Apparatus and method for planting seismic sensors

• US 6,002,641 A
• Filed: 04/28/1998
• Issued: 12/14/1999
• Est. Priority Date: 04/28/1998
• Status: Expired due to Term

• Current Assignee: INOVA Limited
• Original Assignee: Input/Output Incorporated
• Inventors: Chien, Loring
• Primary Examiner(s): Oda, Christine K
• Assistant Examiner(s): JOLLY, ANTHONY S
• Application Number:
  US09/067,206
• Time in Patent Office: 595 Days
• Field of Search: 367/37, 367/76, 367/77, 367/58, 367/49, 367/51, 367/78, 181/108, 181/112
• US Class Current: 367/58
• CPC Class Codes: G01V 1/168 Deployment of receiver elements G01V1/3843 takes precedence

Abstract

An apparatus and method are provided for ensuring good coupling and vertically planting of seismic receivers while substantially reducing the need for interconnecting wires and costly surveys. The apparatus includes an acquisition unit (AU) 20 for measuring seismic energy and a planting member 12 for engaging and planting the AU 20. An electronic surveying instrument 14 is coupled to the planting member 12 for determining the location of the AU 20. An installer 16 plants the AU 20 in the terrain 22 in near vertical alignment using the planting member 12. Once the AU 20 is planted in near vertical alignment, coordinates are downloaded from the electronic survey unit to locate the planted AU 20.

Claims

1. An apparatus for detecting seismic energy comprising:

a. an acquisition unit for measuring seismic energy;

b. a planting member for engaging and planting the acquisition unit; and

c. an electronic surveying unit coupled to the planting member for determining the location of the acquisition unit.

2. The apparatus of claim 1 wherein the acquisition unit engages the planting member such that an axis of the acquisition unit is aligned with an axis of the planting member.

3. The apparatus of claim 1 wherein the acquisition unit comprises:

a. a communication coil for communicating with the electronic surveying unit through the planting member;

b. an electronic circuit coupled to the communication coil for recording seismic information and history of the acquisition unit; and

c. geophone coupled to the electronic circuit for measuring seismic energy propagation through a field.

4. The apparatus of claim 3 wherein the electronic circuit comprises:

a. a power source for supplying power to the acquisition unit during remote operation;

b. a central processing unit coupled to the power source and the communication coil for processing and storing information;

c. a tilt switch coupled to the central processing unit for determining vertical alignment of the acquisition unit; and

d. a collection unit coupled to the geophone and the central processing unit for recording the measured seismic energy.

5. The apparatus of claim 3 wherein the acquisition unit further comprises:

a. a telemetry unit coupled to the central processing unit for transmitting and receiving information to and from a remote source; and

b. an antenna coupled to the telemetry unit for enhancing transmission and reception.

6. The apparatus of claim 1 wherein the acquisition unit comprises:

a. a housing for encasing an electronic circuit;

b. at least two catches attached to an outside upper portion of the housing for engaging the planting member; and

c. a spike extending from a lower end of the housing for coupling the acquisition unit to a field for detection of the seismic energy.

7. The apparatus of claim 6 wherein the acquisition unit further comprises:

a. a communication coil for receiving coordinates from the electronic surveying unit;

b. a central processing unit coupled to the communication coil for storing and processing data;

c. a tilt switch having an electronic latch coupled to the central processing unit for determining if the acquisition unit has deviated from vertical;

d. a collection unit coupled to the central processing unit for storing measurements detected by the acquisition unit;

e. a geophone coupled to the collection unit for measuring the seismic energy;

f. a telemetry unit coupled to the central processing unit for transmitting and receiving data; and

g. an antenna coupled to the telemetry unit.

8. The apparatus of claim 1 wherein the head portion comprises:

a. a head communication coil secured in the head portion for communicating with the acquisition unit; and

b. a pressure sensing unit secured in the head portion for detecting pressure changes imposed on the head portion during planting of the acquisition unit.

9. The apparatus of claim 1 wherein the head portion includes at least two notches defined in an inner surface thereof for engaging the acquisition unit.

10. The apparatus of claim 1 wherein the handle portion includes a tilt switch for detecting whether the vertical alignment of the acquisition unit is within a tolerance margin.

11. The apparatus of claim 10 wherein the tolerance margin is fifteen degrees from vertical.

12. The apparatus of claim 11 wherein the planting member automatically releases the acquisition unit when the signal is received.

13. A method for planting and locating an acquisition unit in near vertical alignment in a field comprising the steps of:

a. engaging the acquisition unit with a planting member;

b. coupling an electronic surveying unit to the planting member;

c. planting the acquisition unit in a field in near vertical alignment using the planting member; and

d. downloading coordinates from the electronic surveying unit to the planted acquisition unit.

14. The method of claim 13 wherein the step of planting comprises the steps of:

a. mounting the acquisition unit on a head portion of the planting member;

b. coupling the acquisition unit to the field using the planting member;

c. generating a first signal in response to a tilt switch of the acquisition unit indicating that the acquisition unit is in near vertical alignment within a tolerance range; and

d. determining positioning coordinates for the acquisition unit in response to the first signal.

15. The method of claim 14 wherein the step of generating a first signal comprises the steps of:

a. detecting an increase in pressure between the acquisition unit and the planting member;

b. monitoring a tilt switch to determine whether the acquisition unit has been planted in near vertical alignment within the tolerance range to generate the signal; and

c. resetting the tilt switch to indicate that the acquisition unit has been planted in near vertical alignment within the tolerance range.

16. The method of claim 14 further comprising the steps of:

a. replanting the acquisition unit in response to the tilt switch indicating that the acquisition unit was not planted in near vertical alignment within the tolerance range;

b. generating a second signal in response to the tilt switch indicating that the replanted acquisition unit is in near vertical alignment within the tolerance range; and

c. determining the coordinates in response to the second signal.

17. The method of claim 16 wherein the step of generating a second signal comprises the steps of:

a. detecting, in sequence, a decrease and an increase in pressure between the acquisition unit and the planting member to indicate that the acquisition unit has been replanted;

b. monitoring the tilt switch to determine whether the acquisition unit has been replanted in near vertical alignment within the tolerance range to generate the second signal; and

c. resetting the tilt switch to indicate that the acquisition unit has been planted in near vertical alignment within the tolerance range.

18. The method of claims 15 wherein the tolerance range is a fifteen degree deviation from the vertical.

19. The method of claim 13 further comprising the step of separating the acquisition unit from the planting member after the acquisition unit has been planted in near vertical alignment within a tolerance range.

20. An apparatus for detecting seismic energy comprising:

an acquisition unit for measuring seismic energy;

a planting member for engaging and planting the acquisition unit, including;

a handle portion;

a head portion extending from the handle portion; and

a cable coupled to the handle portion for communication between the acquisition unit and the electronic surveying unit; and

an electronic surveying unit coupled to the planting member for determining the location of the acquisition unit.

21. An apparatus for detecting seismic energy comprising:

an acquisition unit for measuring seismic energy;

a planting member for engaging and planting the acquisition unit; and

an electronic surveying unit coupled to the planting member for determining the location of the acquisition unit, including;

a global positioning satellite receiver for determining coordinates for a specific location; and

an interface unit coupled to the global positioning satellite receiver and the planting member for triggering the global position satellite receiver to obtain the coordinates in response to receiving a signal from the acquisition unit.