ends thereof spaced from a midportion, clamp means by which said distal ends are attachable to the elongated members to cause each of said elongated members to be biased out of parallel relationship while said distal ends are springingly moved respective to one another in proportion to movement of said elongated members; a sensor means connected to sense a change in the magnitude of the sprung relationship of said distal ends respective to one another and to said midportion; said distal ends include arm members extending in opposed relationship to one another; and a boomer means by which said arms can be effectively shortened so that said clamp means can be quickly affixed to and removed from said elongated members.

Claim 17

Apparatus for measuring tension in a pair of spaced, elongated, parallel members, comprising, in combination, a discontinuous spring member having the distal ends thereof spaced from a midportion, clamp means by which said distal ends are attachable to the elongated members to cause each of said elongated members to be biased out of parallel relationship while said distal ends are springingly moved respective to one another in proportion to movement of said elongated members; a sensor means connected to sense a change in the magnitude of the sprung relationship of said distal ends respective to one another and to said midportion; said distal ends include arm members extending in opposed relationship to one another; and a boomer means by which said arms can be effectively shortened so that said clamp means can be quickly affixed to and removed from said elongated members.

Claim 18

The apparatus of claim 13 wherein said sensor means includes a stylus mounted to be moved in proportion to relative movement of said distal ends; and a chart means connected to contact said stylus such that movement of said stylus respective to said chart means provides stored data related to the relative position of said distal ends.

Claim 19

The apparatus of claim 14 wherein said chart means is housed within an enclosure and further includes means by which said chart means is moved respective to said stylus to thereby provide indicia along two different axis.

Claim 20

The apparatus of claim 13 wherein said sensor means is a switch assembly which is moved from a conducting to a non-conducting configuration in response to relative movement of said distal ends respective to said midportion.

Claim 21

The apparatus of claim 13 wherein said sensor means includes a transducer, means by which said transducer is connected to provide a signal in response to relative movement of said distal ends respective to said midportion.

Claim 22

The apparatus of claim 13 wherein said spring member is of U-shaped configuration so that said distal ends are moved away from and towards on another as the tension in said spaced, elongated members increases and decreases; a first arcuate member affixed to one of said distal ends, a second arcuate member affixed to another of said distal ends; mount means, said first arcuate member being affixed to said mount means, said second arcuate member having a free end portion, said sensor means being connected to sense movement between said mount means and said free end portion of said second arcuate member.

Claim 23

The apparatus of claim 13 wherein said distal ends include arm members extending in opposed relationship to one another; and a boomer means by which said arms can be effectively shortened so that said clamp means can be quickly affixed to and removed from said elongated members.

Claim 24

Apparatus for measuring tension in a pair of spaced, elongated, parallel members, comprising, in combination, a discontinuous spring member having the distal ends thereof spaced from a midportion, clamp means by which said distal ends are attachable to the elongated members to cause each of said elongated members to be biased out of parallel relationship while said distal ends are springingly moved respective to one another in proportion to movement of said elongated members; a sensor means connected to sense a change in the magnitude of the sprung relationship of said distal ends respective to one another and to said midportion; a recorder means including a scribe and a chart, means by which said scribe moves relative to said chart to place indicia thereon in response to movement of said distal ends; and, means by which said chart can be moved relative to said scribe to thereby provide indicia on said chart which has a vertical and a horizontal component.

Claim 25

Apparatus for measuring tension in a pair of spaced, elongated, parallel members, comprising, in combination, a discontinuous spring member having the distal ends thereof spaced from a midportion, clamp means by which said distal ends are attachable to the elongated members to cause each of said elongated members to be biased out of parallel relationship while said distal ends are springingly moved respective to one another in proportion to movement of said elongated members; a sensor means connected to sense a change in the magnitude of the sprung relationship of said distal ends respective to one another and to said midportion; a recorder means including a scribe and a chart, means by which said scribe moves relative to said chart to place indicia thereon in response to movement of said distal ends; and, means by which said chart can be moved relative to said scribe to thereby provide indicia on said chart which has a vertical and a horizontal component.

Claim 26

Apparatus for measuring tension in a pair of spaced, elongated, parallel members, comprising, in combination, a discontinuous spring member having the distal ends thereof spaced from a midportion, clamp means by which said distal ends are attachable to the elongated members to cause each of said elongated members to be biased out of parallel relationship while said distal ends are springingly moved respective to one another in proportion to movement of said elongated members; a sensor means connected to sense a change in the magnitude of the sprung relationship of said distal ends respective to one another and to said midportion; said spring member is of U-shaped configuration so that said distal ends are moved away from and towards one another as the tension in spaced, elongated members increases and decreases; a first arcuate member affixed to one of said distal ends, a second arcuate member affixed to another of said distal ends; mount means, said first arcuate member being affixed to said mount means, said second arcuate member having a free end portion, said sensor means being connected to sense movement between said mount means and said free end portion of said second arcuate member.

Claim 27

Apparatus for measuring tension in a pair of spaced, elongated, parallel members, comprising, in combination, a discontinuous spring member having the distal ends thereof spaced from a midportion, clamp means by which said distal ends are attachable to the elongated members to cause each of said elongated members to be biased out of parallel relationship while said distal ends are springingly moved respective to one another in proportion to movement of said elongated members; a sensor means connected to sense a change in the magnitude of the sprung relationship of said distal ends respective to one another and to said midportion; said spring member is of U-shaped configuration so that said distal ends are moved away from and towards one another as the tension in spaced, elongated members increases and decreases; a first arcuate member affixed to one of said distal ends, a second arcuate member affixed to another of said distal ends; mount means, said first arcuate member being affixed to said mount means, said second arcuate member having a free end portion, said sensor means being connected to sense movement between said mount means and said free end portion of said second arcuate member.