US3710448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording inclinometer
Assignee: Thermotics Inc
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Filing: 1971-08-30
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Granted: 1973-01-16
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Expires: 1991-08-30
Abstract
Abstract A well bore inclinometer comprises an instrument mounted in a flow tube forming a part of a drill string. The instrument includes a record tape cartridge that is reciprocated each time the pump pressure is shut off and restored. Each upward motion causes the tape to be perforated by a punch on the lower end of a pendulum and to be perforated by a plurality of punches located at the upper end of the cartridge. The position of the hole made by the punch carried by the pendulum relative to the field of holes caused by the plurality of punches indicates degree and direction of inclination. Each reciprocation of the cartridge moves the tape to present a new unpunched area. If the flow tube is made of non-magnetic material, the pendulum may be magnetized to function as a compass, and the punch may then be in the form of a pointer to indicate a compass direction. The cartridge includes a resilient platen disposed beneath the part of the tape being punched. The platen is secured to the cartridge at its periphery leaving the upper surface substantially clear for reception of the punches marking the field as well as that of indicating the direction of inclination. The drive means for moving the tape includes spring means to insure sufficient movement of the tape to present a new unpunched area upon each reciprocation of the cartridge. The instrument portion of the inclinometer may be retrieved from and inserted into the flow tube by means of wire line. To this end a fishing head adapted for making a releasable connection with a wire line fishing tool is attached to the upper end of the instrument. The fishing head is constructed in a manner to provide a low resistance to flow through the flow tube.
Inventors
- 👤 J Kimmel
- 👤 G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:21
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
113 words
A well tool comprising: a flow tube for connection in a drill string to transmit drilling fluid, an instrument mounted in said flow tube, said instrument including indicator means responsive to a well characteristic for producing an indication measuring said characteristic, recording means to record the indication of said indicator means, flow responsive means responsive to the rate of flow through said flow tube to actuate said recording means, said recording means including marking means carried by said indicator means and mark receiving means actuated by said flow responsive means to actuate said recording means, and a plurality of markers in position to engage said mark receiving means and define a field thereon.
Claim 2
Dependent Claim
113 words
A well tool comprising: a flow tube for connection in a drill string to transmit drilling fluid, an instrument mounted in said flow tube, said instrument including indicator means responsive to a well characteristic for producing an indication measuring said characteristic, recording means to record the indication of said indicator means, flow responsive means responsive to the rate of flow through said flow tube to actuate said recording means, said recording means including marking means carried by said indicator means and mark receiving means actuated by said flow responsive means to actuate said recording means, and a plurality of markers in position to engage said mark receiving means and define a field thereon.
Claim 3
Dependent Claim
55 words
A well tool according to claim 1 wherein said instrument includes a support, said indicator means being carried by said support, said mark receiving means being movable relative to said support to actuate said recording means, said markers being affixed to said mark receiving means, and a marker actuating means fixed relative to said support.
Claim 4
Dependent Claim
41 words
A well tool according to claim 1 wherein said mark receiving means includes a tape to record the indication of said indicator means, and said markers comprise a plurality of punches adapted to perforate said tape to define a field thereon.
Claim 5
Dependent Claim
50 words
A well tool according to claim 3 wherein said plurality of punches are fixed to individual arms, said arms being attached to said mark receiving means whereby upon the upward movement of said mark receiving means against said marking means said punches engage said tape and define a field thereon.
Claim 6
Dependent Claim
106 words
A well tool according to claim 3, wherein said mark receiving means includes a cartridge, said plurality of punches being affixed to individual resilient arms, said arms being anchored to the upper end of said cartridge, said arms having a first position in which the punches do not engage the tape and a second position in which the punches perforate the tape, said arms normally occupying said first position, whereby said arms move from said first position to said second position when said mark receiving means engages said indicator means, said punches defining said field on said tape when said arms are in said second position.
Claim 7
Dependent Claim
49 words
A well tool according to claim 3 wherein said mark receiving means includes a cartridge, said cartridge including recesses disposed in the upper end of said cartridge, said recesses cooperating with said punches such that said punches perforate said tape by passing through said tape and into said recesses.
Claim 8
Dependent Claim
34 words
A well tool according to claim 6 wherein said cartridge includes a resilient elastomeric platen, said platen being disposed in the upper end of said cartridge, and said recesses being disposed in said platen.
Claim 9
Dependent Claim
19 words
A well tool according to claim 7, wherein said platen is dovetailed into the upper end of said cartridge.
Claim 10
Dependent Claim
96 words
A well tool according to claim 1, wherein said well tool includes a means for insertion of said instrument into and retrieval from said flow tube, said means includes a fishing head disposed on the upper end of said instrument adapted for engagement with an overshot wire line fishing tool, said fishing head being connected to said upper end of said instrument by means of a rod, and said rod having radially extending webs azimuthally spaced apart on the longitudinal surface of said rod to seat the upper end of said instrument within said flow tube.
Claim 11
Dependent Claim
117 words
A well tool according to claim 1, wherein said instrument includes a support, said mark receiving means includes a cartridge, said cartridge being movable relative to said support, said support having a key with a cam and said cartridge having a marking tape and a means controlled by a pawl to move said marking tape relative to said cartridge, said pawl engaging said cam upon the downward movement of said cartridge thereby rotating the pawl and causing the tape to move, and said pawl being biased against said key by a spring such that the upward movement of said cartridge causes the withdrawal of said cam thereby rotating the pawl and causing the tape to move further.
Claim 12
Dependent Claim
47 words
A well tool according to claim 10 wherein said spring biasing the pawl against the key is a sear spring, said sear spring being under compression between the pawl and the body of said cartridge, and said pawl having an extended side for contact with said key.
Claim 13
Dependent Claim
185 words
A well tool comprising: a flow tube for connection in a drill string to transmit drilling fluid, an instrument mounted in said flow tube, said instrument including indicator means responsive to a well characteristic for producing an indication measuring said characteristic, recording means to record the indication of said indicator means, a flow responsive means responsive to the rate of flow through said flow tube to actuate said recording means, said recording means including marking means carried by said indicator means and mark receiving means actuated by said flow responsive means to actuate said recording means, and said well tool including a means for insertion of said instrument into and retrieval from said flow tube, said means including a fishing head disposed on the upper end of said instrument adapted for engagement with an overshot wire line fishing tool, said fishing head being connected to said upper end of said instrument by means of a rod, and said rod having radially extending webs azimuthally spaced apart on the longitudinal surface of said rod to seat the upper end of said instrument within said flow tube.
Claim 14
Dependent Claim
185 words
A well tool comprising: a flow tube for connection in a drill string to transmit drilling fluid, an instrument mounted in said flow tube, said instrument including indicator means responsive to a well characteristic for producing an indication measuring said characteristic, recording means to record the indication of said indicator means, a flow responsive means responsive to the rate of flow through said flow tube to actuate said recording means, said recording means including marking means carried by said indicator means and mark receiving means actuated by said flow responsive means to actuate said recording means, and said well tool including a means for insertion of said instrument into and retrieval from said flow tube, said means including a fishing head disposed on the upper end of said instrument adapted for engagement with an overshot wire line fishing tool, said fishing head being connected to said upper end of said instrument by means of a rod, and said rod having radially extending webs azimuthally spaced apart on the longitudinal surface of said rod to seat the upper end of said instrument within said flow tube.
Claim 15
Dependent Claim
206 words
A well tool comprising: a flow tube for connection in a drill string to transmit drilling fluid, an instrument mounted in said flow tube, said instrument including indicator means responsive to a well characteristic for producing an indication measuring said characteristic, recording means to record the indication of said indicator means, a flow responsive means responsive to the rate of flow through said flow tube to actuate said recording means, said recording means including marking means carried by said indicator means and mark receiving means actuated by said flow responsive means to actuate said recording means, and said instrument includes a support, said mark receiving means includes a cartridge, said cartridge being removable relative to said support, said support having a key with a cam and said cartridge having a marking tape and a means controlled by a pawl to move said marking tape relative to said cartridge, said pawl engaging said cam upon the downward movement of said cartridge thereby rotating the pawl and causing the tape to move, and said pawl being biased against said key by a spring such that the upward movement of said cartridge causes the withdrawal of said cam thereby rotating the pawl and causing the tape to move further.
Claim 16
Dependent Claim
206 words
A well tool comprising: a flow tube for connection in a drill string to transmit drilling fluid, an instrument mounted in said flow tube, said instrument including indicator means responsive to a well characteristic for producing an indication measuring said characteristic, recording means to record the indication of said indicator means, a flow responsive means responsive to the rate of flow through said flow tube to actuate said recording means, said recording means including marking means carried by said indicator means and mark receiving means actuated by said flow responsive means to actuate said recording means, and said instrument includes a support, said mark receiving means includes a cartridge, said cartridge being removable relative to said support, said support having a key with a cam and said cartridge having a marking tape and a means controlled by a pawl to move said marking tape relative to said cartridge, said pawl engaging said cam upon the downward movement of said cartridge thereby rotating the pawl and causing the tape to move, and said pawl being biased against said key by a spring such that the upward movement of said cartridge causes the withdrawal of said cam thereby rotating the pawl and causing the tape to move further.
Claim 17
Dependent Claim
47 words
A well tool according to claim 13, wherein said spring biasing the pawl against the key is a sear spring, said sear spring being under compression between the pawl and the body of said cartridge, and said pawl having an extended side for contact with said key.
References Cited (Backward Citations)
US2775043A
Cited
US2770887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |