Impact sensing during jarring operations
First Claim
Patent Images
1. An apparatus, comprising:
- a jarring tool operable for coupling within and generating an impact imparted to a downhole tool string, wherein the jarring tool comprises;
an upper housing comprising a first bore extending longitudinally therethrough;
a lower housing comprising a second bore extending longitudinally therethrough;
a shaft coupled with the lower housing and extending into the first bore of the upper housing, wherein the upper housing moves axially relative to the lower housing along the shaft;
a sensor system disposed within the second bore of the lower housing and comprising an accelerometer for detecting acceleration caused by an impact generated by movement of the upper housing away from the lower housing until corresponding impact features of the upper and lower housings collide; and
a chassis disposed within the second bore of the lower housing, wherein the chassis comprises a curved outer surface contacting a cooperatively curved inner surface of the second bore, wherein the accelerometer is coupled to the chassis, and wherein the lower housing comprises a shoulder extending radially into the second bore and contacting the chassis to maintain an axial position of the chassis within the lower housing.
3 Assignments
0 Petitions
Accused Products
Abstract
A jarring tool operable for coupling within and generating an impact imparted to a downhole tool string. The jarring tool includes an upper housing, a lower housing, and a shaft coupled with the lower housing and extending into the upper housing. The upper housing moves axially relative to the lower housing along the shaft. The jarring tool also includes an accelerometer for detecting acceleration caused by an impact generated by movement of the upper housing away from the lower housing until corresponding impact features of the upper and lower housings collide.
192 Citations
21 Claims
-
1. An apparatus, comprising:
a jarring tool operable for coupling within and generating an impact imparted to a downhole tool string, wherein the jarring tool comprises; an upper housing comprising a first bore extending longitudinally therethrough; a lower housing comprising a second bore extending longitudinally therethrough; a shaft coupled with the lower housing and extending into the first bore of the upper housing, wherein the upper housing moves axially relative to the lower housing along the shaft; a sensor system disposed within the second bore of the lower housing and comprising an accelerometer for detecting acceleration caused by an impact generated by movement of the upper housing away from the lower housing until corresponding impact features of the upper and lower housings collide; and a chassis disposed within the second bore of the lower housing, wherein the chassis comprises a curved outer surface contacting a cooperatively curved inner surface of the second bore, wherein the accelerometer is coupled to the chassis, and wherein the lower housing comprises a shoulder extending radially into the second bore and contacting the chassis to maintain an axial position of the chassis within the lower housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
11. A method, comprising:
-
conveying a downhole tool string within a wellbore, wherein the downhole tool string comprises a jarring tool comprising; an upper housing connected to an upper portion of the downhole tool string; a lower housing connected to a lower portion of the downhole tool string; a shaft coupled to the lower housing and extending into the upper housing; an accelerometer disposed within the lower housing; and a memory device disposed within the lower housing; applying tension to the downhole tool string to trigger the jarring tool to impart an impact to the downhole tool string; detecting acceleration with the accelerometer during the impact; and storing impact acceleration data generated by the accelerometer on the memory device. - View Dependent Claims (12, 13, 14, 15)
-
-
16. An apparatus, comprising:
a jarring tool for coupling between upper and lower portions of a downhole tool string, the jarring tool comprising; an impact-generating section comprising; an upper housing connected to the upper portion of the downhole tool string; a lower housing connected to the lower portion of the downhole tool string; and a shaft coupled to the lower housing and extending into the upper housing, wherein, upon sufficient tension being applied across the downhole tool string, the upper housing moves relative to the lower housing along the shaft until corresponding impact features of the upper and lower housings collide and generate an impact imparted to the downhole tool string; and an impact-sensing section contained within a central bore of the lower housing, wherein the impact-sensing section comprises; a chassis disposed within the central bore, wherein the chassis contacts a shoulder protruding into the central bore to maintain an axial position of the chassis within the central bore; an accelerometer coupled with the chassis for generating an output signal indicative of acceleration caused by the impact; a processor carried with the chassis for processing the output signal; and a memory device carried with the chassis for storing the output signal or data generated by the processor. - View Dependent Claims (17, 18, 19, 20)
-
21. An apparatus, comprising:
a jarring tool operable for coupling within and generating an impact imparted to a downhole tool string, wherein the jarring tool comprises; an upper housing comprising a first bore extending longitudinally therethrough; a lower housing comprising a second bore extending longitudinally therethrough; a shaft coupled with the lower housing and extending into the first bore of the upper housing, wherein the upper housing moves axially relative to the lower housing along the shaft; a sensor system disposed within the second bore of the lower housing and comprising an accelerometer for detecting acceleration caused by an impact generated by movement of the upper housing away from the lower housing until corresponding impact features of the upper and lower housings collide; and a chassis disposed within the second bore of the lower housing, wherein the chassis comprises a curved outer surface contacting a cooperatively curved inner surface of the second bore, wherein the accelerometer is coupled to the chassis, and wherein the chassis comprises a cavity containing an electrical energy source electrically connected with at least one component of the sensor system.
Specification